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SE-330 Neutral-Grounding-Resistor Monitor Manual Rev

1. l L O O o RMT Verify proper reaction of the circuit interrupting T device in response to a simulated or controlled ground fault current To simulate ground fault FIGURE 23 Ground Fault Test Circuits current use CT primary current injection does not apply for bushing type CT s Fig 23a shows a test TABLE 3 GROUND FAULT TEST RECORD d circuit using an SE 400 Ground Fault Relay Test DATE TE ST RESULTS Unit The SE 400 has a programmable output of 0 5 to 9 9 A for a duration of 0 1 to 9 9 seconds Set the test current to 120 of GF TRIP LEVEL Fig 23b shows a test circuit using an SE 100T Ground Fault Relay Tester The SE 100T provides a test current of 0 65 or 2 75 A for testing 0 5 and 2 0 A trip levels Inject the test current through the current sensor window for at least 2 5 seconds Verify that the circuit under test has reacted properly Correct any problems and re test until the proper reaction is verified e Record the date and the results of the test on the attached test record form NOTE Do not inject test current directly into CT input terminals 8 9 10 and 11 Retain this record for the authority having jurisdiction NOTE For accurate trip time measurement the fault current should not be re applied for the time defined by the GF TRIP TIME setting to allow t
2. 30 to 90 Hz Maximum CT lead resistance amp SE CS30 50 Other 5 Consult CT Curve CT Input Burden 5 A Input 0 01 Q 1 Input eee 0 05 Q EFCT Input 100 Thermal Withstand 1 A and 5 A Inputs Continuous 2x CT Rating 1 20 x CT Rating EFCT Input Continuous 10 x CT Rating 1 25 x CT Rating Measurement Range 25 x CT Primary Rating Trip Mode Latching Non Latching Pulsing Circuit Pulse Period 1 0 to 3 0 s 0 2 s increments Duty Cycle 5096 Time Accuracy 10 of Setting Trip Pulsing Relay K1 Contacts Configuration N O Form A Operating Mode Fail Safe or Non Fail Safe CSA UL Contact Ratings 8 A resistive 250 Vac 5 A resistive 30 Vdc Supplemental Contact Ratings Make Carry 0 2 s 30A Break nw 75 W resistive 35 W inductive L R 0 04 s CREER 2 000 VA resistive 1 500 VA inductive PF 0 4 Subject to maximums of 8 A at 250 Vac 5 A resistive at 30 Vdc and 0 4 A resistive at 250 Vdc GF K2 and RF K3 Relay Contacts Configuration N O
3. CISPR 11 2009 CISPR 22 2008 EN 55022 2010 Class A IEC 61000 3 2 and IEC 61000 3 3 Class A IEC 61000 4 2 6 kV contact discharge direct and indirect 8 kV air discharge IEC 61000 4 3 10 80 1 000 MHz 8096 AM 1 kHz 10 V m 1 0 to 2 7 GHz 8096 AM 1 kHz IEC 61000 4 4 Zone B 2 kV power supply port 1 kV all other ports IEC 61000 4 5 Zone B kV differential mode 2 kV common mode IEC 61000 4 6 10 V 0 15 80 MHz 8096 AM 1 kHz IEC 61000 4 8 50 Hz and 60 Hz 30 A m and 300 A m Littelfuse STARTCO Power Frequency IEC 61000 4 16 Zone A differential mode 100 Vrms Zone A common mode 300 Vrms 1 MHz 61000 4 18 1 kV differential mode line to line 2 5 kV common mode Voltage Interruption 61000 4 11 IEC 61000 4 29 0 for 10 20 30 50 ms dc 0 for 0 5 1 2 5 5 cycles 60 Hz IEC 61000 4 17 Level 4 15 of rated dc value Certification CSA Canada and USA amp B LR 53428 05 UL Listed LISTED Ground Fault Sensing and Relaying Equipment 4FX9 E340889 Australia N11659 CE European Union FCC FE To CSA C22 2 No 14 Industrial Control Equipment UL 508 Industrial Control Equipment UL 1053 Ground Fault Sensing and Relaying Equipment CE Low Voltage Directive IEC 61010 1 2010 3 Edition FCC
4. 1 Thermal 8 400 Vac 1 900 Vac Torque Terminal N Shipping Weight Page 31 Rev 10 K 090815 40 to 60 C 40 to 140 F 55 to 80 C 67 to 176 F 55 to 60 C 67 to 140 F 600 Vac 30 mA Continuous 6 minutes on 60 minutes off 300 g 0 7 Ib 2 500 Vac 125 mA Continuous 5 6 N m 50 in Ib 9 0 N m 80 in Ib 5 0 kg 11 Ib 2 500 Vac 125 mA Continuous 5 6 N m 50 in Ib 9 0 N m 80 in Ib 5 0 kg 11 Ib 8 400 Vac 84 mA 100 minute on 120 minutes off Continuous 9 0 N m 80 in Ib 5 0 kg 11 Ib Littelfuse STARTCO ER 25KV SE 330 Neutral Grounding Resistor Monitor Maximum Voltage Maximum Current Resistance Thermal 14 400 Vac 2 500 Vac Torque Terminal N Shipping Weight ER 35KV Maximum Voltage Maximum Current Resistance Thermal 22 000 3 000 Vae ener Torque Terminal N Shipping Weight Certification NOTES Electrical specifications have Littelfuse lab 6 3 CURRENT SENSORS Environment Operating Temperature
5. USB Device Connector Mini B SD Memory Card Type enti irren Standard Grade Form Factor microSD FOttnal aane rens FAT32 Capacity 512 MB to 4 GB microSD and microSDHCTM Operating Temperature Standard Grade Included 25 to 85 C 13 to 140 F Industrial Grade 40 to 85 C 40 to 140 F Terminal Block Ratings 10 A 300 Vac 12 AWG 2 5 mm PWB Conformal Coating MIL 1 46058 qualified UL QMJU2 recognized Mounting Configurations Panel Mount and Optional Surface Mount Dimensions Height iiec 213 mm 8 4 Width NE 99 mm 3 9 SE 330 Neutral Grounding Resistor Monitor Shipping Weight Environment EMC Tests Page 30 Rev 10 K 090815 132 mm 5 2 2 0kg 4 4 Ib 40 to 60 C 40 to 140 F 55 to 80 C 67 to 176 F 85 Non Condensing IP30 ANSI IEEE C37 90 1 1989 Oscillatory and Fast Transient Verification tested in accordance with EN 60255 26 2013 Radiated and Conducted Emissions Current Harmonics and Voltage Fluctuations Electrostatic Discharge Radiated RF Immunity Fast Transient Surge Immunity Conducted RF Immunity Magnetic Field Immunity
6. STARTCO NOTES 2 AND 4 E TOP d MINIMUM DISTANCE TO ADJACENT OBJECTS 1 DIMENSIONS IN MILLIMETRES ile INCHES NOTE 3 2 TERMINALBLOCK SCREWS 6 32 x 0 25 MINIMUM CLEARANCE FROM BASE i 305 0 12 00 i 3 MOUNTING SCREWS M6 OR 0 25 20 4 USE LIQUID TIGHT FITTING FORTERMINAL BLOCK ENCLOSURE CABLE ENTRY 5 CERTIFICATIONS NOT SHOWN MOUNTING DETAIL FIGURE 13 ER 15KV Sensing Resistor Littelfuse STARTCO SE 330 Neutral Grounding Resistor Monitor 780 0 30 70 FA STARTCO NOTES 2 AND at 0 25 20 BINDING HEAD TOP 340 0 13 38 MINIMUM CLEARANCE FROM BASE 508 0 20 00 MINIMUM DISTANCE TO ADJACENT OBJECTS MOUNTING DETAIL FIGURE 14 ER 25KV Sensing Resistor Page 18 Rev 10 K 090815 RATINGS MAXIMUM VOLTAGE 14 400 Vac MAXIMUM CURRENT 144 mA RESISTANCE 100 kQ THERMAL 14 400 Vac 1 MINUTE ON 120 MINUTES OFF 2 500 Vac CONTINUOUS TORQUE TERMINALN 9 0 N m 80 in Ib NOTES 1 DIMENSIONS IN MILLIMETRES INCHES TERMINAL BLOCK SCREWS 6 32 x 0 25 MOUNTING SCREWS M6 OR 0 25 20 USE LIQUID TIGHT FITTING FORTERMINAL
7. Storage Temperature EFCT 1 Current Ratio Insulation Window Diameter Shipping Weight Certifications Compliance Extended Operating Temperature Supplemental Specifications Trip Level Accuracy 1 minute on 120 minutes off Continuous 9 0 N m 80 in Ib 20 kg 44 Ib 22 000 Vac 220 mA 100 minute on 120 minutes off Continuous 9 0 N m 80 in Ib 40 kg 88 Ib CSA Canada and USA GR LR 53428 05 UL Listed LISTED Ground Fault Sensing and Relaying Equipment 4FX9 E340889 CE European Union been verified at a 40 to 60 C 40 to 140 F 55 to 80 C 67 to 176 F 5 0 05 A 600 V Class 82 mm 3 2 0 9 kg 2 0 Ib CSA UL CE RoHS IEC 60044 1 55 to 60 C 67 to 140 F 1 of CT Primary Rating 3 of CT Primary Rating Page 32 Rev 10 K 090815 EFCT 26 Current Ratio 5 0 05 A Insulation 600 V Class Window Diameter 26 mm 1 07 Shipping Weight 0 45 kg 1 0 Ib Certifications CSA UL CE Compliance RoHS IEC 60044 1 Extended Operating Temperature 55 to 60 C 67 to 140 F Supplemental Specifications Trip Level Accuracy SA eo
8. 2 1 2 GF TRIP LEVEL The SE 330 uses a Discrete Fourier Transform DFT Algorithm to measure the fundamental component of NGR current Choose an NGR let through current and ground fault trip level according to the guidelines in Section 1 1 Set the ground fault trip level as a percentage 2 to 100 of the CT primary rating When the GF Trip Level is set to MEM the ground fault setting stored in non volatile memory is used This parameter must be set using a PC running the SE MON330 software connected to the USB interface The setting range is 2 to 100 of CT primary rating in 1 increments The default value is 15 Inputs are provided for 5 1 and 0 05 A secondary CT s Typical values for 5 15 and 25 A tripping systems are shown in Table 1 Ground fault trip levels for selected CT s are shown in Table 2 For other systems refer to the NGR Monitor Set Point Assistant at www littelfuse com relayscontrols The Set Point Assistant is included with the SE MON330 software 2 1 3 Vy TRIP LEVEL The SE 330 uses a DFT algorithm to measure the fundamental component of neutral voltage Vy If neutral voltage is greater than the Vy TRIP LEVEL setting for the duration of the resistor fault trip time and ground fault current is less than 5 of the CT rating the SE 330 will trip on resistor fault If the resistor fault circuit is tripped and the neutral voltage exceeds the Vx TRIP LEVEL setting for an interval greater than the GF TRIP TIM
9. SE CS30 X NOTE 17 ER SERIES SENSING RESISTOR ALTERNATE CT CONNECTIONS L SUPPLY N SUPPLY K UNIT HEALTHY RESISTOR FAULT CONNECTION NOTE 14 REMOTE goe RESET PULSE ENABLE ANALOG OUTPUT O 1 RESET 16 OVO lt PULSE ENABLE l So 17 4 osPG 5 o SPGA OPTIONAL 330 NETWORK COM NOTE 10 INDICATION GROUND FAULT DA TRIP X RESISTOR FAULT TRIP 374 DIAGNOSTIC SS CALIBRATED 555 N Y RELAY K1 d NS ES 74 POWER FIGURE 3 SE 330 Connection Diagram PGA 0520 aoe USB PORT NOTE 9 MICRO SD SLOT NOTES 1 USE SEPARATE LUGTO CONNECT SENSING RESISTORTERMINAL NTO NEUTRAL LOCATETHESE COMPONENTS NEAR TRANSFORMER OR GENERATOR ALTERNATE SENSING RESISTOR TERMINAL N CONNECTION THE NEUTRAL CONNECTION IS NOT MONITORED VOLTAGE BETWEEN SENSING RESISTOR TERMINALS R AND G IS LIMITEDTO 100 V BY INTERNAL CLAMP SEE SECTION 3 4 FOR ISOLATED GROUND CONNECTION RELAY CONTACTS SHOWN WITH SE 330 DE ENERGIZED OPTIONAL N C K4 AVAILABLE LOOP POWERED CONNECTION USES TERMINALS 19 AND 20 ONLY MINI B USB DEVICE CONNECTOR REFERTO APPROPRIATE SE 330 COMMUNICATIONS INTERFACE MANUAL TWO CONDUC
10. 330 Neutral Grounding Resistor Monitor REVISION 10 E 010814 SECTION 6 Extended operating temperatures added to all sensing resistors and SE CS30 current sensors REVISION 10 D 112913 SECTION 6 CE added to sensing resistors SECTION 7 Ordering information updated REVISION 10 C 100813 SECTION 2 Section 2 8 updated SECTION 4 Real Time Clock note added in Section 4 2 SECTION 5 LED and relay status added to troubleshooting solutions SECTION 7 Ordering information updated REVISION 10 B 091213 APPENDIX A Hardware revision updated REVISION 10 A 083013 SECTION 1 Faceplate updated New features added SECTION 2 Communications options updated Configuration switches updated Indication relays explanation added Non volatile memory error added SECTION 3 Connection drawing updated SECTION 4 Section heading changed to Data Interfaces Updated with microSD and USB interfaces Upgrade procedure added SECTION 5 Non volatile memory error added Switch S8 diagnostic LED error removed SECTION 6 Ground fault circuit trip level updated USB communications specifications added Resistor fault accuracy changed microSD memory card specifications added SECTION 7 Ordering information updated SE 330 SMA Surface Mount Adapter is now listed as an accessory only APPENDIX A Added revision history Page 37 Rev 10 K 090815 WA Littelfuse Page 38 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 HARDWARE RE
11. 850 14 400 15 554 ER 15KV 100 3 0 340x5 1 700 4 160 25 96 ER 5KV 20 5 0 800 7 200 25 166 ER 15KV 100 5 0 170x5 850 14 400 25 332 ER 15KV 100 5 0 340x5 1 700 25 000 25 577 ER 25KV 100 5 0 800x5 4 000 35 000 25 808 ER 35KV 100 5 0 1 200 5 6 000 TABLE 2 GROUND FAULT TRIP LEVELS FOR SELECTED CT S GF TRIP EFCT x SE CS30 x 50 1 100 1 200 1 400 1 LEVEL 5 0 05 30 0 05 50 5 100 5 200 5 400 5 AMPERES AMPERES AMPERES AMPERES AMPERES AMPERES 2 0 10 0 60 P 5 4 0 20 1 20 j 16 6 0 30 1 80 T 12 24 8 0 40 2 40 8 16 36 10 0 50 3 00 2 10 20 40 20 1 00 6 00 10 20 40 80 40 2 00 12 0 20 40 80 160 60 3 00 18 0 30 60 120 240 80 4 00 24 0 40 80 160 320 100 5 00 30 0 50 100 200 400 0 When set to MEM range is 2 to 100 in 1 increments Setting not recommended 2 1 4 PULSE PERIOD ADJUSTMENT Pulse period is the cycle time of relay K1 when the SE 330 is configured for pulsing operation Pulse period CALIBRATION BUTTON PULSING and install an external pulse enable switch HODHSCD is adjustable from 1 0 to 3 0 seconds with a fixed duty CAL cycle of 50 For example with the 1 0 s setting relay _ K1 will alternately be energized for 0 5 seconds and de 22 energized for 0 5 seconds when pulsing is enabled TN a NONTATCHING GE TRIS See Section 2 3 for detailed pulsing operation LATCHING RF TRIP
12. BLOCK ENCLOSURE CABLE ENTRY MOUNT AS SHOWN WITH BASE HORIZONTAL CERTIFICATIONS NOT SHOWN WA Littelfuse Page 19 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 RATINGS MAXIMUM VOLTAGE 22 000 Vac MAXIMUM CURRENT 220 mA RESISTANCE THERMAL 22 000 Vac 1 MINUTE ON 120 MINUTES OFF 3 000 Vac CONTINUOUS TORQUE TERMINALN 9 0 N m 80 in Ib 0 25 20 BINDING HEAD TOP MINIMUM CLEARANCE FROM BASE 685 0 27 00 MINIMUM DISTANCE TO ADJACENT OBJECTS MOUNTING DETAIL DIMENSIONS IN MILLIMETRES INCHES TERMINALBLOCK SCREWS 6 32 x 0 25 MOUNTING SCREWS M6 OR 0 25 20 USE LIQUID TIGHT FITTING FOR TERMINAL BLOCK ENCLOSURE CABLE ENTRY MOUNT AS SHOWN WITH BASE HORIZONTAL CERTIFICATIONS NOT SHOWN FIGURE 15 ER 35KV Sensing Resistor WA Littelfuse Page 20 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 3 3 GROUND FAULT CT Select and install a ground fault CT that will provide the desired trip level Typically the CT primary rating should be approximately equal to the NGR let through current rating This provides an appropriate GF TRIP LEVEL setting range and analog output scaling See Sections 2 1 2 and 2 9 Outline and mounting details for the EFCT and SE CS30 series current sensors are shown in Figs 16 1
13. CFR47 Part 15 Subpart Class A Unintentional Radiators Compliance RoHS Pending NOTES See sensing resistor specifications for applicable voltage limits Accuracy included for EFCT x and SE CS30 x current sensors only 9 microSD and microSDHC are trademarks of SD 3C LLC Remote reset and pulse enable wiring is limited to 10 m 32 This value can only be modified using SE MON330 software See Section 4 2 SE 330 Neutral Grounding Resistor Monitor 6 2 SENSING RESISTORS Environment Operating Temperature Storage Temperature Extended Operating Temperature ER 600VC Maximum Voltage Maximum Current Thermal Shipping Weight ER 5KV Maximum Voltage Maximum Current Resistance Thermal Torque Terminal N 10 32 Insert Others Shipping Weight ER 5WP Maximum Voltage Maximum Current Th rmal es Torque Terminal N 10 32 Insert Oth rS Shipping Weight ER 15KV Maximum Voltage Maximum Current
14. Continuous 41420106 with SE 325 SE 330 SE 330AU Rating cc EA Littelfuse STARTCO wv ER 6OO0VC SENSING RESISTOR SENSING RESISTOR Serial No GC131105487 o 600 VAC MAX Littelfuse STARTCO 4 5 0 18 DIA C BORE 10 0 0 39 DIA 3 2 0 13 DEEP SIDE NOTES 1 DIMENSIONS IN MILLIMETRES INCHES 2 TERMINAL BLOCK SCREWS 6 32 x 0 25 3 MOUNTING SCREWS M4 OR 8 32 MOUNTING DETAIL 4 ON REVISION 2 UNITS ENCLOSURE IS ELECTRICALLY CONNECTEDTO TERMINAL G THROUGH JUMPER FROM TERMINAL G TO 2 SCREW THIS CONNECTION MAY BE REMOVED FOR DIELECTRIC STRENGTH TESTING ENSURETHAT THE JUMPER IS INSTALLED AFTER TESTING ON REVISION 1 UNITS G SCREW IS NOT PRESENT AND ENCLOSURE IS ELECTRICALLY CONNECTEDTOTERMINAL G NOT ALL CERTIFICATIONS SHOWN FIGURE 8 ER 600VC Sensing Resistor WA Littelfuse Page 13 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 o 120 4 4 74 ENCLOSURE TOP VIEW COVER INSIDE VIEW COVER REMOVED a M6 OR 0 25 20 120 4 4 74 ENCLOSURE TOP VIEW MOUNTING DETAIL NOTES 1 DIMENSIONS IN MILLIMETRES INCHES 2 MOUNTING SCREWS M6 OR 0 25 20 eee eae ENCLOSURE SIDE VIEW FIGURE 9 SE
15. Extended Operating Temperature 55 to 60 C 67 to 140 F NOTES 9 Electrical specifications have been verified at a Littelfuse lab Littelfuse STARTCO 7 ORDERING INFORMATION SE 330 E K4 Contact 0 N O UNIT HEALTHY Contact 1 N C UNIT HEALTHY Contact Options 0 No Options Network Communications None DeviceNet Ethernet Dual RJ45 Ethernet SC Fiber amp RJ45 Ethernet Dual SC Fiber IEC 61850 Dual RJ45 IEC 61850 SC Fiber amp RJ45 8 IEC 61850 Dual SC Fiber Supply 0 Universal ac dc Supply 2 48Vdc Supply OO 00 SE 330 Neutral Grounding Resistor Monitor NOTE Please refer to the SE 330 Product Change Notice PCN document for updated ordering information and new revision details available at www littelfuse com se 330 NOTE The SE 330 SMA Surface Mount Adapter is available as an accessory only Sensing Resistors ER 600VC For system voltages up to 1 kVac ER SK Vere erento For system voltages up to 5kVac BR SWP eene resi For system voltages up to 5 kVac weather protected ER 15KY For system voltages up to 15 kVac 229 teen eiie For system voltages up to 25 kVac ERIK For system voltages up to 35 kVac Current Sensor 5 A primary rating 82 mm 3 2 Window 6 m 19 5 of 22 AWG 3 3 mm sh
16. LEVEL setting and if NGR current is less than 5 of the current transformer CT rating the SE 330 will trip on resistor fault If the resistor fault circuit is tripped and the neutral voltage exceeds the Vn TRIP LEVEL setting for an interval greater than the GF TRIP TIME setting the ground fault circuit will also trip Ground fault current is sensed by a CT with a 1 or 5 A secondary or by a CT EFCT x or SE CS30 x with a 50 mA secondary The trip level of the ground fault circuit is adjustable from 2 to 100 of the CT rating and trip time is adjustable from 0 1 to 10 0 seconds The SE 330 has four output relays Relay K1 can be assigned a trip or a pulsing function Relays K2 and K3 provide ground fault and resistor fault indication K4 is a solid state relay that provides UNIT HEALTHY indication When relay is assigned the trip function it will operate on either a resistor fault or ground fault and it can be set to operate in the fail safe or non fail safe mode for undervoltage or shunt trip applications When Littelfuse STARTCO the pulsing function is selected relay K1 is used to control a contactor to assist in locating faults Additional features include LED trip indication trip memory front panel and remote reset 4 20 mA analog output trip event recorder USB local communications microSDTM data logging and optional network communications The SE 330 provides additional features over the SE 330 legacy mo
17. Latch 54 4 2 1 5 5 Sensing Resistor Selection S5 4 2 1 5 6 Frequency S 4 2 1 5 7 Upgrade Mode 8 4 2 1 6 Resistor Fault Trip Time 4 2 1 7 Resistor Fault Trip Level 4 2 1 8 Geo Magnetic Filter 4 2 2 Calibration sese 4 2 3 Pulsing 5 2 4 Trip Indication and Reset 5 2 5 Remote Operation 5 2 6 Relay 5 2 7 Unit Healthy 2 5 2 8 Diagnostic LED serene 5 2 9 Analog Output sess 6 3 Installation sese 6 MC 6 3 2 Sensing 12 3 3 Ground Fault 20 3 4 Isolated Ground Connection 25 3 5 Pulsing Connection 2 2 2 25 4 Data Interfaces 26 4 SD 26 4 1 1 Datalogging eeeeen 26 4 1 2 Firmware Upgrade 26 42 USB Interface iecore eite 26 4 3 Network Communications 26 5 Troubleshootinsg 27 6 Technical Specifications 29 61 SE 330 29 6
18. and N C Form C Operating Mode Non Fail Safe or Fail Safe CSA UL Contact Ratings 8 A resistive 250 Vac 8 A resistive 30 Vdc Supplemental Contact Ratings Make Carry 0 2s 20A Break WG 50 W resistive 25 W inductive L R 0 04 s Littelfuse STARTCO p T E 2 000 VA resistive 1 500 VA inductive PF 0 4 Subject to maximums of 8 A at 250 Vac 8 A resistive at 30 Vdc and 0 4 A resistive at 150 Vdc Unit Healthy Output K4 Option 0 Configuration N O Form A Operating Mode Closed when Healthy 100 mA 250 V ac or dc Closed Resistance 30 to 50 Q Unit Healthy Output K4 Option 1 Configuration N C Form B Operating Mode Open when Healthy Batmps sonet 100 mA 250 V ac or dc Closed Resistance 2510500 Auto reset time 2 8 s maximum 4 20 mA Analog Output Self Powered and Loop Powered Range usan ana quina 4to 22 mA Loop Voltage 8 to 36 Vdc Load u u y 500 O maximum with 24 Vdc supply Isolation 120 Vac Parameter NGR Current 20 mA CT Primary Current USB Communications Baud Rate 12 Mbit s Protocol
19. reset when the fault clears and power up trip memory is defeated even when configuration switch S2 is set to fail safe The maximum automatic reset time is 2 8 s The red DIAGNOSTIC LED annunciates latched calibration error and remote trips See Section 2 8 When supply voltage is applied with switch S2 set to FAIL SAFE the SE 330 returns to its state prior to loss of supply voltage unless switch S3 or S4 is set to non latching When supply voltage is applied with switch S2 set to NON FAIL SAFE SE 330 trips are reset When a local remote or network reset is issued both trip LED s will flash if they are off Resistor fault trip reset can take up to one second Resistor fault trip memory trip can take up to three seconds after SE 330 power up SE 330 Neutral Grounding Resistor Monitor Page 5 Rev 10 K 090815 2 5 REMOTE OPERATION Relays K2 and K3 can be used for remote indication and terminals 15 and 16 are provided for remote reset RK 332 Remote Indication and Reset components are shown in Fig 19 Connect them as shown in Fig 3 RK 332 components are not polarity sensitive Indication relays can be set to fail safe or non fail safe operation using the SE MON330 software or network communications The default mode is non fail safe In non fail safe mode relays energize on fault Network enabled SE 330 s can be remotely tripped and reset by the network master The red DIAGNOSTIC LED indicates a network initiated trip See Sec
20. s4 NON LATCHING RF TRIP information BM 100 kQ NOTE For pulsing configuration set switch S1 to K1 se EH jJ EH jJ RUN UPGRADE 2 1 5 CONFIGURATION SETTINGS D Eight configuration switches S1 to S8 and a calibration button are located behind the access cover on the front panel See Fig 1 NOTE 1 DEFAULT SETTINGS SHOWN FIGURE 1 Configuration Switches Littelfuse STARTCO 2 1 5 1 RELAY K1 FUNCTION 51 Set switch S1 to K1 TRIP to assign the trip function to relay K1 and to activate switch S2 Relay K1 will change state when a resistor fault or ground fault trip occurs Set switch S1 to K1 PULSING to configure relay for pulsing operation See Section 2 3 2 1 5 2 TRIP RELAY MODE AND TRIP MEMORY MODE 52 Set switch S2 to select the operating mode of trip relay K1 In the non fail safe mode relay K1 energizes and its contact closes when a trip occurs The non fail safe mode can be used to trip shunt trip circuit breakers In the non fail safe mode SE 330 trips are reset when supply voltage is cycled In the fail safe mode relay K1 energizes and its contact closes if there are no trips Contacts open if there is a trip a loss of supply voltage or a processor failure In the fail safe mode SE 330 trips are not reset when supply voltage is cycled NOTE Switch S2 does not affect the operating modes of relays K2 K3 and K4 NOT
21. systems In an alarm only system or in a tripping system without selective coordination choose an NGR with a let through current larger than the system charging current and set the pick up current of ground fault devices at or below 5096 of the NGR let through current In a tripping system with selective coordination use ground fault devices with a definite time characteristic to achieve time coordination Use the same pick up current for all ground fault devices this value must be larger than the charging current of the largest feeder Select an NGR with a let through current between five and 10 times the pick up current of the ground fault devices Do not use a grounding transformer with a low voltage resistor e The combined cost of a transformer and a low voltage resistor is more than the cost of a resistor rated for line to neutral voltage transformer saturated by a ground fault through a rectifier can make ground fault protection inoperative e Transformer inrush current up to 12 times rated current can cause a ground fault voltage larger than expected e parallel transformer winding makes it difficult to monitor NGR continuity SE 330 Neutral Grounding Resistor Monitor Page 1 Rev 10 K 090815 transformer can provide the inductance necessary to cause ferroresonance if the NGR opens Following these guidelines will reduce the flash hazard reduce point of fault damage achieve reliable ground fault p
22. 000 Vac Accuracy 10 of setting 3 dB Frequency Response S6 50 HZz 25 to 85 Hz S6 60 HZz 30 to 90 Hz NGR Calibration Range ER 600VC ER 5KV or ERS WP 2 5 2 2 usa 0 to 2 kQ ER 15KV to ER 35KV 0 to 10 KQ Trip Resistance Vy 0 ER 600VC ER 5KV or ER 5WP 250 to 750 Q change 200 O Default 500 O change ER 15KV to ER 35KV 1 25 to 3 75 change 1 kO Default aa asa 2 5 kO change Neutral To Ground DC Voltage Rejection ER 600VC ER 5KV or 5 25 Vdc ER 15KV to ER 35KV 125 Vdc Trip Time 12 0605 15 Trip Hold Off Level 5 of CT Primary Rating Trip Mode Latching Non Latching Ground Fault Circuit Trip Level 2 4 6 8 10 20 40 60 80 100 of CT Primary Rating or 2 to 100 using MEM parameter Trip Time 0 1 0 2 0 3 0 4 0 5 0 7 1 0 2 0 3 0 5 0 10 0 s SE 330 Neutral Grounding Resistor Monitor Page 29 Rev 10 K 090815 Trip Level Accuracy Maximum of 1 of CT Primary Rating or 396 of Setting Trip Time Accuracy 10 of Setting 20 ms minimum 3 dB Frequency Response S6 50 HZz 25 to 85 Hz S6 60 HZz
23. 2 Sensing Resistors 31 6 3 Current 32 7 Ordering 33 8 Warranty u ansa aaa 34 9 Test 1 34 9 1 Resistor Fault Tests 34 SE 330 Neutral Grounding Resistor Monitor Page ii Rev 10 K 090815 9 1 1 Calibration and Open Test 34 9 1 3 Voltage 34 9 2 Sensing Resistor Test 34 9 3 Analog Output Test essen 34 9 4 Ground Fault Performance Test 35 Appendix SE 330 Revision History 36 LIST OF FIGURES FIGURE PAGE 1 Configuration Switches 3 2 Analog Output Connections 6 3 SE 330 Connection Diagram 7 4 SE 330 Outline and Panel Mounting Details 8 5 SE 330 Outline and Surface Mounting Details 9 6 SE IPG5CVR G Weatherproof Cover Outline 10 7 SE IP65CVR G Weatherproof Cover Installation 11 8 ER 600VC Sensing Resistor 12 9 SE MRE 600 Moisture Resistant Enclosure Outline 13 10 ER 600VC Installed in SE MRE 600 14 11 ER 5KV Sensing Resistor eee 15 12 ER 5WP S
24. 7 and 18 Ground fault CT connections and the typical ground fault CT location are shown in Fig 3 For SE 325 replacement applications the existing CT200 current sensor will typically have to be replaced However where replacement is not necessary or possible the CT200 can be connected to either the 1 or 5 A input This CT has a 200 5 current ratio If connected to the 1 A input the ground fault trip level will be a percentage of 40 A See Section 2 1 2 The accuracy of a typical current sensor including the CT200 decreases below 5 of its current rating CT primary current injection testing is recommended to verify trip levels below 5 of the CT primary rating See Section 9 4 Littelfuse Startco current sensors are designed for use at low levels and respond linearly to 2 current rating NOTE The current sensor insulation class is of no consequence if its secondary is grounded and the conductors through its window are insulated for the system voltage Medium voltage systems may require a bushing type CT WA Littelfuse Page 21 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 NOTES DIMENSIONS IN MILLIMETRES INCHES MOUNTING SCREWS M4 OR 8 32 PRESS MOUNTING FEET IN PLACE USING INSTALLATION TOOL PROVIDED RoHS COMPLIANT EN 60044 1 COMPLIANT NOTE 2 2 52 5 SCR
25. A 125 VDC O600 1 18 DIMENSIONS IN MILLIMETRES INCHES a INDICATES CLEARANCE F REQUIRED PANELTHICKNESS 1 0TO 6 0 MOUNTING DETAIL PUSH BUTTON EC 30 0 MINIMUM 40 0 MINIMUM FIGURE 19 RK 332 Remote Indication and Reset 675 2 657 R125 0 049 MAXIMUM NOTES 1 DIMENSIONS IN MILLIMETRES INCHES W uU 100 g g PGA 0520 ANALOG CURRENT METER 1 FRONT REAR FIGURE 20 PGA 0520 Analog Percent Current Meter Littelfuse STARTCO 3 4 ISOLATED GROUND CONNECTION An isolated ground bed can prevent a ground potential rise GPR from being transferred to remote equipment If the G terminals on the sensing resistor and the SE 330 are connected to an isolated ground the SE 330 will be exposed to the GPR If the GPR is greater than the terminal block rating the SE 330 must be isolated from station ground and precautions must be taken with the power supply and the trip contacts See Technical Note RG 1 NGR Monitoring with Isolated Ground Beds at www littelfuse com relayscontrols A configuration which allows an SE 330 to
26. E Switch S2 only affects relay K1 operating mode when is assigned the trip function switch S1 set to TRIP Trip memory is enabled when 1 is set to the fail safe mode regardless of the switch S1 setting 2 1 5 3 GROUND FAULT TRIP LATCH S3 Set switch S3 to select latching or non latching ground fault circuit operation Non latching operation defeats ground fault trip memory See Sections 2 1 5 2 and 2 4 2 1 5 4 RESISTOR FAULT TRIP LATCH S4 Set switch S4 to select latching or non latching resistor fault circuit operation Non latching operation defeats resistor fault trip memory See Sections 2 1 5 2 and 2 4 2 1 5 5 SENSING RESISTOR SELECTION 55 Set switch S5 to the resistance of the sensing resistor For the ER 600VC ER SKV and ER 5WP select 20 For the ER ISKV ER 25KV and ER 35KV select 100 Switch S5 sets the resistor fault trip value and the Vy TRIP LEVEL range See Section 2 1 3 2 1 5 6 FREQUENCY S6 Set switch S6 to 50 or 60 Hz to tune the digital filter to the line frequency of the monitored system 2 1 5 7 UPGRADE MODE S8 The microSDTM card is used for firmware upgrades See Section 4 1 2 for upgrade instructions NOTE An upgrade causes an SE 330 restart and this may cycle the output relays SE 330 Neutral Grounding Resistor Monitor Page4 Rev 10 K 090815 2 1 6 RESISTOR FAULT TRIP TIME The resistor fault trip time can be adjusted from 12 default to 60 seconds using t
27. E setting the ground fault circuit will also trip The Vy TRIP LEVEL range is 20 to 2 000 V with switch S5 in the 20 kQ Vx1 position and the range is 100 to 10 000 V with switch S5 in the 100 Vx5 position Calculate the voltage across the NGR when NGR current is equal to the pick up current of the ground fault circuit Set the Vy TRIP LEVEL at the next largest value See Fig 1 and Section 2 1 5 5 Typical values for 5 15 and 25 A tripping systems are shown in Table 1 For an resistance greater than 2 use a 100 kQ sensing resistor For other systems refer to Monitor Set Point Assistant at www littelfuse com relayscontrols NOTE A resistor fault trip is held off if the ground fault current is above 5 of the CT rating Littelfuse Pages STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 TABLE 1 TYPICAL VALUES FOR TRIPPING SYSTEMS SYSTEM NEUTRAL GROUNDING SENSING RESISTOR GROUND Vy TRIP VOLTAGE RESISTOR FAULT LEVEL LINE LINE TRIP LEVEL CURRENT RESISTANCE MODEL RESISTANCE VOLTS AMPERES OHMS SWITCH S5 AMPERES VOLTS SETTING 480 5 55 ER 600VC 20 1 0 60 600 5 69 ER 600VC 20 1 0 100 2 400 5 277 ER 5KV 20 1 0 340 4 160 5 480 ER 5KV 20 1 0 800 480 15 18 ER 600VC 20 3 0 60 600 15 23 ER 600VC 20 3 0 100 2 400 15 92 ER 5KV 20 3 0 340 4 160 15 160 ER 5KV 20 3 0 800 7 200 15 271 ER 15KV 100 3 0 170x5
28. ETRES INCHES TERMINAL BLOCK SCREWS 6 32 x 0 25 MOUNTING SCREWS M6 OR 0 25 20 THIS DEVICE CAN DISSIPATE 300 WATTS TO MINIMIZE SURFACE TEMPERATURES FOR SYSTEMS ALLOWED TO OPERATE CONTINUOUSLY WITH A GROUND FAULT MOUNT VERTICALLY WITH R amp GTERMINALS DOWN ON REVISION 2 UNITS BASE IS ELECTRICALLY CONNECTED TO TERMINAL G THROUGH JUMPER FROMTERMINAL G TO SCREW THIS CONNECTION MAY BE REMOVED FOR DIELECTRIC STRENGTH TESTING ENSURE THAT THE JUMPER IS INSTALLED AFTER TESTING ON REVISION 0 amp 1 UNITS SCREW IS NOT PRESENT AND BASE IS ELECTRICALLY CONNECTED TO TERMINAL G CERTIFICATIONS NOT SHOWN FIGURE 11 ER 5KV Sensing Resistor TOP VIEW 316 0 12 44 INSERT 0 25 20 UNC STUD F FRONT VIEW MINIMUM DISTANCE r TO ADJACENT OBJECTS MINIMUM CLEARANCE FROM BASE 254 0 10 00 ra 3 355 6 14 00 457 0 18 00 MOUNTING DETAIL Littelfuse STARTCO RATINGS MAXIMUM VOLTAGE 2 500 Vac MAXIMUM CURRENT 125 mA RESISTANCE THERMAL TORQUE TERMINAL N 3 LOCATIONS 10 32 INSERT 5 6 N m 50 in Ib SE 330 Neutral Grounding Resistor Monitor 381 0 21 0 15 00 12 ALTERNATE NEUTRAL CONNECTION 12 0 47 NEUTRAL CONNECTION OTHERS 9 0 N m 80 in Ib FA Littelfuse STARTCO NOTE 2 AND 5 NOTES DIMENSIONS IN MILLIMETRE
29. EWS MOUNTING DETAIL 25 0 30 0 0 98 1 18 pA ic EFCT 1 EARTH FAULT CT ULATION CLASS A EA Littelfuse LOS TAHTCO 5 0 0 20 AA gt Z RECESSED FOR ASS CONDITIONER Pe 8 mm HEX NUT MM u 1 0 0 04 DEEP 138 0 MAX FIGURE 16 EFCT 1 Ground Fault Current Sensor WA Littelfuse Page 22 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 20 5 0 81 f I 4 PECES 1 N ie TOP MOUNTING DETAIL 25 0 30 0 Hose st us SCREWS SE CS30 70 Qu FA Littelfuse STARTCO 138 0 MAX 5 0 0 20 RECESSED FOR 8 mm HEX NUT 1 0 0 04 DEEP NOTES MOUNTING FOOT A INSTALLATION DIMENSIONS IN MILLIMETRES INCHES lt TOOL lt PRESS MOUNTING FEET IN PLACE USING gt INSTALLATION TOOL PROVIDED DETAIL A 3 MOUNTING SCREWS M4 OR 8 32 RoHS COMPLIANT 5 EN 60044 1 COMPLIANT DETAIL A FIGURE 17 SE CS30 70 Ground Fault Current Sensor WA Littelfuse Page 23 STAR
30. LATE I I 1 I I I 1 I I I 1 I I 1 I ENSURETHAT RETAINERS AGAINST MONITOR BODY ANDTIGHTEN RETAINER SCREWS REMOVAL 1 LOOSEN RETAINER SCREWS SLIDE RETAINERS AWAY FROM MONITOR BODY ANDTIGHTEN RETAINER SCREWS 2 PULL MONITOR FORWARD MOUNTING DETAIL FIGURE 5 SE 330 Outline and Surface Mounting Details WA Littelfuse Page 10 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 TO PREVENT UNAUTHORIZED ENTRY 1 USE WIRE SEALTHROUGH HOLES IN WEATHERPROOF COVER ASSEMBLY OR 2 SECURE WITHTHE PLASTICTHREAD FORMING SCREW SUPPLIED IN KIT TOP VIEW HOLE FOR SEAL WIRE 1270 5 00 FRONT VIEW SIDE VIEW NOTES 1 DIMENSIONS SHOWN IN MILLIMETRES INCHES 2 SHOWN WITH WEATHERPROOF SNAPS CLOSED 3 REFERTO PANEL MOUNTING CUTOUT FIGURE 4 FOR PANEL MOUNTING DETAIL FIGURE 6 SE IP65CVR G Weatherproof Cover Outline Page 11 SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 Littelfuse STARTCO INSTALL O RING INTO GROOVE INTHE REAR OF WEATHERPROOF WINDOW INSERTTHE SE 330 THROUGH OPENING OF THE WEATHERPROOF WINDOW UNTIL IT IS SECURELY NES
31. MRE 600 Moisture Resistant Enclosure Outline WA Littelfuse Bisel STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 MOUNTING SCREWS 4 LOCATIONS NOTE 4 ER 600VC SENSING RESISTOR 600 VAC MAX EA Littelfuse STARTCO ENCLOSURE TOP VIEW COVER INSIDE VIEW COVER REMOVED ASSEMBLY INSTRUCTIONS DRILL HOLE FOR ENCLOSURE WIRE ENTRY USE LIQUID TIGHT FITTING REMOVE NYLON NUTS AND WASHERS INSERT ER 600VC INTO ENCLOSURE REPLACE NUTS AND WASHERS ATTACH GROUND WIRE FROM ENCLOSURETO COVER AND TO ER 600VC TERMINAL G MOUNT SE MRE 600 IN PLACE USING M6 OR 0 25 20 COMPLETE OTHER WIRING AND REPLACE COVER FIGURE 10 ER 600VC Installed in SE MRE 600 Littelfuse STARTCO RATINGS MAXIMUM VOLTAGE 2 500 Vac MAXIMUM CURRENT 125 mA RESISTANCE THERMAL CONTINUOUS TORQUE TERMINAL N 3 LOCATIONS SE 330 Neutral Grounding Resistor Monitor 381 0 210 15 00 0 83 ALTERNATE NEUTRAL CONNECTION 12 0 0 47 NEUTRAL CONNECTION TK 10 32 INSERT 5 6 N m 50 in Ib OTHERS 9 0 N m 80 in Ib ER 5KV SENSING RESISTOR FA Littelfuse STARTCO Page 15 10 090815 0 25 20 UNC THREADED INSERT 10 32THREADED E NOTES 5 amp 6 SIDE VIEW NOTES DIMENSIONS IN MILLIM
32. RESISTANCE GROUNDED SYSTEMS A high resistance grounded system uses a neutral grounding resistor NGR with a low let through current to limit ground fault current This is an improvement over low resistance or solidly grounded systems because in those systems a ground fault flash hazard exists and a ground fault can result in substantial point of fault damage High resistance grounding eliminates these problems and modern ground fault protection operates reliably at low current levels Furthermore the probability of an arc flash incident is significantly reduced in a high resistance grounded system NGR selection depends on system charging current and whether the system is an alarm only or a tripping system Alarm only systems are usually restricted to system voltages up to 5 kV with NGR let through currents of 5 A or less Occasionally alarm only systems up to 15 kV and up to 10 A are used however they are not common because a ground fault on such a system tends to escalate to a phase to phase fault before the ground fault can be located and cleared Consult CEC 10 1102 NEC 250 36 and NEC 250 186 for application details System charging current is the capacitive current that flows to ground when a bolted ground fault occurs This current can be calculated or measured For small systems the magnitude of charging current can be conservatively estimated as A per 1 000 kVA on low voltage systems and 1 A per 1 000 on medium voltage
33. S INCHES TERMINALBLOCK SCREWS 6 32 x 0 25 CABLE ACCESS OPENING IS 1 2 NPT USE A LIQUID TIGHT FITTING FOR CABLE ENTRY MOUNTING SCREWS M6 OR 0 25 20 THIS DEVICE CAN DISSIPATE 300 WATTS TO MINIMIZE SURFACE TEMPERATURES FOR SYSTEMS ALLOWED TO OPERATE CONTINUOUSLY WITH A GROUND FAULT MOUNT VERTICALLY WITH R amp GTERMINALS DOWN BASE IS ELECTRICALLY CONNECTED TOTERMINAL G THROUGH JUMPER FROMTERMINAL GTO SCREW THIS CONNECTION MAY BE REMOVED FOR DIELECTRIC STRENGTH TESTING ENSURE THAT THE JUMPER IS INSTALLED AFTER TESTING CERTIFICATIONS NOT SHOWN FIGURE 12 ER 5WP Sensing Resistor TOP VIEW 316 0 12 44 Page 16 Rev 10 K 090815 0 25 20 UNC THREADED INSERT 10 32 THREADED INSERT 0 25 20 UNC STUD e FRONT VIEW MINIMUM DISTANCE Pa TO ADJACENT OBJECTS MINIMUM CLEARANCE FROM BASE 254 0 10 00 x 3 355 6 14 00 457 0 18 00 MOUNTING DETAIL WA Littelfuse Page 17 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 RATINGS MAXIMUM VOLTAGE 8 400 Vac MAXIMUM CURRENT 84 mA RESISTANCE 100 THERMAL ER 15KV CAUTION HIGH VOLTAGE Ec ul ATTENTION HAUTE 1 MINUTE ON VOLTAGE YAT TERMINAL M RISES N H 120 MINUTES tA OFF 1 900 Vac CONTINUOUS TORQUE ir TERMINAL N 9 0 N m 80 in Ib 0 25 20 BINDING HEAD
34. TCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 SJ 1 V 0 rJ TOP MOUNTING DETAIL 25 0 26 5 0 98 1 04 110 0 MAX mr SE CS30 26 CURRENT SENSOR Qu FA Littelfuse STARTCO 4 0 0 16 RECESSED FOR 7 mm HEX NUT 3 0 0 12 DEEP NOTES 0 DIMENSIONS IN MILLIMETRES INCHES PRESS MOUNTING FEET IN PLACE USING INSTALLATION TOOL PROVIDED DETAIL A 3 MOUNTING FOOT MOUNTING SCREWS M4 OR 8 32 22 INSTALLATION Su RoHS COMPLIANT EN 60044 1 COMPLIANT DETAIL A SE CS30 26 SHOWN FIGURE 18 EFCT 26 and SE CS30 26 Ground Fault Current Sensors WA Littelfuse Page 24 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 30 0 1 18 RESET RESISTOR FAULT GROUND FAULT k LEGEND anc PLATE NOTE 4 ENT N 22 2 0 87 DIA 1 1 36 6 75 LEGEND PLATES NOTES PILOT LIGHTS 1 TWO RED LED LIGHTS 24 120 VAC DC NOT POLARITY SENSITIVE YELLOW PUSH BUTTON 3A 240 VAC A600 0 5
35. TED TO THE BACK OF THE DARK GREY PVC PANEL INSTALL O RING INTO THE GROOVE IN THE REAR FRONT PANEL OF WEATHERPROOF WINDOW ASSEMBLY DETAILS NOT SHOWN INSERT ASSEMBLY INTO PANEL AND FASTEN WITH THE HARDWARE PROVIDED WITH THE SE 330 FIGURE 7 SE IP65CVR G Weatherproof Cover Installation Littelfuse STARTCO 3 2 SENSING RESISTOR Outline and mounting details for the ER 600VC ER 5KV ER 5WP 15 ER 25KV and ER 35KV sensing resistors are shown in Figs 8 11 12 13 14 and 15 Install the NGR and the sensing resistor near the transformer or generator When installed outdoors a sensing resistor must be installed in a suitable enclosure An optional SE MRE 600 Moisture Resistant Enclosure is available for applications which may expose an ER 600VC to moisture See Figs 9 and 10 The weather protected ER 5WP shown in Fig 12 is an ER 5KV with moisture resistant terminal covers Use an ER 5WP in applications in which it might be exposed to moisture 15 ER 25KV and ER 35KV include moisture resistant terminal covers Use suitable water tight fittings Ground sensing resistor terminal G Pass the sensing resistor to neutral conductor and the NGR to neutral conductor through the ground fault CT window as shown in Fig 3 Separately connect sensing resistor terminal N and the NGR to the neutral to include neutral connections in the monitored loop Alternately if the NGR connection to system neut
36. TOR TWISTED CABLE REQUIRED SHIELDED RECOMMENDED CT CONNECTION IS NOT POLARITY SENSITIVE CONNECT CONTACTS K1 K2 K3 AND K4 AS REQUIRED FOR PROTECTION INDICATION AND CONTROL 14 EXTERNAL LIGHTS AND SWITCHES NOT INCLUDED WITH SE 330 15 SELF POWERED 4 20 mA OUTPUT 16 TYPICALTRIPPING SYSTEM 17 GROUND CURRENT SENSOR ATTERMINAL 11 ONLY Littelfuse Paces STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 132 0 5 20 _ PANELTHICKNESS 1 6 0 06 TO 4 8 0 19 P LITTELFUSE STARTCO NEUTRAL GROUNDING RESISTOR SE 330 MONITOR GROUND RESISTOR FAULT FAULT UNIT I PC HEAUTHY K Tous TRIP TRIP e e e Nc 14 E m s RESET CALIBRATED we e PULSE ENABLE 012000000000 7 1B spea e RELAY K1 ANALOG OUTPUT LO ov 21 O ATTENTION DISENGAGE CAPTIVE RETAINING SCREWS BEFORE REMOVING PLUG IN TERMINAL BLOCKS Sessa R sensinc RESISTOR zad GROUND FAULT 25 Ket 26 gt RESISTOR FAULT c 59996 sis o9 2loooooopS
37. UND FAULT PERFORMANCE TEST To meet the requirements of the National Electrical Code NEC as applicable the overall ground fault protection system requires a performance test when first installed A written record of the performance test is to be retained by those in charge of the electrical f installation in order to make it available to the authority having jurisdiction A test record form is provided for TO SENSING recording the date and the final results of the TERMINAEN performance tests The following ground fault system tests are to be conducted by qualified personnel N a USING SE 400 NEUTRAL a Evaluate the interconnected system in accordance with the overall equipment manufacturer s detailed REMOTE instructions b USING SE 100T b Verify proper installation of the ground fault current sensor Ensure the cables pass through the ground fault current sensor window This check can be done visually with knowledge of the circuit The connection of the current sensor secondary to the SE 330 is not polarity sensitive NEUTRAL TO SE 330 1 TO SENSING Verify that the system is correctly grounded and that TERMINAL N alternate ground paths do not exist that bypass the c current sensor High voltage testers and resistance 2 me bridges can be used to determine the existence of REMOTE SE 100T alternate ground paths
38. VISION HISTORY HARDWARE REVISION 15 RTC circuit updated HARDWARE REVISION 14 Added CE and C Tick compliance HARDWARE REVISION 13 Reduced ESD sensitivity of front panel dials HARDWARE REVISION 12 Improved Fiber Ethernet support HARDWARE REVISION 11 Reduced ESD sensitivity of USB and SD card connectors HARDWARE REVISION 10A Update to RTC circuit HARDWARE REVISION 10 Updated SE 330 platform to include USB and microSD interfaces programmable trip level MEM feature and ability to add future options Real time clock added Added dual cable and fiber Ethernet ports FIRMWARE REVISION HISTORY FIRMWARE REVISION 2 52 Improved compatibility with Internet Explorer web browser FIRMWARE REVISION 2 50 Added support for adjustable resistor fault trip level Web page functionality re enabled for Ethernet options FIRMWARE REVISION 2 40 Added support for geo magnetic filter Added support for 12 to 60 s resistor fault trip time Improved log file descriptions IEC 61850 GOOSE network input support now always enabled Improved compatibility for Modbus TCP Web page disabled for Ethernet options This will be enabled in a future firmware release IP setting changes for Ethernet options now require power cycle to take effect FIRMWARE REVISION 2 31 SD Card and USB diagnostic events no longer cause a trip FIRMWARE REVISION 2 30 Remote calibration feature added FIRMWARE REVISION 2 20 Added support for EtherNet IP protocol IED name now repo
39. WA Littelfuse STARTCO 3714 Kinnear Place Saskatoon SK Canada 57 6 Ph 306 373 5505 306 374 2245 www littelfuse com relayscontrols SE 330 MANUAL NEUTRAL GROUNDING RESISTOR MONITOR REVISION 10 K 090815 LITTELFUSE STARTCO NEUTRAL GROUNDING RESISTOR SE 330 MONITOR GROUND FAULT TRIP RELAY K1 GF TRIP LEVEL CT RATING RESISTOR FAULT TRIP Vn TRIP LEVEL 20 KO 100 st Vio PULSE PERIOD s FA Littelfuse Copyright 2015 Littelfuse Startco All rights reserved Document Number PM 1200 EN Printed in Canada Littelfuse Page i STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 This page intentionally left blank Littelfuse STARTCO TABLE OF CONTENTS SECTION PAGE 1 General cepe 1 1 1 Modern Resistance Grounded Systems 1 1 2 SE 330 NGR Monitoring 1 2 Operation n 2 221 Sethi 2 2 1 1 GF Trip Time 2 2 1 2 GF Trip Level 2 2 1 3 Vg Trip Level sentes 2 2 1 4 Pulse Period Adjustment 3 2 1 5 Configuration Settings 3 2 1 5 1 Relay Function S1 4 2 1 5 2 Trip Relay Mode and Trip Memory Mode S2 4 2 1 5 3 Ground Fault Trip Latch S3 4 2 1 5 4 Resistor Fault Trip
40. be connected to station ground is shown in Fig 21 The SE 330 monitors the series combination of the NGR and the two ground beds This configuration is acceptable provided the series resistance of the NGR and the ground beds is within the NGR calibration range and ground bed resistance changes remain within the trip range See Section 6 1 ER SERIES STATION SENSING TRIP CIRCUIT RESISTOR R G STATION CONTROL SUPPLY 2 4 n STATION GROUND BUS STATION ISOLATED GROUND BED GROUND BED LEE REMOTE GROUND FIGURE 21 Simplified Isolated Ground Connection 3 5 PULSING CONNECTION Set switch 51 to PULSING and use an external switch as shown in Fig 22 to use relay K1 to control a pulsing contactor Relays K2 and K3 can be used for tripping and can be configured in the fail safe or non fail safe mode using the SE MON330 software SE 330 Neutral Grounding Resistor Monitor Page 25 Rev 10 K 090815 TO SENSING RESISTOR TERMINAL N ENABLE NOTES 1 ALTERNATE NGR CONFIGURATION 2 SET SWITCH S1TO K1 PULSING FIGURE 22 Simplified Pulsing Connection Littelfuse STARTCO 4 DATA INTERFACES 4 1 SD CARD The SE 330 supports microSD data storage The microSD card port is located on the front panel just below the USB port The microSD card is used for long term
41. data logging of measured values and for firmware upgrades 4 1 1 DATALOGGING When a microSD card is installed the SE 330 looks for a directory called Datalogging If this directory exists data logging will automatically start after the card is indexed indexing may take several minutes depending on the size of the card and the number of files The log is updated every two seconds and it includes measured values configuration parameters and trip status A new log file is created at the start of each day If previous log files exist and the microSD card has less than 20 MB of free space the oldest datalogging file will automatically be deleted before a new file is created The red DIAGNOSTIC LED may indicate an SD Card error See Section 5 Approximately 3 GB of data is generated per year of logging 4 1 2 FIRMWARE UPGRADE Firmware upgrades are performed using microSD card in conjunction with configuration switch S8 See Section 2 1 5 7 The SE Flash software is not required To upgrade the SE 330 firmware insert a microSDTM card containing the firmware upgrade file S19 format in the root directory of the SD card and set switch S8 to UPGRADE within 30 s of card installation If S8 is switched to UPGRADE after 30 s the upgrade process will not occur If the microSD card is inserted after S8 is switched to UPGRADE switch S8 to RUN and then back to UPGRADE The SE 330 evaluates firmware upgrade files found in the r
42. del revision 04 or less e When the trip level is set to MEM the ground fault trip setting 1s defined by an internal non volatile memory variable Range is 2 to 100 in 1 increments of the CT primary rating e Indication relays can be set to fail safe or non fail safe e number of trip records has been increased to 100 and includes date and time stamping e microSD card interface can be used for long term data logging and firmware updates microSDTM card and a microSD to SD adapter is included See Section 4 1 e For ease of connection to new devices the RS 232 interface has been replaced by a Mini B USB port e Dual Ethernet ports are available with support for fiber optic and RJ45 interfaces IEC 61850 protocol has been added 2 OPERATION 2 1 SETTINGS 2 1 1 GF TRIP TIME GF TRIP TIME definite time is adjustable from 0 1 to 10 0 seconds Time coordinated ground fault protection requires this setting to be longer than the trip times of downstream ground fault devices A trip time accumulator provides a ground fault memory function for detection of intermittent faults The accumulated time increases when a ground fault is detected and decreases when a ground fault is not detected A trip will eventually occur when the time for fault current above the trip level is greater than the time for fault current below the trip level SE 330 Neutral Grounding Resistor Monitor Page 2 Rev 10 090815
43. disabled if remote reset terminals 15 and 16 are connected Replace shorted remote reset switch or issue Reset command from the communications network UNIT HEALTHY relay K4 momentarily changes state Occurs when processor is reset C4 Littelfuse SE 330 Neutral Grounding Resistor Monitor Rev 1 Tim STARTCO s PROBLEM DIAGNOSTIC LED SOLUTION FLASH CODE No analog output current The output at terminals 19 and 20 requires a voltage source See Fig 2 for analog output connections See Section 9 3 for the analog output tests NOTES L Jong pause S short flash When LED is on corresponding indication relay is energized when in the non fail safe mode or de energized when in the fail safe mode Littelfuse STARTCO 6 TECHNICAL SPECIFICATIONS 6 1 SE 330 Supply Option 0 30 VA 120 to 240 Vac 10 45 50 60 Hz 20 W 110 to 250 Vdc 10 25 Option 2 eene 20 W 48 Vdc 50 25 35 VA 48 Vac 10 45 50 60 Hz Power Up Time 3 s at 120 Vac AC Measurements Discrete Fourier Transform 16 samples per cycle 50 or 60 Hz Resistor Fault Circuit Neutral To Ground Voltage Trip Levels ER 600VC or 5 20 60 100 130 170 200 340 800 1 200 1 700 2 000 Vac ER 15KV to ER 35KV 100 300 500 650 850 1 000 1 700 4 000 6 000 8 500 10
44. e SE 330 and the ER sensing resistor The Vy TRIP LEVEL is the trip voltage at terminal N not terminal R 9 1 RESISTOR FAULT TESTS Perform tests with system de energized and supply voltage applied to the SE 330 9 1 1 CALIBRATION AND OPEN TEST Test Equipment 20 kQ and 100 kO 1 4 watt 1 calibration resistors calibration resistors are supplied with SE 330 Procedure Remove connections to terminals 6 and 7 Connect the 20 kQ resistor to terminals 6 and 7 Set switch S5 to the 20 kQ position Perform calibration as per Section 2 2 The CALIBRATED LED should be on Press RESET Remove the 20 kQ resistor and wait for the resistor fault trip time PASS The SE 330 should trip on resistor fault Connect the 100 kQ resistor to terminals 6 and 7 Set switch S5 to the 100 kQ position Perform calibration as per Section 2 2 The CALIBRATED LED should be on Press RESET e Remove the 100 kQ resistor and wait for the resistor fault trip time PASS The SE 330 should trip on resistor fault NOTE Resistor fault trip reset can take up to one second 9 1 2 VOLTAGE TEST Test Equipment 0 to 120 Vac voltage source multimeter and ER sensing resistor Procedure e Connect the ER sensing resistor to the SE 330 and calibrate the SE 330 e Disconnect the wire from sensing resistor terminal N A resistor fault trip will occur e Set the voltage source to 0 V Connect the voltage source between sensing r
45. ensing Resistor 16 13 ER I5KV Sensing Resistor 17 14 ER 25KV Sensing Resistor 18 15 ER 35KV Sensing Resistor 19 16 EFCT 1 Ground Fault Current 21 17 SE CS30 70 Ground Fault Current Sensor nep ee B ERES 22 18 26 and SE CS30 26 Ground Fault Current Sensors 23 19 RK 332 Remote Indication and Reset 24 20 PGA 0520 Analog Percent Current Meter 24 21 Simplified Isolated Ground Connection 25 22 Simplified Pulsing Connection 25 23 Ground Fault Test Circuits 35 LIST OF TABLES TABLE PAGE Typical Values for Tripping Systems 3 2 Ground Fault Trip Levels for Selected CT s 3 3 Ground Fault Test Record 35 DISCLAIMER Specifications are subject to change without notice Littelfuse Startco is not liable for contingent consequential damages or for expenses sustained as a result of incorrect application incorrect adjustment or a malfunction WA Littelfuse Page ii STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 This page intentionally left blank Littelfuse STARTCO 1 GENERAL 1 1 MODERN
46. esistor N and G terminals Set the Vy TRIP LEVEL VAC to 20 Press RESET The RESISTOR FAULT TRIP LED should be off Increase the test voltage to 25 Vac for 20 kQ sensors or 120 Vac for 100 kQ sensors and wait for the resistor fault trip time PASS The SE 330 should trip on RESISTOR FAULT A time delayed ground fault trip follows the resistor fault trip if neutral voltage persists after the resistor fault For legacy units with firmware revision 6 or less this does not apply 9 2 SENSING RESISTOR TEST Test Equipment Multimeter Procedure e Disconnect the sensing resistor e Measure the resistance between sensing resistor terminals RandN PASS Resistance should be between 19 6 and 20 4 kQ for 20 kQ sensing resistors Resistance should be between 98 and 102 for 100 kQ sensing resistors e Measure the resistance between sensing resistor terminals R and G in both directions PASS Resistance should be greater than 10 MQ in both directions 9 3 ANALOG OUTPUT TEST Test Equipment Multimeter with a mAdc scale Procedure Connect the 4 20 mA output as a self powered output as shown in Fig 3 Measure the current from terminal 20 to terminal 21 PASS With no CT current the analog output should be 4 mA Output is linear to 20 mA Output is 20 mA when CT primary current is equal to the CT primary rating WA Littelfuse Page 35 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 9 4 GRO
47. f POWER LED remains off return unit for repair POWER LED flashes A power supply overload has occurred Cycle supply voltage If problem persists consult Littelfuse Startco Calibration Error Trip DIAGNOSTIC LED flash code IL 1S 1L The total resistance of the NGR and sensing resistor circuit is outside the calibration range Verify that switch S5 is set to match the resistance of the sensing resistor check the resistance of the NGR and verify the sensing resistor circuit See Section 9 2 for sensing resistor tests Repeat the calibration procedure after the open or shorted condition has been corrected GF LED No Change RF LED ON K1 Trip Remote Trip DIAGNOSTIC LED flash code A D Converter Error Trip DIAGNOSTIC LED flash code IL 2S 1L IL 4S 1L The SE 330 was tripped by a signal from network communications Press RESET to clear the trip GF LED ON RF LED ON K1 Trip An A D converter error was detected Press RESET to clear the trip If the problem persists consult Littelfuse Startco GF LED No Change RF LED ON K1 Trip SD Card DIAGNOSTIC LED flash code Watchdog Trip DIAGNOSTIC LED flash code IL 5S 1L IL 6S 1L SD Card is full or a write error occurred Delete files or use a different microSD card GF LED No Change RF LED No Change K1 No Change If this diagnostic was caused during an attempt to upgrade the firmware follow this alternate process remove supp
48. he SE MON330 software or via network communications 2 1 7 RESISTOR FAULT TRIP LEVEL The resistor fault trip level can be adjusted using the SE MON330 software or via network communications See Section 6 1 2 1 8 GEO MAGNETIC FILTER A low frequency ground current can be caused by the Earth s magnetic field and from charged clouds passing overhead during a thunderstorm In some rare conditions this can cause a false resistor fault trip Enabling the geo magnetic filter and increasing the resistor fault trip time can help counteract these effects A trip time of 30 seconds is recommended when the geo magnetic filter is enabled The geo magnetic filter is disabled by default but can be enabled using the SE MON330 software or via network communications 2 2 CALIBRATION The SE 330 measures the resistance change of the NGR relative to the NGR resistance value determined at the time of calibration When the resistance change 1s greater than a threshold amount 500 Q for 20 kQ systems 2 500 Q for 100 kQ systems a resistor fault trip occurs Calibrate the SE 330 on new installations if the NGR is changed or if the sensing resistor is changed NOTE If the SE 330 is not calibrated and is supplied from the load side of the breaker non fail safe mode calibrate within the resistor fault trip time after power up or it may trip and interrupt its supply See Section 2 1 6 The CALIBRATION button is located behind the access c
49. he trip accumulator to initialize WA Littelfuse Page 36 STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 APPENDIX A SE 330 REVISION HISTORY HARDWARE REVISION DATE 2 REVISION NUMBER FIRMWARE REVISION ON PRODUCT LABEL September 8 2015 10 K 090815 2 52 June 22 2015 10 J 062215 2 50 May 20 2015 10 1 052015 2 40 March 3 2015 10 H 030315 July 7 2014 10 G 070714 14 5 April 14 2014 10 F 041414 13 12 2 20 January 8 2014 10 E 010814 T November 29 2013 10 D 112913 2 10 October 8 2013 10 C 100813 10A 2 08 September 12 2013 10 B 091213 2 07 August 30 2013 10 A 083013 10 2 07 MANUAL REVISION HISTORY REVISION 10 K 090815 SECTION 4 Section 4 1 2 updated SECTION 5 SD card diagnostic troubleshooting updated REVISION 10 J 062215 SECTION 2 Section 2 1 7 added SECTION 4 SD Card approximate yearly data logging usage updated SE MON330 software version updated SECTION 6 Resistor fault trip level ranges added REVISION 10 030315 SECTION 4 SD Card storage capacity updated SECTION 6 SD Card storage capacity specification updated REVISION 10 H 030315 SECTION 2 Sections 2 1 6 and 2 1 7 added SECTION 4 Section 4 2 new features added SECTION 6 Resistor fault circuit trip time updated REVISION 10 G 070714 SECTION 6 Added CE C Tick and FCC information REVISION 10 F 041414 APPENDIX A Hardware revision updated Littelfuse STARTCO SE
50. ielded cable included EFCT 26 Current Sensor 5 A primary rating 26 mm 1 0 Window 6 m 19 5 of 22 AWG 3 3 mm shielded cable included SE CS10 2 5 renra Current Sensor 30 A primary rating 63 mm 2 57 window Page 33 Rev 10 K 090815 SE CS30 26 Current Sensor 30 A primary rating 26 mm 1 0 window SE CS30 70 Current Sensor 30 A primary rating 70 mm 2 7 window C T2005 u u uuu oss Current Sensor 200 A primary rating 56 mm 2 2 window 58 101 Current Sensor 100 A primary rating 40 mm 1 6 window 58 151 Current Sensor 150 A primary rating 40 mm 1 6 window 58 500 Current Sensor 50 A primary rating 40 mm 1 6 window 78 301 Current Sensor 300 A primary rating 64 mm 2 5 window 78 401 Current Sensor 400 A primary rating 64 mm 2 5 window Accessories RK 332 Remote Indication and Reset includes two 120 V pilot lights a reset push button and legend plates SE IP65CVR G Hinged transparent cover IP65 SE MRE 600 Moisture resistant enclosure for ER 600VC PGA 0520 a a asss Percent Analog Meter SE 330 SMA Surface Moun
51. ly from SE 330 insert a microSD card containing the firmware upgrade file in the root directory of the SD card power on the SE 330 set switch S8 to UPGRADE within 30 s the upgrade should continue as described in Section 4 1 2 A watchdog trip results in a processor reset During reset UNIT HEALTHY relay K4 will be de energized After a reset UNIT HEALTHY relay K4 will be energized Press RESET to clear the trip If the problem persists consult Littelfuse Startco GF LED ON RF LED ON K1 Trip CPU Trip DIAGNOSTIC LED flash code 11 78 11 The CPU has detected a system fault Press RESET to clear the trip GF LED ON RF LED ON K1 Trip Non Volatile Memory Error Trip DIAGNOSTIC LED flash code 11 85 11 An error was detected in the Non Volatile Memory Press RESET to clear the trip If the problem persists consult Littelfuse Startco GF LED ON RF LED ON KI Trip SD Upgrade Error DIAGNOSTIC LED flash code IL 9S 1L An error occurred during the flash memory upgrade procedure Ensure that the firmware upgrade file is correct or use a different microSD card GF LED No Change RF LED No Change K1 No Change DIAGNOSTIC LED Solid Red SE 330 processor failed to start Cycle supply If problem persists consult Littelfuse Startco K1 De energized Pressing RESET does not clear trips Trip condition is still present Locate and correct The RESET button is
52. n be viewed and adjusted e Ground fault trip setting when front panel GF Trip Level is set to MEM K2 ground fault relay output operating mode K3 resistor fault relay output operating mode Clock settings Trip records can be cleared Remote calibration Resistor fault trip time Resistor fault trip level Geo magnetic filter Ensure the real time clock is set to the correct time prior to normal operation Trip records and on board datalogging information include date and time readings from the clock Refer to the SE MON330 software help file 4 3 NETWORK COMMUNICATIONS The optional communications interfaces include a single CAN port and dual Ethernet ports supporting cable fiber or both cable and fiber Protocols include DeviceNet over CAN ordering option 1 EtherNet IP over cable or fiber ordering options 3 4 and 5 e Modbus TCP over cable or fiber ordering options 3 4 and 5 e 61850 over cable or fiber ordering options 6 7 and 8 Refer to the appropriate SE 330 communications interface manual for details 9 Uses the plug in style SC connector Littelfuse STARTCO 5 TROUBLESHOOTING SE 330 Neutral Grounding Resistor Monitor Page 27 Rev 10 K 090815 PROBLEM DIAGNOSTIC LED FLASH CODE SOLUTION POWER LED off Check if supply voltage is present on terminals 1 and 2 If present an overvoltage may have caused the power supply to shutdown Cycle supply voltage I
53. oot directory of the microSD card and uses the first valid file Ensure that the DIAGNOSTIC LED is off before beginning the firmware upgrade process The red DIAGNOSTIC LED blinks rapidly while the firmware upgrade is running and the SE 330 will restart when the upgrade is complete If the upgrade is not successful the DIAGNOSTIC LED will indicate an SD Upgrade Error See Section 5 Set switch S8 back to RUN for normal operation If a firmware upgrade fails the existing firmware is not overwritten A record of the upgrade can be found upgrade log lt SN gt txt the microSD card This file is updated each time an upgrade is performed SE 330 Neutral Grounding Resistor Monitor NOTE The included microSD card has a temperature rating of 25 to 85 C 13 to 140 F For applications colder than 25 C 13 F use an Industrial Grade microSD card NOTE The maximum recommended microSD card storage capacity is 4 GB Page 26 Rev 10 K 090815 4 2 USB INTERFACE Use the SE MON330 software version 3 5 or newer to access set points measured values and trip records through the mini B USB interface located on the front panel The following data can be viewed Front panel and configuration switch settings Neutral voltage and neutral current Resistance change from the calibrated value Trip status Trip records 100 date and time stamped Firmware version and serial number The following values ca
54. over on the front panel and it is recessed to prevent inadvertent activation NOTE Calibration must be performed with the SE 330 connected to the sensing resistor and NGR of the installed system To calibrate press and hold the CALIBRATION button until the green CALIBRATED LED turns off and returns to on if the LED is already off press and hold until the LED turns on Calibration takes approximately two seconds If calibration is not successful a resistor fault trip occurs the RESISTOR FAULT TRIP LED will be on the CALIBRATED LED will be off and the DIAGNOSTIC LED will flash the calibration error code See Section 2 8 The SE 330 may be calibrated remotely using the SE MON330 software with the USB interface or the communications options Littelfuse STARTCO If latching resistor fault switch S4 is selected the calibration error code flashes until RESET 1s pressed even if the CALIBRATED LED is on The calibration value is stored in non volatile memory 2 3 PULSING OPERATION If switch S1 is set to PULSING pulsing occurs when terminal 16 is connected to terminal 17 Relay K1 operates at a 50 duty cycle and cycle time is adjustable from 1 0 to 3 0 seconds When terminals 16 and 17 are not connected K1 is not energized and its contact is open Relay K1 can be used to control a contactor rated for use at the line to neutral voltage The contactor causes changes in neutral to ground resistance b
55. ral need not be monitored connect terminal N to the NGR neutral terminal RATINGS MAXIMUM VOLTAGE 600Vac MAXIMUM CURRENT 30 mA RESISTANCE 20 THERMAL 600 Vac 6 MINUTES ON 60 MINUTES OFF 420 Vac CONTINUOUS 40 0 SE 330 Neutral Grounding Resistor Monitor Page 12 Rev 10 K 090815 If a ground fault in the sensing resistor conductor is unlikely a minimal loss of protection will result if it does not pass through the ground fault CT window See Note 3 in Fig 3 NOTE Voltage at terminal N rises to line to neutral voltage when a ground fault occurs The same clearances are required for sensing resistors as for NGR s NOTE A parallel ground path created by moisture can result in a false resistor fault trip Moisture sources include wind driven rain or snow and condensation Sensing resistor terminal R and its connection to SE 330 terminal R including interposing terminal blocks must remain dry NOTE The neutral to sensing resistor terminal N connection is not a neutral conductor as defined in Canadian Electrical Code Section 10 1108 and National Electrical Code Section 250 36 B It is not required to be 8 AWG 8 36 mm or larger Since current through this conductor is always less than 250 mA a 14 AWG 2 08 mm conductor insulated to the system voltage is more than sufficient 1 57 Minutes Of a GOD Var 600 Vac 50 60 Hz 6 Medos On 60
56. rotection and ensure a stable system not subject to ferroresonance 1 2 SE 330 NGR MONITORING The SE 330 is a microprocessor based neutral grounding resistor monitor that detects NGR failures and ground faults in resistance grounded systems The SE 330 measures NGR resistance NGR current and transformer or generator neutral to ground voltage The components required to monitor an NGR are an SE 330 a 20 or 100 ER series sensing resistor and a current transformer CT Power circuit elements other than neutral connected NGR s that purposefully connect the power system to ground are often not compatible with SE 330 monitoring These elements include single phase grounding transformers grounded wye primary potential transformers PT s and grounded wye primary power transformers The SE 330 continuously measures NGR resistance in an unfaulted system It will trip on resistor fault if NGR resistance varies from its calibrated value When a ground fault occurs voltage is present on the neutral and NGR current will flow if the NGR is healthy The SE 330 will trip on ground fault if fault current exceeds the GF TRIP LEVEL setting for an interval equal to the GF TRIP TIME setting However if the NGR fails open during a ground fault it is possible for fault resistance to satisfy the NGR resistance measurement To detect this double fault condition the SE 330 measures neutral voltage If neutral voltage exceeds the Vy TRIP
57. rted correctly through IEC 61850 interface EtherNet IP and Modbus communications card LED status updated Hardware version viewable in the SE MON330 software and through the Modbus and IEC 61850 servers FIRMWARE REVISION 2 10 Added support for IEC 61850 and DeviceNet protocols FIRMWARE REVISION 2 08 Added support for communications options FIRMWARE REVISION 2 07 Updated firmware to include USB and microSD interfaces datalogging and firmware update via microSD K2 and K3 indication relays can be configured for fail safe or non fail safe operation Trip records increased to 100 with date and time stamping
58. ss FA Littelfuse m M FRONT VIEW SIDE VIEW REAR VIEW NOTES 1 DIMENSIONS IN MILLIMETRES INCHES R 4 8 0 19 MAXIMUM 22 A 435 0 187 DIA 4 LOCATIONS PANELMOUNT CUTOUT FIGURE 4 SE 330 Outline and Panel Mounting Details Littelfuse Bec STARTCO SE 330 Neutral Grounding Resistor Monitor Rev 10 K 090815 RETAINER SCREW 8 0 RETAINER 0 31 NEUTRAL GROUNDING RESISTOR SE 330 MONITOR GROUND FAULT 9 090906909066 lesoesococosja 0000000000 9999 B 2 2 9 2 ola o sl exo lesesesja loos 000000 FRONT VIEW SE 330 SMA SIDE VIEW 25 4 63 5 x roo 2 50 NOTES 1 DIMENSIONS IN MILLIMETRES INCHES 2 MOUNTING SCREWS 4 OR 8 32 PANHEAD INSTALLATION 1 LOOSEN RETAINER SCREWS MOVE RETAINERS OUTWARD AND TIGHTEN RETAINER SCREWS 1 1 I I 1 I I I I I 1 I I I MATE MONITOR WITH ADAPTER PLUG IN TERMINALS I LOOSEN RETAINER SCREWSTO LET RETAINERS L3 i SNAP OVER MONITOR BACKP
59. t through the panel cutout and secure it with the four included 8 32 locknuts and flat washers If an optional SE IP65CVR G Hinged Cover is used follow the included installation instructions See Figs 6 and 7 All connections to the SE 330 are made with plug in wire clamping terminal blocks Each plug in terminal block can be secured to the SE 330 by two captive screws for reliable connections Outline dimensions and mounting details for surface mounting the SE 330 are shown in Fig 5 Fasten the optional surface mount adapter to the mounting surface and make connections to the adapter terminal blocks Follow Fig 5 instructions to mount or remove the SE 330 Ground terminal 7 G and connect terminal 6 R to the sensing resistor R terminal Use terminal 1 L1 as the line terminal on ac systems or the positive terminal on dc systems Use terminal 2 L2 N as the neutral terminal on ac systems or the negative terminal on dc systems Connect terminal 3 to ground Connect terminal 4 SPG to terminal 5 SPGA NOTE Disconnect terminal 1 L1 and terminal 2 L2 N before performing dielectric strength testing of the control panel Page 7 Rev 10 K 090815 Littelfuse STARTCO SE 330 Neutral Grounding Resistor Monitor TRANSFORMER OR GENERATOR NOTE 12 NOTES 11 amp 12 NOTE 1 NEUTRAL NOTE 16 XXX 1 OR XXX 5 A ot EFCTX B OR yJ
60. t Adapter AC300 MEM 00 Industrial Grade microSD Card Software SE MON330 Software SE 330 Data Display Program for PC version 3 5 or newer NGR Monitor Set Point Assistant Setting Guide NOTES Profibus models only available on legacy SE 330 Available at www littelfuse com relayscontrols Littelfuse STARTCO 8 WARRANTY The SE 330 Neutral Grounding Resistor Monitor is warranted to be free from defects in material and workmanship for a period of five years from the date of purchase Littelfuse Startco will at Littelfuse Startco s option repair replace or refund the original purchase price of an SE 330 that is determined by Littelfuse Startco to be defective if it is returned to Littelfuse Startco freight prepaid within the warranty period This warranty does not apply to repairs required as a result of misuse negligence an accident improper installation tampering or insufficient care Littelfuse Startco does not warrant products repaired or modified by non Littelfuse Startco personnel 9 TEST PROCEDURES NOTE Ensure the real time clock is set See Section 4 2 SE 330 Neutral Grounding Resistor Monitor Page 34 Rev 10 K 090815 NOTE Use an isolation transformer if the test voltage source does not provide dc continuity for the SE 330 resistance measuring circuit NOTE Applying the test voltage to the R and G terminals will damage th
61. t cette 1 of CT Primary Rating gt 3 of CT Primary Rating SE CS10 2 5 Current Ratio 1 000 5 A Insulation 600 V Class Window Diameter 63 mm 2 5 Shipping Weight 0 7 kg 1 5 Ib Certifications CE Compliance IEC 60044 1 SE CS30 26 Current Ratio 30 0 05 A Insulation 600 V Class Window Diameter 26 mm 1 07 Shipping Weight 0 45 kg 1 0 Ib Certifications CSA UL CE Compliance RoHS IEC 60044 1 Extended Operating Temperature 55 to 60 C 67 to 140 SE CS30 70 Current Ratio 30 0 05 A Insulation 600 V Class Window Diameter 70 mm 2 7 Shipping Weight 1 2 kg 2 5 Ib Certifications CSA UL CE Compliance RoHS IEC 60044 1 Extended Operating Temperature 55 to 60 C 67 to 140 200 Current Ratio 200 5 A Insulation 600 V Class Window Diameter 56 mm 2 2 Shipping Weight 1 kg 2 2 Ib Certifications CSA UL Compliance RoHS
62. tion 2 8 Refer to the appropriate SE 330 communications manual 2 6 RELAY K1 LED The yellow RELAY K1 LED follows the state of relay and is on when is energized contact closed 2 7 UNIT HEALTHY OUTPUT UNIT HEALTHY relay K4 is energized when the processor is operating It can be ordered with N O or N C contacts See Section 7 NOTE The K4 output changes state momentarily during a processor reset NOTE K4 contact rating is 100 mA maximum 2 8 DIAGNOSTIC LED The DIAGNOSTIC LED is used to annunciate trips without individual LED indication The number of short LED pulses between pauses indicates the cause of the trip See Section 5 Littelfuse STARTCO 2 9 ANALOG OUTPUT An isolated 4 20 mA output indicates NGR current with full scale output corresponding to the CT rating An internal 24 Vdc supply allows the analog output to be connected as a self powered output Power from an external supply is required for loop powered operation See Fig 2 A PGA 0520 analog meter can be panel mounted to display the NGR current See Fig 20 and Section 7 SELF POWERED PGA 0520 a9 SUPPLY PGA 0520 LOOP POWERED FIGURE 2 Analog Output Connections SE 330 Neutral Grounding Resistor Monitor Page 6 Rev 10 K 090815 3 INSTALLATION 3 1 SE 330 Outline and panel cutout dimensions for the SE 330 are shown in Fig 4 To panel mount the SE 330 insert i
63. y adding or shorting portions of the NGR See Section 3 5 Pulsing ground fault current appears as zero sequence current upstream from the fault Pulsing ground fault current is distinguishable from charging current and noise and it can be traced with a clip on ammeter or current probe If pulsing current is detected on a cable or conduit the fault is downstream Systematic testing allows faults to be located without isolating feeders or interrupting loads Stop pulsing when a fault is located 2 4 TRIP INDICATION AND RESET Red LED s and indication relays indicate ground fault and resistor fault trips The indication relays K2 GF and K3 RF operate in fail safe or non fail safe mode The default is non fail safe mode In this mode the relays are energized when a fault occurs The relay mode setting is stored in non volatile memory and can be set using the SE MON330 software or network communications When a trip occurs with latching operation selected the SE 330 remains tripped until reset with the front panel button or the remote reset input See Sections 2 1 5 3 and 2 1 5 4 Terminals 15 and 16 are provided for remote reset as shown in Fig 3 The reset circuit responds only to a momentary closure so that a jammed or shorted button does not prevent a trip The front panel RESET button is inoperative when terminal 15 is connected to terminal 16 If non latching operation is selected trips corresponding indication automatically

SE-330 Neutral-Grounding-Resistor Monitor Manual Rev

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