SE-330AU Neutral-Earthing-Resistor Monitor Manual
Contents
1. FA Littelfuse FRONT VIEW SIDE VIEW REAR VIEW NOTES 1 DIMENSIONS IN MILLIMETRES INCHES R 4 8 0 19 MAXIMUM pra Y ea 4 75 0 187 DIA 5 SIE 4 LOCATIONS PANEL MOUNT CUTOUT FIGURE A SE 330AU Outline and Panel Mounting Details Littelfuse ec STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 RETAINER SCREW 8 0 RETAINER 0 31 RESISTOR MEI T TRIP 34 NC 18 1 RESET E PULSE ENABLE 17 SE Sao ONLY 99 6 18 2av 1 04 spea ANALOG OUTPUT eo Ei 292000000014 9 9 9 9 9 9 9 9 9 9 2 EI 55 5100 RESISTOR B GROUND EARTH PRULT 25 26 EF es RESISTOR PRUET c 0525058 298 000000 FRONT VIEW SE 330 SMA SIDE VIEW 25 4 63 5 1 00 2 50 NOTES 1 DIMENSIONS IN MIILLIMETRES I2. 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 V m 80 1 000 MHz 80 AM 1 kHz 10 V m 1 0 to 2 7 GHz 80 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 t 1 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 TEC 61000 4 16 Zone A differential mode 100 Vrms Zone A common mode 300 Vrms IEC 61000 4 18 1 kV differential mode line to line 2 5 common mode Littelfuse STARTCO Voltage Interruption IEC 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 de value Certification Australia N11659 CE European Union FCC To CE Low Voltage Directive IEC 61010 1 2010 34 Edition FCC CFR47 Part 15 Subpart B Class A Unintentional Radiators Compliance AS NZS 2081 3 2002 NOTES See sensing resistor specifications for applicable voltage limits When set to MEM the range is 2 to 100 of CT Primary Rating 9 microSDTM and microSsDHC are trademarks of
3. 33 9 1 2 Voltage Test 33 9 2 Sensing Resistor Test 33 9 3 Analog Output Test 33 SE 330AU Neutral Earthing Resistor Monitor Page ii LIST OF FIGURES Rey 4 E 091515 FIGURE PAGE 1 Configuration Switches 3 2 Analog Output Connections ees 4 3 SE 330AU Connection Diagram 7 4 SE 330AU Outline and Panel Mounting Details 8 5 SE 330AU Outline and Surface Mounting Details ag p ku en 9 6 SE IP65CVR G Weatherproof Cover Outline 10 7 SE IP65CVR G Weatherproof Cover Installation u Eege 11 8 ER 600VC Sensing Reaistor eessen 12 9 SE MRE 600 Moisture Resistant Enclosure 13 10 ER 600VC Installed in SE MRE 600 14 11 ER 5KV Sensing Resistor 15 12 ER 5WP Sensing Resistor 16 13 ER 15KV Sensing Resistor 17 14 ER 25KV Sensing Resistor 18 15 ER 35KV Sensing Resistor 19 16 EFCT 1 Earth Fault Current Sensor 20 17 SE CS30 70 Earth Fault Current Sensor 21 18 EFCT 26 and SE CS30 26 Earth Fault Current 22 19 RK 332 Remote Indication and Reset 23 20 PGA 0520 Analog Percent Current Meter 23 2
4. 0 125 0 25 0 30 0 40 0 50 1 2 3 4 5 SE 330AU Neutral Earthing Resistor Monitor Page 28 Rev 4 E 091515 930 0 75 1 5 1 8 2 4 3 0 6 0 12 0 18 0 24 0 30 0 A Trip Time 0 10 0 12 0 14 0 16 0 18 0 20 0 25 0 30 0 35 0 40 0 50 s Trip Level Accuracy 0 20 of setting Trip Time Accuracy 0 20 of setting 3 dB Frequency Response 56 50 27 25 to 85 Hz S6 60 30 to 90 Hz CT Input Burden EFCT Input 110 CS30 Input 100 CT Detection Threshold 150 Thermal Withstand Continuous 10 x CT Rating 1 25 x CT Rating Measurement Range 25 x CT Primary Rating Trip Mode Latching Non Latching Trip Relay K1 Contacts Configuration N O Form A Operating Mode 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 75 W resistive 35 W inductive L R 0 04 s 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 EF K2 and RF K3 Relay Contacts Configuration
5. MOUNTING DETAIL FIGURE 13 ER 15KV Sensing Resistor Littelfuse STARTCO SE 330AU Neutral Earthing Resistor Monitor CAUTION HIGH VOLTAGE ATTENTION HAUTE TENSION STARTCO NOTES 2 AND ad 0 25 20 BINDING HEAD E 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 4 E 091515 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 TERMINAL N 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 BLOCK ENCLOSURE CABLE ENTRY MOUNT AS SHOWN WITH BASE HORIZONTAL CERTIFICATIONS NOT SHOWN FA Littelfuse Page l9 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 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 TERMINAL N 9 0 N m 80 in Ib NOTES 2 AND 4 0
6. 20 5 0 81 0 IC 1 le Ld 1 5 SCREWS MOUNTING DETAIL 25 0 30 0 RECH Ka SE CS30 70 cui Qe FA Littelfuse STARTCO 138 0 MAX 5 0 0 20 RECESSED FOR 8 mm HEX NUT 1 0 0 04 DEEP 9 NOTES MOUNTING FOOT INSTALLATION DIMENSIONS IN MILLIMETRES INCHES a gt TOOL 3 2 PRESS MOUNTING FEET IN PLACE USING 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 Earth Fault Current Sensor WA Littelfuse Page 22 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 SL 7 N 0 FT M5 SCREWS TOP MOUNTING DETAIL 25 0 26 5 0 98 1 04 roy GunnENT senson Qu FA Littelfuse STARTCO 110 0 MAX 4 0 0 16 0 RECESSED FOR 7 mm HEX NUT 3 0 0 12 DEEP NOTES DIMENSIONS IN MILLIMETRES INCHES PRESS
7. Littelfuse STARTCO 3714 Kinnear Place Saskatoon SK Canada 57 6 Ph 306 373 5505 306 374 2245 www littelfuse com relayscontrols SE 330AU MANUAL NEUTRAL EARTHING RESISTOR MONITOR Revision 4 E 091515 LITTELFUSE STARTCO NEUTRAL EARTHING RESISTOR SE 330AU MONITOR RESISTOR FAULT TRIP RELAY K1 VN TRIP LEVEL 55 amp 20 KQVux1 55 sang E Littelfuse Copyright 2015 Littelfuse Startco All rights reserved Document Number PM 1210 EN Printed in Canada Littelfuse Page i STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 This page intentionally left blank Littelfuse STARTCO TABLE OF CONTENTS SECTION PAGE 1 E EE 1 1 1 Modern Resistance Earthed Systems 1 1 2 SE 330AU NER 1 2 Operation 2 KAN 2 2 1 1 EF Trip tes 2 2122 EF Trip Level ses 2 2 1 3 Vx ees 2 2 1 4 Configuration Settings 2 2 1 4 1 Earth Fault Trip Latch S3 2 2 1 4 2 Resistor Fault Trip Latch S4 2 2 1 4 3 Sensing Resistor Selection S5 3 2 1 4 4 Frequency G 3 2 1 4 5 Upgrade Mode S8 3 2 1 5 Resistor Fault Trip Time 3 2 1 6 Resistor Fault Trip Level
8. 3 2 1 7 Geo Magnetic Filter 3 2 2 Calibration sese 3 2 3 CT Detects eter ertet eerie rete 3 2 4 Trip Indication and Reset 3 2 5 Remote 4 2 6 Relay LED 4 27 Unit Healthy Output 4 2 8 Diagnostic LEID 4 2 9 Analog Output 4 3 Installation 224222 1 6 31 SE 330AU ennt 6 3 2 Sensing Resistor a 6 3 3 Earth Fault CT 6 3 4 Isolated Earth Connection 24 4 Data Interfaces 25 AA SD Card eoo eode 25 4 1 1 Datalogging een 25 4 1 2 Firmware Upgrade 25 42 USB Interface 25 4 3 Network Communications 25 5 Troubleshooting A 26 6 Technical Specifications 28 61 5 22 28 6 2 Sensing Resistors 30 6 3 Current 31 7 Ordering Information 31 8 Warranty cosi ee eds 32 9 Test 2 1 33 9 1 Resistor Fault Tests 33 9 1 1 Calibration and Open Test
9. N O 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 ette 50 W resistive 25 W inductive L R 0 04 s 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 Ratings etre es 100 mA 250 V ac or dc STARTCO Littelfuse Closed Resistance Unit Healthy Output K4 Option Configuration Operating Mode Ratings Closed Resistance Auto reset tlme 4 20 mA Analog Output by asyay Isolation Parameter USB Communications Baud Rate Protocol sss Connector SD Memory Card TY c Form Factor POrMat mee Capacity Operating Temperature Standard Grade Included Industrial Grade Terminal
10. FIGURE 11 ER 5KV Sensing Resistor TOP VIEW 316 0 12 44 Page 15 Rev 4 E 091515 0 25 20 UNC THREADED INSERT 10 32THREADED INSERT 0 25 20 UNC STUD T FRONT VIEW MINIMUM DISTANCE ADJACENT OBJECTS MINIMUM CLEARANCE FROM BASE 254 0 10 00 z 3 355 6 14 00 457 0 18 00 MOUNTING DETAIL WA Littelfuse STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 RATINGS MAXIMUM VOLTAGE 2 500 Vac T MAXIMUM CURRENT 125 mA RESISTANCE 21 0 15 00 THERMAL 0 83 ALTERNATE NEUTRAL CONNECTION TORQUE 12 0 TERMINAL N 3 LOCATIONS 0 47 NEUTRAL CONNECTION 10 32 INSERT 5 6 N m 50 in Ib OTHERS 9 0 N m 80 in Ib o 0 25 20 UNC SE CARTTENTIONNAUTE THREADED ON INSERT FA Littelfuse STARTCO 10 32 THREADED INSERT TOP VIEW 316 0 12 44 0 25 20 UNC STUD Se V NOTE 2AND 5 SIDE VIEW FRONT VIEW NOTES MINIMUM DISTANCE P TO ADJACENT OBJECTS DIMENSIONS IN MILLIMETRES INCHES TERMINALBLOCK SCREWS 6 32 x 0 25 CABLE ACCESS OPENING IS 1 2 NPT USE A LIQUID TIGHT FITTING FOR NOTE 3 CABLEENIRY MINIMUM CLEARANCE FROM BASE 254 0 10 00 MOUNTING SCREWS M6 OR 0 25 20 THIS DEVICE CAN DISSIPATE 300 WATTS TO MINIMIZE SURFACE TEMPERATURES FOR SYSTEMS ALLOWED TO OPERATE
11. Rev 4 E 091515 STARTCO TABLE 1 TYPICAL VALUES FOR TRIPPING SYSTEMS SYSTEM VOLTAGE NEUTRAL EARTHING EARTH FAULT TRIP LEVEL VOLTS RESISTOR AMPERES LINETO LINE TO CURRENT RESISTANCE EFCT X SE CS30 X Sa 1 55 NEUTRAL AMPERES OHMS GA 30 hous RATING RATING 110 3 55 5 11 0 5 1 20 ER 600VC 20kQ 120 3 60 5 12 0 5 1 20 ER 600VC 20kQ 110 64 5 B 0 5 1 20 ER 600VC 20kQ 127 73 5 15 0 5 1 20 ER 600VC 20kQ 240 3 120 5 24 0 5 1 20 ER 600VC 20kQ 240 139 5 28 0 5 1 20 ER 600VC 20kQ 270 156 5 31 0 5 1 20 ER 600VC 20kQ 415 240 5 48 0 5 1 60 ER 600VC 20kQ 433 250 5 50 0 5 1 60 ER 600VC 20kQ 690 398 5 80 0 5 1 60 ER 600VC 20kQ 970 560 5 112 0 5 1 60 ER 5KV 20kO 1 000 575 5 115 0 5 1 60 ER 5KV 20kO 1 050 605 5 121 0 5 1 100 ER 5KV 20kO 1 100 635 5 127 0 5 1 100 ER 5KV 20kQ 1 140 658 5 132 0 5 1 100 ER 5KV 20kO 3 300 1 905 5 381 0 5 1 200 ER 5KV 20kQ 6 600 3 810 5 762 0 5 1 500 15 100kQ 6 600 3 810 10 381 1 0 0 75 500 ER ISKV 100kQ 6 600 3 810 25 152 2 0 L5 500 ER ISKV 100kQ 11 000 6 350 5 1 270 0 5 D 650 ER ISKV 100kQ 11 000 6 350 10 635 1 0 0 75 650 ER ISKV 100kQ 11 000 6 350 20 318 2 0 L5 650 ER ISKV 100kQ 11 000 6 350 25 254 2 0 24 650 ER ISKV 100kQ 22 000 12 700 5 2 540 0 5 D 1 700 ER2SKV 100kQ 22 000 12 700 10 1 270 1 0 0 75 1 700 ER2SKV 100kQ
12. Thermal 8 400 Vac minute on 120 minutes off 1 900 Vac Continuous Torque Terminal N 9 0 N m 80 in Ib Shipping Weight 5 0 kg 11 Ib ER 25KV Maximum Voltage 14 400 Vac Maximum Current 144 mA Reststance 100 Thermal 14 400 Vac minute on 120 minutes off 2 500 Continuous Torque Terminal N 9 0 N m 80 in Ib Shipping Weight 20 kg 44 Ib ER 35KV Maximum Voltage 22 000 Vac Maximum Current 220 mA Resistance 100 Thermal 22 000 Vac 1 minute on 120 minutes off 3 000 Continuous Torque Terminal N 9 0 N m 80 in Ib Shipping Weight 40 kg 88 Ib Littelfuse SE 330AU Neutral Earthing Resistor Monitor STARTCO Certification CSA Canada and USA GE LR 53428 05 UL Listed 6 3 CURRENT SENSORS Environment Operating Temperature Storage Temperature LISTED Ground Fault Sensing and Relaying Equipment 4FX9 E340889 CE European Union 40 to 60 C 40 to 140 F 55 to 80 C 67 to 176 F Page 31 Rey 4 E 091515 7 ORDERING INFORMATION SE 330AU K4 Contact 0
13. 22 000 12 700 20 635 2 0 1 5 1 700 ER2SKV 100kQ 22 000 12 700 25 508 2 0 24 1 700 ER 25KV 100kQ 22 000 12 700 50 254 2 24 8 500 ER 25KV 100kQ 33 000 19 050 50 380 2 24 10 000 ER 35KV 100kQ a 2 3 Minimum setting is 0 75 A Use EFCT x for AS NZS 2081 2002 compliance Maximum setting 1s 5 A AS NZS 2081 2002 allows 25 A Single phase centre tap Littelfuse STARTCO 3 INSTALLATION 3 1 SE 330AU Outline and panel cutout dimensions for the SE 330AU are shown in Fig 4 To panel mount the SE 330AU insert it 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 330AU are made with plug in wire clamping terminal blocks Each plug in terminal block can be secured to the SE 330AU by two captive screws for reliable connections Outline dimensions and mounting details for surface mounting the SE 330AU are shown in Fig 5 Fasten the optional SE 330 SMA 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 330AU Connect terminal 7 G to earth 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
14. Block Ratings PWB Conformal Coating Mounting Configurations Dimensions Shipping Weight Environment 30 to 50 Q 1 N C Form B Open when Healthy 100 mA 250 V ac or dc 25 to 500 2 8 s maximum Self Powered and Loop Powered 4 to 22 mA 8 to 36 Vdc 500 maximum with 24 Vdc supply 120 Vac NER Current 20 mA CT Primary Current 12 Mbit s USB Device Mini B Standard Grade microSDTMO FAT32 512 MB to 4 GB microSD and microSDHCTM 25 to 85 C 13 to 140 F 40 to 85 C 40 to 140 F 10 A 300 Vac 2 5 mn MIL 1 46058 qualified UL QMJU2 recognized Panel Mount and Optional Surface Mount 213 mm 8 4 99 mm 3 9 132 mm 5 27 2 0 kg 4 4 Ib 40 to 60 C 40 to 140 F 55 to 80 C 67 to 176 F 85 Non Condensing Surge Withstand SE 330AU Neutral Earthing Resistor Monitor EMC Tests Page 29 Rev 4 E 091515 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 Power Frequency 1 MHz
15. CONTINUOUSLY WITH A GROUND 355 6 FAULT MOUNT VERTICALLY WITH 14 00 R amp GTERMINALS DOWN i BASE IS ELECTRICALLY CONNECTED 22 0 TOTERMINAL G THROUGH JUMPER 18 00 FROM TERMINAL GTO SCREW THIS CONNECTION MAY BE MOUNTING DETAIL REMOVED FOR DIELECTRIC STRENGTH TESTING ENSURE THAT THE JUMPER IS INSTALLED AFTER TESTING CERTIFICATIONS NOT SHOWN FIGURE 12 ER 5WP Sensing Resistor WA Littelfuse Page 17 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 RATINGS MAXIMUM VOLTAGE 8 400 Vac MAXIMUM CURRENT 84mA RESISTANCE 100 kQ THERMAL 8 400 Vac 1 MINUTE ON Tenuta VOLTAGE AT TERMIT 120 MINUTES FA Littelfuse E TENSION ALA BORNE N UP OFF S EECH ZE 1 900 Vac CONTINUOUS TORQUE I TERMINALN 9 0 N m 80 in Ib 0 25 20 BINDING HEAD TOP CAUTION HIGH VOLTAGE ATTENTION HAUTE NOTES 2 AND 4 B MINIMUM DISTANCE TO ADJACENT OBJECTS 1 DIMENSIONS IN MILLIMETRES E INCHES NOTE 3 2 TERMINALBLOCK SCREWS 6 32 0 25 MINIMUM CLEARANCE FROM BASE i 305 0 12 00 i 3 MOUNTING SCREWS i M6 OR 0 25 20 4 USE LIQUID TIGHT FITTING FORTERMINAL BLOCK ENCLOSURE CABLE ENTRY 5 CERTIFICATIONS NOT SHOWN
16. Ground Fault Relay Test 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 EF TRIP LEVEL Fig 22b 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 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 Record the date and the results of the test on the attached test record form e Page 34 SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 a USING SE 400 NEUTRAL TO SE 330AU 1 L TO SENSING RESISTOR TERMINAL N REMOTE b USING SE 100T NEUTRAL TO SE 330AU TOSENSING RESISTOR TERMINAL N oc LO yo L1 o1 io L2 SE 100T CES FIGURE 22 Earth Fault Test Circuits TABLE 2 EARTH FAULT TEST RECORD DATE TEST RESULTS NOTE Do not inject test current directly into CT input terminals 8 9 and 11 NOTE For accurate trip time measurement the fault current should not be re applied for the time defined by the EF TRIP TIME setting to allow the trip accumulator to initialize Retain this
17. ISOLATED EARTH BED EARTH BED lt REMOTE EARTH FIGURE 21 Simplified Isolated Earth Connection Littelfuse STARTCO 4 DATA INTERFACES 4 1 SD CARD The SE 330AU 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 data logging of measured values and for firmware upgrades 4 1 1 DATALOGGING When a microSD card is installed the SE 330AU 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 1s 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 a microSD 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 a microSD card in conjunction with configuration switch S8 See Section 2 1 4 5 The SE Flash software is not required To upgrade the SE 330AU firmware insert a microSD card containing the firmwa
18. MOUNTING FEET IN PLACE USING A INSTALLATION TOOL PROVIDED DETAIL A Z MOUNTING FOOT MOUNTING SCREWS M4 OR 8 32 22 INSTALLATION CAT RoHS COMPLIANT EN 60044 1 COMPLIANT DETAIL A SE CS30 26 SHOWN FIGURE 18 EFCT 26 and SE CS30 26 Earth Fault Current Sensors Page 23 Rev 4 E 091515 PA Littelfuse STARTCO SE 330AU Neutral Earthing Resistor Monitor 30 0 1 18 Leer 1 geen PLATE E S EE 22 2 0 87 DIA ij RESISTOR FAULT GROUND FAULT LEGEND PLATES NOTES 1 TWO RED LED LIGHTS 24 120 VAC DC NOT POLARITY SENSITIVE YELLOW PUSH BUTTON 240 VAC A600 0 5A 125 VDC O600 DIMENSIONS IN MILLIMETRES INCHES INDICATES CLEARANCE REQUIRED PANELTHICKNESS 1 0 TO 6 0 0 04 TO 0 24 MOUNTING DETAIL NEMA 4X 30 0 MINIMUM 1 18 40 0 MINIMUM PUSH BUTTON FIGURE 19 RK 332 Remote Indication and Reset R1 25 0 049 MAXIMUM NOTES 1 DIMENSIONS IN MILLIMETRES INCHES OW A 9 40 FA Littelfuse E30 REAR PGA
19. in style SC connector Littelfuse STARTCO 5 TROUBLESHOOTING SE 330AU Neutral Earthing Resistor Monitor Page 26 Rev 4 E 091515 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 If 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 NER 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 NER 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 EF LED No Change RF LED ON K1 Trip Remote Trip DIAGNOSTIC LED flash code IL 2S 1L The SE 330AU was tripped by a signal from network communications Press RESET to clear the trip EF LED ON RF LED ON K1 Trip CT Detection Error Trip DIAGNOSTIC LED flash code A D Converter Error Trip DIAGNOSTIC LED flash code IL 3S 1L 11 48 11 The CT connection to SE 330AU is open Correct the problem and press RESET An
20. 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 SE 330AU Neutral Earthing Resistor Monitor Page 3 Rev 4 E 091515 2 2 CALIBRATION The SE 330AU measures the resistance change of the NER relative to the NER resistance value determined at the time of calibration When the resistance change is greater than a threshold amount 500 Q for 20 kO systems 2 500 for 100 kQ systems a resistor fault trip occurs Calibrate the SE 330AU on new installations 1f the NER is changed or if the sensing resistor is changed The CALIBRATION button is located behind the access cover on the front panel and it is recessed to prevent inadvertent activation NOTE Calibration must be performed with the SE 330AU connected to the sensing resistor and NER of the installed system NOTE Where used coupling components for lockout earth fault protection devices must be disconnected from the supply during calibration 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
21. trip voltage at terminal N not terminal R Procedure e Connect the ER sensing resistor connection to the SE 330AU and calibrate the SE 330AU e Disconnect the wire from sensing resistor terminal N e Set the voltage source to 0 V e Connect the voltage source between sensing resistor N and G terminals e Set the Vy TRIP LEVEL VAC to 20 e Press RESET e The RESISTOR FAULT TRIP LED should be off Page 33 Rey 4 E 091515 e Increase the test voltage to 25 Vac for 20 kQ sensors or 120 Vac for 100 kQ sensors and wait the resistor fault trip time e PASS The SE 330AU should trip on RESISTOR FAULT A time delayed earth fault trip follows the resistor fault trip if neutral voltage persists after the resistor fault 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 kQ 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 curre
22. 0520 ANALOG CURRENT METER FRONT FIGURE 20 PGA 0520 Analog Percent Current Meter WA Littelfuse Page 24 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 3 4 ISOLATED EARTH CONNECTION Isolated earthing can prevent an earth potential rise EPR from being transferred to remote equipment If the G terminals on the sensing resistor and the SE 330AU are connected to isolated earth the SE 330AU will be exposed to the EPR If the EPR is greater than the terminal block rating the SE 330AU must be isolated from station earth 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 330AU to be connected to station earth is shown in Fig 21 The SE 330AU monitors the series combination of the NER and the two earthing points This configuration is acceptable provided the series resistance of the NER and earth is within the NER calibration range and earth resistance changes remain within the trip range See Section 6 1 NEUTRAL ER SERIES STATION SENSING TRIP CIRCUIT RESISTOR 22 23 Ki STATION SL Re CONTROL SUPPLY 2 L2 N Go SE 330AU 3 4 STATION EARTH BUS STATION
23. 1 Simplified Isolated Earth Connection 24 22 Earth Fault Test Circuits 34 LIST OF TABLES TABLE PAGE 1 Typical Values for Tripping Systems 5 2 Earth Fault Test Record 34 DISCLAIMER Specifications are subject to change without notice Littelfuse Startco is not liable for consequential damages or for expenses sustained as a of incorrect application incorrect adjustment malfunction contingent result or a WA Littelfuse Page iii STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 This page intentionally left blank Littelfuse STARTCO 1 GENERAL 1 1 MODERN RESISTANCE EARTHED SYSTEMS A high resistance earthed system uses neutral earthing resistor NER with a low let through current to limit earth fault current This is an improvement over low resistance or solidly earthed systems because in those systems an earth fault flash hazard exists and an earth fault can result in substantial point of fault damage High resistance earthing eliminates these problems and modern earth fault protection operates reliably at low current levels Furthermore the probability of an arc flash incident 1s significantly reduced in a high resistance NER system NER selection depends on system charging current System charging current is the capacitive current that flows to earth when a bolted
24. 25 20 BINDING HEAD TOP Wo MINIMUM CLEARANCE FROM BASE 685 0 27 00 MINIMUM DISTANCE TO ADJACENT OBJECTS MOUNTING DETAIL DIMENSIONS IN MILLIMETRES INCHES TERMINAL BLOCK 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 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 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 1 r SE M5 SCREWS TOP MOUNTING DETAIL 25 0 30 0 0 98 7 a8 7 _ EFCT 1 EARTH FAULT CT v CLASS INSULATION CLASS A E utteltuse cus 227 138 0 5 0 0 20 0 E yf RECESSED FOR 5 2 CONDITIONER de 8 mm HEX NUT 1 0 0 04 DEEP FIGURE 16 EFCT 1 Earth Fault Current Sensor WA Littelfuse Page 21 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515
25. A D converter error was detected Press RESET to clear the trip If the problem persists consult Littelfuse Startco EF LED No Change RF LED ON K1 Trip SD Card DIAGNOSTIC LED flash code IL 5S 1L SD Card is full or a write error occurred Delete files or use a different microSD card EF 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 supply from SE 330AU insert a microSD card containing the firmware upgrade file in the root directory of the SD card power on the SE 330AU set switch S8 to UPGRADE within 30 s the upgrade should continue as described in Section 4 1 2 Watchdog Trip DIAGNOSTIC LED flash code IL 6S 1L 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 EF LED ON RF LED ON K1 Trip CPU Trip DIAGNOSTIC LED flash code Non Volatile Memory Error Trip DIAGNOSTIC LED flash code 11 78 11 11 85 11 The CPU has detected system fault Press RESET to clear the trip EF LED ON RF LED ON K1 Trip An error was detected in the Non Volatile Memory Press RESET to clear the trip If the problem persists consult Littelfuse Startco ON RF LED ON K1 T
26. 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 330AU may be calibrated remotely using the SE MON330 software with the USB interface or the communications options If latching resistor fault switch S4 is selected the calibration error code flashes until RESET is pressed even if the CALIBRATED LED is on The calibration value is stored in non volatile memory 2 3 CT DETECTION The SE 330AU monitors the continuity of the CT circuit When an open CT circuit is detected for two seconds the SE 330AU will trip on earth fault and the diagnostic LED will flash the CT Detection Error code See Section 2 8 The CT Detection Error code remains until CT circuit continuity is detected and RESET is pressed If supply voltage is cycled earth fault trip indication is not reset but the CT Detection Error indication is reset CT Detection Error indication will resume after two seconds if CT circuit continuity is not detected 2 4 TRIP INDICATION AND RESET Red LED s and indication relays indicate earth fault and resistor fault trips The indication relays K2 EF 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 Littelfuse STARTCO 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 c
27. L CE Compliance s sseseeeseeeesee RoHS IEC 60044 1 Supply 0 Unive rsal ac dc Supply 2 48Vdc Supply 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 330au 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 For system voltages up to 5kVac For system voltages up to 5 kVac weather protected ER ISKV For system voltages up to 15 kVac 25 For system voltages up to 25 kVac 35 For system voltages up to Current Sensors EFCT 26 SE CS30 26 SE CS30 70 35 kVac Current Sensor 5 A primary rating 82 mm 3 2 window 6m 19 5 of 22 AWG 3 3 mm shielded cable included Current Sensor 5 A primary rating 26 mm 1 0 window 6m 19 5 of 22 AWG 3 3 mm shielded cable included Current Sensor 30 A primary rating 26 mm 1 0 window Current Sensor 30 A primary rating 70 mm 2 7 window WA Littelfuse Page 32 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 Accessories RK 332 aa cente Remote Indication and Reset includes
28. NCHES 2 MOUNTING SCREWS M4 OR 8 32 PANHEAD MONITOR INSTALLATION 1 LOOSEN RETAINER SCREWS MOVE RETAINERS OUT WARD ANDTIGHTEN RETAINER SCREWS MATE MONITOR WITH ADAPTER PLUG IN TERMINALS LOOSEN RETAINER SCREWS TO LET RETAINERS SNAP OVER MONITOR BACKPLATE ENSURETHAT RETAINERS ARE AGAINST MONITOR BODY ANDTIGHTEN RETAINER SCREWS MONITOR REMOVAL 1 LOOSEN RETAINER SCREWS SLIDE RETAINERS AWAY FROM MONITOR BODY ANDTIGHTEN RETAINER SCREWS BEZEL OUTLINE BB 2 PULL MONITOR FORWARD MOUNTING DETAIL FIGURE 5 SE 330AU Outline and Surface Mounting Details Littelfuse MM Page 10 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 TO PREVENT UNAUTHORIZED ENTRY 1 USEWIRE SEALTHROUGH HOLES IN WEATHERPROOF COVER ASSEMBLY OR 2 SECURE WITHTHE PLASTIC THREAD FORMING SCREW SUPPLIED IN KIT TOP VIEW HOLE FOR SEAL WIRE wi 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 Weathe
29. NG SCREWS M4 OR 8 32 ON REVISION 2 UNITS ENCLOSURE IS ELECTRICALLY CONNECTEDTO TERMINAL G THROUGH JUMPER FROM TERMINAL G TO SCREW THIS CONNECTION MAY BE REMOVED FOR DIELECTRIC STRENGTH TESTING ENSURETHAT THE JUMPER IS INSTALLED AFTER TESTING ON REVISION 1 UNITS Q SCREW IS NOT PRESENT AND ENCLOSURE IS ELECTRICALLY CONNECTEDTO TERMINAL G NOT ALL CERTIFICATIONS SHOWN FIGURE 8 ER 600VC Sensing Resistor Littelfuse MM Page 13 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 120 4 4 74 ENCLOSURE TOP VIEW COVER REMOVED 9 Y 120 4 4 74 ENCLOSURE TOP VIEW MOUNTING DETAIL NOTES 1 DIMENSIONS IN MILLIMETRES INCHES 2 MOUNTING SCREWS M6 OR 0 25 20 Lo ENCLOSURE SIDE VIEW FIGURE 9 SE MRE 600 Moisture Resistant Enclosure FA Littelfuse Pager STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 MOUNTING SCREW LOCATIONS ER 600VC SENSING RESISTOR O 600 VAC MAX 2 FA Littelfuse ENCLOSURE TOP VIEW COVER INSIDE VIEW COVER REMOVED ASSEMBLY INSTRUCTIONS DRILL HOLE FOR ENCLOSURE WIRE ENTRY USE LIQUID TIGHT GLAND REMOVE NYLON NUTS AND WASHERS INSERT ER 600VC INTO ENCLOSURE REPLACE NUTS AND WASHERS ATTACH EARTH WIRE FROM ENCLOSURE T
30. O COVER AND TO ER 600VC 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 CONTINUOUS TORQUE TERMINAL N 3 LOCATIONS SE 330AU Neutral Earthing Resistor Monitor 381 0 210 15 00 0 83 ALTERNATE NEUTRAL CONNECTION 12 0 0 47 NEUTRAL CONNECTION 10 32 INSERT 5 6 N m 50 in Ib OTHERS 9 0 N m 80 in Ib y ER 5KV SENSING RESISTOR TENSION FA Littelfuse EVE ALA TEI STARTCO NEUTRE QUAND UN RRE A LIEU ROO NOTES 5 amp 6 SIDE VIEW NOTES DIMENSIONS IN MILLIMETRES INCHES TERMINALBLOCK 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 ALLOWEDTO 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
31. ONNECTION USES TERMINALS 19 AND 20 ONLY OPTIONAL MICRO SD MINI B USB DEVICE CONNECTOR NETWORK COM SLOT NOTE 10 REFER TO APPROPRIATE SE 330 SE 330AU COMMUNICATIONS INTERFACE MANUAL INDICATION TWO CONDUCTORTWISTED CABLE EARTH FAULT REQUIRED SHIELDED OR ARMOURED m TRIP RECOMMENDED x RESISTOR FAULT TRIP CT CONNECTION IS NOT POLARITY SENSITIVE Se DIAGNOSTIC A 13 DASHED LINE IS SE CS30 x CONNECTION N CALIBRATED NS duo 14 CONNECT CONTACTS K1 K2 K3 AND K4 AS Y RELAY K1 REQUIRED FOR PROTECTION INDICATION Ee D AND CONTROL POWER 15 EXTERNAL LIGHTS AND SWITCHES NCLUDED WITH SE 330AU 16 SELF POWERED 4 20 mA OUTPUT 17 TYPICALTRIPPING SYSTEM 18 EARTH CURRENT SENSOR ATTERMINAL 11 ONLY FIGURE 3 SE 330AU Connection Diagram FA Littelfuse Page 8 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 16 0 132 0 oar 5 20 Hl PANELTHICKNESS LITTELFUSE STARTCO NEUTRAL EARTHING RESISTOR SE 330AU MONITOR RESISTOR FAULT DIAGNOSTIC TRIP CALIBRATED RELAY K1 ATTENTION Lee Sai E JO wf
32. OT USED LATCHING EF TRIP LATCHING RF TRIP 20 KO 50 Hz NON LATCHING EF TRIP NON LATCHING RF TRIP 100 60 Hz NOT USED RUN NOTE DEFAULT SETTINGS SHOWN UPGRADE FIGURE 1 Configuration Switches 2 1 4 3 SENSING RESISTOR SELECTION S5 Set switch S5 to the resistance of the sensing resistor For the ER 600VC ER 5KV and ER 5WP select 20 kQ For the 15 ER 25KV and ER 35KV select 100 Switch S5 sets the V TRIP LEVEL range See Section 2 1 3 2 1 4 4 FREQUENCY 56 Set switch S6 to 50 or 60 Hz to tune the digital filter to the line frequency of the monitored system 2 1 4 5 UPGRADE MODE 58 The microSDTM card is used for firmware upgrades See Section 4 1 2 for upgrade instructions NOTE An upgrade causes an SE 330AU restart and this may cycle the output relays 2 1 5 RESISTOR FAULT TRIP TIME The resistor fault trip time can be adjusted from 12 default to 60 seconds using the SE MON330 software or via network communications 2 1 6 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 7 GEO MAGNETIC FILTER A low frequency earth 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
33. 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 IEC 61850 Dual SC Fiber EFCT 1 Current Ratio 5 0 05 A Insulation 600 V Class Window Diameter 82 mm 3 27 Shipping Weight 0 9 kg 2 0 Ib Certifications CSA UL CE Compliance s esseeseeseeeesee RoHS IEC 60044 1 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 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 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 U
34. c 10 45 50 60 Hz 20 W 110 to 250 Vdc 10 25 Ee 20 W 48 Vdc 50 25 35 VA 48 Vac 10 45 50 60 Hz Power Up Time s seseeeeeeeesee 3 s at 120 Vac AC Measurements Discrete Fourier Transform 16 samples per cycle 50 or 60 Hz Resistor Fault Circuit Neutral To Earth Voltage Trip Levels ER 600VC or ER 5KV 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 10 000 Vac Accuracy 10 of setting 3 dB Frequency Response S6 50 HZz 25 to 85 Hz S6 60 Hz 30 to 90 Hz NER Calibration Range ER 600VC ER 5KV or ER SWP 0 to 2 ER 15KV to ER 35KV 0 to 10 Trip Resistance Vy 0 ER 600VC ER 5KV or ER 5WP 250 to 750 O change bs 200 Default 500 O change ER 15KV to ER 35KV 1 25 to 3 75 kQ change 1 kO Default anan 2 5 kO change Neutral to Earth DC Voltage Rejection ER 600VC ER 5KV or IEN EE 25 Vdc ER 15KV to ER 35KV 125 Vdc Trip Tire 12to60st1s Trip Hold Off Level 5 of CT Primary Rating Trip Latching Non Latching Earth Fault Circuit Trip Level EFCT x
35. ccess 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 can be viewed and adjusted e Earth fault trip setting when front panel EF Trip Level is set to MEM K2 earth 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 Modbus TCP over cable or fiber ordering options 3 4 and 5 61850 over cable or fiber ordering options 6 7 and 8 Refer to the appropriate SE 330 communications interface manual for details Uses the plug
36. current sensors are shown in Figs 16 17 and 18 Earth fault CT connections and the typical earth fault CT location are shown in Fig 3 If an earth fault in the NER is unlikely a minimal loss of protection will result if the earth fault CT monitors the NER connection to earth rather than its connection to neutral Littelfuse Rud STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 TRANSFORMER OR GENERATOR NOTE 1 NEUTRAL NOTE 11 12 amp 13 1 j OR SE CS30 x ER SERIES NOTE 18 SENSING pien 4 RESISTOR CS30 EFCT L CONTROL I N CONTROL NOTE 14 amp 15 NOTES 1 USE SEPARATE LUG TO CONECT SENSING RESISTORTERMINAL N TO NEUTRAL LOCATETHESE COMPONENTS NEAR TRANSFORMER OR GENERATOR SEN RESISTOR ALTERNATE SENSING RESISTOR TERMINAL N K4 FAULT CONNECTION THE NEUTRAL CONNECTION o IS NOT MONITORED UNIT HEALTHY NOTE 7 424V 0 VOLTAGE BETWEEN SENSING RESISTOR Ee TERMINALS R AND G IS LIMITEDTO 100 V BY INTERNAL CLAMP NOTE 15 ANALOG oureur SEE SECTION 3 4 FOR ISOLATED EARTH Q RESET 2 NOTE 16 C CONNECTION J DN OF O op PGA 0520 6 RELAY CONTACTS SHOWN WITH SE 330AU CONNECTION DE ENERGIZED o USB PORT 9 OPTIONAL N C K4 AVAILABLE LOOP POWERED C
37. e the SE 330AU NER failure detection resistance The SE 330AU provides additional features over the SE 330AU legacy model revision 01 or less Littelfuse STARTCO e When the trip level is set to MEM the earth fault trip setting is 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 A microSD 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 e The IEC 61850 protocol has been added 2 OPERATION 2 1 SETTINGS 2 1 1 EF TRIP TIME EF TRIP TIME definite time is adjustable from 0 1 to 0 5 seconds Time coordinated earth fault protection requires this setting to be longer than the trip times of downstream earth fault devices A trip time accumulator provides an earth fault memory function for detection of intermittent faults The accumulated time increases when an earth fault is detected and decreases when an earth fault is not detected A trip will eventually occur when the time for fault current above the trip
38. earth fault occurs This current can be calculated or measured For small systems the magnitude of charging current can be conservatively estimated as L A per 1 000 kVA on low voltage systems and 1 A per 1 000 kVA on medium voltage systems Choose an NER with a let through current larger than the system charging current Set the pick up current of earth fault devices at or below 10 of the NER let through current for systems up to 1 1 KV and 20 of the NER let through current for systems above 1 1 KV Use earth fault devices with a definite time characteristic to achieve time coordination Use the same pick up current for all earth fault devices this value must be larger than the charging current of the largest feeder Select an NER with a let through current between five and 10 times the pick up current of the earth fault devices Do not use an earthing 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 an earth fault through a rectifier can make earth fault protection inoperative e Transformer inrush current up to 12 times rated current can cause an earth fault voltage larger than expected e A parallel transformer winding makes it difficult to monitor NER continuity transformer can provide the inductance necessary to cause ferroresonance if the NER opens Following
39. itch S8 Diagnostic LED error removed Littelfuse Page 36 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 SECTION 6 Earth Fault Circuit Trip Level updated USB Communications specifications added SECTION 7 Ordering information updated HARDWARE REVISION HISTORY HARDWARE REVISION 15 RTC circuit updated HARDWARE REVISION 14 Updated SE 330AU platform to include USB and microSD interfaces programmable Trip Level MEM feature and ability to add future options Real time clock added 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 Updated firmware to include USB and microSD interfaces datalogging and firmware update via microSDTM K2 and K3 indication relays can be configured for fail safe or non fail safe operation Event records increased to 100 with date and time stamping Re
40. level is greater than the time for fault current below the trip level 2 1 2 EF TRIP LEVEL The SE 330AU uses a Discrete Fourier Transform DFT Algorithm to measure the fundamental component of NER current Choose an NER let through current and an earth fault trip level according to the guidelines in Section 1 1 Earth fault current is sensed by a sensitive CT EFCT x or SE CS30 x The trip level of the earth fault circuit is adjustable from 0 125 to 5 A for the EFCT x and 0 75 to 30 A for the SE CS30 x When EF TRIP LEVEL is set to MEM the earth 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 For example if the MEM parameter is set to 15 default the trip level will be 0 75 A or 4 5 A when using the EFCT x or SE CS30 x respectively Typical values are shown in Table 1 For other systems refer to the NER Monitor Set Point Assistant at www littelfuse com relayscontrols The Set Point Assistant is included with the SE MON330 software SE 330AU Neutral Earthing Resistor Monitor Page 2 Rev 4 E 091515 2 1 3 Vy TRIP LEVEL The SE 330AU 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 earth fault current is less
41. mote calibration feature added SD Card and USB diagnostic events do not cause a trip
42. nt 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 Littelfuse STARTCO 9 4 EARTH FAULT PERFORMANCE TEST To meet the requirements of the AS NZS 2081 3 2002 the overall earth fault protection system requires a performance test test record form is provided for recording the date and the final results of the performance tests The following earth fault system tests are to be conducted by qualified personnel a Evaluate the interconnected system in accordance with the overall equipment manufacturer s detailed instructions b wm Verify proper installation of the earth fault current sensor Ensure the cables pass through the earth 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 330AU is not polarity sensitive Verify that the system is correctly earthed and that alternate earth paths do not exist that bypass the current sensor High voltage testers and resistance bridges can be used to determine the existence of alternate earth paths d Verify proper reaction of the circuit interrupting device in response to a simulated or controlled earth fault current To simulate earth fault current use CT primary current injection does not apply for bushing type CT s Fig 22a shows a test circuit using an SE 400
43. oisture 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 The ER ISKV ER 25KV and ER 35KV include moisture resistant terminal covers Use suitable water tight fittings Connect terminal G to earth Pass the sensing resistor to neutral conductor and the NER to neutral conductor through the earth fault CT window as shown in Fig 3 Separately connect sensing resistor terminal N and the NER to the neutral to include neutral connections in the monitored loop Alternatively if the NER connection to system neutral need not be monitored connect terminal N to the NER neutral terminal If an earth fault in the sensing resistor conductor is unlikely a minimal loss of protection will result if it does not pass through the earth fault CT window See Fig 3 3 3 EARTH FAULT CT Select and install an earth fault CT that will provide the desired trip level Typically the CT primary rating should be approximately equal to the NER let through current rating This provides an appropriate EF TRIP LEVEL setting range and analog output scaling The primary rating of the EFCT x 1s 5 A and the primary rating of the SE CS30 x is 30 A See Sections 2 1 2 and 2 9 Outline and mounting details for the sensitive EFCT x and SE CS30 x
44. ommunications When a trip occurs with latching operation selected the SE 330AU remains tripped until reset with the front panel button or the remote reset input See Sections 2 1 4 1 and 2 1 4 2 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 and corresponding indication automatically reset when the fault clears Resistor fault trip reset can take up to one second The red DIAGNOSTIC LED annunciates latched calibration error and remote trips See Section 2 8 When supply voltage is applied the SE 330AU returns to its state prior to loss of supply voltage A resistor fault trip memory trip can take up to three seconds after SE 330AU power up 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 330AU s can be remotely tripped
45. or NOTE Ensure the real time clock is set See Section 4 2 9 1 RESISTOR FAULT TESTS Perform tests with system de energized and supply voltage applied to the SE 330AU 9 1 1 CALIBRATION AND OPEN TEST Test Equipment 20 kQ 100 1 4 watt 1 calibration resistors calibration resistors are supplied with SE 330AU 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 330AU should trip on resistor fault Connect the 100 kQ resistor to terminals 6 and 7 Set switch S5 to the 100 kQ position e Perform calibration as per Section 2 2 The CALIBRATED LED should be on e Press RESET Remove the 100 kQ resistor and wait for the resistor fault trip time PASS The SE 330AU 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 NOTE Use an isolation transformer if the test voltage source does not provide dc continuity for the SE 330AU resistance measuring circuit NOTE Applying the test voltage to the R and G terminals will damage the SE 330AU and the ER sensing resistor The Vy TRIP LEVEL is the
46. re 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 330AU evaluates firmware upgrade files found in the root 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 330AU 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 record of the upgrade can be found in upgrade log lt SN gt txt on the microSD card This file is updated each time an upgrade is performed SE 330AU Neutral Earthing Resistor Monitor Page 25 Rey 4 E 091515 NOTE The maximum recommended microSD card storage capacity is 4 GB 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 4 2 USB INTERFACE Use the SE MON330 software version 3 5 or newer to a
47. record for the authority having jurisdiction Littelfuse Page 35 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 APPENDIX A SE 330AU REVISION HISTORY HARDWARE REVISION ee Ge REVISION NUMBER FIRMWARE REVISION ON PRODUCT LABEL September 15 2015 4 E 091515 2 52 May 20 2015 4 C 052015 p March 3 2015 4 B 030315 4 July 8 2014 4 A 070814 14 2 31 MANUAL REVISION HISTORY REVISION 4 E 091515 SECTION 4 Section 4 1 2 updated SECTION 5 SD card diagnostic troubleshooting updated REVISION 4 D 062215 SECTION 2 Section 2 1 6 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 4 C 052015 SECTION 4 SD Card storage capacity updated SECTION 6 SD Card storage capacity specification updated REVISION 4 B 030315 SECTION 2 Sections 2 1 5 and 2 1 6 added SECTION 4 Section 4 2 new features added SECTION 6 Resistor fault circuit trip time updated REVISION 4 A 070814 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 changed to Data Interfaces Updated with microSD and USB interfaces Upgrade procedure added SECTION 5 Non volatile memory error added Sw
48. reset and calibrated by the network master The red DIAGNOSTIC LED indicates a network initiated trip See Section 2 8 Refer to the appropriate SE 330AU 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 SE 330AU Neutral Earthing Resistor Monitor NOTE The K4 output changes state momentarily during a processor reset NOTE K4 contact rating is 100 mA maximum Page4 Rev 4 E 091515 2 8 LED The DIAGNOSTIC LED is used to annunciate trips without individual LED indication The number of short LED pulses between two long pulses indicates the cause of the trip See Section 5 2 9 ANALOG OUTPUT An isolated 4 20 mA output indicates NER 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 The PGA 0520 analog meter can be panel mounted to display the NER current See Fig 20 Section 7 SELF POWERED PGA 0520 LOOP POWERED FIGURE 2 Analog Output Connections Littelfuse SE 330AU Neutral Earthing Resistor Monitor Page 5
49. rip SD Upgrade Error DIAGNOSTIC LED flash code DIAGNOSTIC LED Solid Red 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 EF LED No Change RF LED No Change K1 No Change SE 330AU processor failed to start Cycle supply If problem persists consult Littelfuse Startco K1 De energized Pressing RESET does not clear trips UNIT HEALTHY relay K4 momentarily changes state Trip condition is still present Locate and correct The RESET button is disabled if remote reset terminals 15 and 16 are connected Replace shorted remote reset switch or issue Reset command from the communications network Occurs when processor is reset Bo Littelfuse SE 330AU Neutral Earthing Resistor Monitor Rev PE ed STARTCO 8 PROBLEM DIAGNOSTICLED SOLUTION FLASH Coppi 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 0 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 330AU Supply Option 0 2 aaa eere 30 VA 120 to 240 Va
50. rproof Cover Outline Page 11 FA Littelfuse STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 INSTALL O RING INTO GROOVE INTHE REAR OF WEATHERPROOF WINDOW e INSERTTHE SE 330AU THROUGH OPENING OF THE WEATHERPROOF WINDOW UNTIL IT IS SECURELY NESTED 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 SS 2 0 INSERT ASSEMBLY INTO PANEL AND FASTEN WITH THE HARDWARE PROVIDED WITH THE SE 330AU FIGURE 7 SE IP65CVR G Weatherproof Cover Installation Littelfuse MM Page 12 STARTCO SE 330AU Neutral Earthing Resistor Monitor Rev 4 E 091515 RATINGS MAXIMUM VOLTAGE 600 Vac MAXIMUM CURRENT 30 mA RESISTANCE THERMAL 600 Vac 6 MINUTES ON 60 MINUTES OFF CONTINUOUS 40 0 1 57 IQ N R G Q SENSING RESISTOR 20 KO 600 VAC MAX FA Littelfuse STARTCO 600 Vac 50 60 Hz Duty Cycle 6 Minutes On 60 Minutes Off c Use with SE 325 SE 330 SE 330AU Rating ttelfuse SENSING RESISTOR Serial No GC131105487 STARTCO EA US IEEE 32 ER 600VC 6 LR a C 4 5 0 18 DIA C BORE 10 0 0 39 DIA 3 2 0 13 DEEP FRONT MOUNTING DETAIL NOTES DIMENSIONS IN MILLIMETRES INCHES TERMINALBLOCK SCREWS 6 32 x 0 25 MOUNTI
51. ssible for fault resistance to satisfy the NER resistance measurement To detect this double fault condition the SE 330AU measures neutral voltage If neutral voltage exceeds the Vy TRIP LEVEL setting and if NER current is less than 5 of the current transformer CT rating the SE 330AU will trip on resistor fault If the resistor fault circuit is tripped and the neutral voltage exceeds the Vy TRIP LEVEL setting for an interval greater than the EF TRIP TIME setting the earth fault circuit will also trip Earth fault current is sensed by a sensitive CT EFCT x or SE CS30 x The trip level of the earth fault circuit 1s adjustable from 0 125 to 5 A for the EFCT x and 0 75 to 30 A for the SE CS30 x Trip time is adjustable from 0 1 to 0 5 seconds Open CT detection is provided with a fixed 2 second time delay The SE 330AU has four output relays Relay is the trip relay Relays K2 and K3 provide earth fault and resistor fault indication K4 is a solid state relay that provides UNIT HEALTHY indication Relay KI operates in the fail safe mode for undervoltage applications 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 330AU is compatible with lockout earth fault protection devices the on line phase to earth resistance added by coupling components must be abov
52. systems Use terminal 2 L2 N as the neutral terminal on ac systems or the negative terminal on dc systems Connect terminal 3 to earth Connect terminal 4 SPG to terminal 5 SPGA SE 330AU Neutral Earthing Resistor Monitor Page 6 Rey 4 E 091515 NOTE Voltage at terminal N rises to line to neutral voltage when an earth fault occurs The same clearances are required for sensing resistors as for NER s NOTE A parallel earth 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 330AU terminal R including interposing terminal blocks must remain dry NOTE The neutral to sensing resistor terminal N connection is not a neutral conductor Since current through this conductor is always less than 250 mA a 1 5 mm conductor insulated to the system voltage is more than sufficient NOTE For outdoor installations sensing resistors must be in an IP14 enclosure NOTE Disconnect terminal 1 L1 and terminal 2 L2 N before performing dielectric strength testing of the control panel 3 2 SENSING RESISTOR Outline and mounting details for the ER 600VC ER 5KV ER 5WP ER 15KV ER 25KV and ER 35KV sensing resistors are shown in Figs 8 11 12 13 14 and 15 Install the NER and the sensing resistor near the transformer or generator An optional SE MRE 600 M
53. than 5 of the CT rating the SE 330AU will trip on resistor fault If the resistor fault circuit is tripped and the neutral voltage exceeds the Vy TRIP LEVEL setting for an interval greater than the EF TRIP TIME setting the earth 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 kQ 5 position Calculate the voltage across the NER when NER current is equal to the pick up current of the earth fault circuit Set the Vy TRIP LEVEL at the next largest value See Fig 1 and Section 2 1 4 3 Typical values are shown in Table 1 For an NER resistance greater than 2 use 100 kQ sensing resistor For other systems refer to the NER Monitor Set Point Assistant at www littelfuse com relayscontrols NOTE A resistor fault trip is held off if the earth fault current is above 5 of the CT rating 2 1 4 CONFIGURATION SETTINGS Eight configuration switches 51 to S8 and a calibration button are located behind the access cover on the front panel See Fig 1 2 1 4 1 EARTH FAULT TRIP LATCH S3 Set switch S3 to select latching or non latching earth fault circuit operation See Section 2 4 2 1 4 2 RESISTOR FAULT TRIP LATCH S4 Set switch S4 to select latching or non latching resistor fault circuit operation See Section 2 4 Littelfuse STARTCO e CALIBRATION BUTTON CAL NOT USED N
54. these guidelines will reduce the flash hazard reduce point of fault damage achieve reliable earth fault protection and ensure a stable system not subject to ferroresonance SE 330AU Neutral Earthing Resistor Monitor Page 1 Rev 4 E 091515 1 2 SE 330AU NER MONITORING The SE 330AU is a microprocessor based neutral earthing resistor monitor that detects NER failures and earth faults in resistance earthed systems The SE 330AU measures NER resistance NER current and transformer or generator neutral to earth voltage The components required to monitor an NER are an SE 330AU an ER series sensing resistor and a current transformer CT Power circuit elements other than neutral connected NER s that purposefully connect the power system to earth may not be compatible with SE 330AU NER monitoring These elements include single phase earthing transformers earthed wye primary potential transformers PT s and earthed wye primary power transformers The SE 330AU continuously measures NER resistance in an unfaulted system It will trip on resistor fault if NER resistance varies from its calibrated value When an earth fault occurs voltage is present on the neutral and NER current will flow if the NER is healthy The SE 330AU will trip on earth fault if fault current exceeds the EF TRIP LEVEL setting for an interval greater than the EF TRIP TIME setting However if the NER fails and creates an open circuit during an earth fault it is po
55. 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 Percent Analog Meter SE 330 SMA Surface Mount Adapter AC300 MEM 00 Industrial Grade microSD Card Software SE MON330 Software SE 330AU Data Display Program for PC version 3 5 or newer NER Monitor Set Point Assistant Setting Guide NOTES Profibus models only available on legacy SE 330AU Available at www littelfuse com relayscontrols 8 WARRANTY The SE 330AU Neutral Earthing 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 330AU that is determined by Littelfuse Startco to be defective if it is returned to the factory 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 Littelfuse STARTCO 9 TEST PROCEDURES SE 330AU Neutral Earthing Resistor Monit
56. ui SD 3C LLC Remote reset wiring is limited to 10 m 32 This value can only be modified using SE MON330 software See Section 4 2 6 2 SENSING RESISTORS Environment Operating Temperature 40 to 60 C 40 to 140 F Storage Temperature 55 to 80 C 67 to 176 F ER 600VC Maximum Voltage 600 Vac Maximum Current 30 mA 20 Thermal 420 Vae iier Continuous 600 Vac 6 minutes on 60 minutes off Shipping Weight 300 g 0 7 Ib SE 330AU Neutral Earthing Resistor Monitor Page 30 Rev 4 E 091515 ER 5KV Maximum Voltage 2 500 Vac Maximum Current 125 mA 20 Thermal ees Continuous Torque Terminal N 10 32 Insert 5 6 N m 50 in Ib nee 9 0 N m 80 in Ib Shipping Weight 5 0 kg 11 Ib ER 5WP Maximum Voltage 2 500 Vac Maximum Current 125 mA 1 20 Thermal Continuous Torque Terminal N 10 32 Insert 5 6 N m 50 in Ib eebe 9 0 N m 80 in Ib Shipping Weight 5 0 kg 11 Ib ER 15KV Maximum Voltage 8 400 Vac Maximum Current 84 mA 100
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