User Manual
Contents
1. DP2 Symbols Description Blank Off Note 1 Real time leakage current display Default 1 Off On lAn Sensitivity setting A 2 Off On At Trip time delay setting second 3 Off Off SHOTS Nos of shots reclose operations 4 Off Off tDEAD Dead time sec 5 Off Off tPF Persistent fault monitoring time sec 6 Off Off tREC Reclaim time min 7 Off Off tLAR Lockout automatic reset time hours 8 Off Off RLY2 Programmable contact A On Note 1 Fit 1 Fault record 1 Most recent b On Note 1 Fit 2 Fault record 2 Cc On Note 1 Fit 3 Fault record 3 Oldest Table 2 List of FUNC code displayed Note 1 Parameters Setting e Step 1 Press RESET button to step to desired parameter If DP2 is OFF The unit for the DATA displayed is in mA If DP2 is ON The unit for the DATA displayed is in ampere A e Step 2 Press A and W buttons simultaneously and hold for 1 5s to enter programming mode The FUNC digit blink to indicate the relay has enter into the programming mode e Step 3 Press a or W button to increase or decrease the parameter value e Step 4 To save the selected value press A and W buttons simultaneously and hold for 1 5s It will exit the programming mode with DATA displaying the new setting e To exit programming mode without saving the selected setting press the RESET button once 4 DIGITAL INPUT PORT a The digital port is for remotely reset the relay when tripped lockout or ZCT conn2. g h a DATA display Symbols b Trip status indicator lAn Sensitivity setting c Alarm status indicator At Time time delay setting d DP2 indicator SHOTS Nos of reclose operations e Decrement button tDEAD Dead time f Increment button tPF Persistent fault monitoring time g RESET button tREC Reclaim time h TEST button tLAR Lockout auto reset time i 2 Model RLY2 Programmable Output contact NN Fit 1 Fault record 1 Most recent j DP1 indicator Fit Fault d 2 Fault recor k FUNC display Fit 3 Fault record 3 Oldest DESCRIPTION The MK330A is microprocessors based earth leakage relay with built in self reclosing function The earth leakage protection module is designed for measure the low level current flowing from the live part of the installation to the earth in the absent of the insulation fault A zero phase current transformer is connected to the relay and function as the sensor for sensing the leakage current All conductors of the circuit to be protected shall go through the ZCT While the self reclosing module provide multiple number of shots operation It also incorporates intelligent to differentiate the transient fault or persistent fault 2 3 LIGHT INDICATORS Trip Alarm FUNC DP1 DATA Saus LED LED display indicator display 0 0 0 0 0 No auxiliary supply 0 0 X X d Normal condition no tripping 0 B X X X Le
3. 9 RECORDS a Record the 3 latest tripped faults current or tSt for manual trip test b The records are stored in non volatile memory c To clear the entire record database e Step 1 When the relay is healthy press RESET button to step to most recent trip fault record or FUNC digit shown A e Step 2 Press A and Y buttons simultaneously and hold for 3 5s or the DATA show 0 It will clear the entire fault records database 10 TECHNICAL DATA AUXILIARY SUPPLY RECORDS MK330A 230A ceeees 184 276 VAC Fault PECOP cccsanccccctincetnainas 3 latest trip fault current or tSt MIR SSOAH TOA siccaccotececeaeadanas 94 127 VAC for manual trip test Rated frequency 50Hz or 60Hz SIOA GO Senne eee ere Non volatile memory VA Rating 3 VA typical SETTING RANGES DIGITAL INPUT PORT Sensitivity adjustment 30mA 50mA Remote reset 0 N O Dry contact 0 10 1 00A step 50mA 1 00 10 0A step 1 00A OUTPUT CONTACTS Delay time adjustment Instantaneous Contact PALIN Ge issosiezccancsonas 5A NO 3A NC AC1 0 1 3 0s step 0 1s Contact arrangement Change over Number OF SHOTS xccsiecexccencctccees 0 30 step 1 Expected electrical life 10 000 at rated current 0 Disable reclose function Expected mechanical life 5 000 000 operations Dead TING ecticincsiecteecsicudreteessics 1 500sec step 1sec Persistent fault time 0 500sec st
4. akage current gt 50 of the lAn 0 FB X X X Leakage current gt 85 of the lAn Trip delay time running 1 1 0 0 B Relay tripped 0 0 1 0 1 Scroll through setting 0 0 1 1 1 Scroll through records 0 0 B 0 1 DATA programming mode 1 1 X X Ct ZCT connection fault X X X X tSt Manual trip test X X X X Loc Transient fault lockout by reclose function X X X X PLo Persistent fault lockout by reclose function Table 1 Relay status displayed 1 0N 0 OFF X Don t care B Normal blink FB Fast blink PUSH BUTTONS OERATION a b c Integral Trip Test e Press the TEST button and hold for 3 5s to perform an integral test on the relay ranging from the analog sensing circuitry to output contacts of the relay as well as the relay indicators and display e During the testing process the first 2s is to simulate the pre fault alarm condition then follow by 1 5s testing on the trip time delay End of time delay relay trip Trip Reset Lockout Reset and ZCT Connection Fault Reset e Press the RESET button once or through digital input port e ZCT connection fault reset is inhabited if the fault is not rectify Parameters Viewing e When the relay is operate normal and no tripping press RESET button to step through the various parameters e When step through the parameters press RESET button and hold for 1 5 second to jump direct to the default FUNC FUNC DP 1
5. ay during lockout state Transient fault lockout When the number of self reclosing operations match the number of shots setting further fault trip will perform the lockout Persistent fault lockout Relay lockout when the tripping is initiated by the persistent fault Table 4 Self reclose function explanation a Shots Dead Time and Reclaim Time b Persistent Fault Monitoring Time Leakage l Leakage l Trip Safe Trip Safe Contact Contact l Dead Time DeadTime f Lo t l Reclaim Persistent rs es a ee Time Fault once 3 i l Lockout es Counter I
6. ection fault b To reset the relay make a connection between terminals 5 and 6 of the relay 5 OUTPUT CONTACTS a Trip Safe Contact e Activated and latch when the relay is in normal power up condition with the measured leakage current less than 0 85 lAn De activated during leakage trip manual test trip or ZCT connection fault b Programmable Contact DATA Pre fault Alarm Leakage Trip Manual Test Trip Re close Lockout ZCT Connection Fault 0 X X X X X 1 v v v v v 2 X X X X V 3 X V vV v x 4 X X X vV x 5 v v v v X 6 X X X vV v Table 3 Programmable contact selection table X Disable V Enable 6 SELF RECLOSE Terms Description Shots Nos of self reclosing operation before lockout Dead time Time when the trip safe contact de activated due to leakage fault or manual test trip to the time when the trip safe contact is activated by the recloser Persistent fault monitoring time Fault detected immediately after the trip safe contact is activated by the recloser is called persistent fault An time frame for monitor the persistent fault is called persistent fault time Reclaim time Time required by the recloser to reset back to initial state since the last reclose operation Lockout automatic reset time Time required for unlock and reset the self reclosing module during lockout state The unlock operation is carry out when no operators attended the rel
7. ep 1sec ZERO PHASE CURRENT TRANSFORMERS 0 Disable To operate with Mikro s ZCT series of current transformers Reclaim IMG 2ecesece cee ee tecesex 0 500min step 1min 0 Disable MECHANICAL Lockout self reset time 0 200hrs step 1 hour MOUITING ics sssnsnceierxeenetvnenbae Standard DIN 96x96mm panel 0 Disable mounting Programmable contact 0 6 step 1 Approximate weight 0 58kg excluding ZCT INDICATORS Pre fault Blan cscscctcctcarsiadasans Red indicator Leakage trip delay time Red indicator I lt 2 10 lt a eee nee 7 segment display and red indicators Manual test trip 00 7 segment display and red indicators ZCT connection fault 7 segment display and red indicators rip NS CONC Sars io veseseuatoscerrnetacs 7 segment display Real time leakage current 7 segment display 11 CONNECTION DIAGRAM AUX Gos ENOTE L1 L2 L3 N PE RESET MIKRO A CHD hed oe 2 ise The EARTH wire must not pass CONTACTOR through the ZCT TRIP SAFE ALARM l CONTACT CONTACT 5 i i 0 S G l y wie Cele 12 CASE DIMENSION domm 91 0 5mm Po E PANEL D ERONT CUTOUT 91 0 5mm MK330A Self Reclosing Earth Leakage Relay User s Manual A BRIEF OVERVIEW Self Reclosing Earth Leakage Relay a k CI TRIP b l C ALARM C J i d lAn A tLAR Hr cl At s RLY2 J sHots 1 Fit1 L DEAD s h Fit2 S C tPF s c Fit3 f E tREC min i
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