The MK2200 combined overcurrent and earth-fault relay is a digital microprocessor based relay. This relay employs extensive advance numerical techniques implemented Functions
1 Phase Overcurrent Protection
When the phase current exceeds the low-set I> setting value, the overcurrent low-set element starts and delivers a start signal to rcurrent & Earth Fault RelayMK2200in real-time, for the computation of measured input quantity. Other advance features include programmable control output, metering and fault data recording.
ApplicationThe MK2200 combined overcurrent and
earth-fault relay is used where time graded overcurrent and earth fault protection is
required.
Features
• Multifunction numerical relay
• Three-phase, low-set and high-set phase overcurrent• Two sets of low-set and high-set setting
for phase overcurrent• Low-set and high-set earth fault• Two sets of low-set and high-set setting for earth fault• Four selectable IDMT characteristic curves• Definite time for low-set and high-set• Numeric display of phase and earth fault currents• Display of relay settings
• 9 non- volatile records of previous trip-ping currents• Recording of relay start time• Highly flexible programmable relay outputs• Multifunction external digital input• Isolated RS485 Modbus - RTU communication• Selectable 50 Hz / 60 Hz
the display panel and a group of preassigned evOrelay outputs. After a delay time, determined deby the inverse time current characteristic nibcurve selected and the measured current or moby definite time t>, this overcurrent element Coperates and delivers a trip signal to the
0display panel and a group of relay outputs
02that are configured to link to the low-set
2Kphase overcurrent tripping.
MWhen the phase current exceeds the high-set I>> setting value, the overcurrent high-set element starts and delivers a start signal to the display panel and a group of preassigned relay outputs. After a preset time, determined by t>>, this overcurrent
element operates and delivers a trip signal to the display panel and a group of relay
outputs that are configured to link to high-set phase overcurrent tripping.
2 Earth-Fault Protection
When the earth-fault current exceeds the low-set Io> setting value, the earth-fault low-set element starts and delivers a start signal to the display panel and a group of preassigned relay outputs. After a delay time, determined by the inverse time current characteristic curve selected and the measured current or by definite time to>, this earth-fault element operates and delivers a trip signal to the display panel and a group of relay outputs that are configured to link to the low-set earth-fault tripping.When the earth-fault current exceeds the high-set Io>> setting value, the earth-fault high-set element starts and delivers a start signal to the display panel and a group of preassigned relay outputs. After a preset time, determined by to>>, this earth-fault element operates and delivers a trip signal to the display panel and a group of relay outputs that are configured to link to high-set earth-fault tripping.
3 Low-set Characteristic Curves
The inverse definite minimum time (IDMT) characteristic curves in MK2200 comply with BS142-3 and IEC60255-3. The selectable curves and characteristics are:• Normal inverse • Very inverse• Extremely inverse • Long-time inverse• Definite time
Technical Data
INPUTS Measuring input: Rated current In : 1 A or 5 ARated frequency : 50 or 60 HzThermal withstand : 4 x In continuous 25 x In for less than 10 sec 100 x In for less than 1 secBurden : < 0.3VA at InOUTPUTS5 programmable contacts +1 IRF contact:Rated voltage Continuous carry Make and carry for 0.2 s : 250 V AC/DC: 5 A: 30 AContact specification:Expected electrical life : 105 operationsExpected mechanical life : 5 x 106 operations4 High-set Characteristic
The high-set is selectable between definite time and instantaneous tripping characteristic.Rated auxiliary voltage:Model MK2200-150D Model MK2200-240A Model MK2200-240AD : 24~150 V DC: 198~265 V AC: 85~265 V AC 110~340 V DCACCURACYProtection thresholds : ± 3%Time delay : ± 2% with a minimum of 30 msMeasurements : ± 3%Reset ratio : 95% typicalOvershoot time : less than 30 ms typical22005 External Binary Input
The functions of the external binary input are: • Blocking the operation of one or more protection stages. • Remote trip reset.
• Changing of protection group settings. • Tripping the MK2200 by an external device.
Power consumption:AC auxiliary voltage DC auxiliary voltage : 6 ~ 10 VA typical: 5 ~ 9 W typicalBinary Input:External binary input : 18 ~ 265 V DC 85 ~ 265 V ACENVIRONMENTAL CONDITIONSTemperature : -5˚C to +55˚CHumidity : 56 days at 93% RH and 40˚C non-condensing6 Relay Output
There are five relay outputs that can be programmed to respond to the relay start signal, the trip signal, or both the start and trip signals. The sixth relay output functions as internal relay failure indicator.EARTH-FAULT ELEMENTLow-set setting I o> : 0.05 ~ 1.0 x In , step 0.01High-set setting I o>> : 0.05 ~ 10.0 x In , step 0.05Time multiplier kt o> : 0.02 ~ 1.0 , step 0.01Low set definite time t o> : 0 ~ 300 s 0 ~ 10.0s : step 0.01High set definite time t o>> : 0 ~ 300 s 10.0 ~ 100s : step 0.1 100 ~ 300s : step 17 Configuration
The configuration of the relay is accomplished by software switches settable by the user from the front panel.OVERCURRENT ELEMENTLow-set setting I > High-set setting I >> Time multiplier kt > Low set definite time t > High set definite time t >> : 0.10 ~ 2.50 x In , step 0.01: 0.10 ~ 40 x In , step 0.05 ( 0.1 ~ 10 In ), step 0.1 ( 10 ~ 40 In ): 0.02 ~ 1.0 , step 0.01: 0 ~ 300 s 0 ~ 10.0s : step 0.01: 0 ~ 300 s 10.0 ~ 100s : step 0.1 100 ~ 300s : step 18 Metering and Fault Record
This function enables the values of the phase current and the earth-fault current to be viewed by the user. In addition, the user can also views the measured values of the phase current and earth-fault current recorded at the moment of fault for the previous 9 fault records stored in non-volatile memory.COMMUNICATIONRS485 Modbus - RTUTests And Standards
High voltage dielectric withstand test IEC60255-5 High voltage impulse test IEC60255-5
Electrical fast transient IEC61000-4-4, Level 4, power supply inputs Electrical fast transient IEC61000-4-4, Level 4, other inputs Electrostatic discharge IEC61000-4-2, Class III, air discharge
Electrostatic discharge IEC61000-4-2, Class III, contact discharge 1MHz Burst Disturbance IEC60255-22-1
Enclosure protection when panel mounted
2.0 KV rms, 1 min5 KV, 1.2/50ms4 KV, 5/50ns2 KV, 5/50ns8 KV6 KV
2 KV Common mode1 KV Differential modeIP54
NORMAL INVERSEt/s10
k
1.00.90.80.70.61
0.50.40.30.2
0.1
0.1
0.05
11020
I/I > EXTREMELY INVERSEt/s
100
10
1
k
1.00.80.1
0.60.50.40.30.050.10.2
0.01
110
20I/I > VERY INVERSEt/s
10
1
k
1.00.80.60.50.40.30.2
0.1
0.10.05
0.01
11020
I/I > LONG-TIME INVERSEt/s
200100
10
k
1.00.80.60.50.40.3
1
0.20.10.05
0.1
11020
I/I > 0022 TYPICAL APPLICATION DIAGRAM 1 CASE DIMENSIONS142 mmrcurrent & Earth Fault RelayL1L2L312345678COM5 A1 ACOM5 A1 ACOM5 A3436353837403942Trip ContactR1165 mmR2FrontR3evR4O91 A41 de10COM115 A27ni26R5bm121 Ao28CExternal1330InternalBinary29Relay0Input1422Failure0Termination Resistor23223N-RS485224P+Kinput UauxAuxiliary33M3125CommunicationCable Shield TYPICAL APPLICATION DIAGRAM 2L1L2L3N1COM3425 A36Trip Contact31 A35R14COM3855 A37R261 A407COM39R385 A4291 A41R410COM115 A2726R5121 A28External1330InternalBinary29RelayInput1422FailureTermination Resistor3223N-RS485input UauxAuxiliary3324P+3125CommunicationCable Shield Ordering Information
MODEL DESCRIPTIONMK2200 - 150D For 50/60 Hz system, auxiliary voltage 24 ~ 150 V DCMK2200 - 240A For 50/60 Hz system, auxiliary voltage 198 ~ 265 V ACMK2200 - 240AD For 50/60 Hz system, auxiliary voltage 84 ~ 265 V AC or 110 ~ 340 V DC198 mm34 mmmm 6Side31129 1 mmmm 1 Panel Cutout931
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