With the function of test MU accuracy,time characteristcs,state mark,packet loss rate,harmonic analysis,signal analysis, voltage and current phase detection, transient characteristic verification. Can test all aspects of MU functions and performance.
Except MU test and traditional protection relay by analog input, KF920 also can test IED in intelligent substation which comply with IEC61850 standard.
7 phase voltage and 6 phase current output, Maximum voltage is 310V/phase. Maximum current is 32A/phase(Max 192A in parallel six phase), 13 channel low-level signal output.
Analog signal sampling use industrial-grade high-precision ADC, output accuracy can reach 0.05%. Absolute delay, time jitter test accuracy is better than 1μS.
Perfect self-test and prompt. The system is stable ,device performance will not be changed by long time running; The system can detect abnormal situation and give warning.
12.1 inch touch sreeen, Built-in windows operating system. Compact structure, safe and easy to portable
Can be used as a record and waveform analyzer.

Built-in high-precision analog amplifier, Which can provide 6 × 32A AC current source and 7 × 310V AC voltage source.
Built-in 100M fiber Ethernet port(2 Pairs,LC Type) and IRIG-B Port(In/Out).
Provide merger unit accuracy test function (Amplitude error, Phase error, etc.).
Simulate Binary I/O signal (Hard contact or GOOSE), Which comply with merger unit voltage switching,voltage parallel logic function test.
Can test Merger Unit time characteristcs ,such as time sending accuracy,time receiving accuracy.
Have Message analysis and statistics function which can real-time analyze merger unit output SMV, GOOSE message. Have Protocol consistence test and abnormal message check and statistics function.
Can test Merger Unit self-check and error handling mechanism through sampling quality,signal mark in GOOSE , warning information define in Goose signal.
Real-time display waveform,binary state and previous switch trip time in message electrical parameter. Mark time scale in SV message through hardware to count and evaluate time dispersion of merger unit SV message.
Record message data in 1 minute, analyze/compare time scale and amplitude data of each sampling point, display amplitude and time scale statistical results of error distribution curve and Max error.

Current output	—	6×32A/phase
Current accuracy	—	≤±0.05%(0.2A～32A)； ≤±0.1mA(0.05A～0.2A)
Current resolution	mA	1
Current maximum power	—	≥160VA/phase (6×32A/phase)
Current Rise And Fall Time	µs	<100
Current frequency range	Hz	1 ～1000
Current amplitude and frequency characteristics	—	Amplitude≤±0.2% (10Hz～45Hz),(65Hz～450Hz)； Amplitude≤±0.05% (45Hz～65Hz)； Amplitude≤±0.5% (450Hz～1000Hz)
Current output time	—	＜5A/phase,continuous output ； 5 ～32A/phase,＞180s
Voltage output	—	7×310V/phase
Voltage accuracy	—	≤±0.05%(4V～310V)； ≤±0.2mV (0.5V～4V)
Voltage resolution	—	1 mV(0.2V～10V), 10 mV(10V～310V)
Voltage maximum power	—	≥60VA/phase, 7×310V/phase
Voltage rise and fall time	µs	<100
Voltage frequency	Hz	1～1000
Voltage amplitude and frequency characteristics	—	≤±0.2% (10Hz～45Hz),(65Hz～450Hz)； ≤±0.05% (45Hz～65Hz)； ≤±0.5% (450Hz～1000Hz)
Voltage amplifier output time	—	Norminal voltage condition, output continuous
Synchronization time of Current and voltage output	—	≤10µs
Frequency range	Hz	1～1000
Frequency accuracy	—	＜0.5mHz (1Hz～65Hz) ＜5mHz(65Hz～450Hz) ＜10mHz(450 Hz～1000Hz)
Frequency resolution	Hz	0.0001
Harmonic	—	Harmonic and DC can be superimposed 2 to 25 times amplitude (less than the rated value)
Phase range	—	0～359. 9°
Phase accuracy	—	±0.05°
Phase resolution	—	0.01°
Low level analog output channel	—	13 channels
Low level analog output range	—	AC:0～8Vrms(Effective value)
Low level analog maximum current	—	≥1mA
Low level analog output accuracy	—	＜0.1mV(0.1～0.2Vrms) ＜0.05%(0.2～8 Vrms)
Low level analog output amplitude and frequency characteristics	—	≤±0.1%～0.5% (1Hz～1kHz)
Low level analog output resolution	—	≤250µV
Digital output voltage	—	IEC61850-9-1,IEC 60044:Rated voltage parameter11585(0X2D41)； IEC61850-9-2: Digital 1 is 10mV
Digital output current	—	IEC61850-9-1,IEC 60044: Rated protection current463(0X 1CF),Rated measurementcurrent 11585(0X2D41)； IEC61850-9-2: Digital 1 is 1mA
Synchronization signal	—	B-code sending ports ≥ 2pcs； B-code receiving ports ≥ 1pc； PPS receiving ports ≥ 1pc； GPS Port : 1pc； Synchronization accuracy>0.5us
Test system accuracy	—	0.03%；resolution:0.0001%,0.01´
Test verification Class	—	0.2S
Electronic transformer and MU delay test	—	accuracy＜2us
MU delay jitter test	—	accuracy＜2us
MU transient delay accuracy	—	accuracy＜10us
GOOSE receiving time	—	accuracy＜0.1ms
Binary I/O receiving time	—	accuracy＜0.1ms
Power supply	—	100V～260V (AC),DC 125-350V Frequency Range:43～57Hz
Operating temperature		-10～+50℃
Humidity		5～95%,non-condensing
Storage and transport temperature		-20～+70℃
Altitude		≤4000m
Dimension		358mm×149mm×297mm
Weight		<18kg

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