TEST-905 5000A Circuit Breaker Testing Primary Current Injection Test System

primary current injection test system

TEST-905 5000A primary current injection test system adopts 32bit ARM chip to control the output process and large capacity of toroidal transformer. It can output up to 5500A, timer from 0 to 999.999s, and equipped with LCD screen display ammeter, also showed primary current value, secondary current value, current transformer turn ratio and circuit breaker of the action time. Aluminum alloy body with PC panel component the shell. TEST-905 primary current injection test equipment is mainly applied to test CT turn ratio and polarity in the power system, the contact resistance, protection relay, low voltage & high voltage circuit breaker protection test and high voltage generator test etc, which need large current on-site or in the lab. This primary injection test equipment can be used as cable temperature rise testing equipment.



  • Quick and easy to use;
  • With 6m large current cable;
  • With CT ratio test function;
  • Portable designed with pulley;
  • Max current output up to 5500A;
  • Permanent current up to 5000 A, 30KVA;
  • Built-in digital ammeter 0.5% accuracy;
  • Built-in digital timer, resolution 1 ms;
  • Made up of two units, control and power unit;
  • Thermal, short-circuit and overload protection;


  • Switchgear testing
  • Ground Grid testing
  • Circuit Breaker testing
  • Temperature rise testing
  • Protective Relay testing
  • Current Transformer Testing
  • Recloser and Sectionalizers
  • 5000A Primary injection tests


Electrical parameters 
Accuracy ±0.5%
Power Supply(AC) 380V±10%·80A, 50Hz/60Hz
Current Output (AC) 5000A·5V or 2500A·10V
Capacity 30KVA
The current output waveform distortion ≤5%
Primary current 
Range 0-5500A
Resolution 0.1A
Accuracy <0.5%
Secondary measurement 
Range 0-6A
Resolution 0.001A
Accuracy <0.5%
Current duration 
5000A range 5000A     2-3minutes
2500A      3-6minutes
2500A range 2500A      2-3minutes
Continuous output 0-2000A
With timer(Optional)
Range 0.0001~999.999S
Resolution 0.001S
Accuracy <0.2% ±5 words
Standard IEC61010-1;IEC 61326-1
Communication port RS232
Cable length 8x4m, 120mm²
Mechanical parameters 
Dimensions (W×D×H) (mm) 430×430×445 and 550×450×600
Weight(kg) Control Host 68kg,
External voltage regulator weight 55kg
Environmental conditions 
Operating Temperature -10°C to 50°C
Storage Temperature -40°C to 70°C
Relative humidity ≤95%, on-condensing

Selection Guide

 Model ACCU
TEST-200 0.5% 0-250A YES YES 2KVA 200A: 2-3min;100A:3-6min 340×270×250 22.5KG Integrated structure
TEST-901 0.5% 0-1100A YES YES 5KVA 1000A: 2-3min;
430×260×260 25KG Integrated structure
TEST-902 0.5% 0-2200A YES YES 12KVA 2000A:2-3min;
360×300×295 and 320×300×300 35KG+15KG Fission structure
TEST-903 0.5% 0-3300A YES YES 15KVA 3000A:2-3min;
380×350×360 and 340×290×420 48KG+42KG Fission structure
TEST-905 0.5% 0-5500A YES YES 25KVA 5000A:2-3min;
430×430×445 and 550×450×600 68KG+55KG Fission structure

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