5000A TEST-905 current injecter primary primary injection test system with small cart and 15KVA Power

5000A Primary Current Injection Test System with small cart and 15KVA Power

TEST-905 primary current injection test system adopts ARM chip to control the output process and large capacity of toroidal transformer. It is equipped with LCD screen display current meter, also showed primary current value, secondary current value, turn ratio and the phase shift. Aluminum alloy body with PC panel component the shell.
TEST-905 is mainly applied to test CT turn ratio and polarity in the power system, the contact resistance, high voltage circuit breaker protection test and high voltage generator test etc, which need large current on-site or in the lab.

• Permanent current up to 5000 A, 15KVA
• Max current output up to 5500A.
• Built-in digital ammeter 0.5% accuracy.
• Built-in digital timer resolution 1 ms (Optional).
• Made up of two units, control and power unit
• Thermal and short-circuit protection.
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Typical applications of primary injection testing

Besides the trip test of the complete loop to determine the integrity of the whole secondary protection circuit, other typical primary injection testing applications are:

• Checking that the MV/HV/LV circuit breakers trip in response to an overcurrent.
• Checking of CT/VT/PT ratios and polarities, to determine that the relationship between primary current and secondary current seen by the relay is correct.
• Checking the correct wiring of the protection system, and that all protective devices are properly connected.
• Checking of overcurrent and earth fault relays through primary injection testing.
• Checking of CT circuits, to verify that all switches and protective relays receive the proper current at the proper angle as expected.
• Testing of reclosers and sectionalizers.
• Thermal tests on busbars, switchgear and electrical panels.
• Testing ground grid installations.