UPA-1

Automatic circuit breaker tester up to 1 kA

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Automatic circuit breaker tester UPA-1 is designed for testing and ampere-second characterization of automatic AC current circuit breakers. The device allows registering the value of the supplied current and timing the automatic circuit breaker switching interval.

Primary current injector UPA-1 is a mobile device, which could be easily transported to a required testing location.

Primary current injector UPA-1 operates on the principle of varying the power in the primary circuit of the matching power transformer and, respectively, varying the output current, flowing through the automatic circuit breaker under the test. Power regulation could be done either through an external regulator (RNO or VR) or through a built-in thyristor controller.

Technical Specifications
Characteristic
Value
Single-phase AC power supply voltage, V 
220±22
Power supply frequency, Hz
50±1
Maximum output current when powered from 220 V AC circuit, kA
1,2
Test current measurement range, kA
0,10…1
Reduced error of the test current measurement, %
±3
Absolute error of the current flowing time and the switching off time measurement in the range from 50 ms to 990 ms, ms, max
±20
Reduced error of the current flowing time and the switching off time measurement in the range from 1 s to 7200 s, %, max
±3
Continuous running time under the maximum current, s, min
10
Maximum consumed power, kVA
5
Net weight of IT-1 (current supply), kg, max
13
Net weight of the control unit (without flexible busbars), kg, max
3
Net weight of the flexible busbar (length 1 m, cross-section 110 mm2), kg, max
1,2
Dimensions of the control unit, mm, max
340х210х140
Dimensions of the IT-1, mm, max
250х220х115
Lifespan, years, avg
10
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