UPA-20

Automatic circuit breaker tester up to 20 kA

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Automatic circuit breaker tester UPA-20 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 injection tester UPA-20 is a mobile device, which could be easily transported to a required testing location.

Primary current injection tester UPA-20 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
AC power supply voltage, V 
220±22 or 380±38
Power supply frequency, Hz
50±1
Maximum output current when powered from 220 V circuit, kA
14
Maximum output current when powered from 380 V circuit, kA
20
Test current measurement range, kA
3…20
Range of measurements of the test current supply time, s
1…7200
Range of measurements of the test current supply time, ms
50…990
Reduced error of the test current measurement, %
±3
Reduced error of the measurement of the current flow duration and switching off time, %, max
±3
Continuous running time under the maximum current, s, min
10
Maximum consumed power, kVA
55
Net weight of IT-20 (current supply), kg, max
80
Net weight of the control unit (without flexible busbars), kg, max
20
Dimensions, mm, max
960х680х400
Lifespan, years, avg
10
 
Package Contents
Component
Quantity
UPA-20 control unit
1
Current source IT-20
1
Mobile trolley
1
Flexible busbar with cross-section 110 mm2 (length 1 m)
8
Flexible busbar with cross-section 110 mm2 (length 2 m)
6
Grounding cable cross-section 13 mm2 (length 5 m)
1
Collector
2
RNO connection outlet
1
RNO (Inom = 120 A)
Optional*
Cable for connecting RNO to UPA-20
Optional
Documentation
User’s Manual
1
  • * Delivery terms of RNO are discussed separately.

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