Circuit Breaker Time-Delay Characteristic Calibration System

The reliability, safety, accuracy, and operational responsiveness of circuit breakers directly impact the performance of the overall equipment. As domestically produced electrical components become increasingly sophisticated, standard testing equipment is no longer capable of evaluating product performance under extreme conditions. Furthermore, operating environments often preclude regular maintenance and calibration.

Scope of Application

Verification of operating characteristics for AC and DC circuit breakers;
Full-range current calibration and short-time withstand current testing for current transformers;
Full-range current calibration and short-time withstand current testing for current sensors;

Technical specifications

1) AC output current and duration
Output current: ≤ AC 50,000 A, duration: ≤ 3.0 s
Output current: ≤ AC 20,000 A, duration: ≤ 10 s
Output current: ≤ AC 10,000 A, duration: ≤ 15 s
Output current: ≤ AC 5,000 A, duration: ≤ 30 s
2) DC output current and duration
Output current: ≤ DC 50,000 A, duration: ≤ 3.0 s
Output current: ≤ DC 20,000 A, duration: ≤ 10 s
Output current: ≤ DC 10,000 A, duration: ≤ 15 s
Output current: ≤ DC 5,000 A, duration: ≤ 30 s
3) Automatic current stabilization accuracy (error): ≤ 1.0%.
4) Current measurement accuracy (error): ≤ 0.5%.
5) Current output error during circuit breaker instantaneous trip testing: ≤2%.
6) AC current output waveform distortion rate: ≤3% (at 50 Hz), excluding non-periodic components.
7) DC current output ripple factor: ≤1%; pulsation factor: ≤1%.
8) Timing error: ≤1 ms.
9) AC output stabilization time: ≤12 ms (shorter times available upon request).
10) AC output transition time: ≤12 ms (shorter times available upon request).
11) System cooling method: Natural cooling or forced-air cooling.
◎ Output current can be extended up to AC/DC 100 kA.