2026-10-30
Miniature Circuit Breakers (MCBs) are widely used in electrical installations to provide protection against overloads and short circuits. To verify their protective performance, it is essential to test both delayed tripping characteristics and instantaneous tripping characteristics in accordance with IEC 60898-1.
Sinuo's IEC 60898-1 MCB Testing Machine for 3–63A Circuit Breakers is designed to evaluate these two key protective functions using controlled sine-wave current output.
The delayed tripping test evaluates whether an MCB can operate correctly under specified overload conditions within the required time limits.
The testing system applies controlled overload currents to the circuit breaker and monitors its tripping time. This helps verify whether the MCB provides reliable protection against prolonged overcurrent conditions.
The instantaneous tripping test evaluates the circuit breaker's response to high short-circuit current conditions.
The equipment provides high-current output to test whether the MCB trips within the specified time according to its applicable tripping characteristic. Accurate current control and stable output are important for obtaining reliable test results.
The testing machine adopts sine-wave AC current output, helping provide stable and controlled current during delayed and instantaneous tripping tests.
It is designed for testing miniature circuit breakers with rated currents from 3A to 63A. The configuration can accommodate different pole numbers and testing requirements.
In addition to its main tripping characteristic tests, the equipment can also be configured to perform temperature-rise testing.
Sinuo provides MCB testing equipment designed around applicable standards, rated current ranges, pole configurations, and laboratory testing requirements.
Whether you need a dedicated delayed and instantaneous tripping test system or a more comprehensive MCB testing solution, we can discuss a suitable configuration based on your testing needs.
Contact Sinuo to learn more about IEC 60898-1 MCB testing equipment for 3–63A miniature circuit breakers.
