Standard knowledge of miniature circuit breaker & earth leakage circuit breaker
1. Standard of miniature circuit breaker:
GB10963.1-2005
2. Standard of earth leakage circuit breaker:
GB16917.1-2003.
3. Product logo introduction:
4. Temperature rise: The components of the miniature circuit breaker & earth leakage circuit breaker can’t be overheated during use, the specific requirements are shown in the table below:
| Parts | Temperature rise / K |
| Wiring terminals for connecting external conductors | 65 |
| During the manual operation of RCBO, the external parts that are easily accessible include the operating parts of insulating material and the metal parts connecting the insulating operating parts of each pole | 40 |
| External metal parts of operating parts | 25 |
| Other external parts, including the surface where the RCBO is in direct contact with the mounting plane | 60 |
5. Long delay test:
Time - current operating characteristics
| Test | Type | Test current | Initial state | Trip or non-trip time limit | Expected results | Notes |
| a | B,C,D | 1.13 In | Cold state | t≥1 h ( In≤63A) t≥2 h ( In＞63A) | No trip | |
| b | B,C,D | 1.45 In | Following test (a) | t＜1 h ( In≤63A) t＜2 h ( In＞63A) | trip | The current rises steadily to the specified value within 5s |
6. Short delay test (overload):
| c | B,C,D | 2.55 In | Cold state | 1s＜t＜60s ( In≤32A) 1s＜t＜120s ( In＞32A) | trip |
7. Transient test (short circuit):
| Test | Type | Test current | Initial state | Trip or non-trip time limit | Expected results | Notes |
| d | B,C,D | 3 In 5 In 10 In | Cold state | t≥0.1 s | No trip | Turn on the current by closing the auxiliary switch |
| e | B,C,D | 5 In 10 In 50 In | Cold state | t＜0.1 s | trip | Turn on the current by closing the auxiliary switch |
Full knowledge of the miniature circuit breaker and earth leakage circuit breaker can help us use them better.