Standard knowledge of miniature circuit breaker & earth leakage circuit breaker

- May 10, 2020-

Standard knowledge of miniature circuit breaker & earth leakage circuit breaker

Standard knowledge of miniature circuit breaker and earth leakge circuit breaker 1


1. Standard of miniature circuit breaker:

GB10963.1-2005

 

2. Standard of earth leakage circuit breaker:

GB16917.1-2003.

 

3. Product logo introduction:

Standard knowledge of miniature circuit breaker and earth leakge circuit breaker 2

 

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 pole40
External metal parts of operating parts25
Other external parts, including the surface where the RCBO is in direct contact with the mounting plane60


5. Long delay test:

Time - current operating characteristics

TestTypeTest currentInitial stateTrip or non-trip time limitExpected resultsNotes
a
B,C,D1.13 InCold state

t≥1 h ( In≤63A)

t≥2 h ( In>63A)
No trip
bB,C,D1.45 InFollowing test (a)

t<1 h ( In≤63A)

t<2 h ( In>63A)
tripThe current rises steadily to the specified value within 5s


6. Short delay test (overload):

cB,C,D2.55 InCold state

1s<t<60s ( In≤32A)

1s<t<120s ( In>32A)
trip


7. Transient test (short circuit):

TestTypeTest currentInitial stateTrip or non-trip time limitExpected resultsNotes
dB,C,D

3 In

5 In

10 In
Cold statet≥0.1 sNo tripTurn on the current by closing the auxiliary switch
e
B,C,D

5 In

10 In

50 In
Cold statet<0.1 stripTurn 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.