CQB5aL-63 4.5kA Residual Current Operated Circuit Breaker with Over-current Protection
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·Overload protection
·Short circuit protection
·Protect people against indirect contacts and additional protection against direct contacts.
·Protect installations against fire hazard due to insulation faults.
·High-quality residual current device
·Wide variety of rated tripping currents
Suitable for industrial, commercial, high-rise and civil residences circuit protection.
1 Overview and applications
·Overload protection
·Short circuit protection
·Protect people against indirect contacts and additional protection against direct contacts.
·Protect installations against fire hazard due to insulation faults.
·High-quality residual current device
·Wide variety of rated tripping currents
Suitable for industrial, commercial, high-rise and civil residences circuit protection.
2. Type designation
3 Technical data
| Specifications | |
| Rated voltage (V) : | 230V~/400~ |
| Rated current (A) | 10、16、20、25、32、40、50、63 |
| Rated sensitivity lrn (mA) | 30、50、100 |
| Rated residual non-operating current | 0.5 lrn |
| Poles | 1P+N、2P、3P+N、4P |
| Rated breaking capacity lcu(A) | 4500 |
| Rated residual making and breaking capacity lr m | 2000A |
| Tripping characteristic | Table 2 |
| Mechanical &Electrical life | Mechanical ≥ 4000 ；Electrical≥ 2000 |
| Pollution degree | 2 |
| Protection class | IP20 |
| Overvoltage category | Ⅲ |
| Standards | IEC61009-1、GB/T16917.1 |
| Compliant certification | CCC |
Table 2 Tripping characteristics
| Rated current(A) Test current Initial status Tripping time Expected result Remarks | |||||
| ≤63 | 1.13In | Cold | t≤1h | Non-tripping | |
| ≤63 | 1.45In | Following previous test | t＜1h | tripping | Current smoothly rises to specified value in 5s |
| ≤63 | 2.55In | Cold | 1s＜t＜60s(In≤32A) 1s＜t＜120s(In＞32A) |
tripping | |
| ≤63 | 3In | Cold | t≤0.1s | Non-tripping | B |
| 5In | t＜0.1s | tripping | |||
| 5In | t≤0.1s | Non-tripping | C | ||
| 10In | t＜0.1s | tripping | |||
| 10In | t≤0.1s | Non-tripping | D | ||
| 20In | t＜0.1s | tripping | |||
Note: The status “cold ” means that the test is carried out at a reference calibration temperature without load before the test.
4 Order Specifications
·When ordering circuit breakers, the following points should be specified:
A) Product models, such as CQB5aL-63;
B) Poles of circuit breakers, such as (1P+N);
C) Rated current of circuit breakers, such as 16A、20A、25A;
D) Rated residual operating current, such as 30mA;
E) Order quantity, such as 100 pcs
·Purchase order template
CQB5aL-63 1P+N C/16A 30mA 100pcs
5 Conductor requirements and cross-sectional area
| Rated current （A） | Nominal cross-sectional area（mm2） |
| ≤10 | 1.5 |
| 16~20 | 2.5 |
| 25 | 4 |
| 32 | 6 |
| 40~50 | 10 |
| 63 | 16 |
6.Dimensions and installation sizes (mm)
