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CQB71R-100 Series Electricity Meter External Circuit Breaker
The CQB71R-100 series meter socket circuit breaker is designed by CHAC Electric to provide overload and short-circuit protection for metering applications. By detecting the power meter control signal, it automatically controls the connection or disconnection of the load, achieving automatic load break for unpaid usage and automatic load make for paid usage. Our CQB71R-100 series ensures reliable and efficient operation, providing a robust solution for utility meter control and protection.
Product Overview
The CQB71R-100 electric energy meter external circuit breaker has short-circuit overload protection. It automatically controls the connection or disconnection of the load by detecting the meter control signal, realizing automatic control of opening the circuit breaker for arrears and closing the circuit breaker for payment. It meets national standards including State Grid Q/GDW11421 “Technical Specification for Meter Socket Circuit Breakers”, China Southern Power Grid “Technical Specification for External Circuit Breakers of Fee-Controlled Meters”, and GB/T10963.1 “Circuit Breakers for Over-Current Protection in Households and Similar Applications”.
Main parameters and technical performance
| Technical parameter items | Parameter value |
| Rated voltage (V) | 230V |
| Rated current (A) | 40、63、80、100 |
| Rated impulse withstand voltage Uimp(V) | 6000V |
| Rated frequency | 50Hz/60Hz |
| Number of poles | 1P+N |
| Rated short-circuit capacity Icn(A) | 6kA |
| Operating short-circuit capacity Ics(A) | 6kA |
| Mechanical and electrical life (times) | Mechanical life≥10000, electrical life≥6000 |
| Instantaneous trip type | B、C、D |
| Tightening torque (Nm) | 2.5 |
| Automatic closing time (tc) | t≤3s |
| Automatic opening time (td) | t≤2s |
| Pollution level | Level 2 |
| Protection level | Ip20 |
| Installation Category | III |
| Comply with standards | IEC60898-1、GB/T10963-1 |
| Certification | CCC |
Overcurrent protection characteristics (reference temperature 30°C)
| Serial number | Type | Test current (A) | Starting state | Tripping or non-tripping time limit | Expected Results | Remark |
| a | B、C、D | 1.13In | Cold | t≤1h(In≤63A) t≤2h(In>63A) |
No tripping | The current rises steadily to the specified value within 5s |
| b | B、C、D | 1.45In | Following experiment a | t<1h(In≤63A) t<2h(In>63A) |
Trip | |
| c | B、C、D | 2.55In | Cold | 1s<t<60s(In≤32A) 1s<t<120s(In>32A) |
Trip | |
| d | B | 3In | Cold | t≤0.1s | No tripping | Turn on the power by closing the auxiliary switch |
| C | 5In | |||||
| D | 10In | |||||
| e | B | 5In | Cold | t<0.1s | Trip | Turn on the power by closing the auxiliary switch |
| C | 10In | |||||
| D | 20In |
NOTE: Term: “Cold” means that the test is conducted without load and at the reference calibration temperature.
Tripping curve
Wire requirements and copper wire cross-sectional area
| Cross-sectional area S(mm²) | Rated current value In(A) |
| 10 | 32<In≤50 |
| 16 | 50<In≤63 |
| 25 | 63<In≤80 |
| 35 | 80<In≤100 |
| 50 | 100<In≤125 |
Dimensions(unit:mm)
Ordering Specifications
When ordering a circuit breaker, please specify the following:
a) Product model, such as CQB71R-100;
b) Number of poles of the circuit breaker, such as 1P+N;
c) Instantaneous tripping type, such as B, C, D;
d) Rated current of the circuit breaker, such as 40A, 63A, 80A, 100A;
e) Order quantity, such as 100 units.
Order:
CQB71R-100 1P+N C/100A 100 pieces
