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CQB7R-125 Series Prepaid Energy Meter External Circuit Breaker
Product Overview
The CQB7R-125 series prepaid meter circuit breaker is designed by CHAC Electric for use in AC 50Hz systems with a rated voltage of 230/400V and a rated current up to 125A. It serves as the main switch with overload and short-circuit protection. Equipped with a microprocessor-based ultra-compact intelligent electric operator, it automatically controls the tripping or closing of the circuit breaker by detecting the power meter control signal. When used with prepaid meters, it enables automatic load break for unpaid usage and automatic load make for paid usage.
Main parameters and technical performance
| Technical parameter items | Parameter value |
| Rated voltage (V) | 230V |
| Rated current (A) | 40、50、63、80、100、125 |
| Rated impulse withstand voltage Uimp(V) | 6000V |
| Rated frequency | 50Hz/60Hz |
| Number of poles | 2P、4P |
| Rated short-circuit capacity Icn(A) | 6kA,10kA(High breaking type) |
| Operating short-circuit capacity Ics(A) | 6kA,7.5kA(High breaking type) |
| Mechanical and electrical life (times) | Mechanical life≥10000, electrical life≥6000 |
| Instantaneous trip type | B、C、D |
| Tightening torque (Nm) | 3.5 |
| 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 CQB7R-125;
b) Number of poles of the circuit breaker, such as 2P, 4P;
c) Instantaneous tripping type, such as B, C, D;
d) Rated current of the circuit breaker, such as 40A, 50A, 63A, 80A, 100A, 125A;
e) Order quantity, such as 100 units.
Order:
CQB7R-125 2P C/100A 100 pieces
