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.
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
Tripping curve
Dimensions(unit:mm)
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.
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 |
Why Choose CHAC
With 30+ years of manufacturing experience, 1100+ employees, 100M+ poles
annual capacity and 90% automated production, CHAC provides stable production capacity and strict
quality control for global OEM/ODM customers. Our in-house manufacturing system supports long-term
cooperation for electrical brands, importers and distributors.
30+
YEARS EXPERIENCE
Specialized in low-voltage electrical manufacturing
1100+
EMPLOYEES
Professional team ensures stable quality and delivery
100M+
POLES ANNUAL CAPACITY
Large-scale production capacity to meet global demand
90%
AUTOMATED PRODUCTION
Advanced automation for high efficiency and consistency
Automated Assembly Line
Testing Laboratory
Injection & Stamping
Quality Inspection
Strict quality control system ensures every product meets global standards.
What Can We Customize?
We support customization across branding, packaging, product appearance,
electrical specifications, certification requirements and engineering development. Whether customers
need private label products, market-specific parameters or new product development, CHAC can provide
flexible solutions based on project requirements.
Logo & Branding
Custom logo printing, laser marking and nameplate solutions.
Packaging
Customization
Customized color boxes, cartons, labels and manuals.
Electrical
Customization
Current, voltage, breaking capacity, trip curve and other
special functions.
Product
Appearance
Housing color, handle color and appearance customization.
Certification
Support
Products comply with international standards and market
requirements.
Engineering
Development
Drawing evaluation, prototype testing and mass production.
Download
PXB9 Series Miniature Circuit Breaker
Complete product overview for low-voltage electrical components and product selection reference.
Need Technical Documents?
Contact us for datasheets, certificates, drawings, selection guidance or OEM/ODM project support.
Frequently Asked Questions
Q1. Do you support product customization based on our design requirements?
A1:Absolutely. We specialize in OEM and ODM cooperation in the low-voltage electrical field and have provided customized services for many internationally renowned companies. We offer full-process support, including R&D design, parameter adjustments, and special material selection, ensuring the product fully meets your requirements.
Q2: What is your production capacity and Minimum Order Quantity (MOQ)?
A2: We operate a highly automated production base with an annual output of over 100 million poles for miniature circuit breakers. Our MOQ policy is flexible. We can provide competitive trial orders for small batches and dedicated production capacity guarantee plans.
Q3: What assurances are there for product quality and certifications?
A3: Our main products are certified with CCC, CE, CB, and more, and are sold in over 30 countries and regions worldwide. The company has established a dedicated Quality Operations Center that works with the business and production departments to implement full-process quality control, ensuring products meet international standards.
Q4: Do you have the capability for product R&D and turning concepts into reality?
A4: We have a complete R&D team and digital workshops, backed by extensive customization experience serving numerous international clients. From concept proposal and sample development to mass production, we provide end-to-end technical support to help bring your ideas to life.
