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Terminal Power Distribution
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- Residual Current Operated Circuit Breaker (RCCB)
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CQB7DC-63 series DC Miniature Circuit Breakers
Product Overview
These DC MCBs are perfect for DC distribution systems with a rated voltage up to 1000V and a rated current up to 63A, featuring a rated short - circuit breaking capacity of up to 6000A. They work as protection devices in distribution circuits for infrequent connection, disconnection, and switching. With overload and short - circuit protection, plus auxiliary function modules like auxiliary contacts and alarm - indicating contacts, they're widely used in communication industry's main cabinets, power cabinets, distribution cabinets, and outdoor cabinets.
Our CQB7DC-63 series stands out due to advanced technology and strict quality control. Using cutting - edge equipment and following strict quality standards, we ensure each unit performs reliably. We understand international clients' unique needs and offer flexible customization from product design to packaging. Our efficient processes and quality systems ensure timely delivery of high - quality products, helping clients compete globally.
Overview and applications
The rated operating voltage of CQB7DC-63 series DC miniature circuit breakers can reach DC 1000V, and the rated operating current can reach 63A, which are used for isolation, overload and short circuit protection. It is widely used in photovoltaic, industrial, civil,communication and other systems, and can also be used in DC systems to ensure the reliable operation of DC systems.
Standards: IEC/EN 60947-2, EU ROHS environmental protection requirements.
Technical data
| Specifications | |
| Rated voltage (V) | 1P、2P、3P、4P |
| Rated current(A) | 6A、10A、13A、16A、20A、25A、32A、40A、50A、63A |
| Rated insulation voltage (V) | DC1000 |
| Ultimate breaking capacity (KA) | 6 |
| Operational breaking capacity (KA) | 6 |
| Tripping curves | Type B(4In±20%),Type C(8In±20%) |
| Mechanical life | 10000 |
| Electrical life | 1500 |
| Wiring capacity | ≤25mm² |
| Tightening torque (N·m) | 3.0 |
| Protection class | IP20 |
| Standards | GB/T14048.2 |
| Compliant certification | CCC |
Table1 Tripping characteristics(Reference temp.30℃)
| Item | Tripping Curve | Test current In(A) | Initial Status | Time limit for tripping or non-tripping | Expected result | Remarks |
| a | C | 1.05ln | Cold | t≤1h | Non-tripping | |
| b | C | 1.3ln | Following previous test | t<1h | Tripping | Current smoothly rises to specified value in 5s |
| c | C | 2.55ln | Cold | 1s<t<60s(ln≤32A) 1s<t<120s(In>32A) |
Tripping | |
| d | C | 6.4ln | Cold | t≤0.1s | Tripping | Switch on the power supply by closing the auxiliary switch |
| e | C | 9.6ln | Cold | t<0.1s | Tripping | Switch on the power supply by closing the auxiliary switch |
Note: The term "cold" means that the test is carried out at a reference calibration temperature without load before the test.
Tripping curves
Dimensions(unit:mm)
Order Specifications
1.When ordering circuit breakers, the following points should be specified:
A) Product models, such as CQB7DC-63;
B) Poles of circuit breakers, such as 1P、2P、3P、4P;
C) Types of instantaneous tripping,such astype B/C;
D) Rated current of circuit breakers, such as 16A、20A、25A;
E) Order quantity,such as 100pcs
2.Purchase order template
CQB7DC-63 2P C/16A 100pcs
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