| Customization: | Available |
|---|---|
| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Electric Type |
|
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Residual Current Breaker with Over-Current protection (RCBO) is a safety device used in electrical systems that combines the functions of a Residual Current Device (RCD) and a Mini Circuit Breaker (MCB). An RCBO is designed to protect both people and equipment by detecting residual currents (leakage currents) and over-currents (overloads and short circuits). It is commonly used in residential, commercial, and industrial applications to enhance the safety and reliability of electrical installations.
Residual Current Protection
An RCBO constantly monitors the current flowing through the live (hot) and neutral wires of a circuit. Under normal conditions, the current flowing in both wires should be equal. However, if there is a leakage current (e.g., due to a faulty appliance or current flowing to the ground through a person), the RCBO detects the imbalance and trips, disconnecting the circuit to prevent electric shock.
Over-Current Protection
Similar to an MCB, an RCBO also offers protection against overloads and short circuits. Overloads occur when too much current flows through a circuit, usually due to too many devices being connected or a malfunctioning device. Short circuits happen when the live and neutral wires come into direct contact, resulting in an extremely high current flow. In both cases, the RCBO will trip and disconnect the circuit to prevent damage to electrical equipment, wiring, and reduce the risk of fire.
Combined Protection
By integrating both residual current and over-current protection in a single device, an RCBO provides comprehensive protection for electrical circuits, enhancing safety and reducing the need for separate RCDs and MCBs.
Easy Reset
Once the cause of the trip has been identified and resolved, the RCBO can be easily reset, restoring power to the circuit.
Product Benefits :
Technical Data
Technical Data
| Mode | Electronic / Electromagnetic |
| Type | A / AC / |
| Tripping curve | B C D |
| Pole No. | 1P +N |
| Rated voltage | 230/400V~ |
| Rated frequency | 50/60Hz |
| Rated current | 6-40A |
| Rated residual operating current(IΔn) | 30.100.300mA |
| Residual operating current range | 0.5 IΔn~IΔn |
| Rated conditional short-circuit current(lnc) | 6000A |
| Energy limiting | class 3 |
| Electrical and Mechanical life | 20000 |
| Overload Current Protection Characteristics | ||||||
| Test Procedure | Type | Test Current | Initial State | Tripping or Non-tripping Time Limit | Expected Result | Remark |
| A | B.C.D | 1.13In | Cold | t≤1h | no tripping | |
|
B |
B.C.D |
1.45In |
After test A |
t≤1h |
tripping |
The current steadily rises to the specified
value within 5s |
| C | B.C.D | 2.55In | Cold | 1s<t<60s | tripping | |
|
D |
B | 3In |
Cold |
t≤0.1s |
no tripping |
Turn on the auxiliary switch to close the
current |
| C | 5In | |||||
| D | 10In | |||||
|
E |
B | 5In |
Cold |
t≤0.1s |
tripping |
Turn on the auxiliary switch to close the
current |
| C | 10In | |||||
| D | 20In | |||||
| Residual Current Operating Breaking Time | |||||||
| Type | In/A | IΔn/A | Residual Current(IΔ)Is Corresponding To The Following Breaking Time(S) | ||||
| AC type | Any value | Any value | In | 2In | 5In | 5A.10A.20A.50A.100A.200A.500A | |
| A type | >0.01 | 1.4In | 2.8In | 7In | |||
| 0.3 | 0.15 | 0.04 | 0.04 | Max breaking time | |||
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