2P 1P+N Residual Circuit Breaker with Overcurrent Protection

Principle of operation

The operating principle of the 2P 1P+N Residual Circuit Breaker with Overcurrent Protection is based on the vector sum of currents and the electromagnetic principle. When the currents on the L (Fire) and N (Zero) lines in the circuit are not equal in magnitude, the vector sum of currents in the primary side of the transformer circuit is not zero, which generates an induced voltage in the secondary side coil. This induced voltage is added to the electromagnetic relay, generating an excitation current that creates a reverse demagnetizing force. When the fault current reaches the operating current value of the RCBO, this reverse demagnetizing force will cause the armature inside the electromagnetic relay to disengage from the yoke, pushing the operating mechanism to act and cut off the fault current circuit.

Features & Benefits

Multi-functional protection: 2P RCBO combines residual current protection and overcurrent protection functions, which can fully protect the safety of circuits and equipment.

High Reliability: Adopting advanced electronic components and disconnecting mechanism, it has high reliability and safety.

Flexible Configuration: 2-pole design allows simultaneous protection of 1-phase power and zero line, suitable for various complex electrical systems.

Easy to install and maintain: reasonable structural design, easy to install, and at the same time easy to carry out maintenance and overhaul.

Selection and Installation

Selection: When selecting the type, it should be based on the rated voltage, rated current, short-circuit breaking capacity and leakage action current of the circuit and other parameters. At the same time, the number of poles and the number of current circuits of RCBO should also be considered to meet the protection needs of the circuit.

Installation: 2P RCBO should be installed in a dry, ventilated place with no corrosive gas and no danger of explosion. Installation should ensure that the wiring is correct and reliable, the operating mechanism is flexible and reliable, and the installation follows relevant standards and codes.