4P 63A /30mA RCD AC Type

basic concept

 4P: Indicates that this 4P 63A /30mA RCD AC Type is a four-pole switch, i.e. it can control the on-off of four circuits simultaneously. This design is usually used in applications where the phase, zero and two ground wires need to be cut off at the same time to ensure that in the event of a leakage or fault, the circuit can be completely cut off to provide a higher level of electrical safety protection.

 63A: Indicates that the RCD is rated at 63 amps, which is the maximum current value that the RCD can carry continuously without causing overheating or damage.

 30mA: Indicates that the RCD has a leakage action current of 30 milliamps, i.e., when the leakage current in the electrical system exceeds this value, the RCD will quickly cut off the power supply to protect personal safety and prevent accidents such as electrical fires.

 RCD: Residual Current Device, an electrical safety device used to detect residual current (i.e. leakage current) in an electrical system and cut off the power supply.

 A Type: It means that the RCD is A type, i.e. it can act correctly on both AC and pulsating DC residual currents (a smooth DC current of ≤6mA can be allowed to be superimposed). This type of RCD is suitable for circuits with many electronic devices, such as household appliances, office appliances, computers and other places.

Principle of operation

The operating principle of the RCD is based on the residual current transformer. When an unbalanced current (i.e. leakage) occurs in an electrical system, the residual current transformer detects this unbalanced current and generates a magnetic flux proportional to the leakage current. This magnetic flux triggers the RCD's internal disconnecting mechanism, causing the RCD to quickly cut off the power supply, thus protecting the safety of electrical equipment and personnel.

Application Scenario

Industrial power: In industrial environments, due to the presence of a large number of electrical equipment and complex circuit systems, it is necessary to use 4P 63A /30mA RCD A Type to provide comprehensive electrical safety protection.

Commercial: In commercial premises such as shopping malls, hotels, etc., where there is a high concentration of people and electrical equipment, this type of RCD is also required to ensure electrical safety.

High-end Residential: In some high-end residences, 4P 63A /30mA RCD A Type is also chosen to provide a higher level of electrical safety protection.