What is the Difference Between RCCB and RCD in Residual Current Breaker?
RCCB (Residual Current Circuit Breaker)
● Definition: RCCB is short for residual current operated circuit breaker, which includes a short-circuit protection function, similar to an MCB (Miniature Circuit Breaker).
● Function: RCCB primarily monitors the residual current (i.e., leakage current) in the circuit. When the current exceeds the preset value, the circuit breaker swiftly disconnects the circuit to prevent electric shock accidents and fires. Additionally, RCCB provides short-circuit protection.
Features:
The inclusion of short-circuit protection makes RCCB more comprehensive in circuit protection.
It must comply with international standard IEC 61008-1 and national standard GB16916.1.
● Application Scenario: RCCB is suitable for locations with high electrical safety requirements, such as homes, commercial buildings, and industrial facilities.
RCD (Residual Current Device)
● Definition: RCD stands for residual current device, which is a general term for all leakage protection devices.
● Function: RCD detects residual current in the circuit. Upon detecting current exceeding the preset value, the device operates to disconnect the circuit, preventing electric shock accidents. However, RCD itself does not offer short-circuit protection.
Features:
Its primary function is to provide leakage protection, akin to a leakage switch.
It must comply with international standard IEC 61009.1 and national standard GB 18499.
● Application Scenario: RCD is widely used in places requiring leakage protection, such as residences, schools, and hospitals.
Summary
● Function Difference: RCCB, in addition to providing leakage protection like RCD, also offers short-circuit protection. RCD solely provides leakage protection.
● Feature Difference: Both RCCB and RCD adhere to corresponding international and national standards, albeit with different standard numbers.
● Application Scenario: Both devices are extensively used in electrical safety applications. The choice between RCCB and RCD depends on specific needs and requirements.
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