FAQ

CHYT Miniature Circuit Breaker (MCB) is primarily utilized for circuits with low current, whereas the Molded Case Circuit Breaker (MCCB) is employed for circuits with heavy current. MCBs are commonly found in domestic settings with low energy requirements, whereas MCCBs are typically used in high energy consumption environments such as large industries.

CHYT RCBO is a circuit breaker that provides leakage protection. The relevant standards that RCBO must adhere to are the international standard IEC 61009-1:2012 and the national standard GB 16917.1-2003.

Residual Current Device (RCD) is designed to switch off the main circuit when a certain level of residual current is detected under normal operating conditions. It incorporates various elements that detect residual current and act as a trigger to turn on/off the main circuit. This device helps ensure the safety of electrical installations by preventing electric shock caused by ground faults or other electrical faults.

Residual current refers to the vector sum of current in each phase, including the neutral line, in a low-voltage distribution line that is not zero. Generally, in the event of an accident on the power supply side, the current flows from the charged body to the ground through the human body, causing the magnitude of the current in phase I and phase II in the incoming and outgoing lines of the main circuit to be unequal. At this time, the instantaneous vector composite effective value of the current is called residual current, commonly known as leakage current.

RCD stands for Residual Current Device, while RCCB stands for Residual Current Breaker. An RCCB is an electrical wiring device that immediately shuts off the circuit upon detecting a current leakage to the earth wire