China factory design RCCB circuit breaker with good PCB board assembly
A basic overview: leakage protection can their protection, structural features, installation, operation mode, the number of poles and lines, motion sensitivity classification, where the main function and purpose of their protection classification is described, and can be divided into leakage protection relays, earth leakage protection and leakage protection switch socket three.
1. leakage protection relay refers to a leakage current detection and judgment functions without having leakage protection device off and on the main circuit functions. Leakage protection relay by a zero sequence transformer, auxiliary contacts and releases the output signal components. It can be used with automatic switch with high current, low-voltage power grid as the total leakage protection or trunk road, the ground or the insulation monitoring protection. When the main circuit leakage current, since the auxiliary contacts and the separation of the main circuit switch release series into a loop, so the auxiliary contact is turned off and isolated trip air switch, exchanges and contacts, etc., to make it out of the gate, cut off the main circuit. Auxiliary contacts can also be turned on sound, light signal means emit an alarm signal leakage, reflecting the insulation condition of the line.
2. leakage protection switch refers to it only as in the other main circuit breaker can be switched on or off, but also leakage current detection and judgment function, when the main circuit in the event of leakage or dielectric breakdown, leakage protection switch according to Analyzing the results of the main circuit switching element is turned on or off. It fuses, thermal relay function can be constructed with the perfect low-voltage switching elements. It can be customized according to customer requirements.
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