Residual current detector and fire alarm system
A residual current and detector technology, applied in the field of residual current detectors and fire alarm systems, can solve the problems of inconvenient installation and use, easy electric shock, easy reverse connection of positive and negative poles, etc., and achieves simple and safe use and improved convenience. Effect
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[0021] See figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, a residual current detector includes a CPU unit, the CPU unit is electronically connected to the bus receiving and returning code circuit, and the residual current detection circuit, the bus receiving and returning code circuit is electrically controlled to connect to the non-polarity two-bus input module, and the CPU unit , bus receiving code return code circuit, residual current detection circuit, non-polarity two bus input modules are electrically connected to the bus power supply circuit, and the CPU unit is also electrically connected to the fault detection circuit, fault alarm circuit, over-limit alarm circuit, fault detection circuit, Both the fault alarm circuit and the overrun alarm circuit are electrically controlled and connected to the bus power supply circuit, and play the role of fault detection and alarm.
[0022] The CPU unit includes a single-chip microcomputer U2, specifically a ...
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