Full state monitoring with power-off protection alarm circuit
A technology of power-off protection and alarm circuit, which is applied in the direction of emergency protection circuit device, protection that responds to overcurrent, emergency protection device that automatically disconnects, etc., and can solve the problem of single protection function, low protection accuracy, power-off protection and other problems, to achieve the effect of adjustable protection threshold and high protection precision
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[0016] refer to figure 1 . In the preferred embodiment described below, a full-state monitoring band power-off protection alarm circuit includes: a state monitoring unit 31 and a power supply that are electrically connected to the monitored load 1 through a no-load switch 9, and an acousto-optic device containing a solid-state relay 27 The prompt alarm unit 32 is characterized in that the solid state relay 27 connected to the state monitoring unit 31 is connected to the sound and light rotary prompter 28 through the built-in switch output end, and the AC switch 29 is connected in series through the AC access line 30. The solid state relay 27 has a built-in switch input end The AC circuit that constitutes the sound and light prompt alarm unit 32; under the normal operation of the monitored load 1, the positive power supply A1 of the monitored load supplies power to the monitored load 1 through the power-off control relay 16 normally on group switch, and the current monitor 2 to...
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