Device for monitoring working state of fuse
A technology of working status and monitoring devices, which is applied in the direction of measuring devices, emergency protection devices for automatic disconnection, circuit devices, etc., can solve problems such as the adverse effects of restoring normal power supply, potential safety hazards of power supply lines, and damage to electrical facilities, etc. The inspection and elimination process is convenient, the safety protection factor is improved, and the effect of protecting electrical equipment
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[0016] The fuse monitoring module of the present invention, according to the above design ideas, in terms of specific implementation, the monitoring signal of the three-phase fuse can be connected to the monitoring device of the fuse through the connecting plug-in, and the voltage signal at both ends of the fuse is passed through the resistor After the current is limited, it is connected to both ends of the light-emitting diode to indicate the working state of the fuse. The working voltage of the circuit board is taken from the fuse receiving end of the fuse monitoring signal, and is used as whether the three-phase power supply is missing and whether the fuse is blown. The signal of the three-phase AC power is sent to the voltage stabilizing circuit unit composed of resistors, Zener diodes and capacitors through diode rectification and capacitor filtering, and the output stabilized DC power supply is supplied to each functional unit. At the same time, the power indicator light-...
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