Low-voltage distribution subcircuit identifying device

Abstract

The invention relates to a low-voltage distribution subcircuit identifying device which is characterized by comprising a switch triode (T), wherein the base electrode of the switch triode (T) is connected with a second resistor (R2) in series and then is connected with a first testing end (T1), a second testing end (T2) is directly connected with the positive electrode of a direct-current power supply, the emitting electrode of the switch triode (T) is directly connected with the positive electrode of the direct-current power supply, and the collector electrode of the switch triode (T) is connected with the negative electrode of the direct-current power supply through a fourth resistor (R4) and a battery main switch (K) which are connected with the switch triode (T) in series. The device further comprises a fifth resistor (R5) and a red light emitting diode (Dr), wherein the fifth resistor (R5) and the red light emitting diode (Dr) are connected in series and then connected with the fourth resistor (R4) in parallel. The low-voltage distribution subcircuit identifying device can be connected to the two ends of a load in parallel to judge whether the electric equipment passes through an electric energy meter according to light indications of the device.

Description

technical field [0001] The invention relates to a low-voltage power distribution branch identification device. Background technique [0002] During the electricity inspection of 220V low-voltage equipment, it was found that the use of contactors to steal electricity was found, specifically: the coil of the contactor passed through the electric energy meter, and its contacts bypassed the electric energy metering device; The coil loses excitation, and the contactor contact disconnects the load; through long-term follow-up observation, the load size does not match the monthly power consumption. Since the user wire is installed as a concealed wire and the room has been decorated, it is difficult to judge and check, and it is impossible to collect evidence. Bring great difficulties, resulting in power loss. Contents of the invention [0003] The purpose of the present invention is to provide a low-voltage power distribution branch identification device, which can determine whe...

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Problems solved by technology

[0002] During the electricity inspection of 220V low-voltage equipment, it was found that the use of contactors to steal electricity was found, specifically: the coil of the contactor passed through the electric energy meter, and its contacts bypassed the electric energy metering device; The coil loses excitation, and the contactor contact disconnects the load; through long-term follow-up observation, the load size does not match the monthly power consumption. Since the user wire is installed as a concealed wire and the room has been decorated, it is difficult to judge and check, and it is impossible to collect evidence. Bring great difficulty, cause power loss

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