Improved structure of safety protection device of low-voltage distribution cabinet

Abstract

The invention discloses an improved structure of a safety protection device of a low-voltage distribution cabinet. A current transformer, a zero-sequence current transformer and an intelligent residual current operated protector are installed at an upper end of a fuse on a low-voltage outgoing line. The intelligent residual current operated protector is used for acquiring three-phase current values monitored by the current transformer and zero-sequence current values monitored by the zero-sequence current transformer. Contact temperature sensors are installed on conductor surfaces at a lower end of the RTO fuse on the low-voltage outgoing line. Water level sensors are installed in the low-voltage distribution cabinet at setting positions higher than an installation surface. The contact temperature sensors and the water level sensors are communicatively connected with a temperature and water level transmitter. The temperature and water level transmitter is communicatively connected with a wireless low-voltage distribution cabinet data collection terminal. The wireless low-voltage distribution cabinet data collection terminal is communicatively connected with the intelligent residual current operated protector. The improved structure of the safety protection device of the low-voltage distribution cabinet solves the problem that the temperature of cables is inconvenient to measure by using an infrared temperature measuring instrument during daily patrol inspection.

Description

technical field [0001] The invention relates to an improved structure of a safety protection device for a low-voltage power distribution cabinet. Background technique [0002] At present, power supply companies have not considered the temperature monitoring and fault automatic disconnection isolation measures at the connection between the cable and the RTO fuse, and when the equipment is inspected every month, the safety regulations stipulate that direct contact with the cable is not allowed with hands, so the surface of the cable cannot be inspected temperature. If a certain line of a certain group of low-voltage cables is burned due to loose connection or overload and heat, resulting in a short circuit, it will affect the scrapping of this group of cables or the burning of equipment in the entire low-voltage power distribution cabinet. Power outages for users under the low-voltage outlets, most of which are all power outages for several groups of low-voltage outlets in th...

AI Technical Summary

Problems solved by technology

[0002] At present, power supply companies have not considered the temperature monitoring and fault automatic disconnection isolation measures at the connection between the cable and the RTO fuse, and when the equipment is inspected every month, the safety regulations stipulate that direct contact with the cable is not allowed with hands, so it is impossible to check the surface of the cable temperature

If a certain line of a certain group of low-voltage cables is burned due to loose connection or overload and heat, resulting in a short circuit, it will affect the scrapping of this group of cables or the burning of equipment in the entire low-voltage power distribution cabinet. Power outages for users under low-voltage outlets, most of which are power outages for several groups of low-voltage outlets connected to users in the entire low-voltage power distribution cabinet

In addition, whenever there is a heavy rainstorm, the low-lying power distribution room often accumulates water, and it has also happened that the water flooded to the RTO fuse of the low-voltage outlet and burned the entire equipment in the low-voltage power distribution cabinet.

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