Junction box special for 35kV and over 35kV metering device

Abstract

The invention relates to a junction box special for a 35kV and over 35kV metering device. The junction box comprises a box body and a box cover. The junction box further comprises a detachable insulating hole plug. Current junction blocks and voltage junction blocks are arranged in the box body. Current junction holes are formed in the current junction blocks. A plurality of voltage junction holes are formed in the voltage junction blocks. The detachable insulating hole plug is additionally arranged in at least one voltage junction hole. Compared with the prior art, the junction box has the advantages of being convenient to install, attractive in appearance, reasonable in structure and the like.

Description

technical field [0001] The invention relates to a junction box, in particular to a special junction box for 35kV and above metering devices. Background technique [0002] The current commonly used junction box for electric energy measurement (also known as a combined junction box) has a structure including a box body and a lid, and the box body is provided with voltage terminals, current terminals and connecting slides. The on-site inspection of the electric energy meter of large users is one of the important on-site tests of the metering center. When the wiring is calibrated on site, the current wire of the calibrator is easily connected to the voltage outlet hole of the joint junction box, causing a safety accident. [0003] The voltage area of ​​the joint junction box adopts the design of "one inlet hole and three outlet holes". At present, because the voltage loss timer is no longer installed, the metering device is generally equipped with "electric energy meter + negati...

AI Technical Summary

Problems solved by technology

The on-site inspection of the electric energy meter of large users is one of the important on-site tests of the metering center. When the wiring is calibrated on site, the current wire of the calibrator is easily connected to the voltage outlet hole of the joint junction box, causing a safety accident

[0003] The voltage area of ​​the joint junction box adopts the design of "one inlet hole and three outlet holes". At present, because the voltage loss timer is no longer installed, the metering device is generally equipped with "electric energy meter + negative control terminal" or "electric energy meter + special transformer terminal". ", so only one or two voltage lines need to be drawn out for each phase at the joint junction box, which will inevitably result in one or two spare outlet holes in the joint junction box

When inspecting the working wiring of the electric energy meter, since the spare voltage outlet hole is next to the current wiring hole of the adjacent phase calibrator, if the site environment is dark, it is easy to cause the current wiring pile head of the calibrator to be connected to the spare voltage outlet hole lead to safety accidents

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