Indoor direct current fast grounding switch

Abstract

The invention discloses an indoor direct current fast grounding switch. The switch includes a shell, and a connecting terminal, an electrical control, a signal output, an operating mechanism, a manualoperation, an electric operation module and stationary-moving contacts which are arranged in the shell; the inner cavity of the shell is divided into front and rear cavities through a vertical plate;the stationary-moving contacts are installed in the rear cavity and divided into four copper bars which are in symmetric arrangement through a manner of upper and lower rows and extend to the rear wall of the shell; one of the two upper copper bars is connected to the negative electrode of a direct current power supply system, and the other one is grounded with PE; mechanical connection is arranged between the two lower copper bars to perform common action and are electrically connected to each other through inter-phase short circuit copper bars; in the front cavity, a connecting terminal module is installed on the top, electrical control and signal output modules are parallelly distributed at the middle part, and operating mechanism, manual operation and electric operation modules are distributed at the lower part; the operating mechanism module, except for controlling the two moving contacts, is also connected to the manual operation, electric operation, signal output and electricalcontrol modules; and the electric operation module is also connected to the connecting terminal module. The switch is enclosed, compact in structure, small in volume and reliable in performance.

Description

technical field [0001] The invention relates to a switch, in particular to an indoor DC fast grounding switch. Background technique [0002] Existing grounding switches generally include a housing, a wiring terminal module, an electrical control module, a signal output module, an operating mechanism module, a manual operation module, an electric operation module and static and dynamic contacts. [0003] At present, most of the grounding switches in China are similar to the grounding switches in the high-voltage switchgear, with a large volume and an open structure. Italy COSTRUZIONI ELETTROTECNICHE S.R.L. referred to as COET company has a complete set of DC cabinet solutions, its MAT grounding switch closing time <80ms, mechanical life of 20,000 times, short-time withstand current up to 100kA, rated working voltage DC 3000V, higher than domestic DC System voltage DC1500V. But at the same time, its products are larger in size and higher in cost, which cannot meet the nee...

AI Technical Summary

Problems solved by technology

But at the same time, its products are larger in size and higher in cost, which cannot meet the needs of domestic miniaturized cabinets and economical product prices.

Images