Multiloop function unit for low-pressure drawer type switch cabinet

Abstract

The invention relates to the technical field of low-pressure drawer type switch equipment, in particular to a multiloop function unit for a low-pressure drawer type switch cabinet, which carries out the drawer operation by an unlocking button and comprises a lock plate, a display plate, an interlock base and a three-position locating plate, wherein one side of the three-position locating plate is provided with a location guide surface, and the other side is provided with a display guide surface, a test position locating slot and a connecting position locating slot are arranged on the location guide surface, the step transition is adopted for the display guide surface which is provided with a test position display step and a connecting position display step, and the display guide surface is contacted with the location guide surface through a lock rod. When a drawer reaches an appointed position, the test position locating slot and the connecting position locating slot are embedded to realize the locking of the drawer; meanwhile, a drive rod is contacted with the display guide surface, the display plate is enabled to swing through the drive of the display guide surface, and a state display window displays the current position. The invention has more compact structure, and enables the installation space in the drawer to be further increased.

Description

Technical field [0001] The invention relates to the technical field of low-voltage withdrawable switchgear, in particular to a multi-circuit functional unit for low-voltage withdrawable switch cabinets. It is suitable for one input and multiple output of main and auxiliary power supplies of multiple circuits in a cabinet, and realizes the functional application of a cabinet from 18 circuits, 24 circuits to 40 circuits. Background technique [0002] Low-voltage withdrawable switchgear equipment has become the main equipment used at home and abroad. Domestic equipment GCK, MNS economical, and GCS economical all have 1 / 2 drawer function, foreign brands ABB, MNS2.0, MNS3.0, Schneider OKKEN The cabinets have 1 / 2 and 1 / 4 drawer technical functions. [0003] The technical functions are composed of a power distributor, a drawer structure, and a push interlocking mechanism, with different modulus coordination. OKKEN cabinet can meet 150 modules, that is, 12 layers of 1 / 2 drawers can be in...

AI Technical Summary

Problems solved by technology

[0005] At present, the depth of the power distributor in the 1 / 2 functional unit used in the domestic GCK cabinet is 85mm, which meets the 200 modulus. A cabinet can be installed with 9 drawers. The depth of the unit room occupied by the power distributor is too large, which affects the reliability of the device. The installation space, such as the deepening of the unit room, increases the manufacturing cost, and the push interlock mechanism basically adopts the small interlock in ABB2.0, mechanical two positions, electrical three positions, or adopts the small interlock in GCS, mechanical two positions, electrical Three-position, and some self-made simple hand-push mechanisms, only connection lock, no mechanical three-position, no electrical three-position, only for power distribution function, not for control circuit function

The above-mentioned interlocking mechanisms cannot meet the application of 150-module drawer units, and the main circuit inlet terminal of the drawer in the test position is in the energized state, which is relatively poor in safety (only when the interlocking lock is unreliable)

[0006] The current level of MNS2.0 and MNS3.0 is only 50A, and the current is too small to fully meet the current of 1 / 2 functional unit. GCS also only has 50A

[0007] The power distributors designed and applied in China have a current of 63A and 100A, but the depth of the occupied unit room is too large, and it cannot meet the requirements of the electrical connection standard for side outlets. 1 / 2 drawer techniques all have different drawbacks

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