450 mm-wide small switch cabinet

Abstract

The invention discloses a 450 mm-wide small switch cabinet and relates to a switch cabinet. According to the 450 mm-wide small switch cabinet, an insulation plate and a support plate are fixed on a shell, the switch cabinet is divided into three chambers, namely a bus chamber, a circuit breaker chamber and a cable chamber from top to bottom in sequence, by the insulation plate and the support plate, a disconnecting switch and a wall bushing are installed in the bus chamber, a vacuum circuit breaker and an operation mechanism are located in the circuit breaker chamber and installed on the support plate, a current transformer penetrates through the support plate, an earthing switch and an overvoltage protector are installed in the cable chamber, a primary loop of the vacuum circuit breaker is connected with the disconnecting switch and the current transformer through copper bars, one end of an operation connecting lever of the operation mechanism is connected with a transmission connecting lever of the disconnecting switch through a connecting rod, and the other end of the operation connecting lever of the operation mechanism is connected with a transmission connecting lever of the earthing switch. According to the 450 mm-wide small switch cabinet, the size of the switch cabinet is reduced greatly, the primary conductive loop is shortened greatly, the resistance of a major loop is reduced, the occupied area is reduced, cost is saved, and requirements for miniaturization of power distribution equipment are met.

Description

technical field [0001] The invention relates to a switch cabinet, in particular to a miniaturized switch cabinet with a width of 450 mm. Background technique [0002] Existing switchgear has problems such as bulky, complex structure, low protection level, complex and unreliable operation interlocking, etc. For example, the existing KYN28 mid-mounted switchgear has a large cabinet width, and the primary contact connected to the circuit breaker There are problems such as unreliable connection, easy damage, and high temperature rise, which seriously affect the reliability and safety of the power distribution system and the miniaturization requirements of power distribution equipment. Such as: patent announcement number: 203536842U discloses a kind of miniaturized structure of KYN28 central switchgear, although above problem has been optimized, but still can't solve the problem. Another example: patent announcement number: 102916352A discloses a miniaturized fixed switchgear. ...

AI Technical Summary

Problems solved by technology

[0002] The existing switchgear has problems such as bulky, complex structure, low protection level, complex and unreliable operation interlocking, etc. For example, the existing KYN28 mid-mounted switchgear has a large cabinet width, and the primary contact connected to the circuit breaker There are problems such as unreliable connection, easy damage, and high temperature rise, which seriously affect the reliability and safety of the power distribution system and the requirements for miniaturization of power distribution equipment

Such as: patent announcement number: 203536842U discloses a miniaturized structure of KYN28 central switchgear, although the above problems have been optimized, but still can not solve the problem

Another example: patent announcement number: 102916352A discloses a miniaturized fixed switchgear. Although the structure has been newly arranged and adjusted, the insulating parts and lightning arresters of the isolating switch are installed on the side of the cabinet, occupying a large space. Moreover, the vacuum circuit breaker used has a large operating mechanism and incomplete interlocking, which still fails to effectively control the width of the cabinet, especially failing to meet the requirement of a cabinet width of 450mm

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