Integrated plug-pull combined type vacuum on-load tap changer

Abstract

The invention discloses an integrated plug-pull combined type vacuum on-load tap changer, which comprises a changer oil chamber and a changer body inserted in the changer oil chamber. The changer oil chamber comprises an insulating cylinder and a tap changer installation flange fixed at the head of the insulating cylinder, a support flange, and a cylinder bottom for installing the bottom of the insulating cylinder. Stationary contact terminals are installed on the cylinder wall of the insulating cylinder. The changer body comprises a support cage body provided with stationary contacts, a quick mechanism arranged at the head of the support cage body, an insulating spindle connected with the quick mechanism and vacuum switch components. The stationary contacts and float contacts electrically connected with the stationary contacts are arranged on cage plate strips of the support cage body, the float contacts are electrically contacted with the corresponding terminals, and movable contacts of the vacuum switch components are in contact with the stationary contacts in switching. The integrated plug-pull combined type vacuum on-load tap changer has the advantages that the tap changer is convenient to debug and install; and when the tap changer is maintained, a transformer cover is not required to be opened, transformer connection lines are not required to be dismounted, and only the changer body is lifted out.

Description

technical field [0001] The invention relates to a composite vacuum on-load tap changer, in particular to an integral plug-in composite vacuum on-load tap changer. Background technique [0002] The existing compound on-load tap-changer is an on-load tap-changer that combines the functions of switching and selection into one. The on-load tap-changer is mounted on the transformer cover by means of the switch head flange. This type of composite on-load tap changer usually installs the static contacts on the wall of the insulating cylinder, and the switching transition contacts, main on-off contacts, moving contacts and transition resistors are installed on the insulating shaft. , and then hoist the assembled center shaft assembly into the insulating cylinder. This structure has two disadvantages: 1. If there is damage in the switch, such as contact burnout, damage to the soft connection between the outgoing contact and the moving contact, etc., the tap changer including the in...

AI Technical Summary

Problems solved by technology

This structure has two disadvantages: 1. If there is damage in the switch, such as contact burnout, damage to the soft connection between the outgoing contact and the moving contact, etc., the tap changer including the insulating cylinder and the center shaft assembly must be removed from the switch. The transformer can only be repaired when it is taken out of the transformer. In this way, the transformer must be uncapped, oil drained, and disconnected, which is labor-intensive and time-consuming, and affects the normal use of the transformer.

2. The maintenance and debugging during the production process of the tap changer must be carried out after the entire tap changer is assembled, and the core must be suspended during debugging, which is very troublesome

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