CN2526958Y

CN2526958Y - Non-excitation tap changer

Info

Publication number: CN2526958Y
Application number: CN 01252030
Authority: CN
Inventors: 秦伟
Original assignee: Fang Yuzhou
Current assignee: Fang Yuzhou
Priority date: 2001-09-30
Filing date: 2001-09-30
Publication date: 2002-12-18
Anticipated expiration: 2011-09-30

Abstract

The utility model relates to an off-circuit tap-changer which is used in a transformer, which comprises a location device 1, an upper flange 2, a main shaft 3, a disk-shaped switch base 4, a fastening pole 5, a lower flange 6, a dynamic contact 7 and a static contact 8, etc. The utility model has good operation handle feeling and high reliability.

Description

Off circuit tap changer

The utility model relates to a kind of transformer off circuit tap changer, is the improvement to existing shunting switch.

Existing no excitation dish type middle part voltage-regulation tap changer as shown in Figure 1, 2.The main structure contact is distributed on the dish type, and its contact is the clip type structure, and moving contact is a sliding friction in when motion and fixed contact, wearing and tearing are big, especially do not have operating handle, are prone to operate not in place and initiating failure, and three-phase makes the switch external diameter big on same plane, and the phase insulation level is also not high.

The purpose of this utility model is to avoid above-mentioned weak point and a kind of novel dish type off circuit tap changer is provided.

The purpose of this utility model is realized by following scheme, includes compositions such as operation positioner 1, upper flange 2, main shaft 3, dish type switch base 4, fixed lever 5, lower flange 6, moving contact 7, fixed contact 8.It is characterized in that fixed contact 8 along circumferentially being installed on the dish type switch base 4, moving contact 7 cross-over connections are in 8 of two adjacent fixed contacts, and moving contact 7 is a column structure, and setting-in is gone in the supporter 9, and dynamic and static contact engages under spring 10,11 cushion block effects.

Press such scheme, its fixed contact 8 also can constitute excitation-free cage type tapping switch along circumferentially being distributed on the fixed lever 5; Heterogeneous also can being arranged on the switch base, main shaft correspondence are disposed a plurality of supporters 9 and moving contact 7 in a plane.

When the utility model is disk-shaped structure, each switch base is a phase, three-phase has three switch bases, the switch diameter is little and length dimension is big like this, it is little to take planar dimension, is suitable for some specific occasions, uses as combined transformer, this moment, but three-phase circumferential position interlaced arrangement was to improve the rigidity of main shaft, three alternate mutually insulateds.Three-phase also can be on same switch base 4 floor plan, diameter is big and height dimension is little like this, is suitable for the case top and installs.

When the utility model was cage structure, each fixed contact was along circumferentially being distributed on the different insulative bar, and insulation level is higher between its contact.

In the such scheme, when actuating switch spindle 3, main shaft drives moving contacts 7 rotations by supporter 9, and moving contact rotates at spring 10 thrust lower edge fixed contacts 8, just be included on another bridge position automatically after crossing the dead point, thereby operating handle is strong, the reliability height.

Now narrate two embodiment of the present utility model in conjunction with the accompanying drawings.

Fig. 1 is an existing no excitation dish type middle part voltage-regulation tap changer front view.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is the front view of an embodiment of the present utility model.

Fig. 4 is the B-B view of Fig. 3.

Fig. 5 is the front view of another embodiment of the utility model.

An embodiment of the present utility model is shown in Fig. 3,4, for three-phase does not have excitation dish type middle part voltage-regulation tap changer, has operation positioner 1, its top connection upper flange 2, flange 2 is connection insulation fixed lever 5 circumferentially, is fixed with three layers of dish type switch base 4 (formation three-phase) and lower flange 6 by fixed lever 5,2,6 of last lower flanges are coated with rotating shaft 3, each corresponding supporter 9 that is provided with of axle upper edge is embedded with moving contact 7 on the supporter, 9 of moving contact 7 and supporters have spring 10 and cushion block 11.

For improving main shaft and switch rigidity, the centre makes stressed good on the contrary to layout.

Each can adopt the mode of many group contacts parallel connection mutually for the big switch of electric current, and is more or few for the number of phases, and the quantity that changes switch base 4 is got final product every alternate mutually insulated.

When needing the switch height dimension low, between operation positioner and Switch main body, can set up the bevel gear structure, make it to become horizontal switch for the installation of case top, height dimension is reduced, and diameter dimension is little, makes full use of the transformer body upper space, in the following example shown in.

Fig. 5 does not have excitation dish type middle part tap changer for another three-phase, and three-phase is distributed on the same switch base, also corresponding configuration in same plane of moving contact with fixed contact, and the switch height dimension is little, and radial dimension is big.

Above moving contact is connected across between two fixed contacts, can realize multiple connection principle with the difference of lead-in wire connecting mode between fixed contact and on the coil, as linearity transfer, single spanning connects, doube bridge cross-over connection, the conversion of Y-Δ, connection in series-parallel, positive and negative accent etc.

Claims

1, a kind of transformer off circuit tap changer, have compositions such as operation positioner 1, upper flange 2, main shaft 3, dish type switch base 4, fixed lever 5, lower flange 6, moving contact 7, fixed contact 8, it is characterized in that fixed contact 8 is along circumferentially being installed on the dish type switch base 4, moving contact 7 cross-over connections are in 8 of two adjacent fixed contacts, moving contact 7 is a column structure, setting-in is gone in the supporter 9, and dynamic and static contact engages under spring 10,11 cushion block effects.

2,, it is characterized in that fixed contact 8 also can constitute excitation-free cage type tapping switch along circumferentially being distributed on the fixed lever 5 by the described transformer off circuit tap changer of claim 1.

3, by the described transformer off circuit tap changer of claim 1, it is characterized in that heterogeneous also can being arranged on the switch base, the main shaft correspondence disposes a plurality of supporters 9 and moving contact 7 in a plane.