Plug-in type resin insulation dry transformer without tapping

A dry-type transformer, plug-in technology, applied in the direction of transformer/inductor coil/winding/connection, etc., can solve the problems of unstable operation of the transformer, complicated connection and installation process, and easy oxidation of the contact interface, so as to reduce electric shock by hand The possibility of simplifying the internal wiring of the coil and the effect of convenient connection and operation

Inactive Publication Date: 2002-03-13
温州市变电设备厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the transformer and the external line, the tap terminal and the tap connection strip or the tap switch are all connected by bolts, and the connection and installation process is complicated; the outgoing terminal is exposed to the air, and the contact interface is easy to oxidize as time goes by , which increases the contact resistance and reduces the effective cross-section of the passing current, which causes the terminal to heat up, which in turn promotes the oxidation to form a vicious circle, and finally makes the transformer run unstable, and even brings serious consequences.

Method used

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  • Plug-in type resin insulation dry transformer without tapping
  • Plug-in type resin insulation dry transformer without tapping
  • Plug-in type resin insulation dry transformer without tapping

Examples

Experimental program
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Embodiment 1

[0015] Such as figure 1 , 2 , 3, and 4, Embodiment 1 of the present invention is a Y-connection non-tap plug-in resin-insulated dry-type transformer, which includes a low-voltage outlet terminal 1, a hook 2, an upper clamp 3, a socket 4, a pad 5, a lower Clip 6, fan 7, insulating cover 8, low voltage coil 9, high voltage coil 10, insulating casting body 11, iron core 12, lead wire 13. In this embodiment, the outlet terminal and tap terminal of each phase of the high-voltage coil of the traditional insulated dry-type transformer are combined into three sockets 4 at the beginning of the coil. Such as image 3 As shown, the socket 4 is composed of a conductive rod 14 and a static contact 15. The conductive rod 14 is provided with a socket inner cavity. The louver is processed into a concave-convex louver shape. The two ends of the louver extend outwards and are inclined to the same side. When the static contact 15 is placed in the inner cavity of the conductive rod 14 socket, ...

Embodiment 2

[0019] Such as Figure 5 , 6 , 7, and 8, Embodiment 2 of the present invention is a D-connection non-tap plug-in resin-insulated dry-type transformer, and the difference from Embodiment 1 is as follows Figure 7 The shown elbow cable plug 17 is also provided with an intermediate plug 16 to form a plug assembly.

[0020] Regardless of the connection group of the transformer, there are at least 2 sockets on the high-voltage coil of each phase of the transformer. The number is determined according to the magnitude of the grid voltage change. Generally, 3 sockets can meet the requirements. For example, if the rated voltage of the grid is 10000V, and there are 3 taps as an example, when the actual voltage of the grid is close to it, the elbow cable plug should be inserted into the middle socket. If the actual voltage of the grid is higher or lower than the rated value for a long time 5%, the elbow cable plug should be inserted into the socket located above or below. After adding...

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Abstract

The present invention relates to transformer, and is especially resin insulated dry transformer with plug-in type outgoing connector without tapping. The transformer features that the designed outgoing terminal for each phase is socket matching with elbowed cable plug and with the two-in-one function of tapping and voltage regulation, and the socket consists of conducting rods and static contactsin the socket cavity. The leads for high voltage winding is fixed and connected to the socket, and the socket, the high voltage winding and the leads are cast inside one identical insulated cast body. The present invention has the advantages of convenient operation, reliable connection, stable running, high insulation performance and less risk of electric shock.

Description

1. Technical field [0001] The invention relates to a resin-insulated dry-type transformer used in combined substations, mines or indoors, especially an electrical connection device for its outlet terminals. 2. Background technology [0002] The traditional non-excitation voltage regulating resin insulated dry-type transformer includes iron core, high and low voltage coils, upper and lower clamps. Since the actual voltage of the power grid is often different from the rated voltage, in order to adapt to the high or low voltage of the power grid and make the transformer output a voltage within the allowable variation range of the load, it is usually to connect the outlet terminals of the high and low voltage coils with the external line Cables or copper bars are connected by bolts, and tap terminals are also provided in the middle or end of low-voltage coils for high-voltage coils and special needs. Tap-connecting strips or appropriate off-excitation voltage regulating tap-chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/29
Inventor 沈玉山张林兴
Owner 温州市变电设备厂
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