Multi-gear vacuum on-load tap switch

Abstract

The invention relates to a multi-gear vacuum on-load tap switch. The multi-gear vacuum on-load tap switch consists of two portions, i.e. a toggle switch and a selector switch, wherein the selector switch comprises a moving mechanism of a movable contact module consisting of a stepper motor, a lead screw and a lead screw pair and a gear selection mechanism consisting of a movable contact and multiple groups of static contacts; the static contacts of the selector switch are divided into an odd number group and an even number group, the static contacts of the odd number group contact a D movable contact, and the static contacts of the even number contact an S group of movable contacts; and the toggle switch comprises a permanent magnetic mechanism and a switching module, the access or a main circuit or the access of an auxiliary circuit is rapidly changed by virtue of an electromagnetic coil arranged on the switching module, the switching module is provided with two groups of vacuum pipes, the main circuit is provided with a main vacuum pipe, and the auxiliary circuit consists of the main vacuum pipe and a transition resistor which are connected in series. The multi-gear vacuum on-load tap switch is high in automation degree, simple in structure, and convenient to install and repair. The number of gears is not limited, and the size is smaller relative to a volume drum-type tap switch.

Description

technical field [0001] The invention relates to a multi-gear vacuum on-load tap changer, in particular to a multi-gear vacuum arc-extinguishing on-load tap switch which can be quickly shifted and is used by a power supply department. Background technique [0002] Most of the shift switches of current on-load multi-gear transformers adopt a disc-column structure, such as the patent No. 201610358806.7 "vacuum tap changer", which drives multiple sets of moving contacts to rotate synchronously by rotating the main shaft, and contacts with different static contacts respectively. , to achieve shifting operation under load conditions. On the basis of the on-load tap changer, a vacuum tube and a lever mechanism are added, and multiple rollers are installed inside the insulating cylinder. The front end of the lever is provided with a trapezoidal block, and the trapezoidal block cooperates with the roller when the main shaft rotates . The opening and closing of the vacuum tube is co...

AI Technical Summary

Problems solved by technology

[0003] However, the moving contact of this type of vacuum tap changer is realized by the rotation of the main shaft, and the gear settings are distributed on a circular surface. The maximum number of gears is set at the factory and cannot be replaced flexibly.

Moreover, it is more laborious to change gears, and usually works with the gear shifting motor, and the switching speed is slow, so it is not suitable for high-frequency gear shifting operations

[0004] In addition, a switch with a permanent magnet structure, such as Patent No. CN201420176022.9 "A Bistable Permanent Magnet Mechanism", is provided with a magnetic core, an energy storage device, a magnetic control device, a limit device and an operating lever. The cooperation of the core and the permanent magnet can realize quick shifting, but since the electromagnetic coil can only generate magnetism and change the magnetic direction after being energized, the switch with this structure usually only has two or three gears, which cannot meet the needs of multiple gears. switch requirements

Images