On-load capacity-regulating switch with single fracture

Abstract

The invention provides an on-load capacity-regulating switch with a single fracture, aiming at solving the technical problems that the switching task of transformer windings needs to be finished when a transformer is on load and overcoming the technical difficulty of unreliable arc quenching when a high-voltage side contact is subjected to star-to-angle switching. The on-load capacity-regulating switch is mainly characterized by comprising two main contact connecting wires and a transitional contact connecting wire, wherein a transitional resistor and a second vacuum arc-quenching chamber areconnected to the transitional contact connecting wire in series; one main contact connecting wire is an angle-joint main contact connecting wire provided with a first vacuum arc-quenching chamber, and the other main contact connecting wire is a star main contact connecting wire provided with a third vacuum arc-quenching chamber; and the on-load capacity-regulating switch is also provided with a driving device for driving all the vacuum arc-quenching chambers. The on-load capacity-regulating switch has the advantage that the arc quenching can be reliably realized just by arranging one fracture.

Description

technical field [0001] The invention relates to an on-load capacity regulating switch used on a transformer. Background technique [0002] At present, the method of performing star-angle transformation on the transformer without cutting off the power supply of the transformer is to first disconnect the original star connection or delta connection, wait for a period of time after the arc is off (tens of milliseconds), and then switch the transformer Connected into delta or star connection. In such an operation process, an operating overvoltage will be generated when the transformer is disconnected, and an impact will be generated when the transformer is connected again. At the same time, the period of waiting for arc extinguishing will also cause the suspension of power supply. To complete the switching task of the transformer winding when the transformer is loaded, the main technical difficulty is: the high-voltage side contacts can realize reliable arc extinguishing when ...

AI Technical Summary

Problems solved by technology

In such an operation process, an operating overvoltage will occur when the transformer is disconnected, and an impact will occur when the transformer is connected again.

At the same time, the period of waiting for arc extinguishing will also cause the suspension of power supply.

When the transformer is loaded, it is necessary to complete the switching task of the transformer winding. The main technical difficulty is: the high-voltage side contact can realize reliable arc extinguishing when the star angle is switched.

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