An outdoor voltage transformer assembly with a primary fuse operable

Abstract

The invention relates to a primary fuse-operable outdoor voltage transformer assembly, which is used for fault protection of outdoor high-voltage lines, including a voltage transformer (1), a fuse and an operating rod (3), the fuse top and The voltage transformer (1) is connected through the rotating bayonet, the bottom of the fuse is connected flexibly with the top of the operating rod (3), and the fuse is fed into the voltage transformer (1) through the operating rod (3), or the fuse is fed into the voltage transformer (1) through the operating rod (3) Pull the fuse out of the voltage transformer (1). Compared with the prior art, the voltage transformer of the present invention is an epoxy resin cast insulating fully enclosed structure, which has the characteristics of arc resistance, ultraviolet resistance, aging resistance, large creepage distance, small partial discharge, and strong overvoltage resistance. Fuse replacement does not require power-off operation, flexible operation, and high safety, so as to reduce the power-off time of outdoor circuits, reduce power-off losses, and improve user satisfaction.

Description

technical field [0001] The invention relates to a voltage transformer, in particular to an outdoor voltage transformer assembly with an operable primary fuse. Background technique [0002] In order to ensure the safe and stable operation of the power grid and improve the reliability of power supply, in recent years, the pole-mounted vacuum circuit breaker has been used to replace the pole-mounted load switch, because the pole-mounted vacuum circuit breaker has many advantages, such as basically maintenance-free, and after setting the protection value, it can be used in case of short-circuit current. It can effectively cut off the fault point by itself, effectively ensuring the safe and stable operation of the power grid and the reliability of power supply. [0003] However, the line must be in a power outage state during the installation process of the pole-mounted vacuum circuit breaker, resulting in an increase in the number of line outages, an increase in the power outage...

AI Technical Summary

Problems solved by technology

[0003] However, the line must be in a power outage state during the installation of the vacuum circuit breaker on the column, resulting in an increase in the number of line outages, an increase in the power outage time, and a low economic efficiency of the grid operation

But nowadays, when installing a pole-mounted vacuum circuit breaker, a voltage transformer must be installed to supply power to the control box of the circuit breaker, and the voltage transformer has no disconnection point, and current will pass through when the voltage transformer is turned on, so live work cannot be performed overlap

The installation of the vacuum circuit breaker on the column must be powered off, which increases the amount of line operations, and the long installation time leads to longer waiting time for equipment users and increases the rate of user complaints

More importantly, if the voltage transformer fails, it will directly cause the line to trip, which will affect the safe and stable operation of the power grid.

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