Primary fuse operable outdoor voltage transformer assembly

Abstract

The invention relates to a primary fuse operable outdoor voltage transformer assembly which is used for fault protection of an outdoor high voltage circuit. The primary fuse operable outdoor voltage transformer assembly comprises a voltage transformer (1), a fuse and an operating rod (3), wherein the top of the fuse is connected with the voltage transformer (1) by virtue of a rotary bayonet, the bottom of the fuse is movably connected with the top of the operating rod (3), the fuse is sent into the voltage transformer (1) by virtue of the operating rod (3), or the fuse is withdrawn from the voltage transformer (1) by virtue of the operating rod (3). Compared with the prior art, the voltage transformer is of an epoxy resin poured insulation fully-closed structure and has characteristics such as electric arc resistance, ultraviolet resistance, aging resistance, large creep distance, small local discharge capacity, high overvoltage resistance and the like, the fuse can be replaced without power failure, the operation is flexible, the safety is high, the blackout time of an outdoor circuit can be reduced, the power-down loss can be reduced, and the user satisfaction can be improved.

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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