CN203659733U - Outdoor high-voltage demarcation vacuum circuit breaker - Google Patents

Abstract

The utility model provides an outdoor high-voltage demarcation vacuum circuit breaker. When a T-joint branch circuit of a 10kV overhead power distribution line breaks down, an outlet switch of a transformer substation trips. The outdoor high-voltage demarcation vacuum circuit breaker includes a shell (1). An inlet/outlet wire sleeve (2) is installed on the lower part of the shell. An insulating box (3) is installed on the lower part in the shell. A vacuum arc extinguishing chamber (4) is installed in the insulating box. The vacuum arc extinguishing chamber is connected with the inlet/outlet wire sleeve (2). The vacuum arc extinguishing chamber is connected with an insulation pull rod (5). The insulation pull rod (5) is connected with a main shaft (6). A zero-sequence current transformer (7) and an A/C phase current transformer (8) are installed in the shell. The shell is connected with the upper shell (9). An anti-explosion device (10) is installed on the upper cover. The upper cover is connected with the hoisting device (11). A fixed cross rod (12) is installed on the hoisting device. The utility model is suitable for a vacuum circuit breaker.

Description

Outdoor high voltage boundary vacuum circuit breaker

Technical field:

The utility model relates to an outdoor high-voltage boundary vacuum circuit breaker.

Background technique:

When the 10KV overhead distribution line T is connected to the branch line or the internal failure of the end user, because the protection action time limit of the incoming line switch and the protection time limit of the substation outgoing line switch cannot be reasonably adjusted, it will cause the substation outgoing line switch to trip. If the nature of the fault is permanent, substation reclosing will not be successful, and a local accident in a medium-voltage user community will cause a power outage of the entire 10KV distribution line. If a user boundary switch (commonly known as a watchdog) is installed at the T junction or the user end (responsibility demarcation point), after judgment and confirmation of a fault (overcurrent, short circuit, single-phase grounding, etc.) Isolation can ensure the normal power consumption of users in non-faulty areas.

Utility model content:

The purpose of the utility model is to provide an outdoor high-voltage boundary vacuum circuit breaker.

Above-mentioned purpose realizes by following technical scheme:

An outdoor high-voltage demarcation vacuum circuit breaker, which consists of: a casing, an inlet and outlet bushing is installed at the lower part of the casing, an insulating box is installed at the inner lower part of the casing, and a vacuum arc extinguishing box is installed in the insulating box chamber, the vacuum interrupter is connected with the inlet and outlet bushings, the vacuum interrupter is connected with the insulating rod, the insulating rod is connected with the main shaft, and a zero-sequence Current transformer, A/C phase current transformer, the shell is connected with the upper cover, an explosion-proof device is installed on the upper cover, the upper cover is connected with the lifting device, on the lifting device A fixed cross arm is installed.

In the outdoor high-voltage boundary vacuum circuit breaker, the explosion-proof device is a Z-shaped plate, the lower end plate of the Z-shaped plate is fixed on the upper cover by bolts, and the outer shell and the upper cover The seal between them is connected by stamping groove sealing, the inlet and outlet sleeves are integrally poured with epoxy resin and silicon rubber, and the A and C phases of the A/C phase current transformer use corner sleeves.

Beneficial effect:

The utility model has fault detection function, protection control function and communication function, can reliably judge and detect milliampere-level zero-sequence current and phase-to-phase short-circuit fault current inside and outside the boundary, and realize automatic removal of single-phase grounding fault and phase-to-phase short-circuit fault.

The utility model adopts vacuum arc extinguishing and SF6 gas as the insulating medium, has excellent overall sealing performance, and the SF6 gas charged inside does not leak and is not affected by the external environment.

The action reliability and stability of the utility model are 2 to 4 times better than that of the domestic traditional spring operating mechanism; Small, low temperature rise.

The utility model is sealed by stamping forming grooves, the output pointer shaft is sealed by double-layer "O" rings, and the inlet and outlet sleeves are integrally poured to ensure good air tightness.

Description of drawings:

Accompanying drawing 1 is the structural representation of the utility model.

Detailed ways:

Example 1:

An outdoor high-voltage boundary vacuum circuit breaker, which consists of: a casing 1, an incoming and outgoing line bushing 2 is installed at the lower part of the casing, an insulating box 3 is installed at the lower part of the casing, and an insulating box 3 is installed in the insulating box The vacuum interrupter 4, the vacuum interrupter is connected with the inlet and outlet bushing, the vacuum interrupter is connected with the insulating rod 5, and the insulating rod is connected with the main shaft 6, in the A zero-sequence current transformer 7 and an A/C phase current transformer 8 are installed in the casing, the casing is connected to the upper cover 9, and an explosion-proof device 10 is installed on the upper cover, and the upper cover is connected to the lifting The device 11 is connected, and a fixed cross arm 12 is installed on the lifting device.

Example 2:

According to the outdoor high-voltage boundary vacuum circuit breaker described in Embodiment 1, the explosion-proof device is a Z-shaped plate, the lower end plate of the Z-shaped plate is fixed on the upper cover by bolts, and the outer shell and the The seal between the above-mentioned upper covers is sealed and connected by stamping grooves, the inlet and outlet bushings are integrally cast with epoxy resin and silicon rubber, and the A and C phases of the A/C phase current transformers use corners casing.

Claims (2)

1. an outdoor high-voltage demarcation vacuum circuit breaker, its composition comprises: shell, it is characterized in that: at described outer casing underpart, inlet-outlet sleeve is installed, in described shell, bottom is provided with insulation booth, in described insulation booth, vacuum interrupter is installed, described vacuum interrupter is connected with described inlet-outlet sleeve, described vacuum interrupter is connected with insulated tension pole, described insulated tension pole is connected with main shaft, in described shell, zero sequence current mutual inductor is installed, A/C phase current mutual inductor, described shell is connected with upper cover, cover on described explosion-protection equipment is installed, described upper cover is connected with boom hoisting, fixing cross-arm is installed on described boom hoisting.

2. outdoor high-voltage demarcation vacuum circuit breaker according to claim 1, it is characterized in that: described explosion-protection equipment is Z-shaped plate, on described in the bottom plate of described Z-shaped plate is bolted on, cover, sealing between described shell and described upper cover adopts punch forming groove to be tightly connected, described inlet-outlet sleeve employing epoxy resin and silicon rubber are integrated poured, and A, the C two-phase of described A/C phase current mutual inductor adopt turning sleeve pipe.

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