CN104021970A - Electric power line double-knife combination linkage type low-voltage knife fuse switch - Google Patents

Abstract

Disclosed is an electric power line double-knife combination linkage type low-voltage knife fuse switch. The knife fuse switch comprises a pick hook, moving contact knives, a fusing angle plate, an insulator, a pick hanging plate, a pick hanging ring, a static contact seat, a pillar insulator, a base, a lower outlet wire, a linkage plate, a supporting seat and an upper outlet wire. The pick hook and the moving contact knives are connected, the fusing angle plate is installed on the moving contact knives, the insulator is installed between the moving contact knives and the pick hanging plate, the pick hanging plate is installed on the pillar insulator through a bolt, the static contact seat is installed on the pillar insulator, the pillar insulator is installed on the base, the lower outlet wire is connected with the static contact seat, the upper outlet wire is connected with the static contact seat, the linkage plate is connected between the two moving contact knives, and the pick hanging ring is connected with the pick hanging plate. The advantages are as follows: the installation method of a switch is simplified, and perfect combination of double-channel isolation knives is also ensured; and at the time when flow-dividing operation is realized, the switch operation reliability is guaranteed. Besides, the operation stability is improved, and manpower, material resources and financial resources are greatly saved.

Description

A low-voltage knife-melting switch with double-pole combined linkage type for power lines

technical field

The invention relates to a protection isolation device for a low-voltage transformer of a power line, in particular to a double-knife combined linkage type low-voltage knife melting switch for a power line.

Background technique

With the continuous increase of the user's electricity load, the capacity of the required transformer is mostly increased from a small capacity to more than 315kVA, and they are all operating under full load or overload. , when the rated current increases to more than 800A, the conductivity of the connection part of the fuse or the contact part between the moving and static blades will be greatly reduced, the contact resistance will increase, the temperature rise will increase, the contact will stick, the switch will burn out, and the line will be damaged. Proper operation is not guaranteed.

Contents of the invention

The purpose of the present invention is to realize two-way isolation, synchronous operation, jointly carry the operating load, reduce the operating temperature of the switch, improve the operating reliability and safety, and solve the problem of damage to the switch under abnormal conditions. Power line double-pole combined linkage low-voltage knife-melting switch.

The invention provides a low-voltage knife-melting switch with double-pole combination linkage type for power lines, which is characterized in that: the double-pole combination linkage type low-voltage knife-melt switch for power lines includes a hook 1, a movable contact knife 2, and a fusing angle plate 3. Insulator 4, hanging plate 5, hanging ring 6, static contact seat 7, post insulator 8, base 9, lower outgoing line 10, linkage plate 11, support seat 12, upper outgoing line 13;

Among them: the hook 1 is connected with the movable contact knife 2, the fuse angle plate 3 is installed on the movable contact knife 2, the insulator 4 is installed between the movable contact knife 2 and the hanging plate 5, and the hanging plate 5 is installed on the post insulator through bolts 8, the static contact seat 7 is installed on the post insulator 8, the post insulator 8 is installed on the base 9, the lower outgoing line 10 is connected to the static contact seat 7, the upper outgoing line 13 is connected to the static contact seat 7, and the linkage plate 11 is connected to two Between the movable contact knife 2, the hanging ring 6 is connected with the hanging plate 5.

The lower outgoing line 10 and the upper outgoing line 13 are connected with the two static contact seats 7 so as to make them fully contact, effectively form two branches, and realize the current shunting effect. The linkage plate 11 is a piece of rigid material, which plays a linkage role and avoids asynchronous separation and closing of the two moving contact blades.

Advantages of the present invention:

The installation method of the switch is simplified, and the perfect combination of the two-way isolating knife is guaranteed; while the shunt operation is realized, the occurrence of eddy current and poor contact heating is avoided through structural adjustment, so that the reliability of the switch operation is guaranteed. It avoids the phenomenon that the two-way movable contact blade is out of phase during the opening and closing operation; it improves the stability of the operation. The linkage device can realize the absolute synchronization of the two knife switches, avoiding various problems caused by asynchronous opening and closing, improving the stability of opening and closing, and eliminating the occurrence of human misoperation. It can be installed on most of the current mounting brackets without the need to redesign a specific mounting bracket for it. It greatly saves manpower, material resources and financial resources.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

Figure 1 is the front view of the double-pole combination linkage type low-voltage knife melting switch of the power line;

Fig. 2 is a top view of a double-pole combined linkage type low-voltage knife melting switch for power lines.

Detailed ways

Example 1

This embodiment provides a low-voltage knife-melting switch with double-pole combination linkage type for power lines, which is characterized in that: the double-pole combination linkage type low-voltage knife-melt switch for power lines includes a hook 1, a movable contact knife 2, a fusing angle Plate 3, insulator 4, hanging plate 5, hanging ring 6, static contact seat 7, post insulator 8, base 9, lower outgoing line 10, linkage plate 11, support seat 12, upper outgoing line 13;

Among them: the hook 1 is connected with the movable contact knife 2, the fuse angle plate 3 is installed on the movable contact knife 2, the insulator 4 is installed between the movable contact knife 2 and the hanging plate 5, and the hanging plate 5 is installed on the post insulator through bolts 8, the static contact seat 7 is installed on the post insulator 8, the post insulator 8 is installed on the base 9, the lower outgoing line 10 is connected to the static contact seat 7, the upper outgoing line 13 is connected to the static contact seat 7, and the linkage plate 11 is connected to two Between the movable contact knife 2, the hanging ring 6 is connected with the hanging plate 5.

The lower outgoing line 10 and the upper outgoing line 13 are connected with the two static contact seats 7 so as to make them fully contact, effectively form two branches, and realize the current shunting effect.

Example 2

This embodiment provides a low-voltage knife-melting switch with double-pole combination linkage type for power lines, which is characterized in that: the double-pole combination linkage type low-voltage knife-melt switch for power lines includes a hook 1, a movable contact knife 2, a fusing angle Plate 3, insulator 4, hanging plate 5, hanging ring 6, static contact seat 7, post insulator 8, base 9, lower outgoing line 10, linkage plate 11, support seat 12, upper outgoing line 13;

Among them: the hook 1 is connected with the movable contact knife 2, the fuse angle plate 3 is installed on the movable contact knife 2, the insulator 4 is installed between the movable contact knife 2 and the hanging plate 5, and the hanging plate 5 is installed on the post insulator through bolts 8, the static contact seat 7 is installed on the post insulator 8, the post insulator 8 is installed on the base 9, the lower outgoing line 10 is connected to the static contact seat 7, the upper outgoing line 13 is connected to the static contact seat 7, and the linkage plate 11 is connected to two Between the movable contact knife 2, the hanging ring 6 is connected with the hanging plate 5.

The lower outgoing line 10 and the upper outgoing line 13 are connected with the two static contact seats 7 so as to make them fully contact, effectively form two branches, and realize the current shunting effect.

The linkage plate 11 is a piece of rigid material, which plays a linkage role and avoids asynchronous separation and closing of the two moving contact blades.

Claims (2)

1. A low-voltage knife-melting switch with double-pole combination linkage type for power lines, characterized in that: the double-pole combination linkage type low-voltage knife-melt switch for power lines includes a hook (1), a movable contact knife (2), and a fuse Corner plate (3), insulator (4), hanging plate (5), hanging ring (6), static contact seat (7), post insulator (8), base (9), lower outlet (10), linkage Plate (11), support seat (12), upper outlet (13); Among them: the picking hook (1) is connected with the moving contact knife (2), the fuse angle plate (3) is installed on the moving contact knife (2), the insulator (4) is installed on the moving contact knife (2) and the hanging plate (5) ), the hanging plate (5) is installed on the post insulator (8) through bolts, the static contact seat (7) is installed on the post insulator (8), the post insulator (8) is installed on the base (9), and the bottom The outgoing line (10) is connected with the static contact seat (7), the upper outgoing line (13) is connected with the static contact seat (7), the linkage plate (11) is connected between the two moving contact knives (2), and the hanging ring (6 ) is connected with the hanging plate (5). 2. The double-pole combined linkage type low-voltage knife melting switch for power lines according to claim 1, characterized in that: the linkage plate (11) is a rigid material.