CN219066602U - Voltage transformer convenient for replacing fuse - Google Patents

Abstract

The utility model relates to a voltage transformer with a fuse convenient to replace, which comprises a voltage transformer outer insulation, a voltage transformer body, a primary insulation sleeve, a primary elastic contact and a fuse. The method is characterized in that: the installation and the change operation of fuse can be carried out from the both ends of voltage transformer primary insulation cover, change the fuse need not to dismantle and remove the interior handcart of cubical switchboard just can accomplish, easy operation is convenient, labour saving and time saving, and does not receive narrow and small space restriction, and convenient daily maintenance and maintenance save the cost of labor, work efficiency is high.

Description

Voltage transformer convenient for replacing fuse

Technical Field

The utility model relates to a voltage transformer, in particular to a voltage transformer with a fuse convenient to replace.

Background

The voltage transformer is mainly used for measuring the voltage, power and electric energy of a line and protecting system equipment when the line fails. At present, a group of 3 voltage transformers are fixedly installed on a bottom plate of a handcart, then the handcart is pushed into a fixed position and is fixed, and primary elastic contacts of the 3 voltage transformers are contacted with primary copper bar contacts in the switch cabinet to form electric connection of a primary loop. Because the primary insulating sleeve of the voltage transformer is only provided with the front port, the fuse is also required to be installed into the primary insulating sleeve through the port while being connected with the primary elastic contact. After the voltage transformer is installed in the switch cabinet, if maintenance is needed and the fuse is replaced when a fault occurs, the handcart is pulled out of the switch cabinet by a certain distance by using special tool matching, and then the elastic contact is detached for the next time, so that the maintenance and replacement operation of the fuse can be completed. The fuse is changed from the primary elastic contact end, so that the problems of time and labor waste in operation and low working efficiency exist, and if the space is narrow, the operation is more difficult, and inconvenience is brought to daily maintenance and overhaul.

Disclosure of Invention

The utility model aims to provide the voltage transformer capable of conveniently replacing the fuse, which is simple to operate, time-saving and labor-saving and high in working efficiency, and a handcart in a switch cabinet is not required to be disassembled for maintenance and replacement of the fuse.

The technical scheme of the utility model is as follows: the utility model provides a conveniently change voltage transformer of fuse, includes voltage transformer external insulation, voltage transformer ware body, once insulating cover, once elastic contact, fuse, its characterized in that once insulating cover's both ends be equipped with the opening respectively, wherein be connected with detachable once elastic contact on the front end port, be connected with detachable insulating end cap subassembly on the back port, the fuse sets up in once insulating cover, its one end and once elastic contact, the other end and insulating end cap subassembly contact, once elastic contact forms the electricity with voltage transformer ware body and is connected through fuse, insulating end cap subassembly.

The insulation plug assembly consists of insulation plugs, embedded nuts and large nuts, wherein at least 2 embedded nuts distributed according to a certain distance are embedded in a primary insulation sleeve, the embedded nuts are electrically connected with a voltage transformer body, mounting holes are formed in positions, opposite to the embedded nuts, of the large nuts, the large nuts are fixed on the embedded nuts through connecting pieces, the insulation plugs are formed by casting a metal backseat sleeve and epoxy resin together, an exposed part of the metal backseat sleeve is provided with external threads and connected with internal threads of a central hole of the large nut, and the insulation plugs seal rear ports of the primary insulation sleeve.

The inner wall of the metal backseat sleeve is provided with a strip-shaped contact finger with an annular inner wall, and the metal backseat sleeve is tightly contacted with the fuse through the strip-shaped contact finger.

The utility model is characterized in that: the installation and the change operation of fuse can be carried out from the both ends of voltage transformer primary insulation cover, change the fuse and need not to dismantle and remove the interior handcart of cubical switchboard just can accomplish, easy operation is convenient, labour saving and time saving, and does not receive narrow and small space restriction, makes things convenient for voltage transformer's routine maintenance and maintenance, saves the cost of labor, improves work efficiency.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic structural view of the insulating plug of the present utility model.

Detailed Description

The utility model is further described in detail below with reference to the attached drawing figures:

as shown in fig. 1 and 2, the voltage transformer for conveniently replacing the fuse mainly comprises a voltage transformer outer insulator 2, a voltage transformer body 1, a primary insulating sleeve 16, a primary elastic contact 7, the fuse 3 and an insulating plug assembly. The primary insulating sleeve is formed integrally with the outer insulation of the voltage transformer, two ends of the primary insulating sleeve are respectively opened, the front end of the primary insulating sleeve is connected with a detachable primary elastic contact, the primary elastic contact is in threaded connection with a large nut 15, three mounting holes distributed along the circumferential direction are formed in the large nut, the mounting holes are fixed on a corresponding embedded nut 14 through screws, and the embedded nut is embedded in the primary insulating sleeve. The primary elastic contact is electrically connected with the fuse through the spring 8, the elastic force of the spring forms axial acting force, and tight combination of the components is ensured. The connection structure, the structure and technical parameters of the voltage transformer body, the external insulation and the like can be designed according to requirements, and are the same as those in the prior art, and are not repeated. The detachable insulating plug assembly connected with the rear end of the primary insulating sleeve consists of an insulating plug 6, an embedded nut 4 and a large nut 5. At least 2 embedded nuts are arranged, in the embodiment, 3 embedded nuts are embedded in the primary insulating sleeve at certain intervals, the embedded nuts are electrically connected with the voltage transformer body, mounting holes are formed in positions, opposite to the embedded nuts, of the large nut 5, and the large nut is fixedly connected to the embedded nuts through screws. The insulating plug is formed by casting the metal backseat sleeve 11 and the epoxy resin 10 together, the exposed part of the metal backseat sleeve is provided with external threads, the inner end of the insulating plug stretches into the primary insulating sleeve, the external threads on the metal backseat sleeve are connected with the internal threads of the central hole of the large nut, and the insulating plug plugs the primary insulating sleeve. The strip-shaped contact fingers 12 with annular inner walls are arranged on the inner wall of the metal backseat sleeve, pawls of the strip-shaped contact fingers are embedded into grooves of the inner wall of the metal backseat sleeve, and the strip-shaped contact fingers are fixed through the steel wire check ring 13, so that the fuse is reliably connected with the metal backseat sleeve. An insulating sealing ring 9 is arranged between the insulating plug and the primary insulating sleeve, and a handle 17 convenient to operate is arranged at the outer end of the insulating plug.

When the product is assembled, the fuse can be installed from the two ends of the primary insulating sleeve, one end of the fuse is connected with the primary elastic contact, the other end of the fuse is positioned in the metal backseat sleeve, the fuse is limited by the axial force of the spring, the fuse is radially limited by the strip-shaped contact fingers, and the tight contact between the components is ensured, so that reliable electric connection is formed among the primary elastic contact, the fuse, the metal backseat sleeve, the large nut, the embedded nut and the voltage transformer body. The product is installed in the cubical switchboard, and the change of fuse can be operated at insulating end that blocks up, need not to dismantle other parts and just can accomplish.

Claims (3)

1. The utility model provides a conveniently change voltage transformer of fuse, includes voltage transformer external insulation, voltage transformer ware body, once insulating cover, once elastic contact, fuse, its characterized in that once insulating cover's both ends be equipped with the opening respectively, wherein be connected with detachable once elastic contact on the front end port, be connected with detachable insulating end cap subassembly on the back port, the fuse sets up in once insulating cover, its one end and once elastic contact, the other end and insulating end cap subassembly contact, once elastic contact forms the electricity with voltage transformer ware body and is connected through fuse, insulating end cap subassembly.

2. The voltage transformer for conveniently replacing the fuse according to claim 1, wherein the insulation plug assembly is composed of an insulation plug, embedded nuts and a large nut, wherein at least 2 embedded nuts distributed according to a certain interval are embedded in a primary insulation sleeve, the embedded nuts are electrically connected with a voltage transformer body, a mounting hole is formed in a position, opposite to the embedded nuts, of the large nut, the large nut is fixed on the embedded nuts through a connecting piece, the insulation plug is formed by casting a metal backseat sleeve and epoxy resin together, an exposed part of the metal backseat sleeve is provided with external threads and is connected with internal threads of a central hole of the large nut, and the insulation plug seals a rear port of the primary insulation sleeve.

3. The voltage transformer for conveniently replacing a fuse according to claim 1, wherein the metal backseat sleeve is provided with a strip-shaped contact finger with an annular inner wall on the inner wall of the metal backseat sleeve, and the metal backseat sleeve is tightly contacted with the fuse through the strip-shaped contact finger.

Images