CN202711944U - 35 kV and below plug-in current transformer - Google Patents

Abstract

The utility model discloses a 35kV and below plug-in current transformer. A socket is arranged on the current transformer, and a plurality of groups of jacks are arranged in the socket, and each group of jacks is two and respectively connected to the current transformer. The secondary winding terminals in the transformer are connected; a plug connected to the secondary current line is provided, and multiple sets of copper rods are arranged on the plug, and each set of copper rods is two and connected with each set of jacks on the socket respectively. Correspondingly; each set of jacks is provided with a movable metal sheet that is connected to the two jacks, and when the plug is inserted into the socket, the movable metal sheet is disconnected from the jack. The utility model's 35kV and below plug-in current transformer changes the previous method that various current transformers need to use many screws to fasten the terminal, but realizes the secondary current of the current transformer through the aviation plug.

Description

35kV and below plug-in current transformer

Technical field:

The utility model relates to a 35kV and below plug-in current transformer.

Background technique:

At present, many domestic switch factories produce 35kV and 10kV switch cabinets. With the advancement of technology, the size of switchgear is getting smaller and smaller. The upper and lower isolation switches, switch body and current transformer are installed in the switch cabinet. All devices are tightly connected without extra space. This causes great inconvenience to personnel entering and leaving the switchgear for equipment maintenance or replacement of rheology.

As shown in Figure 1, at present, the secondary wiring mode of the current transformer in the domestic 35kV and 10kV switchgear is mainly that the secondary current line 1 is connected to the terminal 4 of the secondary lead junction box 3 of the current transformer 2 and the terminal on the switchgear Row. Due to the narrow space of the switch cabinet in this way, it is inconvenient to enter the switch cabinet to overhaul, test and replace the current transformer.

Invention content:

In order to overcome the defects of the prior art, the purpose of this utility model is to provide a 35kV and below plug-in current transformer, which can be used in 35kV or 10kV switch cabinets with a new type of aviation plug. The plug-in current transformer has simple structure, fast installation and good application prospect.

The utility model solves the technical problem and adopts the following technical solutions:

For 35kV and below plug-in current transformers, sockets are arranged on the current transformers, and multiple sets of jacks are arranged in the sockets, each set of jacks is two and connected with the secondary windings in the current transformer respectively. terminal connection;

A plug connected to the secondary current line is provided, and multiple groups of copper rods are arranged on the plug, and each group of copper rods is two and corresponds to each group of jacks on the socket;

Each set of sockets is provided with a movable metal sheet that is connected to the two sockets, and the movable metal sheet is disconnected from the socket when the plug is inserted into the socket.

Both ends of the socket are provided with screw holes, and the two ends of the plug are correspondingly provided with screw rods matching the screw holes.

An insulating boss is provided between each group of copper rods.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The plug-in current transformer of 35kV and below of the utility model is changed from the previous method that all kinds of current transformers need to use many screws to fasten the terminals, but the secondary current of the current transformer is drawn out through the aviation plug.

2. The 35kV and below plug-in current transformer of the utility model has simple structure, fast installation and convenient maintenance.

3. The upper and lower jacks of the 35kV and below plug-in current transformer socket of the utility model are connected by movable metal sheets. When the plug is not tightly inserted into the socket, the upper and lower holes are automatically connected; The boss automatically pushes away the metal sheet, and the secondary current can guide the terminal block of the switch cabinet, and through the transfer of the terminal block, the secondary current can be sent to the protection device, metering device, etc. The design of this aviation plug can effectively avoid the secondary open circuit of the current transformer.

Description of drawings:

Fig. 1 is a structural diagram of an existing current transformer; Fig. 2 is a structural diagram of a practical current transformer; Fig. 3 is a structural diagram of a plug used in conjunction with the utility model; Fig. 4 is an enlarged view of part A of Fig. 2 .

Labels in the figure: 1 secondary current wire, 2 current transformer, 3 junction box, 4 terminal block, 5 plug, 6 jack, 7 socket, 8 copper rod, 9 movable metal sheet, 10 screw hole, 11 screw rod.

The utility model will be further described below through specific embodiments in conjunction with the accompanying drawings.

Detailed ways:

Embodiment: In combination with Fig. 1-4, plug-in current transformers of 35kV and below in this embodiment, sockets 5 are set on the current transformer 2, and multiple sets of jacks 6 are arranged in the sockets, each set of jacks is two And respectively connected with the secondary winding terminals in the current transformer; according to the winding of the current transformer, the jacks are 4 holes, 6 holes, and 8 holes.

A plug 7 connected to the secondary current line 1 is provided, and multiple groups of copper rods 8 are arranged on the plug 7, and each group of copper rods is two and corresponds to each group of jacks on the socket respectively; each group of plugs The hole is provided with a movable metal sheet 9 connected to the two jacks, the middle back of the movable metal sheet is connected with one end of the spring, and the other end of the spring is fixedly connected in the socket and insulated. Both ends of the socket 5 are provided with screw holes 10, and the two ends of the plug are correspondingly provided with screw rods 11 matching the screw holes. An insulating boss 12 is arranged between each group of copper rods.

Every two upper and lower jacks of the socket 5 are connected by movable metal sheets 9. When the plug is not tightly inserted into the socket 5, the movable metal sheets 9 are automatically connected to the upper and lower sockets to short-circuit the secondary winding; The insulating boss 12 of the plug compresses the spring on the back of the movable metal sheet, the movable metal sheet is disconnected from the socket, the copper rod of the plug is connected to the socket, and the secondary current line 1 connected with the copper rod can connect the current transformer 2 The secondary current guides the terminal block of the switchgear, and through the transfer of the terminal block, the secondary current can be sent to the protection device, metering device, etc. The design of the aviation plug in this embodiment can effectively avoid the secondary open circuit phenomenon of the current transformer.

Mode of use: the current transformer of the present utility model should be used in conjunction with the plug 7 . After the plug 7 and the socket 5 are inserted tightly, the screw rod 11 is fastened in the screw hole 10 of the socket with a screwdriver, and the plug can be fixed on the socket.

The usage mode of the utility model:

In the case of switch cabinet maintenance, use a screwdriver to unscrew the screw 11, and then pull out the plug 7, then the current transformer can be repaired, replaced and tested; when restoring, first press the plug on the socket, and then tighten the screw with a screwdriver 11, you can restore the normal device status.

Claims (3)

1.35kV and following plug-in current transformer, it is characterized in that, at described current transformer (2) socket (5) is set, is provided with many group jacks (6) in described socket, every group of jack is two and is connected with secondary winding terminal in the current transformer respectively;

The plug (7) that is connected with secondary electric streamline (1) is set, is provided with many group copper bars (8) at described plug (7), every group of copper bar is two and corresponding with every group of jack on the socket respectively;

Be provided with the live metal sheet (9) with two jack conductings in described every group of jack, described live metal sheet (9) disconnects with jack in the time of in the described plug insertion socket.

2. 35kV according to claim 1 and following plug-in current transformer is characterized in that, the two ends of described socket (5) are provided with screw (10), and the two ends correspondence of described plug is provided with the screw rod (11) with described screw coupling.

3. 35kV according to claim 1 and following plug-in current transformer is characterized in that, are provided with insulation boss (12) between described every group of copper bar.

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