CN203721919U - Grounding wire used for cable plugging head of box type transformer - Google Patents

Abstract

A grounding wire used for a cable plugging head of a box type transformer comprises a three-phase grounding wire and a grounding wire clamp. The grounding wire further comprises three cable connectors which are used for connecting cable connecting ends of the three-phase grounding wire with the cable plugging head; a grounding end of the three-phase grounding wire is connected with the grounding wire clamp; each cable connecting end of the three-phase grounding wire is connected with one end of each cable connector; and the other end of the cable connector forms an plugging sleeve which is shaped to match with the cable plugging head of the box type transformer. The grounding wire of the utility model can be used for the grounding of the cable plugging head of the box type transformer so as to improve construction safety quality in cable maintenance and testing. The grounding wire used for the cable plugging head of the box type transformer has the advantages of small size, light weight, portable convenience, reliable insulation property, and convenient assembly and disassembly.

Description

A kind of grounding wire used for box-type transformer cable plug-in

technical field

The utility model relates to an electric grounding wire, in particular to a grounding wire used for a box-type transformer cable plug-in head.

Background technique

Due to its compact structure and small footprint, American box transformers are widely used in power systems. According to the requirements of the "Safety Regulations", both ends of the cable should be grounded when the cable is inspected and tested. At present, many street light transformers and public transformers in the power system are box-type transformers. The box-type transformers are connected with cables, basically using plug-in cable heads. , it is difficult to short-circuit the three phases and ground the cable head near the end of the box-type transformer.

At present, the three-phase short-circuit wires sold on the market cannot be used for the grounding of this type of cable head, so it is not convenient for cable inspection and testing of this type of transformer, and there are great potential safety hazards in cable inspection and testing.

Utility model content

The main purpose of the utility model is to overcome the shortcomings of the prior art and provide a cable plug-in plug for box-type transformers that can be used for grounding to improve the construction safety and quality of cable maintenance and testing. the ground wire.

The utility model adopts the following technical solutions:

A grounding wire for a box-type transformer cable plug, including a three-phase grounding wire and a grounding clip, and also includes a cable connection end for connecting the three-phase grounding wire and three cable connections for the cable plugging head The grounding end of the three-phase grounding wire is connected to the grounding clamp, the cable connection end of the three-phase grounding wire is connected to one end of the cable connector, and the other end of the cable connector forms a cable plug-in shape with the box-type transformer. Compatible sockets.

Further, one end of the cable connector forms a connection sleeve for fixing the cable connection end of the three-phase grounding wire, and the cable connection end of the three-phase grounding wire is crimped to the copper terminal and locked to the socket by bolts and nuts. inside the connecting sleeve.

Further, the cable connection end of the three-phase grounding wire is locked in the connection sleeve of the cable connector, and then wound as a whole with an insulating self-adhesive tape of the same voltage level as the box-type transformer, and an insulating shell is placed outside it.

Further, the ground end of the three-phase ground wire is crimped to the copper terminal and locked to the ground wire clip by bolts and nuts.

Further, the middle part of the outer wall of the cable connector protrudes to define a snap ring.

From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the beneficial effect that it can be used for grounding of the cable plug-in connector of the box-type transformer, so as to improve the construction safety quality during cable maintenance and testing, and the volume is small , Light weight, easy to carry, and reliable insulation properties, easy to assemble and disassemble.

Description of drawings

Fig. 1 is the three-dimensional structural diagram of the specific embodiment of the present utility model;

Fig. 2 is a partial structural perspective view of a specific embodiment of the present invention.

In the figure: 1. Three-phase grounding wire, 2. Grounding wire clamp, 3. Cable connector, 30. Connecting sleeve, 31. Inserting tube, 32. Limiting snap ring, 4. Copper terminal.

Detailed ways

The utility model will be further described below through specific embodiments.

Referring to Fig. 1 and Fig. 2, a grounding wire used for a box-type transformer cable plug of the utility model includes a three-phase grounding wire 1, a grounding wire clip 2 and a cable for connecting the three-phase grounding wire 1 Three cable connectors 3 for connection end and cable plug. When used in a box-type transformer with a voltage level of 10KV, the ground end of the three-phase ground wire 1 is crimped to the copper terminal 4 and then locked on the ground clamp 2 through bolts and nuts; one end of the cable connector 3 forms a The connection sleeve 30 used to fix the cable connection end of the three-phase ground wire 1, the cable connection end of the three-phase ground wire 1 is crimped with the copper terminal 4 and then locked in the connection sleeve 30 by bolts and nuts , and then wound with 10KV insulating self-adhesive tape as a whole, and an insulating shell is placed on it, so that it can withstand a certain residual voltage of the cable, so as to ensure that the staff will not be damaged by electric shock when inserting the cable plug; the cable connector 3. The other end forms a plug-in tube 31 matching the shape of the cable plug-in head of the 10KV box-type transformer. The middle portion of the outer wall of the cable connector 3 protrudes to define a snap ring 32 .

Referring to Fig. 1 and Fig. 2, the wire section of the three-phase grounding wire 1 is 25mm ² , and its grounding end and the cable connection end are both crimped by copper terminals 4 of 25mm ² .

With reference to Fig. 1 and Fig. 2, when the utility model is used for the cable maintenance of 10KV box-type transformer, test, comprises the following operation steps:

① Complete the "two tickets" power outage operation, and take safety measures;

② Tighten the grounding wire frame of the device with the grounding flat iron on site so that the two are in close contact;

③ Unplug the cable plug at one end of the 10KV box-type transformer, and insert it into the three plug-in tubes 31 of the cable connector 3 of the present utility model phase by phase, so that the three-phase grounding wire 1 is connected to the conductive rod in the cable plug. Full contact to reduce contact resistance.

The above is only a specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, any non-substantial modification of the utility model by using this concept should be an act of violating the protection scope of the present utility model .

Claims (5)

1. the earth connection for box type transformer cable plug head, include three-phase type earth connection and earthing clamp, it is characterized in that: also include for connecting the cable link of three-phase type earth connection and three cable connectors of cable plug head, the earth terminal of described three-phase type earth connection is connected in earthing clamp, the cable link of three-phase type earth connection is connected in cable connector one end, and the cable connector other end forms the insertion pipe matching with the cable plug head shapes of box type transformer.

2. a kind of earth connection for box type transformer cable plug head as claimed in claim 1, it is characterized in that: described cable connector one end is formed for the fixedly joint sleeve of the cable link of three-phase type earth connection, after the cable link crimping copper tip of described three-phase type earth connection, pass through bolt and nut check in described joint sleeve.

3. a kind of earth connection for box type transformer cable plug head as claimed in claim 2, it is characterized in that: the cable link of described three-phase type earth connection lock onto in the joint sleeve of cable connector and is wound up as one by the insulating self-adhesive band identical with box type transformer electric pressure, and outside it sheathed insulation crust.

4. a kind of earth connection for box type transformer cable plug head as claimed in claim 1, is characterized in that: after the earth terminal crimping copper tip of described three-phase type earth connection, pass through bolt and nut check on earthing clamp.

5. a kind of earth connection for box type transformer cable plug head as claimed in claim 1, is characterized in that: the outer wall middle part of described cable connector is protruded and is formed with restriction snap ring.