CN103337760B - CT, PT secondary short circuit line - Google Patents

Abstract

The invention discloses a secondary short circuit for CT and PT, which includes first, second and third clips connected together, and each of the three clips includes a first clip and a second clip connected by a clip shaft When the front ends of the first clip and the second clip are engaged, a joint is formed, and a groove is formed in the middle when the joint is closed; one end of the first clip of the first clip is provided with an insulating sleeve, and the second clip is connected with a A connection part that is externally insulated and internally conductive; the first clip of the second clip is connected to a wire, and the other end of the wire is provided with a conductive connection terminal with a conductive terminal on the top and a conductive jack at the tail; the second clip of the three clips The clips have the same structure, and the third clip has the same structure as the second clip; the conductive terminal of the second clip is inserted into the connecting part of the first clip, and the conductive terminal of the third clip is inserted into the conductive socket of the second clip to form a current path. The CT and PT secondary short circuit can form a reliable short circuit, simplify operation, and effectively ensure the personal safety of operators.

Description

CT, PT secondary short wiring

technical field

The invention relates to a common tool in an electric power system, in particular to a secondary short circuit for CT and PT.

Background technique

In the daily power system, a metal wire or a screwdriver plus a bare wire is usually used for secondary short-circuiting of current transformers (CT) and voltage transformers (PT), which cannot form reliable short-circuits and also poses safety hazards. Especially in the handover test of power distribution equipment, when the protection coil is used to measure the insulation resistance of the metering coil and the measuring coil, due to the short distance between the CT and PT secondary coils and the small coil gap, it is not only inconvenient to operate, but also easy to cause personal injury to the operator. harm.

Contents of the invention

In order to form a reliable short circuit when CT and PT are connected twice, simplify operation, and effectively ensure the personal safety of operators, the present invention provides a CT and PT secondary short circuit, which can solve the above technical problems. The technical solution is as follows:

A secondary short circuit for CT and PT, including first to third clips connected together, each of the three clips includes a first clip and a second clip connected by a clip shaft, the first clip The front part of the sheet and the second clip are engaged together to form a joint, and a groove is formed in the middle of the joint, and the shape of the groove matches the shape of the terminal, which is conducive to strengthening the bonding strength between the short wire and the terminal; The first clip of the first clip is provided with an insulating sleeve at the end away from the occlusal part, and the second clip of the first clip is connected with a connecting part at the end far away from the occlusal part, and the connecting part is externally insulated and internally conductive; The first clip of the second clip is connected with a wire, the other end of the wire is provided with a conductive connection terminal, the top of the conductive connection terminal is provided with a conductive terminal, and the tail is provided with a conductive jack; the second clip of the second clip The structure of the clip is the same as that of the second clip of the first clip; the structure of the third clip is the same as that of the second clip; the conductive terminal of the second clip is inserted into the connecting part of the first clip, and the conductive terminal of the third clip Insertion of the conductive socket of the second clip forms a current path.

The contact surfaces of the occlusal parts of the three clips are serrated.

The CT and PT secondary short-circuits are tightly connected to the terminal, can form a reliable short-circuit, are easy to operate, and effectively guarantee the personal safety of the operator.

Description of drawings

Fig. 1 is CT, PT secondary short wiring structural diagram of the present invention;

Fig. 2 is a structure diagram of the second clip of the CT and PT secondary short circuit of the present invention.

detailed description

The structure of the CT and PT secondary short-circuit wires of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

As shown in Figures 1 and 2, a secondary short circuit for CT and PT includes first to third clips 1, 5, 6 connected together, and the three clips 1, 5, 6 all include The first clip and the second clip connected by the column, the front parts of the first clip and the second clip are snapped together to form a occlusal part, and a groove 2 is formed in the middle of the occlusal part, and the groove 2 The shape matches the shape of the terminal, which is conducive to strengthening the bonding strength between the short wire and the terminal; the first clip of the first clip 1 has an insulating sleeve 3 on the end away from the occlusal part, and the second of the first clip 1 The end of the clip away from the occlusal part is connected with a connecting part 10, the connecting part 10 is externally insulated and internally conductive; the first clip of the second clip 5 is connected with a wire 4, and the other end of the wire 4 is provided with a conductive connection Terminal 7, the top of the conductive connection terminal 7 is provided with a conductive terminal 9, and the tail is provided with a conductive jack 8; the second clip of the second clip 5 has the same structure as the second clip of the first clip 1; The third clip 6 has the same structure as the second clip 5; the conductive terminal 9 of the second clip 5 is inserted into the connection part of the first clip 1, and the conductive terminal 9 of the third clip 6 is inserted into the conductive insertion hole of the second clip 5 8 to form a current path.

The contact surfaces of the occlusal parts of the three clips 1, 5, 6 are serrated.

When in use, connect the second clip 5 and the third clip 6 to the terminal of the equipment respectively, and connect the first clip 1 to the grounding wire. The CT and PT secondary short wires are closely connected to the terminal, and the grounding is reliable, which effectively guarantees The personal safety of the operator.

Claims (2)

1. A secondary short circuit for CT and PT, comprising first to third clips (1, 5, 6) connected together, characterized in that: the three clips (1, 5, 6) all include The first clamping piece and the second clamping piece connected by the clamp shaft column, the front parts of the first clamping piece and the second clamping piece are snapped together to form a joint, and a groove (2) is formed in the middle of the joint; The first clip (1) of the first clip (1) has an insulating sleeve (3) at the end far away from the occlusal part, and the second clip (1) of the first clip (1) is connected with a connecting part (10) at the end far away from the occlusal part, so The connecting part (10) is externally insulated and internally conductive; the first clip of the second clip (5) is connected with a wire (4), and the other end of the wire (4) is provided with a conductive connection terminal (7), The top of the conductive connection terminal (7) is provided with a conductive terminal (9), and the tail is provided with a conductive jack (8); the second clip of the second clip (5) is connected with the second clip of the first clip (1). The clips have the same structure; the third clip (6) has the same structure as the second clip (5); the conductive terminal (9) of the second clip (5) is inserted into the connecting part (10) of the first clip (1) , the conductive terminal (9) of the third clip (6) is inserted into the conductive insertion hole (8) of the second clip (5) to form a current path. 2. The CT and PT secondary short-circuit wire according to claim 1, characterized in that: the contact surfaces of the occlusal parts of the three clips (1, 5, 6) are serrated.