CN201392371Y - A device for CT coil test - Google Patents

Abstract

The utility model relates to a device for a CT coil test, comprising at least one unit used for being connected with a CT coil secondary side winding and an experiment instrument, wherein each unit comprises at least one pair of wiring parts used for being connected with a group of secondary side windings of the CT coil and a switch corresponding to the wiring pair; and each pair of wiring parts is connected with the switch corresponding to the wiring part in parallel. The device for the CT coil test is used for solving the problem of needing repeated wiring in the process of the test.

Description

A device for CT coil test

technical field

The utility model relates to a device for testing a CT coil, which belongs to the field of testing current transformers.

Background technique

At present, with the rapid development of the power system, the demand for CT coils is increasing, which also brings more workload to the CT coil test. When the CT is energized at the first time, the second time must be short-circuited, and the second open circuit operation is strictly prohibited. In order to improve production efficiency during the CT coil test, generally multiple coils are fed with the specified primary current, so it is required that only one of the coils can be tested at a time, and the outlets of other CT coils must be short-circuited. During the test, the same coil has Multiple groups of outgoing wires, so in addition to the tested coil outgoing wires, the rest of the coil outgoing wires must also be short-circuited, which results in the need to short-circuit the outgoing wires of other coils when testing one group of coils outgoing wires, and when testing the outgoing wires of another group of coils. , it is necessary to short-circuit the outgoing wires of the upper group of coils, and this group of test coils is disconnected and then connected to the experimental instrument. The problem of repeated wiring occurs, which greatly affects the test efficiency.

Utility model content

The purpose of the utility model is to provide a CT coil test device without repeated wiring, which is used to solve the problem of repeated wiring in the current test process.

In order to achieve the above object, the utility model adopts the following technical scheme: a device for CT coil test, the device includes at least one unit for connecting the secondary winding of the CT coil and the experimental instrument, and each unit includes at least one pair for connecting A pair of connecting parts of the secondary winding of the CT coil and a switch corresponding to the pair of connecting parts, and each pair of connecting parts is connected in parallel with its corresponding switch.

Each unit is connected in parallel with a pair of access ports for accessing experimental instruments corresponding to each pair of wiring members.

The connecting piece is an electrician's clip.

The switch is a normally closed switch.

The beneficial effects of the utility model are: the utility model adopts a switch to control the short circuit and disconnection of the tested CT coil outgoing line, after the test coil is connected, only need to control the switch of the group when testing that group, without Repeated wiring is required, which improves the efficiency of the experiment.

Description of drawings

Fig. 1 is the schematic diagram of the utility model.

Detailed ways

In conjunction with Fig. 1, the device for testing the CT coil is described. The device includes seven units 1 for connecting the secondary winding of the CT coil and the experimental instrument. Each unit 1 includes two pairs of electrical clips 2, and two pairs of electrical clips 2 correspond to For the access terminal 4 and a normally closed switch 3 corresponding to each pair of electrician clips 2 , each pair of electrician clips 2 is connected in parallel with its corresponding pair of access terminals 4 and the normally closed switch 3 .

During the test, firstly connect the outgoing wires of the coils to be tested with electrician clips 2 in turn, and when testing a group of coil outgoing wires of one of the CT coils, open the normally closed switch knife 3 corresponding to the outgoing wires of the group of coils, and turn off the test instrument 5. Connect the access terminal 4 corresponding to the outgoing line of this group of coils. When testing another group of coils, close the normally closed knife switch 3 of the previous group, open the normally closed knife switch of this group, and connect the experimental instrument 5 This group of coils can be connected to the corresponding access terminals, and the same method can be used for other CT coils in the same way.

Claims (4)

1. A device for CT coil testing, characterized in that: the device comprises at least one unit for connecting the secondary winding of the CT coil and the experimental instrument, and each unit comprises at least one pair of secondary windings for connecting the CT coil Each pair of wiring elements and a switch corresponding to the pair of wiring elements are connected in parallel. 2. The device for CT coil testing according to claim 1, characterized in that: each unit is connected in parallel with a pair of connection terminals for connecting to experimental instruments corresponding to each pair of wiring members. 3. The CT coil testing device according to claim 1 or 2, characterized in that: said connecting piece is an electrician's clip. 4. The CT coil testing device according to claim 3, characterized in that: said switch is a normally closed switch.

Images