CN202994856U - General test cable used for transformer test - Google Patents

Abstract

The utility model discloses a general test cable used for a transformer test. The general test cable used for a transformer test solves the problem that when a transformer test is carried out by employing the technology of the prior art, corresponding connection cables need to be respectively connected onto the transformer, and therefore total time spent on the routine transformer test is prolonged. The general test cable used for a transformer test comprise a voltage test core wire (7), wherein a low voltage common insulating layer (6) is arranged outside the voltage test core wire (7), a shielding layer (5) arranged outside the low voltage common insulating layer (6), an electric current test wire layer (4) is arranged outside the shielding layer (5), a high voltage silica gel insulating layer (3) is arranged outside the electric current test wire layer (4), a second shielding layer (2) is arranged outside the high voltage silica gel insulating layer (3), and a second high voltage silica gel insulating layer (1) is arranged outside the second shielding layer (2). The general test cable used for a transformer test saves work time spent on the transformer test.

Description

Universal test cables for transformer testing

technical field

The utility model relates to a test cable used when testing a transformer of a high-voltage transmission line.

Background technique

Transformer routine test items mainly include: winding DC resistance; winding insulation resistance and absorption ratio or polarization index; winding tanδ and capacitance; capacitive bushing tanδ and capacitance. When conducting each test on the transformer, because the lead wires used by the instrument are not uniform, the staff needs to climb the transformer for each test, short-circuit, ground, and change the test wiring of the high, medium, and low-voltage windings. After changing the test wiring, the wiring personnel must be evacuated from the transformer. Therefore, each time the transformer is tested, the corresponding wiring cables need to be connected to the transformer respectively. extend.

Contents of the invention

The utility model provides a general test cable for transformer test, which solves the problem that in the prior art, when testing the transformer, the corresponding wiring cables need to be connected to the transformer respectively, which leads to the prolongation of the total time of the routine test of the transformer. .

The utility model solves the above problems through the following solutions:

A general-purpose test cable for transformer testing, including a voltage test core wire, a low-voltage common insulation layer outside the voltage test core wire, a shielding layer outside the low-voltage common insulation layer, and a current test wire outside the shielding layer A high-voltage silicone insulating layer is arranged outside the current test line layer, a second shielding layer is arranged outside the high-voltage silicone insulating layer, and a second high-voltage silicone insulating layer is arranged outside the second shielding layer.

A voltage test clamp is connected to the end of the voltage test core wire, a current test clamp is connected to the end of the current test line layer, and an alligator clip is connected to the end of the second shielding layer.

After fully considering the shielding, the utility model integrates all the test lines needed for the high-voltage test, and only needs the staff to climb twice, that is, once for wiring and once for dismantling, and the transformer can complete the routine test items of the transformer. It saves working time, improves work efficiency and reduces power outage time.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

A general-purpose test cable for transformer testing, including a voltage test core wire 7, a low-voltage ordinary insulating layer 6 is arranged outside the voltage test core wire 7, a shielding layer 5 is arranged outside the low-voltage ordinary insulating layer 6, and a shielding layer 5 is arranged outside the shielding layer 5 A current test line layer 4 is arranged outside, a high-voltage silicone insulating layer 3 is arranged outside the current test line layer 4, a second shielding layer 2 is arranged outside the high-voltage silicone insulating layer 3, and a second shielding layer 2 is arranged outside the second shielding layer 2 High voltage silicone insulation layer1.

A voltage test clamp is connected to the end of the voltage test core wire 7 , a current test clamp is connected to the end of the current test wire layer 4 , and an alligator clip is connected to the end of the second shielding layer 2 .

The outermost layer of the utility model is a high-voltage silicone insulating layer; the second layer is a shielding layer, which is used as a shielding ring connection during insulation testing; the third layer is a high-voltage silicone insulating layer; the fourth layer is a current test line layer, used for During the DC resistance test, current is applied to the transformer winding; the fifth layer is a low-voltage common insulation layer, and the innermost one is a voltage test core wire, which is used to collect the voltage drop on the transformer winding during the DC resistance test.

Description of the joints at both ends of the test line: one end of the test line is connected to the transformer bushing, and the other end of the test line is connected to the corresponding terminal of the junction box of the present invention.

The way to connect the lead wires to the transformer bushing is that the core wire of the innermost layer and the current test wire of the fourth layer are connected to the two jaws of a test pliers through the terminal of the test clamp, and the shielding layer of the second layer The wire is connected to an alligator clip, and if necessary, to the shielding end of the corresponding test object.

The lead wire method of one end connected to the junction box is: connect the second layer, the fourth layer, and the core wire to a plug respectively, corresponding to the shielding end, current end, and voltage end of the junction box.

During the transformer test, each bushing is connected with a special-purpose test line of the invention.

Claims (2)

1. universal test cable that is used for transformer test, comprise voltage tester heart yearn (7), it is characterized in that, be outside equipped with the common insulation course of low pressure (6) at voltage tester heart yearn (7), be outside equipped with screen layer (5) at the common insulation course of low pressure (6), be outside equipped with testing current line layer (4) at screen layer (5), be outside equipped with high pressure silicone insulation layer (3) at testing current line layer (4), be outside equipped with secondary shielding layer (2) at high pressure silicone insulation layer (3), be outside equipped with the second high pressure silicone insulation layer (1) at secondary shielding layer (2).

2. a kind of universal test cable for transformer test according to claim 1, it is characterized in that, be connected with the voltage tester pincers in the end of voltage tester heart yearn (7), be connected with the testing current pincers in the end of testing current line layer (4), be connected with crocodile clip in the end of secondary shielding layer (2).

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