CN211478609U

CN211478609U - Power supply switching device for single-phase short circuit test of transformer

Info

Publication number: CN211478609U
Application number: CN201922298094.6U
Authority: CN
Inventors: 陈梁远; 赵坚; 余长厅; 张玉波; 张磊
Original assignee: Electric Power Research Institute of Guangxi Power Grid Co Ltd
Current assignee: Electric Power Research Institute of Guangxi Power Grid Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-11
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a single-phase short circuit test power switching device of transformer, including ac contactor, the guide rail, the wire, binding post, panel and plastics case, the bottom at the plastics case is fixed to the guide rail, ac contactor's quantity is 3, install on the guide rail, the panel is fixed and covers the upper portion at the plastics case, binding post installs on the panel, binding post is incoming wire terminal and the leading-out terminal of being located ac contactor's both sides, ac contactor and binding post are connected to the wire, every incoming wire terminal is connected with 3 ac contactor through the wire respectively, every leading-out terminal is connected with 2 ac contactor through the wire respectively. The utility model is provided with the AC contactor and the wiring terminal, and can realize the switching of the test circuit through the operation of the AC contactor after only once wiring of the wiring terminal, and the operation is convenient and safe; the utility model discloses convenient operation has improved work efficiency, and is safe in utilization moreover, has ensured equipment and operating personnel's safety.

Description

Power supply switching device for single-phase short circuit test of transformer

Technical Field

The utility model relates to a transformer test technical field especially relates to a single-phase short circuit test power switching device of transformer.

Background

The transformer is the key equipment of electric wire netting, and the purpose of transformer short circuit test is exactly survey the short-circuit loss and the short-circuit voltage of transformer, and its effect is: calculating the efficiency of the transformer; determining whether the transformer can be operated in parallel with other transformers; calculating short-circuit current when the transformer is in short circuit; calculating the voltage fluctuation of the secondary side of the transformer; determining the temperature rise of the transformer in the temperature rise test; the transformer is found to be defective in structure and manufacture. The short-circuit characteristic test is a test in which the winding on one side of the transformer is short-circuited and an ac voltage of a rated frequency is applied from the other side. For the short-circuit test of a single-phase transformer or due to the limitation of a field or an instrument, the short-circuit test of a three-phase transformer can only be carried out by adopting a single-phase power supply, the method adopted at present is realized by frequently replacing a wiring, on one hand, the working efficiency is influenced, on the other hand, a wiring terminal is easy to damage, poor contact is caused, overheating is caused, and in addition, misoperation easily causes electric shock risk.

SUMMERY OF THE UTILITY MODEL

Not enough more than, the utility model provides a single-phase short circuit test power switching device of transformer can be convenient for the short circuit test of transformer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a power supply switching device for a single-phase short-circuit test of a transformer comprises an alternating current contactor, a guide rail, a lead, a wiring terminal, a panel and a plastic box, the guide rail is fixed at the bottom of the plastic box, the number of the alternating current contactors is 3, the alternating current contactors are arranged on the guide rail, the panel is fixed and covered on the upper part of the plastic box, the wiring terminal is arranged on the panel, the number of the connecting terminals is 5, the connecting terminals comprise 2 incoming line terminals and 3 outgoing line terminals, the incoming line terminals and the outgoing line terminals are respectively positioned at two sides of the alternating current contactor, the wire is connected alternating current contactor with binding post, every incoming line terminal respectively through wire and 3 alternating current contactor is connected, every terminal outgoing lines respectively through wire and 2 alternating current contactor is connected, and every alternating current contactor all is connected with 2 terminal outgoing lines.

Further, the plastic box comprises a box body and a box cover, one side of the box body is hinged to one side of the box cover, the other side of the box body is connected with the other side of the box cover through a lock catch, and internal devices can be effectively protected through the arrangement of the box cover.

Furthermore, the plastic box is made of ABS engineering plastic, and the ABS engineering plastic not only has the excellent heat resistance, weather resistance, dimensional stability and impact resistance of PC resin, but also has the excellent processing fluidity of the ABS resin.

The utility model has the advantages that:

1. the alternating current contactor and the wiring terminal are arranged, so that the test circuit can be switched by operating the alternating current contactor after the wiring of the wiring terminal is performed for one time, and the operation is convenient and safe;

2. the panel and the plastic box are arranged, so that the personal safety of operators and the safety of internal components can be protected;

3. the utility model discloses convenient operation has improved work efficiency, and is safe in utilization moreover, has ensured equipment and operating personnel's safety.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic diagram of an embodiment of the present invention.

Wherein the labels shown in the figures are: 1: ac contactor, 2: guide rail, 3: wire, 4: terminal, 5: panel, 6: plastic box, 61: a case, 62: case lid, 7: ac power supply line, 8: and testing a lead.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a single-phase short circuit test power switching device of transformer which characterized in that: the device comprises an alternating current contactor 1, a guide rail 2, a lead 3, a wiring terminal 4, a panel 5 and a plastic box 6. The plastic box 6 comprises a box body 61 and a box cover 62, one side of the box body 61 is hinged with one side of the box cover 62, the other side of the box body 61 is connected with the other side of the box cover 62 through a lock catch, and the plastic box 6 is made of ABS engineering plastic. The guide rail 2 is fixed at the bottom of the box body 61 of the plastic box 6, and the number of the alternating current contactors 1 is 3, and the alternating current contactors are installed on the guide rail 2. The panel 5 is fixed to and covers the upper part of the case 61 of the case 6, and the panel 5 is provided with a hole corresponding to the handle of the ac contactor 1. Binding post 4 installs on panel 5, binding post 4's quantity is 5, including 2 incoming wire terminals and 3 leading-out terminals, incoming wire terminal and leading-out terminal are located AC contactor 1's both sides respectively, and AC contactor 1 and binding post 4 are connected to wire 3, and every incoming wire terminal is connected with 3 AC contactor 1 through wire 3 respectively, and every leading-out terminal is connected with 2 AC contactor 1 through wire 3 respectively, and every AC contactor 1 all is connected with 2 leading-out terminals.

When the device is used, referring to fig. 2, an alternating current power line 7 under the power failure condition is connected into 2 wiring terminals 4 of an incoming line, the wiring terminals of a three-phase bushing at the high-voltage side of a transformer are connected with the wiring terminals 4 of 3 outgoing lines through test leads 8, the handle of an alternating current contactor 1 is checked and ensured to be arranged at an OFF position, a power supply of a 220V alternating current power line 7 is switched ON, the handle of the alternating current contactor 1 is sequentially arranged at an ON position, the voltage and the current of the power-ON test leads 8 are measured, and the short-circuit impedance and the short-circuit loss of the transformer under the low voltage can. The utility model discloses convenient operation has improved work efficiency, and is safe in utilization moreover, has ensured equipment and operating personnel's safety.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a single-phase short circuit test power switching device of transformer which characterized in that: including ac contactor (1), guide rail (2), wire (3), binding post (4), panel (5) and plastics case (6), guide rail (2) are fixed the bottom of plastics case (6), the quantity of ac contactor (1) is 3, installs on guide rail (2), panel (5) are fixed and cover the upper portion of plastics case (6), binding post (4) are installed on panel (5), the quantity of binding post (4) is 5, including 2 incoming wire terminals and 3 leading-out terminals, incoming wire terminal and leading-out terminal are located respectively the both sides of ac contactor (1), wire (3) are connected ac contactor (1) with binding post (4), every incoming wire terminal respectively through wire (3) with 3 ac contactor (1) is connected, each outlet terminal is respectively connected with 2 alternating current contactors (1) through a lead (3), and each alternating current contactor (1) is connected with 2 outlet terminals.

2. The power switching device for the single-phase short circuit test of the transformer according to claim 1, wherein: the plastic box (6) comprises a box body (61) and a box cover (62), wherein one side of the box body (61) is hinged to one side of the box cover (62), and the other side of the box body is connected with the other side of the box cover through a lock catch.

3. The power switching device for the single-phase short circuit test of the transformer according to claim 1, wherein: the plastic box (6) is made of ABS engineering plastic.