CN221039277U - Auxiliary junction box for integrated transformer test - Google Patents

Abstract

The utility model discloses an integrated transformer test auxiliary junction box, which belongs to the field of transformer tests and comprises a high-voltage winding, a medium-voltage winding, a low-voltage winding, contactors, a balance winding, a PLC (programmable logic controller) integrated machine and a remote control feedback controller, wherein the number of the contactors is multiple, the high-voltage winding is connected with the PLC integrated machine through a contactor I and a contactor II, the medium-voltage winding is connected with the PLC integrated machine through a contactor III and a contactor IV, the low-voltage winding is connected with the PLC integrated machine through a contactor five and a contactor six, the balance winding is connected with the PLC integrated machine through a contactor seven and a contactor eight, and the PLC integrated machine is connected with the remote control feedback controller and a plurality of manual switches; the utility model provides an integrated transformer test auxiliary junction box which can be used for rapidly detecting various performances of a transformer, and is very simple in detection method, high in accuracy and suitable for being applied to actual production detection.

Description

Auxiliary junction box for integrated transformer test

Technical Field

The utility model relates to the field of transformer tests, in particular to an integrated auxiliary junction box for transformer tests.

Background

In an electrical power system, one of the most important types of electrical power equipment is a power transformer. The main method for ensuring the safe operation of the transformer is to perform an electrical test on the power transformer. In the actual test process of the site, as the height of the transformer of 35kV and above is more than 1.5 meters, test personnel are required to climb up the transformer to carry out test wiring after tying the safety belt. In the test process, due to the difference of test items and test parts, frequent wire change is needed, firstly, the wire connection time is far longer than the test time, and secondly, the wire connection personnel need to wait on the transformer for a long time, so that certain potential safety hazards exist. In addition, due to safety consideration, a tester is required to climb down the transformer to wait when certain high-voltage tests are carried out, and climb up the transformer to change the line after the tests are finished, so that the efficiency of the tests is further reduced. When the current junction box is used for testing the direct current resistance of each test connector, the single wiring, short circuit, grounding and other wiring modes of the transformer can be manually switched, and the working efficiency is low.

Disclosure of utility model

The utility model aims to provide an integrated transformer test auxiliary junction box so as to solve the problems of low working efficiency, high potential safety hazard and the like in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides an experimental auxiliary junction box of integrated transformer, comprises parts such as high-voltage winding, medium voltage winding, low voltage winding, contactor, balance winding, PLC all-in-one and remote control feedback controller, the contactor has a plurality ofly, and the high voltage winding passes through contactor one and contactor two and connects the PLC all-in-one, and medium voltage winding passes through contactor three and contactor four and connect the PLC all-in-one, and the low voltage winding passes through contactor five and contactor six and connects the PLC all-in-one, and the flat voltage winding passes through contactor seven and contactor eight and connects the PLC all-in-one, is connected with remote control feedback controller and a plurality of manual switch on the PLC all-in-one, still is connected with display panel on the PLC all-in-one. The PLC all-in-one machine is powered by 24V direct current. The contactor is also connected to the output terminal through a voltage loop and a current loop.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides an integrated transformer test auxiliary junction box. The method can be used for rapidly detecting various performances of the transformer, is very simple, has high accuracy, has two control modes of manual operation and remote control, and is suitable for being applied to actual production detection.

Drawings

Fig. 1 is a schematic diagram of an integrated transformer test auxiliary junction box.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, an auxiliary junction box for an integrated transformer test comprises a plurality of high-voltage windings, a plurality of medium-voltage windings, a plurality of low-voltage windings, a plurality of contactors, a plurality of balance windings, a plurality of PLC (programmable logic controller) integrated machines, wherein the high-voltage windings are connected with the PLC integrated machines through a plurality of first contactors and a plurality of second contactors, the medium-voltage windings are connected with the PLC integrated machines through a plurality of third contactors and a plurality of fourth contactors, the low-voltage windings are connected with the PLC integrated machines through a plurality of fifth contactors and a plurality of sixth contactors, the flat-voltage windings are connected with the PLC integrated machines through a plurality of seventh contactors and a plurality of eighth contactors, and the PLC integrated machines are connected with the remote control feedback controller and a plurality of manual switches. And a display panel is also connected to the PLC all-in-one machine. The PLC all-in-one machine is powered by 24V direct current. The contactor is also connected to the output terminal through a voltage loop and a current loop.

The working principle is as follows:

1. The winding sides of the transformer are connected to corresponding wiring terminals of a junction box, a measuring instrument is connected to an output end, the junction box keeps a shell grounded during operation, a power supply is turned on, and a power switch is turned on:

2. Direct current resistance test:

Pressing a manual key or a remote control switch corresponding to the direct-resistance high voltage can switch to a direct-current resistance mode of the high-voltage winding, a corresponding indicator lamp is on, at the moment, the first contactor and the second contactor are closed, a voltage loop and a current loop of the high-voltage winding are communicated with an output end, and other sides are suspended; the other side direct current resistance test methods are the same;

3. short circuit impedance test:

Pressing a manual key or a remote control switch corresponding to high-medium impedance, switching to a high-medium voltage short circuit impedance test mode, and turning on corresponding indicator lamps, wherein the contactor I, the contactor II and the contactor IV are closed at the moment, a high-voltage winding voltage loop and a current loop are connected with an output end, a medium-voltage winding is short-circuited, and other sides are suspended; the other side short-circuit impedance test methods are the same;

4. On-load tap testing:

Pressing the corresponding manual key or remote control switch of the on-load, switching to an on-load tapping test mode, and lighting corresponding indicator lamps, wherein the contactor I, the contactor IV and the contactor seven are closed with the contactor I, the high-voltage winding current loop is communicated with the output end, and other windings are short-circuited;

5. Transformation ratio test:

Pressing a manual key or a remote control switch corresponding to the transformation ratio high-medium, switching to a high-medium voltage transformation ratio test mode, and turning on a corresponding indicator lamp, wherein the first contactor and the fifth contactor are closed at the moment, an output end current loop is connected with a main winding of the transformation ratio tester, an output end current loop is connected with an auxiliary winding of the transformation ratio tester, and other sides are suspended; the other side short-circuit impedance test methods are the same;

6. Resetting:

Pressing a reset key, entering a reset mode after 2 seconds, and disconnecting all contactors of the junction box;

7. notice that:

The voltage-current loop should be wired according to the specification and must not be connected reversely (thick line is current, thin line is voltage);

When the test is carried out or before discharging, the test mode cannot be converted, the voltage and current loops are automatically detected, a self-locking state is achieved in the test, and the key and remote control operation are invalid;

The remote controller has 433Mhz communication frequency and communication distance of >2km, when the remote controller is pressed down, a red indicator light is on, when the junction box acts correctly, the green indicator on the remote controller flashes, otherwise, the feedback signal is absent.

The utility model provides an integrated transformer test auxiliary junction box. The method can be used for rapidly detecting various performances of the transformer, is very simple, has high accuracy, has two control modes of manual operation and remote control, and is suitable for being applied to actual production detection.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (5)

1. The utility model provides an experimental auxiliary connection box of integrated transformer, includes high-voltage winding, well voltage winding, low-voltage winding, contactor, balance winding, PLC all-in-one and remote control feedback controller, its characterized in that, the high-voltage winding is connected the PLC all-in-one through contactor one and contactor two, and well voltage winding connects the PLC all-in-one through contactor three and contactor four, and the low-voltage winding connects the PLC all-in-one through contactor five and contactor six, and the flat voltage winding connects the PLC all-in-one through contactor seven and contactor eight, is connected with remote control feedback controller and a plurality of manual switch on the PLC all-in-one.

2. The auxiliary junction box for integrated transformer test according to claim 1, wherein the PLC integrated machine is further connected with a display panel.

3. The auxiliary junction box for integrated transformer testing according to claim 2, wherein said PLC integrated machine is powered by 24V dc power.

4. The auxiliary junction box for integrated transformer testing according to claim 1, wherein said contactor is further connected to the output terminal via a voltage loop and a current loop.

5. The integrated transformer test auxiliary junction box of claim 1, wherein said remote feedback controller employs 433Mhz communication frequency.