CN211239064U

CN211239064U - Voltage transformer cabinet

Info

Publication number: CN211239064U
Application number: CN201922031997.8U
Authority: CN
Inventors: 刘春富
Original assignee: Tianjin Baitong Electric Power Technology Development Co ltd
Current assignee: Tianjin Baitong Electric Power Technology Development Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-08-11
Anticipated expiration: 2029-11-22

Abstract

The utility model relates to a high voltage distribution equipment field discloses a voltage transformer cabinet, the utility model aims to provide a voltage transformer cabinet, including voltage transformer, voltage transformer ' S low pressure end links to each other with the PT car, the PT car includes a control circuit, PT car control circuit includes PT car test position branch road, PT car operating position branch road, PT car test position branch road is equipped with a normally closed switch S8 and series connection ' S pilot lamp HW1, PT car operating position branch road is equipped with a normally open switch S9 and series connection ' S pilot lamp HW 2. The utility model discloses the distribution is simple, and the few function of structure is many, has realized measurement, protection, illumination, control by temperature change multiple function, is equipped with multiple protection device in each structure, and during circuit failure, the loss is reduced, guarantees personnel's safety.

Description

Voltage transformer cabinet

Technical Field

The utility model relates to a high-voltage distribution equipment field, concretely relates to voltage transformer cabinet.

Background

With the increasing population base of China, in order to meet the needs of industries and users, a smart grid is also developing at a high speed, a voltage transformer cabinet is one of indispensable devices in a high-voltage distribution system, in the prior art, the voltage transformer cabinet is provided with a voltage transformer, a circuit breaker, a handcart and the like, and the handcart can be drawn out when a circuit fails, so that the handcart can be conveniently maintained by personnel.

However, the existing voltage transformer cabinet still has the defects of few functions and insufficient protection measures.

SUMMERY OF THE UTILITY MODEL

An it is not enough to prior art existence, the utility model aims to provide a voltage transformer cabinet, including voltage transformer, voltage transformer's low pressure end links to each other with the PT car, the PT car includes a control circuit, PT car control circuit includes PT car test position branch road, PT car operating position branch road, PT car test position branch road is equipped with a normally closed switch and series connection's pilot lamp, PT car operating position branch road is equipped with a normally open switch and series connection's pilot lamp.

The high-voltage end of the voltage transformer is connected with the fuse, the voltage transformer is protected, the fuse is connected with an arrester, the other end of the arrester is grounded, and the fuse and the arrester share one group of PT vehicles.

Further, the PT vehicle is connected to the voltage bus through a power line, and a voltage meter is connected with the power line and used for measuring the circuit voltage.

The voltage transformer cabinet further comprises an illumination temperature control module, the illumination temperature control module comprises an illumination unit and a temperature control unit, the illumination unit is divided into an instrument room illumination branch and a cable room illumination branch, and the temperature control unit is provided with a temperature and humidity controller.

Furthermore,

terminals

1 and 2 of the temperature and humidity controller are connected with a temperature sensor, terminals 3 and 4 are respectively connected with a heater,

terminals

5 and 6 are respectively connected with a small bus to supply power to the temperature and humidity controller, and

terminals

7 and 8 are connected with a humidity sensor.

The voltage transformer cabinet also comprises the comprehensive protection device, and the comprehensive protection device is connected with the signal screen and comprises a device fault warning branch, a PT disconnection branch, a system low-voltage branch, a system grounding branch, a system overvoltage branch and a device power-off branch.

Furthermore, the protection fault warning branch, the PT disconnection branch, the system low-voltage branch, the system grounding branch and the system overvoltage branch are all provided with normally open switches to control and realize the functions of the branches, and the device power-off branch is provided with a switch.

Compared with the prior art, the beneficial effects of the utility model are that: the distribution is simple, and the structure is few, and the function is many, and this voltage transformer cabinet has realized measuring, protection, illumination, control by temperature change multiple function, is equipped with multiple protection device in each structure, and during circuit failure, the loss is reduced, guarantees personnel's safety.

Drawings

Fig. 1 is a diagram of PT ac voltage wiring.

Fig. 2 is a schematic view of the connection mode of the lightning rod.

FIG. 3 is a wiring diagram of the control loop of the PT vehicle.

Fig. 4 is a wiring diagram of an illumination temperature control module.

Fig. 5 is a wiring diagram of the integrated protection device.

Detailed Description

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

As shown in figure 1, a voltage transformer cabinet, including a voltage transformer PT, voltage transformer PT's high-voltage terminal links to each other with fuse FU, realize the protection to voltage transformer PT, voltage transformer PT's low-voltage terminal links to each other with the PT car, the PT car is controlled by PT car control loop, the PT car is connected to voltage bus 1 through a power transmission line on, voltage transformer PT transforms high-voltage into low-voltage according to the proportion to connect voltage instrument, voltage instrument links to each other with the power transmission line, be used for realizing the measurement to the PT voltage.

As shown in fig. 2, the lightning rod connection mode schematic diagram, arrester one end ground connection other end links to each other with fuse FU, and fuse FU and arrester share a set of PT car, and a PT car of operation can make voltage transformer PT and arrester all uncharged simultaneously, also can ensure personnel's safety when having reduced the wiring, convenient maintenance and experiment.

As shown in fig. 3, the PT vehicle control circuit includes a PT vehicle test position branch 5, a PT vehicle working position branch 6, a comprehensive protection power supply 7, and an instrument power supply 8, and a control bus 4 is used to provide power for the PT vehicle test position branch 5, the PT vehicle working position branch 6, the comprehensive protection power supply 7, and the instrument power supply 8, where the PT vehicle test position branch 6 is provided with a normally closed switch S8 and a serially connected indicator HW1, the PT vehicle working position branch is provided with a normally open switch S9 and a serially connected indicator HW2, and when the circuit is normal, the PT vehicle is in a test position, the indicator HW1 is on, the indicator HW2 is off, and if the circuit fails, the PT vehicle is taken out, and at this time, the normally closed switch S8 is off, 1, the normally open switch S9 is closed, the HW2 is on, and the PT vehicle is switched from the test position to a working position.

As shown in fig. 4, the lighting temperature control module includes a lighting unit and a temperature control unit, the lighting unit is divided into an instrument room lighting branch 10 and a cable room lighting branch 11, the instrument room lighting branch 10 includes a travel switch SQ and a lighting lamp EL1, the small bus 9 is used for providing a required power supply for the lighting temperature control module, and under the micro-motion of the transformer cabinet door, the travel switch SQ is closed, and the lighting lamp EL1 is used for lighting the instrument room. The cable chamber lighting branch 11 comprises a lighting lamp EL2, a normally open switch is arranged in the lighting lamp EL2, and when the normally open switch is pressed when needed, the lighting lamp EL2 is lighted to illuminate the cable chamber. The temperature control unit is provided with a temperature and humidity controller WK, the model is GQ-WSK-SG, the

terminals

1 and 2 of the temperature and humidity controller WK are connected with a temperature sensor 12, the terminals 3 and 4 are respectively connected with a heater EH1 and an EH2, the

terminals

5 and 6 are respectively connected with a small bus to supply power to the temperature and humidity controller, the

terminals

7 and 8 are connected with a humidity sensor 13, when the temperature sensor 12 or the humidity sensor 13 detects that the temperature is too low or the humidity is too high, the temperature and humidity controller WK controls the heater EH1 to work to heat a cable chamber, and the heater EH2 works to heat a switch chamber.

As shown in fig. 5, the wiring diagram of the integrated protection device is shown, the integrated protection device includes a device fault warning branch 14, a PT disconnection branch 15, a system low voltage branch 16, a system grounding branch 17, a system overvoltage branch 18, and a device power-off branch 19, the fault warning branch 14 is controlled by a switch TS1, the PT disconnection branch 15 is controlled by a switch TS2, the system low voltage branch 16 is controlled by a switch TS3, the system grounding branch 17 is controlled by a switch TS4, and is controlled by a switch TS5 through the voltage branch 18, the device power-off branch 19 is controlled by a normally closed switch AP, and the fault warning branch 14, the PT disconnection branch 15, the system low voltage branch 16, the system grounding branch 17, the system overvoltage branch 18, and the device power-off branch 19 are connected to a signal panel to receive relevant signals of the device.

The utility model provides a voltage transformer cabinet, including a voltage transformer PT, illumination temperature control module, integrated protection device, voltage transformer PT's high-pressure side links to each other with fuse FU, voltage transformer PT's low-voltage side links to each other with the PT car, the PT car is by PT car control loop control, illumination module includes lighting unit and temperature control unit, lighting unit passes through light EL2, light EL2 comes for instrument room and cable chamber illumination, the temperature control unit comes from the regulation temperature through atmospheric control ware WK, integrated protection device is equipped with trouble and reports to the police branch road 14, PT broken string branch road 15, system low-voltage branch road 16, system ground connection branch road 17, system overvoltage branch road 18, device electricity loss branch road 19, can effectively provide the protection when circuit fault. The utility model discloses the distribution is simple, and the few function of structure is many, has realized measurement, protection, illumination, control by temperature change multiple function, is equipped with multiple protection device in each structure, and during circuit failure, the loss is reduced, guarantees personnel's safety.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. The utility model provides a voltage transformer cabinet, its characterized in that, includes a voltage transformer PT, voltage transformer PT ' S low pressure end links to each other with the PT car, the PT car includes PT car control circuit, PT car control circuit includes PT car experimental position branch road (5), PT car operating position branch road (6), PT car experimental position branch road (5) are equipped with a normally closed switch S8 and series connection ' S pilot lamp HW1, PT car operating position branch road (6) are equipped with a normally open switch S9 and series connection ' S pilot lamp HW 2.

2. The voltage transformer cabinet according to claim 1, wherein the high voltage terminal of the voltage transformer PT is connected to a fuse FU to protect the voltage transformer PT.

3. A voltage transformer cabinet according to claim 1, characterized in that the PT vehicle is connected to the voltage bus (1) by a power line, and there are voltage meters connected to the power line for measuring the circuit voltage.

4. The voltage transformer cabinet according to claim 1, further comprising an illumination temperature control module and a comprehensive protection device.

5. The voltage transformer cabinet as claimed in claim 2, wherein a lightning arrester is connected to the fuse FU, the other end of the lightning arrester is grounded, and the fuse and the lightning arrester share a set of PT cars.

6. The voltage transformer cabinet as claimed in claim 4, wherein the lighting and temperature control module comprises a lighting unit and a temperature control unit, the lighting unit is divided into an instrument room lighting (10) branch and a cable room lighting (11) branch, the temperature control unit is provided with a temperature and humidity controller WK, terminals 1 and 2 of the temperature and humidity controller WK are connected with a temperature sensor (12), terminals 3 and 4 are respectively connected with a heater EH1, an EH2, terminals 5 and 6 are respectively connected with a small bus to supply power to the temperature and humidity controller WK, and terminals 7 and 8 are connected with a humidity sensor (13).

7. A voltage transformer cabinet according to claim 4, characterized by comprising a comprehensive protection device connected with the signal screen, comprising a device fault warning branch (14), a PT disconnection branch (15), a system low voltage branch (16), a system grounding branch (17), a system overvoltage branch (18) and a device power-off branch (19).