CN208257172U - For connecting the earthing resistance cabinet of outdoor transformer neutral point - Google Patents

Abstract

The utility model provides a kind of for connecting the earthing resistance cabinet of outdoor transformer neutral point, including cabinet body, the side of the cabinet body is equipped with cabinet door, disconnecting switch is installed in the cabinet body, insulator, grounding resistor, current transformer, electric current relay, the time relay and terminal block, one end of the neutral point connection disconnecting switch of the grounding transformer, one end of the other end connecting insulator of the disconnecting switch, the input terminal of the other end connection grounding resistor of insulator, the input terminal of the output end connection current transformer of the grounding resistor, the input terminal of the output end connection electric current relay of the current transformer, the input terminal of the output end Connection Time relay of the electric current relay, the output end connection terminal of the time relay is arranged.The utility model is structurally reasonable, is easy to use.

Description

For connecting the earthing resistance cabinet of outdoor transformer neutral point

Technical field

The utility model relates to transformer technology fields, and in particular to a kind of for connecting connecing for outdoor transformer neutral point Ground resistance cabinet.

Background technique

Neutral Grounding through Resistance in Electrical mode is since the nineties in century at home each big-and-middle urban applications, at present in power train The industries such as system, steel, petrochemical industry and subway are used widely, especially in Fujian oil refining, Zhenghai refinery, Huizhou oil refining, Shanghai It is widely applied in the domestic great Petrochemical Projects such as match section and Sichuan ethylene.It is proved by the operating experience of more than ten years, neutral point warp Resistance earthing has good in terms of the various transient overvoltages of limitation system and realization quick and precisely select ground fault Effect.With continuous reinforcement, the increasingly raising of cable degree of distribution net work structure, the application of Neutral Grounding through Resistance in Electrical mode Will be more and more extensive, it has been increasingly becoming the main way of the industries power network neutral point such as China's electric power, steel, petrochemical industry ground connection.

Transformer neutral point earthing resistance cabinet inlet wire in the prior art is chaotic, it has not been convenient to operate, and impact resistance Not enough.

Summary of the invention

In order to solve the deficiencies in the prior art, the utility model provides a kind of for connecting outdoor transformer neutrality The earthing resistance cabinet of point, it is structurally reasonable, it is easy to use.

It is a kind of for connecting the ground resistance of outdoor transformer neutral point according to technical solution provided by the utility model Cabinet, including cabinet body, the side of the cabinet body are equipped with cabinet door, disconnecting switch, insulator, ground resistance are equipped in the cabinet body The neutral point connection of device, current transformer, electric current relay, the time relay and terminal block, the grounding transformer is kept apart One end of pass, one end of the other end connecting insulator of the disconnecting switch, the other end connection grounding resistor of insulator Input terminal, the input terminal of the output end connection current transformer of the grounding resistor, the output end of the current transformer connect Connect the input terminal of electric current relay, the input terminal of the output end Connection Time relay of the electric current relay, the time after The output end connection terminal of electric appliance is arranged.

Further, the insulator is also connected with arrester.

Further, the current transformer ground connection.

Further, the disconnecting switch passes through pyrocondensation copper bar connecting insulator.

Further, the cabinet body top is equipped with rain-proof eaves, and the rain-proof eaves are equipped with hanging ring.

Further, detachable lighting lamp is installed in the cabinet door.

Further, observation window is offered in the cabinet door.

Further, operating room, the time relay, electric current relay and intermediate relay peace are equipped in the cabinet body In the operating room, time door is offered in the cabinet door of the operating room side.

Further, miniature circuit breaker, temperature and humidity controller, digital display ammeter and voltage are also equipped in the operating room Terminal.

Further, the cabinet body includes the double-deck cold plate being formed as one, and is equipped with thermal insulation layer between the cold plate.

From described above as can be seen that provided by the utility model for connecting the ground resistance of outdoor transformer neutral point Cabinet has following advantages compared with prior art: the utility model has stronger thermal stability, anti-corrosion capability, shock resistance energy Power, machine capability, and wire structures are reasonable, are easy to use.

Detailed description of the invention

Fig. 1 is the schematic diagram of internal structure of the utility model cabinet body.

Fig. 2 is the main view of the utility model.

Fig. 3 is the electrical connection schematic diagram of the utility model.

1. cabinet body, 2. cabinet doors, 3. disconnecting switch, 4. insulators, 5. grounding resistors, 6. current transformers, 7. electric currents after Electric appliance, 8. time relays, 9. terminal blocks, 10. arresters, 11. pyrocondensation copper bars, 12. rain-proof eaves, 13. hanging rings, 14. is removable Unload headlamp, 15. observation windows, 16. operating rooms, 17. miniature circuit breakers, 18. temperature and humidity controllers, 19. digital display ammeters, 20. Axial flow blower, 21. intermediate relays, 22. heating plates, 23. cable anchor ears.

Specific embodiment

For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and Referring to attached drawing, the utility model is further described.Wherein identical components are presented with like reference characters.It needs Illustrate, word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to the side in attached drawing To.The word "inner" used and "outside" refer respectively to the direction towards or away from geometric center of specific component.

It is a kind of for connecting the earthing resistance cabinet of outdoor transformer neutral point, including cabinet body 1, the cabinet as shown in Fig. 1 ~ 3 The side of body 1 is equipped with cabinet door 2, and 1 top of cabinet body is equipped with rain-proof eaves 12, and the rain-proof eaves 12 are equipped with hanging ring 13, preferably 5 ° of the gradient of rain-proof eaves 12.The cabinet body 1 is formed by the double-deck cold plate integral solder, between the cold plate be equipped with every Thermosphere, the preferred heat insulation foam of thermal insulation layer.The preferred 2mm of the thickness of the cold plate.So that the anticorrosion energy of the resistor box Power, impact resistance, machine capability, stability greatly improve.

The current transformer 6, which is grounded in the cabinet body 1, is equipped with grounding transformer, disconnecting switch 3, insulator 4, ground connection The neutral point of resistor 5, current transformer 6,7 time relay 8 of electric current relay and terminal block 9, the grounding transformer is logical One end of cable electrical connection disconnecting switch 3 is crossed, the other end of the disconnecting switch 3 passes through 11 connecting insulator 4 of pyrocondensation copper bar One end, the other end of insulator 4 connect the input terminal of grounding resistor 5 by copper bar, and the output end of the grounding resistor 5 is logical The input terminal of copper bar electrical connection current transformer 6 is crossed, the output end of the current transformer 6 is electrically connected by wires electric current relay The output end of the input terminal of device 7, the electric current relay 7 is electrically connected by wires the input terminal of the time relay 8, the time The output end of relay 8 is electrically connected by wires terminal block 9, and the insulator 4 also connects arrester 10, the electricity by copper bar Current transformer 6 is grounded.The electric wire and cable is arranged together by cable anchor ear 23.

In order to improve the thermal stability of the resistor box, it is also equipped with heating plate 22 in the cabinet body 1, so that the resistance Cabinet can resist low temperature environment, and 1 top of cabinet body is equipped with axial flow blower 20, increases the heat-sinking capability of the resistor box.

Detachable lighting lamp 14 and observation window 15 are installed, the detachable lighting lamp 14 can be convenient in the cabinet door 2 Staff operates the resistor box at night or bad light.

Operating room 16 is equipped in the cabinet body 1, the time relay 8, electric current relay 7 and intermediate relay 21 are installed In the operating room 16, time door is offered in the cabinet door 2 of 16 side of operating room, is also equipped in the operating room 16 micro- Type breaker 17, temperature and humidity controller 18 and digital display ammeter 19, the temperature and humidity controller 18 and heating plate 22 and axis stream wind Machine 20 connects, and heating plate 22 can be controlled according to the real time temperature in the resistor box or axial flow blower 20 works.

It should be understood by those ordinary skilled in the art that: the foregoing is merely specific embodiment of the utility model and , it is not intended to limit the utility model, all any modifications within the purport of the utility model, made, change equivalent replacement Into etc., it should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that including cabinet body (1), the cabinet The side of body (1) is equipped with cabinet door (2), and disconnecting switch (3), insulator (4), grounding resistor are equipped in the cabinet body (1) (5), the neutral point of current transformer (6), electric current relay (7), the time relay (8) and terminal block (9), grounding transformer connects Connect one end of disconnecting switch (3), one end of the other end connecting insulator (4) of the disconnecting switch (3), insulator (4) it is another One end connects the input terminal of grounding resistor (5), and the output end of the grounding resistor (5) connects the defeated of current transformer (6) Enter end, the input terminal of secondary output end connection electric current relay (7) of the current transformer (6), the electric current relay (7) Output end Connection Time relay (8) input terminal, the output end connection terminal of the time relay (8) arranges (9).

2. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that described exhausted Edge (4) is also connected with arrester (10).

3. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that the electricity Current transformer (6) ground connection.

4. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that it is described every It leaves pass (3) and passes through pyrocondensation copper bar (11) connecting insulator (4).

5. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that the cabinet Body (1) top is equipped with rain-proof eaves (12), and the rain-proof eaves (12) are equipped with hanging ring (13).

6. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that the cabinet Detachable lighting lamp (14) are installed on door (2).

7. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that the cabinet Observation window (15) are offered on door (2).

8. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that the cabinet Operating room (16) are equipped in body (1), the time relay (8), electric current relay (7) and intermediate relay (21) are mounted on institute It states in operating room (16), time door is offered in the cabinet door (2) of operating room (16) side.

9. as claimed in claim 8 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that the work Make to be also equipped with miniature circuit breaker (17), temperature and humidity controller (18) and digital display ammeter (19) in room (16).

10. as described in claim 1 for connecting the earthing resistance cabinet of outdoor transformer neutral point, which is characterized in that described Cabinet body (1) includes the double-deck cold plate being formed as one, and is equipped with thermal insulation layer between the cold plate.