CN201733107U

CN201733107U - Throw switch of low-voltage switch equipment

Info

Publication number: CN201733107U
Application number: CN2010202832052U
Authority: CN
Inventors: 张荣炳; 周建祥
Original assignee: WUHU MINGYUAN ELECTRICAL EQUIPMENT MANUFACTURE CO Ltd
Current assignee: Anhui Mingyuan Power Equipment Manufacture Ltd.
Priority date: 2010-07-30
Filing date: 2010-07-30
Publication date: 2011-02-02
Anticipated expiration: 2020-07-30

Abstract

The utility model discloses a throw switch of low-voltage switch equipment, which comprises a silicon controlled rectifier (9) and a hear radiator (8). An air cooling device (2) is arranged inside the throw switch. The throw switch is also provided with a temperature logic protective circuit. Through the above technical scheme, a ventilation passage is formed to facilitate heat radiation of the heat radiator. The forced air cooling device has good ventilation and heat radiation functions, so as to enable a thyristor to operate under the required temperature control and prolong the service life of the switch. The throw switch adopts a trigger circuit board with reliable triggering performance; and improves the utilization ratio of the space inside a cabinet and enlarges hear radiation area. The throw switch can be used as a capacitor bank throw switch with strong interchangeability.

Description

A kind of fling-cut switch of low voltage switchgear

Technical field

The utility model belongs to the technical field of electric power dispensing device, relates to the technology of low voltage switchgear, and more particularly, the utility model relates to a kind of fling-cut switch of low voltage switchgear.

Background technology

Below in conjunction with accompanying drawing the problem that prior art exists is analyzed:

Fig. 1 and Fig. 2 are thuristor throw-in and throw-off switch of the prior art.As shown in it, in the TSC of prior art low pressure dynamic compensation cabinet system, adopt thyristor 15, wherein install with mounting panel 11 as fling-cut switch.There is following defective in this fling-cut switch:

1, thyristor 15 is because of overheated generation thermal fatigue phenomenon, causes electric accidents such as the overvoltage of thyristor and overcurrent puncture, the single-phase generation overcurrent of inductor scaling loss;

2, also often because of the too high and out of service state of radiator 12 temperature, breakage and small opening appear to fling-cut switch in radiator 12;

3, resistance-capacitance protection 14 loops are installed on the strutting piece 13, far away from thyristor, the circuit redundancy, resonance with capacitor box easily takes place in the strutting piece 13 of resistance-capacitance protection 14 in the switching process, not only influence outward appearance, more reduced the useful life of components and parts, this has had a strong impact on the product quality of capacitor compensation cabinet;

4, trigger 16 is installed with on the one side with thyristor 15, and overall dimension is bigger, and signal disturbs big, takes up space, and separate unit cabinet design capacity is little, is not easy to install.

The utility model content

Problem to be solved in the utility model provides a kind of fling-cut switch of low voltage switchgear, its objective is the ventilation, the heat-sinking capability that improve fling-cut switch.

To achieve these goals, the technical scheme taked of the utility model is:

The fling-cut switch of low voltage switchgear provided by the utility model comprises controllable silicon, radiator, establishes air cooling equipment in the described fling-cut switch.

For making the utility model more perfect, more detailed and concrete technical scheme below also further having proposed to obtain best practical function, realizes goal of the invention better, has demonstrated fully novelty of the present utility model and creativeness:

Described fling-cut switch is established two U type mounting panels, and described U type mounting panel blocks the both sides at described radiator.

Described fling-cut switch also is provided with temperature virtual protection circuit, described temperature virtual protection circuit is established and is often driven temperature relay and normally closed temperature relay, describedly often drive temperature relay and normally closed temperature relay is located on the described radiator, describedly often open the power supply that temperature relay is connected described air cooling equipment; Described normally closed temperature relay is connected with the loop of described fling-cut switch.

Described fling-cut switch is established the zero-cross triggering circuit plate, and resistance-capacitance protection loop and the trigger on each thyristor in the described fling-cut switch are located on the described zero-cross triggering circuit plate.

Described zero-cross triggering circuit plate is located in the ventilator cowling.

Establish the secondary connection terminal on the described fling-cut switch, described fling-cut switch is connected with controller by described secondary connection terminal.

The utility model adopts technique scheme, forms vent passages, is convenient to radiator heat-dissipation; The air blast cooling device has good ventilation, heat sinking function, and the assurance thyristor is worked under the temperature control that requires, and improves the useful life of switch; Adopt the circuits for triggering plate, trigger dependable performance; Improve space availability ratio in the cabinet, enlarge area of dissipation; Capacitor group fling-cut switch with interchangeable performance, the exchange performance is strong, can do the independent drawers unit; Line clear, bright and clear in the cabinet, first and second wiring is succinct, easy for installation, dependable performance, easy access.Can be widely used in capacitor compensation cabinets such as GGD, GCS, MNS, GDM1A in the low pressure series.

Description of drawings

Below expressed content of each width of cloth accompanying drawing of this specification and the mark among the figure are made brief description:

Fig. 1 is a structural representation described in this specification background technology;

Fig. 2 is the side schematic view of structure shown in Figure 1;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is the stereogram of structure shown in Figure 3.

Being labeled as among Fig. 1 and Fig. 2:

11, mounting panel, 12, radiator, 13, strutting piece, 14, resistance-capacitance protection, 15, thyristor, 16, trigger.

Being labeled as among Fig. 3 and Fig. 4:

1, U type mounting panel, 2, air cooling equipment, 3, the secondary connection terminal, 4, the zero-cross triggering circuit plate, 5, ventilator cowling, 6, often drive temperature relay, 7, normally closed temperature relay, 8, radiator, 9, controllable silicon.

Embodiment

Contrast accompanying drawing below, by description to embodiment, to effect and operation principle, the manufacturing process of the mutual alignment between the shape of embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and manipulate method etc., be described in further detail, inventive concept of the present utility model, technical scheme had more complete, accurate and deep understanding to help those skilled in the art.

The of the present utility model structure expressed as Fig. 3, Fig. 4 is a kind of fling-cut switch of low voltage switchgear, comprises controllable silicon 9, radiator 8.

In order to solve the problem that exists at the described present known technology of this specification background technology part and to overcome its defective, realize improving the ventilation of fling-cut switch, the goal of the invention of heat-sinking capability, the technical scheme that the utility model is taked is:

As shown in Figure 3, the fling-cut switch of low voltage switchgear provided by the utility model is established air cooling equipment 2 in the described fling-cut switch.

Can be according to the size of the compensation capacity design controllable silicon 9 of reality and the area of dissipation and the junction temperature of radiator 8, the element that assembles is as shown in Figure 3.The air blast cooling device has good ventilation, heat sinking function, and the assurance thyristor is worked under the temperature control that requires, and improves the useful life of switch.

Fling-cut switch described in the utility model is established two U type mounting panels 1, the both sides that described U type mounting panel 1 blocks at described radiator 8.

Radiator 8 both sides are covered up by U type mounting panel 1, have formed the air duct of air cooling equipment, are convenient to radiator 8 heat radiations, reach heat radiation and improve the purpose in thyristor life-span.

Fling-cut switch described in the utility model also is provided with temperature virtual protection circuit, described temperature virtual protection circuit is established and is often driven temperature relay 6 and normally closed temperature relay 7, describedly often drive temperature relay 6 and normally closed temperature relay 7 is located on the described radiator 8, describedly often open the power supply that temperature relay 6 is connected described air cooling equipment 2; Described normally closed temperature relay 7 is connected with the loop of described fling-cut switch.

Coat heat-conducting silicone grease by will often driving temperature relay 6, and be installed on the radiator 8, the heat that produces during 9 work of induction controllable silicon, control air cooling equipment 2, after temperature exceeds normally closed temperature relay 7 temperature limits, whole loop protection and compulsory withdrawal running status.

Fling-cut switch described in the utility model is established zero-cross triggering circuit plate 4, and resistance-capacitance protection loop and the trigger on each thyristor in the described fling-cut switch are located on the described zero-cross triggering circuit plate 4.

Resistance-capacitance protection loop scattered in the prior art and the trigger on each thyristor are transplanted on the zero-cross triggering circuit plate 4, when reducing the space hold rate, have been increased the area of dissipation of thyristor, improved the stability of capacitance-resistance loop and circuits for triggering.

Zero-cross triggering circuit plate 4 described in the utility model is located in the ventilator cowling 5.

Ventilator cowling 5 guarantees that air cooling equipment 2 provides cooling blast that zero-cross triggering circuit plate 4 is cooled off fully.

Establish secondary connection terminal 3 on the fling-cut switch described in the utility model, described fling-cut switch is connected with controller by described secondary connection terminal 3.

Connect controller and fling-cut switch by secondary connection terminal 3, make fling-cut switch become an independent entry device,, promptly can realize the exchange between components and parts, be convenient to safeguard, make whole fling-cut switch have interchangeability so long as capacity is identical.

In addition, it is integrated thyristor, trigger board, radiator, axial flow blower, temperature controller, binding post etc. only need be connected with the mains when the user uses, and connect electric capacity down, and the secondary terminal connects controller, and wiring is succinct, and is easy for installation.

Be the structure chart of utility model as shown in Figure 3, this device is by forming with the lower part: U type mounting panel 1 air cooling equipment 2, secondary connection terminal 3, zero-cross triggering circuit plate 4, ventilator cowling 5, often open temperature relay 6, normally closed temperature relay 7, radiator 8 and controllable silicon 9, carry out the shell assembling according to shown in Figure 3.

The novel fling-cut switch that the utility model provides can be installed in the various low-voltage distribution dynamic compensating systems, can equally be placed in the drawout cubicles such as GCS, GCK, MNS by the pixel device, and the exchange performance is good, the safe class height.

In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; or design of the present utility model and technical scheme are directly applied to other occasion without improving, all within protection range of the present utility model.

Claims

1. the fling-cut switch of a low voltage switchgear comprises controllable silicon (9), radiator (8), it is characterized in that: establish air cooling equipment (2) in the described fling-cut switch.

2. according to the fling-cut switch of the described low voltage switchgear of claim 1, it is characterized in that: described fling-cut switch is established two U type mounting panels (1), and described U type mounting panel (1) blocks the both sides in described radiator (8).

3. according to the fling-cut switch of claim 1 or 2 described low voltage switchgears, it is characterized in that: described fling-cut switch also is provided with temperature virtual protection circuit, described temperature virtual protection circuit is established and is often driven temperature relay (6) and normally closed temperature relay (7), describedly often drive temperature relay (6) and normally closed temperature relay (7) is located on the described radiator (8), describedly often open the power supply that temperature relay (6) is connected described air cooling equipment (2); Described normally closed temperature relay (7) is connected with the loop of described fling-cut switch.

4. according to the fling-cut switch of claim 1 or 2 described low voltage switchgears; it is characterized in that: described fling-cut switch is established zero-cross triggering circuit plate (4), and resistance-capacitance protection loop and the trigger on each thyristor in the described fling-cut switch are located on the described zero-cross triggering circuit plate (4).

5. according to the fling-cut switch of the described low voltage switchgear of claim 4, it is characterized in that: described zero-cross triggering circuit plate (4) is located in the ventilator cowling (5).

6. according to the fling-cut switch of claim 1 or 2 described low voltage switchgears, it is characterized in that: establish secondary connection terminal (3) on the described fling-cut switch, described fling-cut switch is connected with controller by described secondary connection terminal (3).