CN203433382U

CN203433382U - Multifunctional control box for transformer fan

Info

Publication number: CN203433382U
Application number: CN201320462855.7U
Authority: CN
Inventors: 曾力; 张嵘
Original assignee: State Grid Corp of China SGCC; State Grid Sichuan Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Sichuan Electric Power Co Ltd
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2014-02-12
Anticipated expiration: 2023-07-31

Abstract

The utility model discloses a multifunctional control box for a transformer fan, and the control box comprises a temperature controller and a second relay. The temperature controller comprises a detector, a controller, a switch K1, and a switch K2. The beneficial effects of the utility model comprise that the control box provided by the utility model detects the temperature of a transformer oil tank, thereby controlling the starting and stopping of the fan according to the size of the temperature; and only when the temperature of the transformer oil tank is higher than a certain limit, is the fan started for reducing the temperature, and the fan is not needed to be always on, thereby saving power. According to the utility model, a time-control switch is employed for controlling the fan, thereby controlling the starting of the fan in a stage manner.

Description

Transformer blower fan multi-functional control case

Technical field

The utility model relates to electrical control field, particularly relates to a kind of transformer blower fan multi-functional control case.

Background technology

General transformer has by blower fan and dispels the heat, and as Fig. 1, blower fan M is generally by electrothermal relay EH, the first relay K M and air switch QF incoming transport power supply, and blower fan M starts always, wastes very much electric energy.

Utility model content

The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, and transformer blower fan multi-functional control case is provided, and solves the existing blower fan that transformer is dispelled the heat because constantly start, thus the defect of significant wastage electric energy.

The purpose of this utility model is achieved through the following technical solutions: transformer blower fan multi-functional control case, comprise temperature controller, time switch KT and the second relay, described temperature controller comprises detector, controller, K switch 1 and K switch 2, the probe of described detector touches the fuel tank of transformer, its output is connected to controller, described K switch 1 and the control end of K switch 2 are also connected to controller, the coil P1 of the second relay, K switch 1, K switch 2 and power supply AC form a loop, the normal open switch K4 of the second relay is connected in parallel in K switch 2, the normal open switch K3 of the second relay, the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M and power supply AC form a loop, the inlet side of described time switch KT connects the live wire of power supply AC, T end connects the zero line of power supply AC, go out end through the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M connects the zero line of power supply AC.In this patent, when the fuel tank temperature that detector detects transformer exceeds boundary, transmit a signal to controller, controller gauge tap K2 is closed (in lowest limit between high threshold time, K1 is closed for controller meeting gauge tap), the coil P1 of such the second relay, K switch 1, the loop start that K switch 2 and power supply AC form, the coil of KM1 connects after electricity, make its normal open switch K3 and normal open switch K4 closed, the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M connects with the mains, electrothermal relay EH and the first relay K M are activated, make blower fan access power supply, thereby start, to oil tank of transformer, lower the temperature, when following to high threshold after oil tank of transformer temperature reduces, K switch 2 disconnects, but the normal open switch K4 in parallel with K2 is closed, so blower fan continues unlatching, when oil tank of transformer temperature is reduced to lowest limit, K switch 1 disconnects, thereby blower fan is shut down.

Further, on the coil P1 of the second described relay, K switch 1, K switch 2 and a loop of power supply AC formation, be also in series with a push switch SB3, for manually controlling the unlatching of this fan control box.

Further, also comprise a time switch KT, the inlet side of described time switch KT connects the live wire of power supply AC, T end connects the zero line of power supply AC, go out end through the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M connects the zero line of power supply AC, adopt time switch KT, time is while arriving default start-up time, time switch KT goes out to hold output supply voltage, electrothermal relay EH and the first relay K M are activated, blower fan entry into service, when the time, arrive preset stopping during the time, time switch KT goes out to hold Non voltage output, electrothermal relay EH and the first relay K M disconnect, blower fan shuts down, to the next one, period repetition start and stop action is set, 8 periods can be set altogether in controller.

Further, between the inlet side of described time switch KT and the live wire of power supply AC, be provided with a push switch SB2, manually control time switch and whether enable.

Further, on the normal open switch K3 of the second above-mentioned relay, be parallel with a push switch SB1, for manually direct starter motor, motor often left, when temperature control, time control are broken down, use.

Further, after the normal open switch K5 of the first above-mentioned relay K M connects with display lamp HG, be connected to power supply AC two ends, at the first relay K M coil, connect electricity like this, when the first relay K M starts, normal open switch K5 can be closed, and display lamp HG can light, thus prompting staff.

Further, after the normally closed switch K6 of the first above-mentioned relay K M connects with display lamp HR, be connected to power supply AC two ends, when the first relay K M coil losing electricity, when it is closed, normally closed switch K6 can be closed, thus prompting staff.

The beneficial effects of the utility model are:

(1) whether the utility model is surveyed the temperature of oil tank of transformer, according to the height of this temperature, thereby control blower fan, open, and only, when oil tank of transformer temperature exceeds certain limit, just opens blower fan and lowers the temperature, and without always opening blower fan, has saved power supply;

(2) the utility model also adopts time switch to control blower fan, thereby controls the startup of blower fan stagely.

Accompanying drawing explanation

Fig. 1 is the wiring diagram of motor;

Fig. 2 is the circuit diagram of embodiment 1

Fig. 3 is the structured flowchart of temperature controller in embodiment 1;

Fig. 4 is the circuit diagram of embodiment 2;

Fig. 5 is the circuit diagram of embodiment 3.

Embodiment

Below in conjunction with embodiment, the utility model is described in further detail, but structure of the present utility model is not limited only to following examples:

[embodiment 1]

As Fig. 2, shown in Fig. 3, transformer blower fan multi-functional control case, comprise temperature controller, time switch KT and the second relay, described temperature controller comprises detector, controller, K switch 1 and K switch 2, the probe of described detector touches the fuel tank of transformer, its output is connected to controller, described K switch 1 and the control end of K switch 2 are also connected to controller, the coil P1 of the second relay, K switch 1, K switch 2 and power supply AC form a loop, the normal open switch K4 of the second relay is connected in parallel in K switch 2, the normal open switch K3 of the second relay, the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M and power supply AC form a loop, the inlet side of described time switch KT connects the live wire of power supply AC, T end connects the zero line of power supply AC, go out end through the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M connects the zero line of power supply AC.In this patent, when the fuel tank temperature that detector detects transformer exceeds boundary, transmit a signal to controller, controller gauge tap K2 is closed (in lowest limit between high threshold time, K1 is closed for controller meeting gauge tap), the coil P1 of such the second relay, K switch 1, the loop start that K switch 2 and power supply AC form, the coil P1 of KM1 connects after electricity, make its normal open switch K3 and normal open switch K4 closed, the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M connects with the mains, electrothermal relay EH and the first relay K M are activated, make blower fan access power supply, thereby start, to oil tank of transformer, lower the temperature, when following to high threshold after oil tank of transformer temperature reduces, K switch 2 disconnects, but the normal open switch K4 in parallel with K2 is closed, so blower fan continues unlatching, when oil tank of transformer temperature is reduced to lowest limit, K switch 1 disconnects, thereby blower fan is shut down.

In the present embodiment, detector is temperature inductor, and probe is the detection probe of temperature inductor, single-chip microcomputer of controller, and the signal of reception temperature inductor, and according to this Signal-controlled switch K1 and K switch 2.

[embodiment 2]

As shown in Figure 4, the structure of the present embodiment and embodiment 1 are basically identical, difference is also to comprise a time switch KT, the inlet side of described time switch KT connects the live wire of power supply AC, T end connects the zero line of power supply AC, go out end through the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M connects the zero line of power supply AC, adopt time switch KT, time is while arriving default start-up time, time switch KT goes out to hold output supply voltage, electrothermal relay EH and the first relay K M are activated, blower fan entry into service, when the time, arrive preset stopping during the time, time switch KT goes out to hold Non voltage output, electrothermal relay EH and the first relay K M disconnect, blower fan shuts down, to the next one, period repetition start and stop action is set, 8 periods can be set altogether in controller.

In the present embodiment, on the coil P1 of the second relay, K switch 1, K switch 2 and a loop of power supply AC formation, be also in series with a push switch SB3, for manually controlling the unlatching of this fan control box.

In the present embodiment, between the inlet side of time switch KT and the live wire of power supply AC, be provided with a push switch SB2, manually control time switch and whether enable.

In the present embodiment, on the normal open switch K3 of the second relay, be parallel with a push switch SB1, for manually direct starter motor, motor often left, when temperature control, time control are broken down, use.

[embodiment 3]

As shown in Figure 5, the structure of the present embodiment and embodiment 2 are basically identical, difference is to be connected to power supply AC two ends after the normal open switch K5 of the first relay K M connects with display lamp HG, at the first relay K M coil, connect electricity like this, when the first relay K M starts, normal open switch K5 can be closed, and display lamp HG can light, thus prompting staff.

In the present embodiment, the normally closed switch K6 of the first relay K M is connected to power supply AC two ends after connecting with display lamp HR, and when the first relay K M coil losing electricity, when it is closed, normally closed switch K6 can be closed, thus prompting staff.

Claims

1. transformer blower fan multi-functional control case, it is characterized in that, comprise temperature controller and the second relay, described temperature controller comprises detector, controller, K switch 1 and K switch 2, the probe of described detector touches the fuel tank of transformer, its output is connected to controller, described K switch 1 and the control end of K switch 2 are also connected to controller, the coil P1 of the second relay, K switch 1, K switch 2 and power supply AC form a loop, the normal open switch K4 of the second relay is connected in parallel in K switch 2, the normal open switch K3 of the second relay, the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M and power supply AC form a loop.

2. transformer blower fan multi-functional control case according to claim 1, is characterized in that, on the coil P1 of the second described relay, K switch 1, K switch 2 and a loop of power supply AC formation, is also in series with a push switch SB3.

3. transformer blower fan multi-functional control case according to claim 1, it is characterized in that, also comprise a time switch KT, the inlet side of described time switch KT connects the live wire of power supply AC, T end connects the zero line of power supply AC, goes out to hold through the thermal element P3 of electrothermal relay EH, the coil P2 of the first relay K M connects the zero line of power supply AC.

4. transformer blower fan multi-functional control case according to claim 3, is characterized in that, between the inlet side of described time switch KT and the live wire of power supply AC, is provided with a push switch SB2.

5. transformer blower fan multi-functional control case according to claim 1, is characterized in that, is parallel with a push switch SB1 on the normal open switch K3 of the second described relay.

6. transformer blower fan multi-functional control case according to claim 1, is characterized in that, after the normal open switch K5 of the first described relay K M connects with display lamp HG, is connected to power supply AC two ends.

7. transformer blower fan multi-functional control case according to claim 1, is characterized in that, after the normally closed switch K6 of the first described relay K M connects with display lamp HR, is connected to power supply AC two ends.