CN2331126Y

CN2331126Y - Output voltage regulating device

Info

Publication number: CN2331126Y
Application number: CN 97225387
Authority: CN
Inventors: 刘雨林; 郭玉峥; 张文铿; 樊丽萍; 史爱平
Original assignee: JINGWEI ELECTRICAL APPLIANCE CO Ltd TAIYUAN
Current assignee: JINGWEI ELECTRICAL APPLIANCE CO Ltd TAIYUAN
Priority date: 1997-06-17
Filing date: 1997-06-17
Publication date: 1999-07-28
Anticipated expiration: 2007-06-17

Abstract

The utility model belongs to a circuit device for power supply or power distribution, which is used for the downhole in the coal mining industry to adjust the voltage of a downhole power supply circuit under the condition that the power does not fail. The utility model is characterized in that an X1 joint is respectively connected in series with a contact of a contactor 1C1 and a resistor R1, is connected in series with the contact of a contactor 2C1 and a resistor R4, and is connected with an X2 joint after connected in parallel with a winding between the X1 and the X2; the X2 joint is connected in series with the contact of a contactor 2C and is connected in parallel to an X31 through the contact of a contactor 1C; in a similar way, a Z1, a Z2, a Y1 and a Y2 are connected to an X33 and an X32 joints through the same connection mode.

Description

The output voltage adjusting device

The utility model belongs to the circuit arrangement of power supply or distribution.

In field of coal mining, dark cover layer is hidden the mode that coal can only adopt underground work, and annual production is one, 200,000 ton a middle and small scale coal mine, adopts low pressure to underground power supply used mostly, and the advantage of this supply power mode is that specification requirement is simpler, and the saving fund.But along with the increase of down-hole tunnelling footage, line loss strengthens, and voltage drop increases, and makes the situation that occurs on the working face that plant equipment can't be started and frequently burn motor.The no-load voltage ratio that Taiyuan transformer factory produces is 0.4: 0.69 electric power system, it mainly acts on is that original changing into by isolating transformer to underground power supply used 0.4KV is upgraded to 0.69KV, solved working face makes the equipment starting difficulty because of voltage is low problem to a certain extent, but the weak point of its existence is to need to have a power failure when changing voltage tap point, stop production, very inconvenient during use.

The device of adjustable output voltage under situation about not having a power failure that the purpose of this utility model provides that a kind of down-hole uses.

The utility model is to realize like this.

A kind of output voltage adjusting device, X1, Y1, Z1 are respectively the tap that the Circuit Fault on Secondary Transformer winding is drawn, X1 is series contactor 1C1 contact, resistance R 1 respectively, series contactor 2C1 contact, resistance R 4, with connect the X2 joint after the winding between the X1 to X2 is in parallel, be connected in parallel to X31 with the contact of X1 by contactor 1C after the X2 joint series contactor 2C contact; In like manner, Z1 and Z2, Y1 and Y2 are respectively with after two circuits that are in series with corresponding contact device 1C1 contact and resistance R 2, R3 and 2C1 contact and resistance R 5, R6 are in parallel, in parallel with the winding between the Z2 with Y1 again with Y2, Z1, with Y2, Z2 joint series contactor 2C contact, be parallel to X32 and X33 contact behind the series contactor 1C contact respectively again with Y1, Z1.

Compare with background technology, the beneficial effects of the utility model are:

1, when underground work need change voltage, can under situation about not having a power failure, adjust output voltage, can enhance productivity, and easy to operate, safe and reliable.

2, use range of regulation big,, the same circuit of corresponding shelves number be set according to the situation that is provided with of transformer output shelves number, can finish between the many grades of circuit just, reverse transformation.

Fig. 1 is a circuit diagram of the present utility model;

Fig. 2 is the control circuit figure of Fig. 1.

Be described further below in conjunction with implementing side.

After the transformer energized, secondary side induces correspondent voltage, when desiring to be sent to the down-hole, send from rated voltage shelves X1, Y1, Z1 earlier.Press the button 1AQ, then contact 1C1 and connect, contact 1C, i.e. X1 and X31, Y1 and X32, Z1 and X33 connection are sent to the down-hole with load voltage value.When desire is upgraded to second grade with voltage, can press the button 2AQ, then contactor 2C1 has connected transition resistance R4, R5, R6, connect simultaneously the 2C coil get electric, contactor 2C action, its normally closed interlock discharges the 1C coil blackout, thereby finished the conversion of voltage from first grade to second grade of output voltage, make X2 and X31, Y2 and X32, Z2 and X33 connect.As desire to fall back first grade, and can press the button 1AQ and make contactor 1C1 action, connect transition resistance R1, R2, R3, move by connecting tentaculum 1C coil simultaneously, thereby connected circuit X31, X32, X33, disconnected contactor 2C, finished from of the transition of second grade of voltage to first grade to the down-hole.

In like manner, foregoing circuit can be exported the situation that is provided with of class according to transformer, establishes many grades of same circuit, can finish between the many grades of circuit just, reverse transformation.

X12, X13 joint connect power line among Fig. 2.

Claims

1, a kind of output voltage adjusting device, it is characterized in that X1, Y1, Z1 are respectively the tap that the Circuit Fault on Secondary Transformer winding is drawn, X1 is series contactor 1C1 contact, resistance R 1 respectively, series contactor 2C1 contact, resistance R 4, with connect the X2 joint after the winding between the X1 to X2 is in parallel, be connected in parallel to X31 with the contact of X1 by contactor 1C after the X2 joint series contactor 2C contact; In like manner, Z1 and Z2, Y1 and Y2 are respectively with after two circuits that are in series with corresponding contact device 1C1 contact and resistance R 2, R3 and 2C1 contact and resistance R 5, R6 are in parallel, in parallel with the winding between the Z2 with Y1 again with Y2, Z1, with Y2, Z2 joint series contactor 2C contact, be parallel to X32 and X33 contact behind the series contactor 1C contact respectively again with Y1, Z1.