KR940002606Y1 - Control device for high voltage circuit breaker - Google Patents

Abstract

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Description

Remote control device of high voltage circuit breaker

1 is a side view of a conventional high pressure circuit breaker.

2 is a front view of a conventional high voltage circuit breaker.

3 is a side view of the present invention.

4 is a partial cutaway front view of the present invention.

5 is a perspective view of a rail gearboard of the present invention.

6 is a control circuit diagram of the present invention.

7 is a block diagram of a remote control panel of the present invention.

* Explanation of symbols for main parts of the drawings

20: high-pressure cut-off body 22: interlock lever

23: contactor 24: cloud gear

25: gear rail 26: test position limit switch

27: run position limit switch 28: motor

35: Actuator 36: the first magnet contactor

37: second magnet contactor 38: test display lamp

39: Run display lamp 40: Selection switch

41: start switch 42: emergency switch

43: remote control panel

The present invention relates to a large-capacity high-voltage circuit breaker for transmission and reception substations dealing with high voltage, and more particularly, to a remote control device of a high-voltage circuit breaker for preventing safety accidents when entering and exiting the high-voltage circuit breaker.

Large high voltage circuit breakers (GCB, VCB) are installed in the substation for transmitting and receiving high voltage. The schematic structure of the high-voltage circuit breaker, as shown in Figures 1 and 2, is designed to move the rolling gear 14 along the gear rail 15 to move the high-voltage circuit breaker body 10, the contactor The handle 11 and the interlock lever 12 are provided on the opposite side of the 13.

Accordingly, the high voltage is interrupted by lifting the interlock lever 12 to release the lock and pulling the handle 11 to separate the contactor 13 when the high voltage is cut off. On the contrary, when the high pressure is connected, the interlock lever 12 is lifted. The contactor 13 is connected by pushing the main body 10 while holding the handle 11 in a state.

However, since the high voltage cut-off and connection are accompanied by the operation of pushing and pulling the high voltage circuit breaker main body 10 directly, the high voltage circuit breaker, the operation of the high voltage circuit breaker is avoided because the risk of electric shock due to the arc discharge lamp.

The present invention proposes a remote control device of a high voltage circuit breaker capable of excluding the risk of safety accidents at the time of entry and exit of the high voltage circuit breaker as described above.

The core technical configuration of the present invention is to install the geared motor for the main body transfer and the limit switch for test and run position recognition on the main body of the high-voltage circuit breaker, install the test and run position limit switch actuator on the gear rail board, It can be summarized as installing a switch and a lamp for controlling the motor and displaying the control status.

Hereinafter, the present invention will be described based on the accompanying drawings.

As shown in FIGS. 3 to 5, a geared motor 28 is installed at a lower portion of the main body 20 including the handle 21 and the contactor 23. The motor gear 29 installed on the shaft of the motor 28 is connected to the reduction gear 30 coupled to the shaft 31 to install the rotational force of the motor to be transmitted to the rolling gear 24.

In addition, two limit switches, that is, a test position limit switch 26 and a run position limit switch 27, are provided at a predetermined interval on one side of the lower part of the main body 20, and the limit switch actuator is provided between the limit switches 26 and 27. Install (35). The actuator 35 is mounted on a rail board between the gear rails 25. In addition, the interlock lever 22 is installed at the handle 21 position of the main body 20, and correspondingly, the test position locking hole of the locking supporter 32 is installed on the rail board between the gear rails 25. 33) and the run position locking hole 34 is installed so that the interlock lever 22 is inserted and supported.

In FIG. 4, reference numeral 40 denotes a motor power input contactor.

6 shows a motor remote control circuit of the present invention.

Here, the UVW terminal of the geared motor 28 driving the high-voltage circuit breaker main body has a three-phase voltage of RST, each a contact point 36a _{3 of} the first magnet contactor 36 and the second magnet contactor 37, which will be described below. , 37a ₃ ) are selected to be supplied with the positive and reverse voltage.

The first magnet contactor 36 includes an emergency switch 42, a start switch 41, a test terminal a of the selection switch 40, a b contact 37b ₁ of the second magnet contactor, a test position limit switch ( 26) are connected in series to be driven by two-phase voltage of RST three-phase voltage.

The second magnet contactor 37 includes an emergency switch 42, a start switch 41, a run terminal c of the selection switch 40, a b contact 36b ₁ of the first magnetic contactor, and a run position limit switch ( 27) are connected in series as described above to be driven by the two-phase voltage of the RST three-phase voltage.

The start switch 14 is further provided with a respective self-holding a contact 36a ₁ , 37a ₁ for holding the first and second magnet contactors 36, 37 in parallel, and the selection switch 40 A stop terminal b is included in addition to the test and run terminals a and c.

In addition, a test display lamp 38 and a run display lamp 39 are provided on the first and second magnet contactors 36 and 37 driving voltage lines, and the test display lamp 38 is a contact of the first magnet contactor. 36a ₂ , the run display lamp 39 is controlled to be connected by a contact 37a ₂ of the second magnet contactor.

In the above, the three-phase power driving method is taken as an example, but it is apparent that the single-phase power driving method has the same configuration.

Here, the contact a refers to a contact which is turned on when power is supplied to the magnet contactor, and the contact b refers to a contact which is turned off when power is supplied to the magnet contactor.

7 is a configuration diagram of a remote control panel 43 for controlling the high-voltage circuit breaker main body 20 in which the geared motor 28 is installed. The selection switch 40, the start switch 41, and the emergency switch of FIG. (42) and run and test lamps 39 and 38 are provided.

Referring to the operation of the present invention configured as described above is as follows.

If you want to cut off the high-voltage line in the substation, lift the interlock lever 22 of the high-voltage circuit breaker body 20 to release the locking state and position the selector switch 40 on the remote control panel 43 to the test terminal ( Select a) and press the start (button) switch (41).

Accordingly, the first magnet contactor 36 has an emergency switch 42, a start switch 41, a test terminal a of the selection switch 40, a b contact 37b ₁ of the second magnet contactor, and a test position limit switch. Since operation voltage 26 is supplied in series, the contact point 36a _{3 thereof} is turned on so that the RST three-phase power is supplied to the motor UVW terminal so that the motor rotates forward.

Therefore, since the shaft 31 of the breaker main body 20 is decelerated and rotated through 30, the rolling gear 24 moves along the gear rail 25 to separate the contactor 23.

At this time, the first magnet contactor 36 maintains self-retention even when the start switch 41 is turned off by its a contact 36a ₁ , and at the same time another a contact 36a ₂ is turned on so that the test display lamp 38 ) Lights up, indicating that the current test state. In addition, the operation of the first magnet contactor 36 opens its b contact 36b ₁ to cut off the operation power supply to the second magnet contactor 37.

On the other hand, the test position limit switch 26 provided in the high voltage circuit breaker main body 20 is a limit switch actuator while the motor 28 continues to rotate forward and moves the high voltage circuit breaker to the test side by the operation of the first magnet contactor 36. Upon reaching 35, the limit switch 26 is turned off.

Yiettara first magnet contactor 36 is turned off all of its a-contact (36a ₁ -36b ₃₎ are all opened, and b contact (36b ₁₎ is so closed, the motor 28 and the test indicator lamp 38 is not driven Will not.

After opening the high pressure circuit breaker to complete the inspection and repair of the equipment, and then push the high pressure circuit breaker main body 20 to connect the contactor 23, the selector switch 40 installed on the remote control panel 43 is placed on the run side. Position and press the start (button) switch (41).

As a result, the emergency switch 42, the start switch 41, the run terminal c of the selector switch 40, the b contact 36b ₁ of the first magnet contactor, and the run position limit switch 27 are connected in series. since voltage is supplied to the second magnet contactor 37 and all of its a-contact (37a ₁ -37a ₃₎ is closed, b contact (37b ₁₎ is opened.

Therefore, since the three-phase RST voltage is respectively supplied to the WUV terminals of the motor 28, the motor 28 rotates in reverse to move the high-pressure cut-off body 20 to the run side.

At this time, the second magnet contactor 37 is self-held by its contact a 37b ₁ , and the run display lamp 39 is lighted up by its contact a 37a ₂ .

Similarly, when the second magnet contactor 37 is turned on, its b contact 37b is opened to suppress the operation of the first magnet contactor 36.

On the other hand, when the high-voltage circuit breaker main body 20 moves to the run side by the reverse rotation of the geared motor 28, the time when the contactor 23 is connected, that is, the run position limit switch 27 is operated by the limit switch actuator 35. At this time, the driving of the second magnet contactor 37 is performed. As a result, the a contacts 37a _{1 to} 37a ₃ of the second magnet contactor 37 are opened and the b contacts 37b ₁ are closed, so that the drive of the geared motor 28 is turned off and the run display lamp L is also Is off.

Then, when the interlock lever 22 is lowered, an end thereof is inserted into the run position locking hole 34 of the locking supporter 32 to prevent the movement of the high voltage circuit breaker main body 20.

On the other hand, the emergency switch 42 interrupts the voltage supply of the first and second magnet contactors 36 and 37 when a temporary stop is required due to a sudden occurrence of an accident when moving to the run and test positions of the high voltage breaker main body 20. By limiting the power supply to (28) it is to pause the movement of the high-voltage circuit breaker body 20.

As described above, the present invention installs a geared motor in a high voltage circuit breaker that is used as a high voltage on / off facility in a substation, and the motor is connected to the magnet contactor control switch and the run and test position limit switches attached thereto. Since the contactor connection and disconnection of the high voltage breaker can be controlled remotely, it is possible to prevent safety accidents due to arc generation and high voltage proximity during high voltage interruption.

Claims (1)

In the high pressure circuit breaker including the rolling gear 24, the interlock lever 22, and the high voltage contactor 23 moving along the gear rail 25, the rolling gear 24 is driven inside the main body 20 of the high voltage circuit breaker. A geared motor 28 is installed, and run and test position limit switches 27 and 26 are spaced apart at regular intervals from the lower part of the main body 20, and the run and test position limit are mounted on a gear rail 25 board. An actuator 35 is provided for operating the switches 27 and 26, and the motor 28 is forward and reverse by the contact a 36a ₃ and 37a ₃ of the first and second magnet contactors 36 and 37. Drive, and the emergency switch 42, the start switch 41, the selector switch 40 in common, and the first magnet through the contact b (37b ₁ ) and the test position switch 26 of the second magnet contactor the contactor (36) is made through the contact point b of the first magnet contactor (36b ₁₎ and a run position switch 27 A second magnet contactor 37 is driving connected, respectively, and wherein the 1, a contact of the second magnet contactor (36a _2, 37a ₂₎ are tested and run indicator light (38, 39) a drive connected by a The selector switch 40, the start switch 41, the emergency switch 42, the run and test indicator lamps 39 and 38 are installed in a separate remote control panel 43. Remote control of the breaker.