KR19980057442U - Switchgear controller for power distribution - Google Patents

Abstract

A switchgear control device for a power distribution switch that enables on-site control and remote control, comprising: a switchgear control device for a switchgear that operates a switch in a connected or disconnected state, wherein the user selects one of a connected or disconnected state in the field; Selective switching unit, connection and disconnection unit for operating the switch in the connected or disconnected state depending on whether power is applied, the first transmission unit, the switch for supplying power to the connection and disconnection in response to the operation of the switch selected by the first selection switch unit The control unit for generating a control signal for remote control of the automatic control, and the second selection switching unit for selecting one of the connection or disconnection state of the connection and disconnection in accordance with the control signal of the control unit to improve the efficiency and reliability of power supply You can.

Description

Switchgear controller for power distribution

The present invention relates to a switchgear control device for distribution, and more particularly to a switchgear control device for the distribution and automation can be achieved in the field and remote control.

As shown in FIG. 1, a conventional switchgear control device includes a first switch for switching a switch from a locked state (not controllable) to a released state (controllable) or from a released state to a locked state at a site where a switch is installed. (SW1), A contact relay RY1 for allowing the user to self-hold the pushbutton switch PB1 (PB2) and the pushbutton switch PB1 (PB2) for respectively selecting the opening / closing operation of the switch. RY2, B contact relays RY1, RY2, cam switches CAM1, CAM2, CAM3, and A contact relays RY1, RY2. MRY2), the arc (arc removal) diodes D1 (D2), lamps (not shown), etc., for preventing arcs occurring in the first and second excitation coils MRY1 and MRY2 are operated. It is configured with a third excitation coil (MC1) for displaying the field lock state of the.

At this time, the first switch SW1 is manually switched in the field, and the third excitation coil is used to indicate the locked state of the C contact relay and the switch to maintain the operation of the two C contact relays, that is, the switch. It is composed of a C contact relay that supplies power to MC1 and is connected to the same terminal, that is, a lock end or a release end at the same time. In addition, the cam switch is a kind of a selector switch, and a plurality of switches are connected to each other so that some or all of them can be turned on or off according to a user's operation.

The operation of the switchgear control device according to the prior art configured as described above is as follows.

First, when the first switch SW1 is in the locked state, power is not supplied even when the user presses the pushbutton switches PB1 and PB2. Therefore, the operating state of the switch is not switched to the connected or disconnected state and maintains the current state. . Subsequently, the third excitation coil MC1 is energized and excited to display the locked state of the switch by driving the display lamp.

Next, when the first switch SW1 is released and the user wants to operate the switch in a connected state, when the pushbutton switch PB1 is pressed, the power supplied through the release end is the B contact relay RY2 and the cam switch. It is applied to the first excitation coil MRY1 via CAM2. At this time, the push button switch PB1 returns to its original state immediately after the user presses due to its characteristics. Therefore, the self-holding A contact relay RY1, which operates in conjunction with the first excitation coil MRY1, is kept in an on state, thereby maintaining the excitation state of the first excitation coil MRY1. Accordingly, the first excitation coil MRY1 supplies power to various devices requiring power by keeping the switch in a connected state.

On the other hand, when the first switch SW1 is in a released state and the user wants to operate the switch in a cutoff state, when the pushbutton switch PB2 is pressed, the power supplied through the release end is supplied to the B contact relay RY1 and the cam switch ( It is applied to the second excitation coil MRY2 through CAM1). Subsequently, the self-holding A contact relay RY2, which cooperates with the second excitation coil MRY2, is kept in an on state, thereby maintaining the excitation state of the second excitation coil MRY2. At this time, since the second excitation coil MRY2 is excited, the B contact relay RY2 is turned off, and thus the first excitation coil M1RY is not supplied with power, and thus, the switch is not maintained in the connected state. Therefore, the second excitation coil MRY2 cuts off the power supply by keeping the switch in a cutoff state. At this time, if arc occurs in the first and second excitation coils MRY1 and MRY2, the respective arc elimination diodes D1 and D2 remove them.

The switchgear control device for power distribution according to the prior art has a problem that only the manual operation of the switchgear in the field is possible, and thus, the power supply accuracy or the reliability of the power supply is deteriorated because power distribution or distribution blocking operation is performed.

Therefore, an object of the present invention is to provide a switchgear control device for distributing power automatically by controlling the switchgear in the field and remotely.

1 is a circuit diagram showing a switchgear control device according to the prior art,

Figure 2 is a layout showing a switchgear control device for distribution according to the present invention.

Explanation of symbols for the main parts of the drawings

RY1, RY2, RY4, RY5: contact A and contact B relays

PB1, PB2: Pushbutton Switches

CAM1, CAM2, CAM3: Cam Switch

D1, D2: SOHO (Arc Removal) Diodes

MRY1, MRY2, MC1, MRY4, MRY5: Excitation coils R1, R2, R3: Resistance

PC1: Photocoupler TR1, TR2: Transistor

LED1: Light emitting diode 20: Control part

21: drive unit

The present invention provides a switchgear control device for a switchgear that operates the switch in a connected or disconnected state, the first selection switching unit for the user to select one of the connected or disconnected state in the field, connected or disconnected state depending on whether the power supply And a first transmission unit for supplying power to the connection and disconnection unit corresponding to the operation of the switch selected by the first selection switch unit, a controller for automatically generating a control signal for remotely controlling the switch, and a control unit. And a second selection switching unit for selecting one of a connection and a blocking state of the connection and the blocking unit according to the control signal of the control unit.

Hereinafter with reference to the accompanying drawings will be described a switchgear control device according to the present invention.

Figure 2 is a layout showing a switchgear control device for distribution according to the present invention.

First, the switchgear control device for distribution according to the present invention is composed of a part for controlling the switch in the field and a part for remote control, the part for controlling the switch in the field is the same as the configuration of the prior art described in FIG. Part for remote control is added. Therefore, the same reference numerals are assigned to the same components as those in the prior art, and description thereof will be omitted, and the additional components will be described as follows.

The switchgear control device for power distribution according to the present invention, as shown in Figure 2, the second switch (SW2) for selecting one of the on-site control and remote control, release the remote control operation of the switch in a locked state (remote control impossible) Of the control unit 20 and the control unit 20 for generating a control signal for automatically remotely controlling the third switch SW3 for switching from the unlocked state to the state (remote controllable) or in the unlocked state. A contact relay 21 for driving the third switch SW3 and the excitation coil MRY4 and MRY5 according to the control signal, the A contact relay RY4 and the RY5 operating in conjunction with the excitation coil MRY4 and MRY5. The third switch SW3 is configured to further include a photo coupler PC1 that is turned on to excite the third excitation coil MC1 when the switch SW3 is switched to the remote lock state. At this time, the second switch SW2 uses a C contact relay that is manually switched in the field. In addition, the third switch SW3 uses a C contact relay that is automatically switched by the controller 20.

The operation of the switchgear control device according to the present invention configured as described above is as follows.

First, the operation of controlling the switch in the field is the same as the conventional technology described with reference to FIG. 1.

However, in order to be able to control the switch in the field, the second switch SW2 should be connected to the site end and the site end of the remote end.

On the other hand, when remotely controlling the switchgear, in order to enable remote control, the second switch SW2 must be connected to the remote end. Subsequently, when the switch is to be operated in a connected state, the control unit 20 applies a control signal to the driving unit 21 to excite the exciting coil MRY4. At this time, even if the second switch SW2 is connected to the remote end, when the third switch SW3 is connected to the lock end, remote control is not possible because power is not supplied to the A contact relay RY4 that operates in conjunction with the excitation coil MRY4. Do. Therefore, the control unit 20 applies a control signal to the driving unit 21 and simultaneously switches and connects the third switch SW3 to the release end, and maintains the state when the third switch SW3 is in the released state. Subsequently, the A contact relay RY4 which cooperates with the exciting coil MRY4 is turned on, and the first contact coil MRY1 is excited because the B contact relay RY2 and the cam switch CAM2 are in the ON state. Therefore, the switch maintains the connection state and supplies power to various devices. In addition, when the switch is to be cut off, when power is applied to the excitation coil MRY5 from the driving unit 21 under the control of the control unit 20, the contact point A relay RY5 → contact point B relay RY1 → cam switch ( CAM1) → The switch maintains the cut-off state by the linking operation of the second excitation coil MRY2. In this case, in order to enable remote control, the second switch SW2 must be connected to the remote end, and the third switch SW3 must be connected to the release end by the control unit 20.

On the other hand, when the third switch SW3 is connected to the lock end by the driving unit 21 under the control of the control unit 20, power is not supplied to the A contact relays RY4 and RY5 connected to the release end. Therefore, it is impossible to drive the contact A relays RY4 and RY5 in the field, thereby making remote control impossible. In addition, the light emitting diode LED1 of the photo coupler PC1 is connected to the lock terminal and is supplied with power to emit light, and the photo transistor TR1 receives the light and turns on the same, thereby applying power to the base of the transistor TR2. Subsequently, the transistor TR2 is turned on to excite the third excitation coil MC1, and thus a lamp or the like which operates in association with the third excitation coil MC1 is driven to display a remote control lock state.

The switchgear control device for power distribution according to the present invention can be remotely controlled by using a circuit and a small amount of hardware used in the field control as well as the field control, thereby improving the efficiency and reliability of power supply by automating distribution. .

Claims (2)

In the switchgear control device for power distribution that operates the switch in a connected or disconnected state, A first selection switching unit for selecting one of the connected or disconnected states by the user in the field; Connection and blocking unit for operating the switch in the connected or disconnected state depending on whether power is applied; A first transmission unit configured to supply power to the connection and disconnection unit in response to an operation of the switch selected by the first selection switching unit; A controller for generating a control signal for automatically remotely controlling the switch; And a second selection switching unit configured to select one of the connection and disconnection states of the connection and disconnection units according to the control signal of the controller. The method of claim 1, The second selective switching unit Two relays formed by two excitation coils and their contacts for selecting one of the connected or disconnected states, A driving unit for driving one of the two excitation coils according to a control signal of the control unit; And a switching unit configured to select and connect a locked and released state according to the control signal of the controller.