KR200210621Y1 - Generator Control Local Valve Test Circuit - Google Patents

Abstract

The present invention connects the test circuit 10 to the connection line of the local valve (2) connected to the main operation panel,

The test circuit 10 receives a switch unit 11 for driving the drive relay 4 of the local valve 2 and a power source connected to the drive relay 4 when the switch unit 11 instructs to open. The cross lamp 13-1 is turned on by receiving the open lamp unit 12 to which the open lamp 12-1 is turned on, and the power supplied to the drive relay 4 when the switch unit 11 is in the cross state. Including a cross lamp unit 13 and a failure indicator lamp unit 14 which receives an abnormal operation output of the drive relay 4 when the switch unit 11 is operated to drive the failure indicator lamp 14-1. It is a generator test valve test circuit,

In order to check whether the local valve is abnormal, by disconnecting the control panel and connecting the circuit of the present invention, it is possible to check the error by operating the switch constituting the circuit to check the error by lighting the interlocking lamp.

Description

Generator Control Local Valve Test Circuit

The present invention relates to a generator control circuit (MOV) test circuit, and more particularly to a test circuit for testing the abnormality of the valve is connected to the switchboard is distributed.

In general, generator control valves are designed to collectively control the corresponding motor operated valves in the switchboard. This is because the integrated system system which centrally controls various controls is adopted. For example, as illustrated in FIG. 1, a local valve 2 performing a valve function by a motor 1 and a distributed installation of these local valves 2 where necessary and operated to drive them as necessary. And an operation panel 3. In this case, the driving valve 4 is installed in the local valve 2 to control the forward and reverse rotation of the motor 1 so that the valve is operated. Therefore, in case of repairing the local valve in case of abnormality, it is necessary to move to the place where the local valve 2 is installed and repair the local valve 2, and the local valve 2 simply functions as a valve at the local position. There is no need for a separate operation means or display means because it is only necessary to perform the operation.In order to check the abnormality of the local valve, the repairman 1 on the switchboard and the repairman 2 (repair at the local local valve) communicate with each other by wire or wirelessly. While sending an operation signal at this time there is an inconvenience to check the contact and operation of the drive relay 4 by using a jump line or the like whether there is an error.

The purpose of the present invention is to solve this problem, and is provided with a separate test circuit connected to the connection line between the existing local valve and the operation panel to check the operation of the local valve in a simple manner.

To this end, the present invention separates the connection data line between the local valve and the operation panel, and configures the circuit of the present invention to connect to the local valve data line if necessary.

1 is a schematic configuration diagram showing a connection state of a conventional valve;

2 is a block diagram showing a connection state of the present invention and a valve;

3 is a configuration diagram of the test circuit of the present invention,

4 is a schematic circuit diagram showing an example of a local valve used in the present invention.

Explanation of symbols for the main parts of the drawings

10; test circuit 11; switching part

12; open lamp unit 13; cross lamp unit

14; fault indication lamp unit

In other words, the present invention separates the connection line between the local valve and the operation panel, and connects the test circuit to the local valve, and the test circuit is connected to the drive relay when the switch unit instructs the opening of the local valve. An open lamp unit in which an open lamp is turned on when the power supply is turned on; a cross lamp unit in which a cross lamp is lit when the switch unit is turned on when the switch unit is in a cross state; and an abnormal operation of the drive relay when the switch unit is operated. And a failure indicator lamp unit for receiving an output to drive the failure indicator lamp.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Figure 2 is a block diagram showing the installation state of the present invention, Figure 3 is a circuit diagram of the present invention, disconnects the connection line with the operating panel (3) for driving the local valve (2) and testing the present invention on the local valve (2) To connect the circuit (10),

The test circuit 10 receives a switch unit 11 for driving the drive relay 4 of the local valve 2 and a power source connected to the drive relay 4 when the switch unit 11 instructs to open. The cross lamp 13-1 is turned on by receiving the open lamp unit 12 to which the open lamp 12-1 is turned on, and the power supplied to the drive relay 4 when the switch unit 11 is in the cross state. Including a cross lamp unit 13 and a failure indicator lamp unit 14 which receives an abnormal operation output of the drive relay 4 when the switch unit 11 is operated to drive the failure indicator lamp 14-1. Is done. Of course, the local valve (2) is provided with a drive relay (4) for controlling the drive of the motor (1), the drive relay (4) is to have several contact outputs to connect the circuit of the present invention using this Configure. Figure 4 is an example of a local valve (2) used in the present invention is a product of the limit torque (LIMIT TORQUE) and can be operated only in the switchgear by the DDC method, in particular from the switchboard (operation panel (3)) As the driving relay 4 circuit of the local valve 2 under control, the three-phase alternating current power source changes the rotation of the motor 1 by the contacts of the magnetic contactors 42-O and 42-C, thereby opening or crossing the valve. The state is selected and maintained, and the motor 1 is also configured to shut off the power supply when overheated by the thermal relay 49. The three-phase alternating current power source is down to 115 volts from 480 volts through down transformer T0 and is supplied as the driving power of the driving relay unit, and is connected to the operation panel 3 and connected in parallel with the test circuit of the present invention. (Input stage) (H1, H2) (P3, P7, P17, P18, P22) and by a switch (contact) 49a that is crossed when a downed alternating current is applied and the thermal relay 49 is driven. When the coil 49X to be excited and the local valve are in the open state (when Open Maintained is present in the operation panel 3), and the coil 42-OO that is excited in the cross state (in the operation panel 3) Coil 42-CC that is excited when a command (Close Maintained) is provided, a switch TS-17 and a limit switch (contact point) LS-1 that are turned on when the coil 42-CC is excited, and The limit switch LS-5 and the switch TS-18, which are turned on when the coil 42-OO is excited, and the thermal relay 49 may be overheated by the motor 1. The contact 49a is crossed to the drive, and the contact 49X-b and 49X-a in which the open and cross states change depending on whether the coil 49X is excited by receiving a down AC power supply and the contact LS-7 cross each other. Open state recognition lamp (R) which lights up when the sensor is turned on, lamp (G) which lights when the contact (LS-3) crosses, lamp (O) which turns on when the valve is in error operation, and full open Switch (contact) that notifies the switchboard (3) the status of the contact (LS-2) and the full close state to the output terminal (H1) from the switchboard (operation panel) 3 to the output terminal (H1) ( LS-6). (TH) and (OL) are the contacts which cross when overheating in the motor 1.

The present invention configured as described above connects the test circuit 10 of the present invention as shown in FIG. 2 in parallel to the connection portion with the operation panel 3 in the state of FIG. 1. In this state, it demonstrates including a 4 degree structure based on FIG. When the switch unit 11 is positioned in the open state, the drive relay 4 forms an open contact and outputs 110 volts of AC power to the output terminal P7. Therefore, the measurer knows whether the drive relay 4 remains open by whether the open lamp unit 12 is turned on by the operation of the switch unit 11 which has been opened regardless of the control signal of the operation panel 3. To help. That is, the present invention places the switch unit 11 in the open state so that an effect such as giving a command to open the valve through the operation panel 3 can be obtained. Then, when the corresponding coil 42-OO is excited through the switch TS-8 and the lamp R is abnormal, the open lamp 12 is provided by supplying power to the open lamp unit 12 through the output terminal P7. -1) to turn on. At this time, the open lamp unit 12 is secondly decompressed (preferably 3 volts) through the first transformer T1 to function to turn on the open lamp 12-1, thereby extending the life of the open lamp 12-1. can do. It can be seen that the drive relay 4 is driven as shown in FIG. 4. First, the motor 1 having a local valve function is not shown in FIG. 3, but the contact 42-O and 42-C are selected. It is made to control the forward and reverse rotation of the motor (1). In this state, when the Open Maintained command is received from the operation panel 3 (the valve position is to be opened because the cross valve is to be opened), the initial state at this time is that the switch (TS-18) is closed. Since the contact LS-5 is also closed, the coil OPEN 42-OO is excited to open the contact 42-01, and the contact 42-O located at the top of the 480 volt drive motor 1. Since the motor is closed, the motor 1 rotates forward to drive the valve in the open state. At this time, the magnetic contactor contacts 42-C and 42-O are electrically and mechanically interlocked so that open and cross states do not occur simultaneously. Regardless of the test, the contact relay (LS-5) of the drive relay circuit is opened as soon as the valve is out of the cross position, and the coil (42-OO) is continuously excited through the switch (TS-18). LS-2) is crossed to provide a full open signal to the control panel 3 to open the open maintained.

On the other hand, when the switch unit 11 is placed in a cross state, a cross command is provided to the drive relay 4 through the input terminal P17, and accordingly, a cross command is provided to the primary side of the second transformer T2 through the output terminal P3. 110 volt DC power is output. This is depressurized (preferably 3 volts) through the second transformer T2 to turn on the cross lamp 12-1. Therefore, the life of the cross lamp 13-1 can be extended. Of course, the driving relay 4 circuit at this time functions as opposed to the open time by the action of the coil 42-CC operating in the cross state and the contact 42-C interlocked with it as shown in FIG. It can be seen that the lamp G is turned on. In order to understand the cross function, the drive relay 4 circuit itself connected to the operation panel 3 will be described. When the control panel 3 commands the closed maintained command, the switch LS-3 and the contact point ( LS-1) is in a cross state (in this case, the switch LS-3 and the contact LS-1 are in parallel because the switch (TS-17) operates when the motor is loaded when the motor is first started. Since it can be opened, the motor is continuously operated by the contact LS-1 (while the contact LS-1 is closed). Therefore, the coil 42-CC is excited and the contact 42-C on the upper part of the motor 1 is closed so that the motor 1 rotates in reverse. (The rotation of the motor is reversed by changing only two phases of the three-phase connection.) Rotates). When the coil 42-CC is excited and crossed, the switch LS-6 operates to send a signal to the operation panel 3 to cause the operation panel 4 to command (open close contact) to the coil 42-C. To stop the motor 1. Therefore, the cross command of the present invention, in order to obtain the effect of commanding the close command (Close Maintained) on the control panel 3, if the switch unit 11 is selected in the cross state (Close), the coil 42 through the input terminal (P17) -C) is excited (i.e., gives the same effect as having a closed maintained from control panel 3). Then, a loop is formed to the output terminal P3 through the lamp G so that the cross lamp 13-1 of the cross lamp unit 13 is lit.

On the other hand, even when the switch section 11 remains open and cross, if the driving relay 4 does not operate, power is applied to the failure display lamp section 14 through the output terminal P22. Then, the relay 14-2 is driven so that the contact is turned on so that the fault display lamp 14-1 is turned on through the third transformer T3. ) Causes overheating due to malfunction (which causes the motor to continue to rotate if it is kept open and keeps crossing state), which causes the thermal relay 49 to be operated by heat to drive the contact 49a. This causes the coil 49X to be excited to open the contact 49X-b to cut off the circuit to forcibly stop the driving of the motor 1. At this time, the contact 49X-a is crossed to the ramp ( The contact TH and OL are crossed at the time of overheating in the motor 1. Therefore, the present invention provides a contact 49X− when the circuit of the drive relay 4 and / or the motor 1 is abnormal. b) is opened to stop the circuit function and contact (49X-a, TH, OL) ) Is crossed to provide an alternating voltage (115 volts) to the output terminal (P22) to excite the relay (14-2) of the test circuit (10) of the present invention, which is caused by a fault indication lamp (14-) through the transformer (T3). 1) lights up.

Since the decompression voltage through the transformers T1-T3 is applied to each lamp unit 12, 13, 14 constituting the test circuit 10, each lamp 12-1, 13-1, 14-1 is Since the current at the time of lighting is small, it can maintain long life, and power consumption can also be reduced. In addition, the state of the local valve (2) can be grasped through the test circuit (10), so there is no need to contact the operating panel separately, and thus can be conveniently checked.

The present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have

As described above, when the local valve driven by the operation panel is checked, the lamp corresponding to the operation state of the local valve by the test circuit is turned on by connecting the test circuit in parallel to the connection portion between the local valve and the operation panel. As it can be seen immediately, it is possible to immediately check whether the local valve is abnormal, shorten the maintenance time, and there is no need to check the operation panel side and operation separately during maintenance.

Claims (1)

In the local valve (2) connected to the main operation panel of the power plant and driven by the open and cross command from the operation panel, the test circuit 10 is connected in parallel to the connection line between the local valve and the operation panel, The test circuit 10 provides a command corresponding to the command on the operation panel, the switch unit 11 having open and cross states to drive the drive relay 4, and when the switch unit 11 instructs to open. When the coil of the drive relay 4 is in normal operation, the open lamp unit 12 connected to the drive relay 4 so that the open lamp 12-1 is turned on, and the cross lamp (when the switch unit 11 is in the cross state) 13-1) is provided with a cross lamp unit 13 connected to the drive relay 4 so that the light is turned on, and a contact output for driving during abnormal operation of the drive relay 4 when the switch unit 11 is operated is displayed. A generator control local valve test circuit comprising a failure indication lamp unit (14) for driving a lamp (14-1).