JPS5990485A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To protect an internal circuit in a station to be controlled remotely from noise such as external surge by simple operation from a controlling station side, by deenergizing a power supply of the internal circuit for communication installed in the station to be controlled by means of relay contacts and controlling input/output signals by the internal circuit for communication so as to interrupt the transmission and receiving. CONSTITUTION:Suppose that a weather condition accompanying thunder takes place. In this weather condition, an indirect lightning stroke is generated attended with thunder clouds, and an hazard of an abnormal high voltage may invade into the internal circuit of the controller 1 to be monitored remotely. In opening a switch S2 at the control station, relays K1, K2 are restored at the station to be controlled. Then, contacts K11, K12 and K21, K22, K23, K24 are all opened, the power supply from a power supply circuit 11 is disconnected and the introduction of each input signal from input terminals 3a, 4a, 5a is blocked and the output of output signals from an output terminal 6a is stopped. Thus, high voltage noise possibly invading from the input terminals 3a, 4a, 5a, the output terminal 6a and the power supply terminals L1, L2 is interrupted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed monitoring and control system for protecting internal circuits in a remote controlled station from noise.

Conventionally, this type of distant monitoring sidekick was performed as Vi Fig. 1 (=
There was something to show. In the figure, 1 is a speed monitoring and control pedestal installed on the controlled side, and 2 is a pedestal installed on the Fi control center side.
remote monitoring control 1ffi, 3 is analog signal input device,
4 is a pulse signal input device, 5 is a display signal input device, 6 is a TJ control control ratio device, 7 is a PS converter, 8 is a SP toilet, 9 is a modulator, 10 is a power adjuster, 11 is a power supply circuit, T1fl hybrid coil, T, J repeater transformer, tl, t2
The t6 communication line is indicated by -tn.

With such a configuration (:), the remote monitoring and control equipment 1 normally receives analog signals, pulse signals, and display signals (through the n-1 input terminals 3a, 4a, 5a, the analog signal input device 3, the pulse signal The input device 4, the display signal input device 5 (two people), then the PS converter 7 and the modulator 9 are used to convert the signal.
, hybrid transformer T1, repeater transformer T2
The data are transferred to the remote monitoring and control device 2 through communication lines 11 and 12. The control signal transmitted from the remote monitoring and control device 2 is outputted to the output terminal 6a through the demodulator 10, the SP converter 8, and the control signal output device 6. The power supply circuit 11 includes input devices 3, 4, 5 . In addition to supplying gravity to the internal circuits such as the output device 6 and converters 7 and 8, it is always operated by receiving lightning from the terminals L□ and L2.

Since the conventional remote control system is configured in this way, the power supply line and input/output signal line are always connected to the internal circuit at the controlled station, and as a result, induced lightning, etc. (=
If a larger 11-year-old bomb invaded from the outside, it could not be prevented by lightning arresters, etc., and could even damage the internal circuits and arresters.

This invention was made in order to eliminate the above-mentioned drawbacks, and it is possible to control foreign yardage tJ by simple operation from the control center side.
It is an object of the present invention to provide a remote monitoring control 91 that protects internal circuits in a remote control target from any noise.

Hereinafter, one embodiment of the present invention will be explained with reference to two figures C. Figure 2 (= In Figure 1, the same numbers as in Figure 1 indicate the same or equivalent parts, so the explanation will be omitted. In the figure, the rebeat transformer T has an output @ll coil divided into two. It is a Levit transformer.E2tl power supply and communication line 11
．． A blood flow voltage is applied to 12. C1, C2 #'1 AC signal bypass capacitor, Sl is the switch to turn on and off the Ff'Jm power supply, K1 is the relay terminal, and kll
' k12 indicates the contact point of (.

'F6 to 2 is a relay for input/output signal on/off, and -k21°k2□ek23+2qt'i'n also indicates its contact point.

In such 'fx 1j4 H, if this remote monitoring and control device is normally controlling the monitoring operation, the switch S1 of the remote monitoring and control device 2 on the control center side is closed.

Since the top current voltage is applied to the communication lines t□ and t2, the relay □ in the remote monitoring and control robe 1 on the controlled station side is activated. For this reason, □+k is applied to the contact point of remote monitoring control system 1.
When 2 is closed, the input/output signal on/off relay is energized (2 power supply circuits 11 are also energized, the log signal input device 3, the pulse signal input device 4, and the display signal input device 5, Control signal output device 6° converter 7.8% modulator 9, Adjuster 11
Power is supplied to all of the At this time, 21° k 22 m k 25 r k 2 w at the contact point of □ on the relay,
are all closed, and input terminal 3a.

From 4a and 5a, 7n analog signals, pulse signals,
When the display signal is inputted, a control signal is output from the output terminal 6a, and normal operation is ensured.

However, the next time there is lightning, I will be thirsty. At tJ in this meteorological situation, induced lightning occurs as the thundercloud approaches, and the internal circuit in the remote monitoring and control system 1 (
- Risk of abnormally high pressure entering. At this time, when switch S2 is opened on the control center side, relays □ and 2 are returned to relay E on the controlled station side. Then, 1□ at the contact point,
12 to 211 to 221 to 251 to 211 to contact point
are all opened 1, the power supply from the illumination circuit 11 is cut off 1, the introduction of each input signal from the input terminals 3a+4a and 5a is blocked 1, and the output of the output signal from the output terminal 6a is also stopped.

Therefore, input terminal 31L * 4 a # 5 a s
Output terminals 6a1, r and power supply terminal L1. High voltage miscellaneous components that may enter from L2 are blocked.

As described above, according to the present invention, the controlled Fg! Since the power supply and the signal input/output terminal section of the remote monitoring control device on the side can be controlled on and off, there is a possibility that the power consumption can be reduced by cutting off the power supply during the low heat tJ period.

[Brief explanation of the drawing]

Figure 1 is a system diagram of a conventional remote monitoring and control system, and Figure 2 is a system diagram of a conventional remote monitoring and control system.
A system diagram of a remote monitoring and control system according to an embodiment of the present invention is shown. 1... Distant monitoring and control equipment; 2... Remote monitoring and control equipment; 3: Analog signal input device; 4... Pulse signal input device, 5... Display signal input device, 6... Control signal output device, 7... PS converter, 8... SP converter, 9...
...Modulation, 10...Demodulator, 11...'li offshore circuit, T1-...Hybrid transformer, T2. T...
・Repeater transformer, 11.12...communication line, C1
, C2...Condenya. K□eK2...Relay, ni1□, nikko,...contact -
to 21+ to 221 to 231 to 211...contact, S□・
・・Switch, K2・−・Blood flow power supply. In addition, the same shrine number in the figure indicates the same or equivalent part.

Claims (1)

[Claims] In a remote controlled station where signals are exchanged between the control center and a remote controlled station via a communication line, ,
In addition, the controlled FFIC: -t:n('r+drunken monk) is activated by the blood flow voltage, and the communication internal circuit installed in the controlled station is connected to the relay via the contact point of the relay. The remote control device is designed to turn off the power supply and cut off the transmission and reception of input/output signals to and from the communication internal circuit.