JPS5921595Y2 - Selection circuit for remote monitoring and control equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a selection circuit for a remote monitoring and control device.

FIG. 1 shows a configuration of this type of device on the controlled side, where 1 is an FS receiving circuit, 2 is an input circuit, 3 is a waveform discrimination circuit, 4 is a register circuit, 5 is a verification circuit, 6 is an AND circuit, 7 is a decoding circuit, and 8 is an output circuit.

In the control center, the selection control signal is inputted to the encoding circuit by operating the selection control switch, and code conversion is performed.

This code is sampled by a scanning signal from a scanning circuit, and is sent out to a transmission path as a long/short code, for example, through a transmission gate circuit.

In the controlled station, in response to this, the waveform discrimination circuit 3 discriminates the length of the code and stores it in the register circuit 4.

Then, after performing a verification test and a constant mark test on this received signal, it is outputted to a controlled device via a decoding circuit 7 and an output circuit 8.

FIG. 2 shows a specific circuit configuration of the decoding circuit 7 and output circuit 8 in FIG. 1, where A is a selection code relay and A is its encoding circuit.

Now, if you select No. 11 of the controlled equipment (for example, a circuit breaker) at the control station, one of the selection code relays
Relays 10 and OO at position 0 operate and their contacts 10 and 00
is closed, and encoded auxiliary relay G1 operates.

At the same time, relays 1 and 0 of the first-ranked relays are operated, their contacts 1 and 0 are closed, and the selection relay pH is operated by contact G1 of relay G1.

The operation of the selection relay pH closes its contacts (not shown), and the selection of the breaker, which is the controlled device, is completed via the output circuit 8 of FIG.

The selection relay P11 is configured to be self-held by the contact P11 for a certain period of time during which the control command is issued via the contact LK which is switched just before the control command is issued to the device.

In addition to the self-holding contact pH, the selection relays P11 to P100 require at least six contacts, one contact each for the closing circuit, open circuit, and telemeter circuit, and two contacts for the multiple selection detection circuit.

Therefore, a small relay with 5 or less contacts cannot be used, and a large relay with 12 contacts has to be used, resulting in a large installation space.

Taking the above points into consideration, the present invention does not provide a self-holding circuit for each selection relay, but instead provides a self-holding circuit for the encoding auxiliary relay.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

Note that the same reference numerals as in FIG. 2 indicate the same parts.

In Figure 3, 70.40...00 and 7,
4...O is each contact of the selection code relay shown in Figure 2 A, 70X, 40X...OOX and 7
X, 4X...OX is encoding auxiliary relay, 70X
, 40X...00X and 7X, 4X...
・OX is its self-holding contact.

In FIG. 4, pH, PI3. P13...P
loo is a selection relay.

Therefore, if you select No. 12 of the controlled equipment (for example, a circuit breaker) at the Interest Palace, relays 10 and OO, which are the 10th among the selection code relays, operate and their contacts 10
and 00 are closed, and the encoding auxiliary relays 10X and OOX operate.

At the same time, relays 2 and 5 of the first-place relays operate, and their contacts 2 and 0 close, and coding auxiliary relays 2X and OX operate.

Therefore, the contacts 10X and OOX and 2X and OX shown in Fig.
When X closes, selection relay P12 operates.

The operation of the selection relay P12 closes its contacts (not shown), and the selection of the breaker, which is the controlled device, is completed through the output circuit shown in FIG.

Here, the encoding auxiliary relay 10X, 00 in FIG.
X, 2X, and OX are self-held by contacts 10 LK switches and contact 10.
00 and 2. Coding auxiliary relay 1 is activated by opening O.
0X, 00X and 2X, OX return.

Therefore, selection relay P12 also returns and the selection is canceled.

Note that D in the figure is a diode for preventing continuous flow.

As described above, according to the present invention, since the coding auxiliary relay is provided with a self-holding circuit, the selection relay requires one less contact than the conventional one.

This is because a selection relay requires at least 6 contacts, so conventionally a relay with 12 contacts was used for one coil, so the remaining 6 contacts were meaningless.

According to the present invention, only five contacts are required for the selection relay, so two coils are integrated, and a small relay with five contacts in each coil can be used, so the installation space is half that of the conventional one.

In addition, in the past, the self-holding contacts of each selection relay were connected in series, which made wiring work complicated, but the self-holding contacts of the present invention can each be connected to a common bus bar. Previously, the selection relay was operated by a series contact circuit of a coding auxiliary relay, but in this case, it can be configured with a series contact circuit of only a coding auxiliary relay, making the wiring work easier and reducing the wiring length. be effective.

[Brief explanation of the drawing]

Fig. 1 is a simplified block diagram showing the configuration of the controlled station, and Fig. 2 shows a specific example of the decoding circuit and output circuit in Fig. 1. 3
FIG. 4 shows an encoding auxiliary relay circuit and an encoding circuit showing an embodiment of the present invention. 70~00, 7~0...Selection code relay, 70
X-00X, 7X~OX... Encoding auxiliary relay, pH~P100... Selection relay, LK...
...Switching contact.

Claims (1)

[Scope of utility model registration request] It consists of a selection code relay that operates when a device to be controlled is selected, a coding auxiliary relay that operates according to the operation of this selection code relay, and a selection relay that operates according to the operation of this coding auxiliary relay, and the coding auxiliary relay operates when the device is selected. The selection relay is connected to the power supply through a series circuit of a switching contact that switches just before issuing a control command and a contact of the selection code relay, and is also connected to the switching contact via a self-contact, and the selection relay is connected to the coded auxiliary relay. A selection circuit for a remote monitoring and control device, which is connected to a power source through a series contact circuit, and is configured to hold the encoded auxiliary relay by a self-contact for a certain period of time when a control command is issued.