CN215646137U - Relay protection device switch output signal monitoring system - Google Patents
Relay protection device switch output signal monitoring system Download PDFInfo
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- CN215646137U CN215646137U CN202121878973.7U CN202121878973U CN215646137U CN 215646137 U CN215646137 U CN 215646137U CN 202121878973 U CN202121878973 U CN 202121878973U CN 215646137 U CN215646137 U CN 215646137U
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Abstract
The utility model relates to a relay protection device switch output signal monitoring system, which adopts a magnetic latching relay to monitor the switch output signal of a relay protection device, utilizes the characteristic that an outlet node can keep a closed state after an action voltage is applied to the magnetic latching relay, realizes effective monitoring on abnormal closing of the relay protection device switch output node, can drive a luminous LED to display after the node of the magnetic latching relay is closed, realizes real-time display on a monitoring result, solves the problem that the short-time abnormal closing of the relay protection device switch output signal cannot be identified in the prior art, and improves the reliability of monitoring on the relay protection device switch output signal.
Description
Technical Field
The utility model relates to the technical field of monitoring of relay protection devices of power systems, in particular to a switch output signal monitoring system of a relay protection device.
Background
In the prior art, the switch output signal monitoring of the relay protection device usually adopts an LED switch output monitoring box or a buzzer monitoring tool mode, and the two modes have the following disadvantages: both monitoring tools can only monitor if the switch outlet is closed for a long time. The time from the issuing of the protection operation command to the exit operation of the relay protection device is generally 20ms or more. If the short-time closing of less than 1 second occurs at the exit node, the two monitoring tools cannot effectively monitor the switch output signal of the relay protection device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a relay protection device switch output signal monitoring system, which monitors the switch output signal of a relay protection device through a magnetic latching relay, and realizes effective monitoring on abnormal closing of the switch output node of the relay protection device by utilizing the characteristic that an outlet node can keep a closed state after the magnetic latching relay applies an action voltage, thereby improving the reliability of monitoring the switch output signal of the relay protection device.
In order to achieve the above object, according to one aspect of the present invention, there is provided a relay protection device switch output signal monitoring system, comprising a power module, a switch output signal monitoring module, and an output display module; wherein the content of the first and second substances,
the input end of the power supply module is connected with an alternating current power supply, and the output end of the power supply module is respectively connected with the switch output signal monitoring module and the output display module so as to provide direct current power supply voltage;
the switch output signal monitoring module is connected with a switch output node of the relay protection device, receives a switch output signal of the relay protection device and monitors the switch output signal;
the output display module is connected with the output end of the switch output signal monitoring module and displays alarm information when the switch output node is closed.
Further, the output end of the power supply module comprises a first output end and a second output end;
the first output end is connected with the switch output signal monitoring module;
the second output end is connected with the output display module;
the direct current supply voltages output by the first output end and the second output end are different.
Further, the power module includes an AC/DC conversion unit, a first DC/DC conversion unit, and a second DC/DC conversion unit;
the input end of the AC/DC conversion unit is connected with an alternating current power supply, converts the alternating current power supply into a direct current signal and outputs the direct current signal to the first DC/DC conversion unit and the second DC/DC conversion unit;
the first DC/DC conversion unit and the second DC/DC conversion unit respectively convert the direct current signal into different first direct current supply voltage and second direct current supply voltage for output.
Further, the switch output signal monitoring module comprises a magnetic latching relay, and a switch output node of the relay protection device is connected with an action voltage input contact of the magnetic latching relay.
Further, the positive pole of the first dc supply voltage is connected to the first operating voltage input contact of the magnetic latching relay, and the negative pole is connected to the first operating voltage input contact.
Further, the output display module comprises a light emitting diode and a first resistor;
the anode of the light-emitting diode is connected with a first magnetic latching contact terminal of the magnetic latching relay, and the cathode of the light-emitting diode is connected with the anode of a second power supply voltage through a first resistor; the negative pole of the second supply voltage is connected to the second magnetically held contact terminal of the magnetically held relay.
In summary, the present invention provides a relay protection device switch output signal monitoring system, which uses a magnetic latching relay to monitor the switch output signal of the relay protection device, and utilizes the characteristic that an outlet node can keep a closed state after an action voltage is applied to the magnetic latching relay, so as to realize effective monitoring of abnormal closing of the relay protection device switch output node, and can drive a light emitting LED to display after the node of the magnetic latching relay is closed, so as to realize real-time display of a monitoring result, solve the problem that the short-time abnormal closing of the relay protection device switch output signal cannot be identified in the prior art, and improve the reliability of monitoring of the relay protection device switch output signal.
Drawings
FIG. 1 is a block diagram showing a system for monitoring a switch output signal of a relay protection device according to the present invention;
FIG. 2 is a schematic circuit diagram of a monitoring system for the switch output signal of the relay protection device according to the present invention;
fig. 3 is a schematic circuit wiring diagram of a magnetic latching relay.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The utility model provides a relay protection device switch output signal monitoring system, the block diagram of which is shown in figure 1, and the system comprises a power supply module, a switch output signal monitoring module and an output display module. Fig. 2 shows a schematic circuit diagram of a monitoring system for a switch output signal of a relay protection device, which is described in detail below with reference to fig. 1 and 2.
The input end of the power supply module is connected with an alternating current power supply, and the output end of the power supply module is respectively connected with the switch output signal monitoring module and the output display module so as to provide direct current power supply voltage. The power supply module is used for converting an alternating current power supply into direct current power supply voltage to supply power to each module in the system. The output end of the power supply module comprises a first output end and a second output end, the first output end is connected with the switch output signal monitoring module, the second output end is connected with the output display module, and the direct current supply voltages output by the first output end and the second output end are different. The power supply module comprises an AC/DC conversion unit, a first path of DC/DC-24V conversion unit and a second path of DC/DC-5V conversion unit, wherein the input end of the AC/DC conversion unit is connected with an alternating current power supply, converts the alternating current power supply into a direct current signal and outputs the direct current signal to the first path of DC/DC-24V conversion unit and the second path of DC/DC-5V conversion unit; the first path of DC/DC-24V conversion unit and the second path of DC/DC-5V conversion unit respectively convert the direct current signals into different first direct current supply voltage and second direct current supply voltage for output. The AC/DC conversion unit includes, for example, a filter circuit and a rectifier circuit, and the first path of DC/DC-24V conversion unit and the second path of DC/DC-5V conversion unit may include a voltage stabilizing circuit, a negative feedback circuit, and the like. The first dc supply voltage is, for example, 24V and the second supply voltage is, for example, 5V.
The switch output signal monitoring module is connected with a switch output node of the relay protection device, receives the switch output signal and monitors the switch output signal. The switch output signal monitoring module may be, for example, a magnetic latching relay, and a circuit wiring schematic diagram of the magnetic latching relay is shown in fig. 3, and includes terminals 1 and 16 as an operation voltage input circuit, terminals 2 and 15 as a return voltage input circuit, and terminals 5, 8, 9 and 12 as two pairs of magnetic latching contacts, respectively, for monitoring a switch output signal of the relay protection device. The relay protection device has a switch output node connecting the positive pole of the first DC supply voltage (DC24V +) to terminal 1 of the magnetic latching relay and a negative pole of the first DC supply voltage (DC24V-) to terminal 16 of the magnetic latching relay. In the embodiment, the characteristic that the outlet node can be kept in a closed state after the action voltage is applied to the magnetic latching relay and is recovered to an open state only after the action voltage is reset is utilized, the switch output node of the relay protection device is connected to the input loop of the magnetic latching relay, the magnetic latching relay obtains the input voltage after the open node is closed for a short time, and the node of the magnetic latching relay keeps the closed state, so that the monitoring function of the open node of the relay protection device is realized, the short-time abnormal closing condition of the open node of the relay protection device can be found in time, and the reliability is higher. The switch output signal monitoring module may include a plurality of magnetic latching relays to monitor the switch signal states of the plurality of switch output nodes. Since the operation time of the magnetic latching relay is about 5ms, the monitoring system of the present embodiment can effectively monitor abnormal closing of the open node for not less than 5 ms. And after the node of the magnetic latching relay is closed, the luminous LED can be driven to display.
The output display module is connected with the output end of the switch output signal monitoring module and displays the alarm information when the switch output node is closed. The output display module may comprise, for example, a light emitting diode having an anode connected to the terminal 8 of the magnetic latching relay and a cathode connected to the positive terminal of the second supply voltage via a first resistor; the negative pole of the second supply voltage is connected to terminal 5 of the magnetic latching relay. When the magnetic latching relay operates, the connected magnetic latching contact terminals 5 and 8 are closed, so that the circuit of the output display module is turned on, and the light emitting diode is lit, indicating that an abnormal closing operation has occurred. For the switching signal states of the plurality of switching output nodes, a plurality of groups of light emitting diodes and first resistors can be arranged in the output display module to display different switching output node states.
The system is provided with a reset module which can be a hand-dialing switch for example, so as to carry out unified reset on the magnetic latching relays. The dip switch is located between the first DC supply voltage positive pole (DC24V +) and the magnetically held relay terminal 2. After the dial switch is closed, 24V direct current voltage exists between the terminals 2 and 15, the magnetic latching relay is reset, the terminals 8 and 9 keep the nodes open, and the monitoring state is reset.
In summary, the present invention provides a relay protection device switch output signal monitoring system, which uses a magnetic latching relay to monitor the switch output signal of the relay protection device, and utilizes the characteristic that an outlet node can keep a closed state after an action voltage is applied to the magnetic latching relay, so as to realize effective monitoring of abnormal closing of the relay protection device switch output node, and can drive a light emitting LED to display after the node of the magnetic latching relay is closed, so as to realize real-time display of a monitoring result, solve the problem that the short-time abnormal closing of the relay protection device switch output signal cannot be identified in the prior art, and improve the reliability of monitoring of the relay protection device switch output signal.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (6)
1. A relay protection device switch output signal monitoring system is characterized by comprising a power supply module, a switch output signal monitoring module and an output display module; wherein the content of the first and second substances,
the input end of the power supply module is connected with an alternating current power supply, and the output end of the power supply module is respectively connected with the switch output signal monitoring module and the output display module so as to provide direct current power supply voltage;
the switch output signal monitoring module is connected with a switch output node of the relay protection device, receives a switch output signal of the relay protection device and monitors the switch output signal;
the output display module is connected with the output end of the switch output signal monitoring module and displays alarm information when the switch output node is closed.
2. The system of claim 1, wherein the output of the power module comprises a first output and a second output;
the first output end is connected with the switch output signal monitoring module;
the second output end is connected with the output display module;
the direct current supply voltages output by the first output end and the second output end are different.
3. The system of claim 2, wherein the power module comprises an AC/DC conversion unit, a first DC/DC conversion unit, and a second DC/DC conversion unit;
the input end of the AC/DC conversion unit is connected with an alternating current power supply, converts the alternating current power supply into a direct current signal and outputs the direct current signal to the first DC/DC conversion unit and the second DC/DC conversion unit;
the first DC/DC conversion unit and the second DC/DC conversion unit respectively convert the direct current signal into different first direct current supply voltage and second direct current supply voltage for output.
4. The system of claim 3, wherein the switch output signal monitoring module comprises a magnetic latching relay, and a switch output node of the relay protection device is connected to an operating voltage input contact of the magnetic latching relay.
5. The system of claim 4, wherein the first DC supply voltage has a positive terminal connected to the first operating voltage input contact of the magnetic latching relay and a negative terminal connected to the first operating voltage input contact.
6. The system of claim 5, wherein the output display module comprises a light emitting diode and a first resistor;
the anode of the light-emitting diode is connected with a first magnetic latching contact terminal of the magnetic latching relay, and the cathode of the light-emitting diode is connected with the anode of a second power supply voltage through a first resistor; the negative pole of the second supply voltage is connected to the second magnetically held contact terminal of the magnetically held relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121878973.7U CN215646137U (en) | 2021-08-12 | 2021-08-12 | Relay protection device switch output signal monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121878973.7U CN215646137U (en) | 2021-08-12 | 2021-08-12 | Relay protection device switch output signal monitoring system |
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| Publication Number | Publication Date |
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| CN215646137U true CN215646137U (en) | 2022-01-25 |
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| CN202121878973.7U Active CN215646137U (en) | 2021-08-12 | 2021-08-12 | Relay protection device switch output signal monitoring system |
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- 2021-08-12 CN CN202121878973.7U patent/CN215646137U/en active Active
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