CN216310207U - Automatic checking device for high-power relay - Google Patents
Automatic checking device for high-power relay Download PDFInfo
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- CN216310207U CN216310207U CN202120692123.1U CN202120692123U CN216310207U CN 216310207 U CN216310207 U CN 216310207U CN 202120692123 U CN202120692123 U CN 202120692123U CN 216310207 U CN216310207 U CN 216310207U
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Abstract
An automatic checking device for a high-power relay comprises an alternating current/direct current power supply conversion module, wherein the alternating current/direct current power supply conversion module is electrically connected with a PLC (programmable logic controller), the PLC is electrically connected with a direct current output voltage regulator, the PLC is electrically connected with a human-computer interaction interface, the PLC is respectively and electrically connected with a current measuring module, a voltage measuring module and a resistance measuring module, and working power supplies of the current measuring module, the voltage measuring module and the resistance measuring module are provided by the alternating current/direct current power supply conversion module; the current measuring module, the voltage measuring module and the resistance measuring module are electrically connected with a high-power relay coil to be verified. When the device is used for checking the high-power relay, an operator can control the device to work through a human-computer interaction interface, the device can automatically adjust the voltage values applied to two ends of the high-power relay coil, and the voltage values, the current values, the resistance values and the resistance values of the auxiliary contacts of the coil are automatically measured.
Description
Technical Field
The utility model belongs to the field of calibration devices, and particularly relates to an automatic calibration device for a high-power relay.
Background
The high-power relay belongs to a relay used under a specific condition, is widely used for a direct tripping loop for microcomputer protection, and can effectively avoid the relay malfunction due to the fact that the tripping loop has a longer cable loop and a relatively larger capacitance and is easy to be interfered by external signals to cause the relay malfunction and the relay is exported, and the high-power relay with the action power of more than 5 watts is adopted. In order to ensure the reliability of a high-power relay, when power equipment is put into operation for the first time or relay protection is completely and partially checked, the high-power relay check must be carried out as a standard maintenance project, at present, a relay protection tester (which provides a direct-current power supply), at least two universal meters (which measure voltage values, current values and resistance values) and a plurality of test lines are mainly adopted in the high-power relay check method, two persons are required to cooperate to complete the relay check work, the action current only changes instantly, if an operator cannot accurately observe and record the action current in time, the high-power relay check work can be restarted, manpower and material resources are seriously occupied, and the maintenance period is influenced.
Disclosure of Invention
In view of the technical problems in the background art, the automatic checking device for the high-power relay provided by the utility model has the advantages that when the high-power relay is checked, an operator can control the device to work through the human-computer interaction interface, the device can automatically adjust the voltage value applied to two ends of the coil of the high-power relay, and the voltage value, the current value, the resistance value and the resistance value of the auxiliary contact of the coil can be automatically measured.
In order to solve the technical problems, the utility model adopts the following technical scheme to realize:
an automatic checking device for a high-power relay comprises an alternating current/direct current power supply conversion module, wherein the alternating current/direct current power supply conversion module is electrically connected with a PLC (programmable logic controller), the PLC is electrically connected with a direct current output voltage regulator, the PLC is electrically connected with a human-computer interaction interface, the PLC is respectively and electrically connected with a current measuring module, a voltage measuring module and a resistance measuring module, and working power supplies of the current measuring module, the voltage measuring module and the resistance measuring module are provided by the alternating current/direct current power supply conversion module; the current measuring module, the voltage measuring module and the resistance measuring module are electrically connected with a high-power relay coil to be verified;
the direct current output voltage regulator is used for being electrically connected with a coil of the high-power relay to be verified and providing driving voltage for the high-power relay to be verified;
the current measuring module is used for measuring the current of the high-power relay coil to be verified;
the voltage measuring module is used for measuring the voltage of the coil of the high-power relay to be verified;
the resistance measuring module is used for measuring the resistance of the coil and the auxiliary contact of the high-power relay to be verified.
In a preferable scheme, the voltage regulating range of the direct current output voltage regulator is 0-220V, and the direct current output voltage regulator, the human-computer interaction interface and the alternating current/direct current power supply conversion module are all used for being electrically connected with a 220V alternating current power supply.
In a preferable scheme, the current measuring module is a current transducer, and the current transducer is used for measuring the loop current of the high-power relay coil to be verified, converting the current value into a 4-20mA analog signal and transmitting the analog signal to the PLC.
In a preferable scheme, the voltage measuring module is a voltage transmitter, and the voltage transmitter is used for measuring the voltage of a coil loop of the high-power relay to be verified, converting the voltage value into a 4-20mA analog signal and transmitting the analog signal to the PLC.
In a preferable scheme, the resistance measuring module is further used for measuring the resistance of the coil and the auxiliary contact of the high-power relay to be verified, and converting the resistance value into a 4-20mA analog signal to be transmitted to the PLC.
In the preferred scheme, the PLC transmits the measurement parameters of the high-power relay to be verified to a human-computer interaction interface for display.
This patent can reach following beneficial effect:
1. the relay calibration work can be completed by one person, and additional work such as connection of external instruments and meters such as a universal meter, manual dosage of a relay protection tester, manual observation and recording of action current, calculation of action power and the like is omitted.
2. The calibration device is simple to operate, the working time and the personnel investment are greatly reduced, and the calibration work of the high-power relay is more efficient and reliable. The calculation and judgment of the action power and the output of the data report can be automatically completed, and the operator can also check the related data information through the human-computer interaction interface.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a block diagram of the present invention.
In the figure: 1-AC/DC power supply conversion module; 2-a direct current output voltage regulator; 3-PLC programmable controller; 4-a current measurement module; 5-a voltage measurement module; 6-a resistance measurement module; 7-human-computer interaction interface.
Detailed Description
The preferred scheme is as shown in fig. 1, the automatic checking device for the high-power relay comprises an alternating current/direct current power supply conversion module 1, wherein the alternating current/direct current power supply conversion module 1 is electrically connected with a PLC (programmable logic controller) 3, the PLC 3 is electrically connected with a direct current output voltage regulator 2, the PLC 3 is electrically connected with a human-computer interaction interface 7, the PLC 3 is respectively electrically connected with a current measurement module 4, a voltage measurement module 5 and a resistance measurement module 6, and working power supplies of the current measurement module 4, the voltage measurement module 5 and the resistance measurement module 6 are provided by the alternating current/direct current power supply conversion module 1; the current measuring module 4, the voltage measuring module 5 and the resistance measuring module 6 are used for being electrically connected with a high-power relay coil to be verified;
the direct current output voltage regulator 2 is used for being electrically connected with a coil of the high-power relay to be verified and providing driving voltage for the high-power relay to be verified;
the current measuring module 4 is used for measuring the current of the coil of the high-power relay to be verified, and preferably selects an MIK-DZI series single-phase current transducer with high corresponding speed and strong anti-interference performance;
the voltage measuring module 5 is used for measuring the voltage of a coil of the high-power relay to be verified, and preferably selects an MIK-DZU series single-phase voltage transmitter with high corresponding speed and strong anti-interference performance;
the resistance measuring module 6 is used for measuring the resistance of the coil and the auxiliary contact of the high-power relay to be verified, and preferably selects a DIN11-IBF-R series signal isolation converter with high corresponding speed and stable performance.
Further, the voltage regulating range of the direct current output voltage regulator 2 is 0-220V, and the direct current output voltage regulator 2, the human-computer interaction interface 7 and the alternating current/direct current power supply conversion module 1 are all used for being electrically connected with a 220V alternating current power supply.
The PLC 3 is electrically connected with the 0-220V direct current output voltage regulator 2, and the 0-220V direct current output voltage regulator 2 is controlled to output 0-220V continuous adjustable voltage by linearly outputting 4-20mA analog quantity.
Further, the current measuring module 4 is a current transmitter, and the current transmitter is used for measuring the loop current of the high-power relay coil to be verified, converting the current value into a 4-20mA analog signal and transmitting the analog signal to the PLC 3.
Further, the voltage measuring module 5 is a voltage transmitter, and the voltage transmitter is used for measuring the voltage of the coil loop of the high-power relay to be verified, converting the voltage value into a 4-20mA analog signal and transmitting the analog signal to the PLC 3.
Further, the resistance measuring module 6 is also used for measuring the resistance of the coil and the auxiliary contact of the high-power relay to be verified, and converting the resistance value into a 4-20mA analog signal to be transmitted to the PLC 3.
Further, the PLC 3 transmits the measurement parameters of the high-power relay to be verified to the human-computer interaction interface 7 for display.
The PLC 3 collects the output quantities of the current measuring module 4, the voltage measuring module 5 and the resistance measuring module 6, and judges whether the high-power relay meets the use requirement through logic operation. The PLC 3 is electrically connected with the human-computer interaction interface 7, so that an operator can control the PLC 3 and check and control data collected by the PLC 3 through the human-computer interaction interface 7. The human-computer interaction interface 7 can generate a high-power relay inspection report to be verified. The high-power relay calibration device is characterized in that test wire interfaces for externally connecting the high-power relay are all plug-in rubber heads.
The working principle is as follows:
1. and connecting the loop of the high-power relay coil to be verified and the auxiliary contact (or called contact) to an automatic verification device.
2. An external 220V alternating current power supply is connected, the automatic calibration device is checked to work normally, a coil and a contact resistance value of the high-power relay to be calibrated can be checked through the human-computer interaction interface 7, namely the coil and the contact resistance value before the high-power relay to be calibrated does not act, and the human-computer interaction interface 7 automatically prompts the condition that the high-power relay to be calibrated is ready to work.
3. Under the condition that the coil and the contact resistance value of the high-power relay to be verified are normal, an operator issues a relay verification start command through the human-computer interaction interface 7, and the 0-220V direct-current output voltage regulator 2 starts to gradually increase the output voltage from 0 to the coil of the high-power relay to be verified.
4. And the human-computer interaction interface 7 displays the voltage value and the current value of the coil loop of the high-power relay to be checked and the calculated power value in real time on a sampling interface.
5. When the resistance value of the contact of the high-power relay to be verified suddenly changes (the high-power relay acts), the current voltage value of the coil loop of the high-power relay is an action voltage value, the current value is an action current value, the calculated power value is an action power value, the resistance value of the contact is the resistance value of the contact after action, the human-computer interaction interface 7 automatically outputs and records the current value and the qualified condition of the high-power relay to be verified, and simultaneously the voltage output of the 0-220V direct current output voltage regulator 2 is automatically stopped.
6. And the operator generates a high-power relay inspection report to be verified through a man-machine interaction interface 7 by one key.
7. If any problem is found, the operator can issue a relay check stop order through the man-machine interaction interface 7 to stop the relay check work.
Logic design of a PLC 3:
1. comparing the resistance values of the coil and the contact before the high-power relay to be verified does not act with a preset value, if the resistance values are normal, outputting the high-power relay to be verified to be ready, and continuing the verification work; if the resistance value is abnormal, the output high-power relay to be verified is not ready, the verification work cannot be carried out continuously, and an operator is reminded that the high-power relay has quality problems or abnormal wiring.
2. After the high-power relay to be verified is ready to be in place, a relay verification start command issued by the human-computer interaction interface 7 can be received, the PLC 3 starts to linearly output 4-20mA, and the 0-220V direct-current output voltage regulator 2 is controlled to start to gradually increase output voltage from 0 to a coil of the high-power relay to be verified.
3. When the PLC 3 detects that the resistance value of the contact of the high-power relay to be verified suddenly changes (the high-power relay acts), the PLC 3 stops outputting the 4-20mA quantity, and records the current action voltage value, the action current value and the action power value. Comparing preset values: (1) the action voltage value is compared with a preset value (55% -70% of rated voltage), (2) the action power value is compared with the preset value (more than 5W), (3) the resistance values of the coil and the contact of the high-power relay to be verified after the action are compared with the preset value. If the comparison of the preset values is normal, outputting that the high-power relay to be verified is qualified; if any abnormal condition exists in the comparison of the preset values, the output high-power relay to be verified is unqualified.
The PLC 3 can receive a relay check stop command issued by the human-computer interaction interface 7 to forcibly stop the relay check.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.
Claims (6)
1. The utility model provides a high-power relay automatic check device, is connected its characterized in that including handing over/DC power supply conversion module (1), handing over/DC power supply conversion module (1) and PLC programmable controller (3) electricity, and PLC programmable controller (3) are connected with direct current output voltage regulator (2) electricity, and PLC programmable controller (3) are connected with human-computer interaction interface (7) electricity: the PLC (3) is respectively and electrically connected with the current measuring module (4), the voltage measuring module (5) and the resistance measuring module (6), and working power supplies of the current measuring module (4), the voltage measuring module (5) and the resistance measuring module (6) are provided by the AC/DC power supply conversion module (1); the current measuring module (4), the voltage measuring module (5) and the resistance measuring module (6) are electrically connected with a high-power relay coil to be verified;
the direct current output voltage regulator (2) is used for being electrically connected with a coil of the high-power relay to be verified and providing driving voltage for the high-power relay to be verified;
the current measuring module (4) is used for measuring the current of the high-power relay coil to be verified;
the voltage measuring module (5) is used for measuring the voltage of the high-power relay coil to be verified;
and the resistance measuring module (6) is used for measuring the resistance of the coil and the auxiliary contact of the high-power relay to be verified.
2. The high power relay automatic checking device according to claim 1, characterized in that: the voltage regulating range of the direct current output voltage regulator (2) is 0-220V, and the direct current output voltage regulator (2), the human-computer interaction interface (7) and the alternating current/direct current power supply conversion module (1) are all used for being electrically connected with a 220V alternating current power supply.
3. The high power relay automatic checking device according to claim 1, characterized in that: the current measuring module (4) is a current transducer which is used for measuring the loop current of the high-power relay coil to be verified and converting the current value into a 4-20mA analog signal to be transmitted to the PLC (3).
4. The high power relay automatic checking device according to claim 1, characterized in that: the voltage measuring module (5) is a voltage transmitter which is used for measuring the voltage of a coil loop of the high-power relay to be verified and converting the voltage value into a 4-20mA analog signal to be transmitted to the PLC (3).
5. The high power relay automatic checking device according to claim 1, characterized in that: the resistance measuring module (6) is also used for measuring the resistance of the coil and the auxiliary contact of the high-power relay to be verified, converting the resistance value into a 4-20mA analog signal and transmitting the analog signal to the PLC (3).
6. The high power relay automatic checking device according to claim 1, characterized in that: and the PLC (3) transmits the measurement parameters of the high-power relay to be verified to a human-computer interaction interface (7) for display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120692123.1U CN216310207U (en) | 2021-04-06 | 2021-04-06 | Automatic checking device for high-power relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120692123.1U CN216310207U (en) | 2021-04-06 | 2021-04-06 | Automatic checking device for high-power relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216310207U true CN216310207U (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120692123.1U Active CN216310207U (en) | 2021-04-06 | 2021-04-06 | Automatic checking device for high-power relay |
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| Country | Link |
|---|---|
| CN (1) | CN216310207U (en) |
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2021
- 2021-04-06 CN CN202120692123.1U patent/CN216310207U/en active Active
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