CN215494078U - Portable resistance tester calibration equipment - Google Patents
Portable resistance tester calibration equipment Download PDFInfo
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- CN215494078U CN215494078U CN202121267447.7U CN202121267447U CN215494078U CN 215494078 U CN215494078 U CN 215494078U CN 202121267447 U CN202121267447 U CN 202121267447U CN 215494078 U CN215494078 U CN 215494078U
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- 238000012795 verification Methods 0.000 claims description 44
- 238000012546 transfer Methods 0.000 claims description 28
- 238000005259 measurement Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a portable resistance tester calibration device, which comprises a selector switch, wherein the selector switch is used for switching resistance within the resistance value range of a plurality of gears and comprises 1 fixed contact and a plurality of sliding contacts, and each sliding contact corresponds to 1 switching gear; the switching device comprises a change-over switch, wherein the change-over switch is used for switching the serial connection state between the change-over switches, and the change-over switch is connected with the relay. The utility model can quickly and accurately verify the resistance tester.
Description
Technical Field
The utility model relates to a portable resistance tester calibration device.
Background
The grounding resistance value is the basis for measuring whether grounding is reliable, and good grounding measures can effectively prevent electrostatic induction and electromagnetic interference from damaging aerospace products, special equipment and precise electronic measuring instruments and play an important role in ensuring personal safety. The aerospace mission has strict technical requirements on grounding of special equipment and non-standard mechanical equipment in a launching field, the lightning protection grounding is less than 10 omega, the independent grounding is less than 4 omega, and the combined grounding is less than 1 omega. At present, a ZC-8 type ground resistance tester is mainly used for measuring the ground resistance of special equipment in an aerospace launching site, and the ground resistance of part of grounding devices is found to be abnormal in measurement, for example, the problems that 0.3 omega and 2.2 omega appear in a total grounding grid of a certain site, the grounding resistance of a lightning tower is 8.6 omega, 7.8 omega and 9.2 omega, the independent grounding of the certain site is more than 4 omega, the resistance of an independent grounding grid is larger and the like. The existing instrument equipment is difficult to quickly judge whether the ground resistance tester has the problem of measurement error or a grounding device on site, so that the fault judgment and elimination are not quick, and the task process is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a portable resistance tester calibration device and a calibration method, which can quickly and accurately calibrate a resistance tester.
The technical scheme for realizing the purpose of the utility model is as follows:
a portable resistance tester calibration device comprises a selector switch, wherein the selector switch is used for switching resistance within the resistance value range of a plurality of gears and comprises 1 fixed contact and a plurality of sliding contacts, each sliding contact corresponds to 1 switching gear, and the portable resistance tester calibration device is characterized by comprising a plurality of selector switches which are connected in series through the contacts of a relay; the switching device comprises a change-over switch, wherein the change-over switch is used for switching the serial connection state between the change-over switches, and the change-over switch is connected with the relay.
The resistance between the first resistance verification end and the second resistance verification end is a verification resistance, and the first resistance verification end and the second resistance verification end are respectively connected with the change-over switch.
Further, the device comprises 3 change-over switches including a first change-over switch (1), a second change-over switch (2) and a third change-over switch (3); comprises a first change-over switch (S1), a second change-over switch (S2) and 2 change-over switches.
Further, when the first change-over switch (S1) is in an open state, the first change-over switch (1) and the second change-over switch (2) are controlled to be connected in series; and when the second change-over switch (S2) is in an opening state, the second change-over switch (2) and the third change-over switch (3) are controlled to be connected in series.
Furthermore, the first transfer switch (S1) is connected with a first relay (KA1), and a normally open contact (KA 1-1) of the first relay (KA1) is connected between the sliding contact of the first transfer switch (1) and the fixed contact of the second transfer switch (2); a normally closed contact (KA 2-2) of a second relay (KA2) is connected between the fixed contact of the first change-over switch (1) and the first resistor verification end, and a normally closed contact (KA 2-3) of a second relay (KA2) is connected between the sliding contact of the second change-over switch (2) and the second resistor verification end.
Furthermore, the second transfer switch (S2) is connected with a second relay (KA2), and a normally open contact (KA 2-1) of the second relay (KA2) is connected between the sliding contact of the second transfer switch (2) and the fixed contact of the third transfer switch (3).
Furthermore, a parallel circuit formed by a normally open contact (KA 2-4) of a second relay (KA2) and a normally closed contact (KA 1-2) of a first relay (KA1) is connected between a fixed contact of the second change-over switch (1) and the first resistance verification end, and a sliding contact of the third change-over switch (2) is connected with the second resistance verification end.
Furthermore, a normally closed contact (KA 1-3) of a first relay (KA1) is connected between the sliding contact of the first change-over switch (1) and the second resistance verification end.
Furthermore, a normally closed contact (KA 1-4) of a first relay (KA1) is connected between the fixed contact of the third change-over switch (3) and the first resistance verification end.
Further, the first transfer switch (S1) is connected with the indicator lamps (VD1) and (VD2), and the second transfer switch (S2) is connected with the indicator lamp (VD 3).
The utility model has the following beneficial effects:
the utility model comprises a first change-over switch (1), a second change-over switch (2) and a third change-over switch (3), wherein the change-over switches are connected in series through contacts of a relay; each selector switch is used for switching the resistors within the ranges of 0.1-0.9 omega, 1-9 omega and 10-90 omega of the resistance value respectively; the switching device comprises a change-over switch, wherein the change-over switch is used for switching the serial connection state between the change-over switches, and the change-over switch is connected with the relay. The utility model switches the serial state between the change-over switches through the change-over switch, switches the change-over switches at different gears, thereby enabling the checking device to be in different resistance value states, compares the resistance test result of the resistance tester with the resistance value of the checking device, and can quickly and accurately check the resistance tester, thereby quickly analyzing and determining whether the resistance value is larger or smaller due to the influence caused by the self-measurement deviation of the grounding resistance tester or the influence caused by the self-damage of the grounding electrode. Aiming at the condition that the resistance value of the grounding resistor is increased during equipment state reexamination or technical safety inspection, the verification device can be used for quickly positioning the reason of the abnormal grounding resistor, effectively reducing the time of equipment reexamination and technical safety inspection, shortening the time of eliminating faults of working personnel and improving the working efficiency. The utility model is convenient to carry, and can be applied to the use of all the outdoor earthing device measuring instruments of the prior arrangement and the check of the indoor ETCR2000 pincerlike earthing resistance tester.
The utility model comprises a first change-over switch (S1), a second change-over switch (S2) and 2 change-over switches; when the first change-over switch (S1) is in an opening state, the first change-over switch (1) and the second change-over switch (2) are controlled to be connected in series; when the second change-over switch (S2) is in an opening state, the second change-over switch (2) and the third change-over switch (3) are controlled to be connected in series; the first transfer switch (S1) is connected with a first relay (KA1), and a normally open contact (KA 1-1) of the first relay (KA1) is connected between a sliding contact of the first transfer switch (1) and a fixed contact of the second transfer switch (2); a normally closed contact (KA 2-2) of a second relay (KA2) is connected between the fixed contact of the first change-over switch (1) and the first resistor verification end, and a normally closed contact (KA 2-3) of a second relay (KA2) is connected between the sliding contact of the second change-over switch (2) and the second resistor verification end; the second transfer switch (S2) is connected with a second relay (KA2), and a normally open contact (KA 2-1) of the second relay (KA2) is connected between a sliding contact of the second transfer switch (2) and a fixed contact of the third transfer switch (3); a parallel circuit formed by a normally open contact (KA 2-4) of a second relay (KA2) and a normally closed contact (KA 1-2) of a first relay (KA1) is connected between the fixed contact of the second change-over switch (1) and the first resistor verification end, and a sliding contact of the third change-over switch (2) is connected with the second resistor verification end; a normally closed contact (KA 1-3) of a first relay (KA1) is connected between the sliding contact of the first selector switch (1) and the second resistor verification end; and a normally closed contact (KA 1-4) of a first relay (KA1) is connected between the fixed contact of the third selector switch (3) and the first resistor verification end. The utility model further ensures convenient and reliable resistance value switching through the connection mode among the change-over switch, the relay contact and the relay contact.
The first transfer switch (S1) is connected with indicator lamps (VD1) and (VD2), and the second transfer switch (S2) is connected with indicator lamp (VD 3). When the change-over switches are in different series connection states, the corresponding indicator lamps are lightened, and the checking operation is further facilitated.
Drawings
FIG. 1 is a schematic diagram of a transfer switch control circuit of the present invention;
fig. 2 is a schematic diagram of a diverter switch circuit of the present invention.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
The switching device comprises a selector switch, wherein the selector switch is used for switching resistors within the resistance value range of a plurality of gears, the selector switch comprises 1 fixed contact and a plurality of sliding contacts, and each sliding contact corresponds to 1 switching gear, which is the prior art. As shown in fig. 2, the switching device comprises a first change-over switch 1, a second change-over switch 2 and a third change-over switch 3, wherein the change-over switches are connected in series through contacts of a relay; the first change-over switch 1, the second change-over switch 2 and the third change-over switch 3 are respectively and correspondingly used for changing over the resistors within the ranges of 0.1-0.9 omega, 1-9 omega and 10-90 omega of resistance values, and each change-over switch comprises 10 gears (including 0 gear). The circuit comprises a first resistance verifying end C1, a first resistance verifying end P1 and a second resistance verifying end C2P2, wherein the resistances between the first resistance verifying end C1, the first resistance verifying end P1 and the second resistance verifying end C2P2 are verifying resistances, and the first resistance verifying end C1, the first resistance verifying end P1 and the second resistance verifying end C2P2 are respectively connected with the change-over switch.
The switching device comprises a change-over switch, wherein the change-over switch is used for switching the serial connection state between the change-over switches, and the change-over switch is connected with the relay. As shown in fig. 1, includes a first transfer switch S1, a second transfer switch S2; when the first change-over switch S1 is in an open state, the first change-over switch 1 and the second change-over switch 2 are controlled to be connected in series; when the second changeover switch S2 is turned on, the second changeover switch 2 and the third changeover switch 3 are controlled to be connected in series.
As shown in fig. 1 and 2, the first transfer switch S1 is connected to the first relay KA1, and the normally open contact KA 1-1 of the first relay KA1 is connected between the sliding contact of the first transfer switch 1 and the fixed contact of the second transfer switch 2. Between the fixed contact of the first change-over switch 1 and the first resistance verification end C1, P1, a normally closed contact KA 2-2 of a second relay KA2 is connected, between the sliding contact of the second change-over switch 2 and the second resistance verification end C2P2, a normally closed contact KA 2-3 of a second relay KA2 is connected. The second change-over switch S2 is connected with a second relay KA2, and a normally open contact KA 2-1 of a second relay KA2 is connected between a sliding contact of the second change-over switch 2 and a fixed contact of the third change-over switch 3. A parallel circuit formed by a normally open contact KA 2-4 of a second relay KA2 and a normally closed contact KA 1-2 of a first relay KA1 is connected between a fixed contact of the second change-over switch 1 and the first resistance verification ends C1 and P1, and a sliding contact of the third change-over switch 2 is connected with the second resistance verification end C2P 2. A normally closed contact KA 1-3 of a first relay KA1 is connected between the sliding contact of the first change-over switch 1 and the second resistor verification end C2P 2; and a normally closed contact KA 1-4 of a first relay KA1 is connected between a fixed contact of the third change-over switch 3 and the first resistor verifying end C1 and P1.
As shown in fig. 1, the first switch S1 is connected to the indicator lamp VD1 through the normally closed contact S2-2 of the second switch S2, the resistor R1 is connected to the indicator lamp VD2 through the resistor R2, and the second switch S2 is connected to the indicator lamp VD3 through the resistor R3.
The change-over switch S1 is turned on (the normally open contact is conducted), the indicator lamps VD1 and VD2 are lighted, the first relay KA1 of the KA1 is electrified, the contact of the first relay KA1 acts, the fixed C contact of the change-over switch 1 is connected with the first resistance verification end C1 and P1 through the normally closed contact KA 2-2, the sliding contact is connected with the fixed contact of the change-over switch 2 through the normally open contact KA 1-1, and the sliding contact of the change-over switch 2 is connected with the second resistance verification end C2P2 through the normally closed contact KA 2-3, so that the change-over switch 1 and the change-over switch 2 are connected in series in resistance, and the resistance of 1.1-9.9 omega can be measured.
The change-over switch S2 is turned on (the normally open contact is conducted, the normally closed contact is disconnected), the indicator lamps VD2 and VD3 are lightened, the second relay KA2 is electrified, the contact of the second relay KA2 acts, the fixed contact of the change-over switch 2 is often opened from the contact KA 2-4 to the first resistance verification end C1 and P1, the sliding contact is from the normally open contact KA 2-1 to the fixed contact of the change-over switch 3, the sliding contact of the change-over switch 3 is connected to the second resistance verification end C2P2, the change-over switch 2 and the change-over switch 3 are connected in series in resistance, and the resistance of 11-99 omega can be measured.
And connecting the resistance tester with the checking device, enabling the checking device to be in different resistance values through the change-over switch and the change-over switch, and comparing the resistance test result of the resistance tester with the resistance value of the checking device.
During verification, the first resistor verifying ends C1 and P1 and the second resistor verifying end C2P2 of the verifying device are connected with the ends P1, C1, P2 and C2 corresponding to the grounding resistor tester, the panel of the change-over switch is marked with resistance values with different numerical values, and the corresponding change-over switch and the change-over switch are selected according to the resistance value of the verifying resistor.
If the 1.5 omega ground resistance is verified, firstly, the change-over switch S1 is turned on, and the resistors of the change-over switch 1 and the change-over switch 2 are in a serial state; and then rotating the selector switch 1 to 0.5 omega and the selector switch 2 to 1 omega, shaking the grounding resistance tester, and observing the position of a pointer to finish the accurate verification of the 1.5 omega resistance test of the resistance tester.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A portable resistance tester calibration device comprises a selector switch, wherein the selector switch is used for switching resistance within the resistance value range of a plurality of gears and comprises 1 fixed contact and a plurality of sliding contacts, each sliding contact corresponds to 1 switching gear, and the portable resistance tester calibration device is characterized by comprising a plurality of selector switches which are connected in series through the contacts of a relay; the switching device comprises a change-over switch, wherein the change-over switch is used for switching the serial connection state between the change-over switches, and the change-over switch is connected with the relay.
2. The portable resistance tester verification device of claim 1, wherein: the resistor calibration device comprises a first resistor calibration end and a second resistor calibration end, wherein a resistor between the first resistor calibration end and the second resistor calibration end is a calibration resistor, and the first resistor calibration end and the second resistor calibration end are respectively connected with the change-over switch.
3. The portable resistance tester verification device of claim 2, wherein: comprises 3 change-over switches including a first change-over switch (1), a second change-over switch (2) and a third change-over switch (3); comprises a first change-over switch (S1), a second change-over switch (S2) and 2 change-over switches.
4. The portable resistance tester verification device of claim 3, wherein: when the first change-over switch (S1) is in an opening state, the first change-over switch (1) and the second change-over switch (2) are controlled to be connected in series; and when the second change-over switch (S2) is in an opening state, the second change-over switch (2) and the third change-over switch (3) are controlled to be connected in series.
5. The portable resistance tester verification device of claim 3, wherein: the first transfer switch (S1) is connected with a first relay (KA1), and a first normally open contact (KA 1-1) of the first relay (KA1) is connected between a sliding contact of the first transfer switch (1) and a fixed contact of the second transfer switch (2); a first normally closed contact (KA 2-2) of a second relay (KA2) is connected between a fixed contact of the first change-over switch (1) and the first resistor verification end, and a second normally closed contact (KA 2-3) of the second relay (KA2) is connected between a sliding contact of the second change-over switch (2) and the second resistor verification end.
6. The portable resistance tester verification device of claim 5, wherein: the second transfer switch (S2) is connected with a second relay (KA2), and a second normally open contact (KA 2-1) of the second relay (KA2) is connected between the sliding contact of the second transfer switch (2) and the fixed contact of the third transfer switch (3).
7. The portable resistance tester verification device of claim 6, wherein: a parallel circuit formed by a third normally open contact (KA 2-4) of a second relay (KA2) and a third normally closed contact (KA 1-2) of a first relay (KA1) is connected between the fixed contact of the second change-over switch (2) and the first resistor verification end, and a sliding contact of the third change-over switch (3) is connected with the second resistor verification end.
8. The portable resistance tester verification device of claim 3, wherein: and a fourth normally closed contact (KA 1-3) of a first relay (KA1) is connected between the sliding contact of the first selector switch (1) and the second resistor verification end.
9. The portable resistance tester verification device of claim 3, wherein: and a fifth normally closed contact (KA 1-4) of a first relay (KA1) is connected between the fixed contact of the third change-over switch (3) and the first resistor verification end.
10. The portable resistance tester verification device of claim 3, wherein: the first change-over switch (S1) is connected with the first indicator lamp (VD1), the second indicator lamp (VD2), and the second change-over switch (S2) is connected with the third indicator lamp (VD 3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121267447.7U CN215494078U (en) | 2021-06-07 | 2021-06-07 | Portable resistance tester calibration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121267447.7U CN215494078U (en) | 2021-06-07 | 2021-06-07 | Portable resistance tester calibration equipment |
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| Publication Number | Publication Date |
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| CN215494078U true CN215494078U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121267447.7U Expired - Fee Related CN215494078U (en) | 2021-06-07 | 2021-06-07 | Portable resistance tester calibration equipment |
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| CN (1) | CN215494078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203972A (en) * | 2021-06-07 | 2021-08-03 | 中国人民解放军战略支援部队航天工程大学士官学校 | Portable resistance tester calibration device and calibration method |
-
2021
- 2021-06-07 CN CN202121267447.7U patent/CN215494078U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203972A (en) * | 2021-06-07 | 2021-08-03 | 中国人民解放军战略支援部队航天工程大学士官学校 | Portable resistance tester calibration device and calibration method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |