CN109581216B - VD4 medium voltage switch comprehensive test platform and related structure thereof - Google Patents
VD4 medium voltage switch comprehensive test platform and related structure thereof Download PDFInfo
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- CN109581216B CN109581216B CN201910048113.1A CN201910048113A CN109581216B CN 109581216 B CN109581216 B CN 109581216B CN 201910048113 A CN201910048113 A CN 201910048113A CN 109581216 B CN109581216 B CN 109581216B
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- 238000012360 testing method Methods 0.000 title claims abstract description 173
- 238000009413 insulation Methods 0.000 claims abstract description 73
- 239000002184 metal Substances 0.000 claims description 54
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a VD4 medium-voltage switch comprehensive test platform and a related structure thereof; the VD4 medium-voltage switch comprehensive test platform comprises a loop resistance tester (1), a direct current resistance tester (2), an insulation resistance tester (3), a switch characteristic tester (4) and an ARM industrial control intelligent control terminal (6); the VD4 medium voltage switch comprehensive test platform also comprises an adapter wire device (7); the loop resistance test line of the loop resistance tester (1), the direct current resistance test line of the direct current resistance tester (2), the insulation resistance test line of the insulation resistance tester (3) and the switching characteristic test line of the switching characteristic tester (4) are respectively connected with the patch cord device (7); the VD4 medium voltage switch comprehensive test platform and the related structure thereof are ingenious in design and strong in practicability.
Description
Technical Field
The invention relates to the field of electrical element testing systems, in particular to a VD4 medium-voltage switch comprehensive test platform and a related structure thereof.
Background
The existing overhaul of the VD4 medium-voltage switch of the nuclear power station is mainly divided into two parts of equipment inspection and electrical test. The electrical test comprises test items such as verification of auxiliary contacts of a switch, insulation measurement, closing and opening operation, automatic energy storage function verification of a circuit breaker, mechanical characteristic test, low-voltage action test, closing and tripping prevention function verification and the like. At present, the inspection and test projects are manually executed one by one, the execution efficiency is low, the test wiring is required to be replaced for a plurality of times, different test instruments are used, the execution is complex, the culture period of test personnel is long, the on-site test work progress and quality control difficulty are high, and the human error risk is high.
Disclosure of Invention
Aiming at the technical problems, the invention provides a VD4 medium-voltage switch comprehensive test platform and a related structure thereof.
The technical scheme provided by the invention is as follows:
the invention provides a VD4 medium-voltage switch comprehensive test platform, which comprises a loop resistance tester, a direct current resistance tester, an insulation resistance tester, a switching characteristic tester and an ARM industrial control intelligent control terminal;
the loop resistance tester, the direct current resistance tester, the insulation resistance tester and the switching characteristic tester are respectively connected with the ARM industrial control intelligent control terminal through a 485 bus isolation relay by a 485 bus;
the VD4 medium voltage switch comprehensive test platform also comprises an adapter wire device; the loop resistance test line of the loop resistance tester, the direct current resistance test line of the direct current resistance tester, the insulation resistance test line of the insulation resistance tester and the switching characteristic test line of the switching characteristic tester are respectively connected with the patch cord device; the patch cord device is used for respectively connecting a loop resistance test wire of the loop resistance tester, a direct current resistance test wire of the direct current resistance tester, an insulation resistance test wire of the insulation resistance tester and a switching characteristic test wire of the switching characteristic tester with the tested VD4 medium-voltage switch and the cabinet directly or indirectly.
In the VD4 medium voltage switch comprehensive test platform, the 485 bus isolation repeater is also connected with a 485-to-Bluetooth communication device which is used for being in communication connection with a PC through a 485 bus.
In the VD4 medium voltage switch comprehensive test platform, the patch cord device is provided with the fixed contact and further comprises a contact test spring mechanism arranged in the fixed contact;
the contact test spring mechanism comprises a first insulating sleeve fixedly arranged in the fixed contact, a metal spring arranged in the first insulating sleeve, a test lead extending into the first insulating sleeve and connected with one end of the metal spring, a metal pipe sleeved outside the first insulating sleeve, a shielding lead connected with one end of the metal pipe, a second insulating sleeve sleeved outside the metal pipe and a metal ejector rod which is telescopic in the first insulating sleeve and connected with one end of the metal spring far away from the test lead;
the metal ejector rod is provided with a pressing part which is used for electrically contacting with the switch moving contact of the tested switch on the VD4 medium-voltage switch and the cabinet under the action of the metal spring when the switch moving contact is separated from the fixed contact;
the test lead is connected with an L line of an insulation resistance test line of the insulation resistance tester; the shielding lead is connected with a G line of an insulation resistance test line of the insulation resistance tester.
In the VD4 medium voltage switch comprehensive test platform, the patch cord device comprises a first relay and a second relay;
the movable contact of the first relay is electrically connected with a direct current resistance test wire of the direct current resistance tester, and the stationary contact of the first relay is electrically connected with the movable contact of the second relay; the second relay is provided with a first static contact and a second static contact, the first static contact of the second relay is grounded, and the second static contact of the second relay is connected with an insulation resistance test wire of the insulation resistance tester; and the movable contact of the second relay is also connected with an outgoing line of the VD4 medium-voltage switch comprehensive test platform.
In the VD4 medium voltage switch comprehensive test platform, the second stationary contact of the second relay is connected with the L line of the insulation resistance test line of the insulation resistance tester.
The invention also provides a contact test spring mechanism which is arranged in a certain contact;
the contact test spring mechanism comprises a first insulating sleeve fixedly arranged in the fixed contact, a metal spring arranged in the first insulating sleeve, a test lead extending into the first insulating sleeve and connected with one end of the metal spring, a metal pipe sleeved outside the first insulating sleeve, a shielding lead connected with one end of the metal pipe, a second insulating sleeve sleeved outside the metal pipe and a metal ejector rod which is telescopic in the first insulating sleeve and connected with one end of the metal spring far away from the test lead;
the metal ejector rod is provided with a pressing part which is used for electrically contacting with the switch moving contact of the tested switch on the VD4 medium-voltage switch and the cabinet under the action of the metal spring when the switch moving contact is separated from the fixed contact;
the test lead is connected with an L line of an insulation resistance test line of the insulation resistance tester; the shielding lead is connected with a G line of an insulation resistance test line of the insulation resistance tester.
The invention also provides an adapter wire device which comprises a first relay and a second relay;
the movable contact of the first relay is electrically connected with a direct current resistance test wire of the direct current resistance tester, and the stationary contact of the first relay is electrically connected with the movable contact of the second relay; the second relay is provided with a first static contact and a second static contact, the first static contact of the second relay is grounded, and the second static contact of the second relay is used for being connected with an insulation resistance test wire of the insulation resistance tester; and the movable contact of the second relay is also connected with an outgoing line.
In the patch cord device of the present invention, the second stationary contact of the second relay is used for being connected with an L-line of an insulation resistance test line of the insulation resistance tester.
The invention constructs a VD4 medium-voltage switch comprehensive test platform and a contact test spring mechanism thereof, which respectively connect test wires of various testers with a switching wire device, thus the switching wire device can be utilized to carry out the work of various detection items and the problems of complex detection and great difficulty of the existing electric test detection items are avoided. The VD4 medium voltage switch comprehensive test platform and the contact test spring mechanism thereof have smart design and strong practicability.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a functional block diagram of a VD4 medium voltage switch integrated test platform according to a preferred embodiment of the present invention;
FIG. 2 shows a reference diagram of the usage status of the patch cord device of the VD4 medium voltage switch integrated test platform shown in FIG. 1;
FIG. 3 illustrates a schematic structural view of the contact test spring mechanism shown in FIG. 2;
fig. 4 shows a schematic circuit diagram of the patch cord device shown in fig. 3;
fig. 5 shows a usage state reference diagram of the patch cord device shown in fig. 3.
Detailed Description
The technical problems to be solved by the invention are as follows: the existing electrical test detection projects of the VD4 medium-voltage switch are all required to be manually executed one by one, the execution efficiency is low, test wiring is required to be replaced for multiple times, different test instruments are used, the execution is complicated, the test personnel culture period is long, the on-site test work progress and quality control difficulty are high, and the human error risk is high. The technical thought provided by the invention regarding the technical problem is as follows: the VD4 medium voltage switch comprehensive test platform is constructed, and test wires of various testers are respectively connected with a switching device, so that the switching device can be used for carrying out work of various detection items, and the problems of complex detection and high difficulty of the existing electric test detection items are avoided.
In order to make the technical objects, technical solutions and technical effects of the present invention more apparent, so as to facilitate understanding and implementation of the present invention by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific examples.
Referring now to FIG. 1, FIG. 1 is a block diagram showing the functional blocks of a VD4 medium voltage switch integrated test platform according to a preferred embodiment of the present invention. The VD4 medium-voltage switch comprehensive test platform comprises a loop resistance tester 1, a direct current resistance tester 2, an insulation resistance tester 3, a switching characteristic tester 4 and an ARM industrial control intelligent control terminal 6;
the loop resistance tester 1, the direct current resistance tester 2, the insulation resistance tester 3 and the switching characteristic tester 4 are respectively connected with the ARM industrial control intelligent control terminal 6 through a 485 bus isolation repeater 5;
the VD4 medium voltage switch comprehensive test platform also comprises an adapter wire device 7; the loop resistance test line of the loop resistance tester 1, the direct current resistance test line of the direct current resistance tester 2, the insulation resistance test line of the insulation resistance tester 3 and the switching characteristic test line of the switching characteristic tester 4 are respectively connected with the patch cord device 7; the patch cord device 7 is used for respectively connecting the loop resistance test cord of the loop resistance tester 1, the direct current resistance test cord of the direct current resistance tester 2, the insulation resistance test cord of the insulation resistance tester 3 and the switching characteristic test cord of the switching characteristic tester 4 with the tested VD4 medium voltage switch and the cabinet 8 directly or indirectly.
Through the structure of the VD4 medium-voltage switch comprehensive test platform, the following functions can be realized:
1) Loop resistance test of the switch;
2) Time characteristic test of switch (including three-phase closing time, opening time, bouncing time and different periods of time);
3) A low voltage test of the switch;
4) The insulation resistance test of the primary loop and the insulation resistance test of each wiring of the secondary loop of the switch;
5) The test of the direct current resistance of the switch energy storage motor, the switch-on coil, the switch-off coil, the locking relay coil and the anti-tripping relay coil and the test of verifying the disconnection auxiliary contact;
6) Auxiliary contact test during opening/closing, auxiliary contact test during energy storage/non-energy storage, and auxiliary contact test at running position/test position;
7) Switching-on anti-tripping test;
8) Data storage, inquiry and printing are carried out by taking the whole switch data as a unit, and a preliminary judging function is provided;
9) The comparison function (forming a chart) of various data in the life cycle of the switch is realized.
10 Full automation is realized in the testing process, the switch to be tested is pushed into the test platform and is rocked to the running position, one-key operation is performed, the switch is rocked to the test position according to the prompt, the whole test can be completed, and excessive manual intervention (changing test lines, operating various instruments and the like) is not needed.
Further, in this embodiment, the 485 bus isolation repeater 5 is further connected with a 485 to bluetooth communication device 10 for communication connection with the PC 9 through a 485 bus.
Further, as shown in fig. 2, fig. 2 shows a reference diagram of the usage state of the patch cord device of the VD4 medium voltage switch comprehensive test platform shown in fig. 1. Because the voltage required by the insulation resistance test is high (2500V), the test wiring of the circuit is completely isolated from the test wiring of other test items (loop resistance test and switching characteristic test) of the primary loop, the patch cord device 7 is provided with a fixed contact 71, and the patch cord device further comprises a contact test spring mechanism 72 arranged in the fixed contact 71;
specifically, as shown in fig. 3, fig. 3 shows a schematic structural view of the contact test spring mechanism shown in fig. 2. The contact test spring mechanism 72 includes a first insulating sleeve 73 fixedly installed in the fixed contact 71, a metal spring 74 provided in the first insulating sleeve 73, a test lead 75 extending into the first insulating sleeve 73 and connected to one end of the metal spring 74, a metal tube 76 sleeved outside the first insulating sleeve 73, a shield lead 77 connected to one end of the metal tube 76, a second insulating sleeve 79 sleeved outside the metal tube 76, and a metal jack 78 retractable in the first insulating sleeve 73 and connected to one end of the metal spring 74 remote from the test lead 75. The metal jack 78 has a pressing portion 781 for electrically contacting the switch moving contact 12 of the tested switch 11 on the VD4 medium voltage switch and the cabinet 8 under the action of the metal spring 74 when the switch moving contact 12 is separated from the fixed contact 71. The test lead 75 is connected to the L line of the insulation resistance test line of the insulation resistance tester 3; the shield lead 77 is connected to the G line of the insulation resistance test line of the insulation resistance tester 3.
Further, the first insulating sleeve 73 and the second insulating sleeve 79 are each made of plexiglas; stainless steel tube is used for the metal tube 76. It will be appreciated that the first and second insulating sleeves 73, 79 may also be made of ceramic, cement or other insulating tubes. Other conductive metal tubes may also be used for the metal tube 76.
Thus, when the tested switch 11 is in the operation position, the switch moving contact 12 is nested at the innermost side of the fixed contact 71, so that the metal ejector rod 78 is pressed by the switch moving contact 12 and compresses the metal spring 74; at this time, the switch moving contact 12 of the tested switch 11 is firmly and electrically connected with the fixed contact 71 of the patch cord device 7; the primary loop resistance and the switching characteristic parameters of the switch under test 11 can then be tested, at which time the test of the insulation resistance of the switch under test 11 is not started.
When the tested switch 11 is rocked to the test position, the switch moving contact 12 is separated from the fixed contact 71; then, the metal ejector rod 78 is pushed out by the metal spring 74, the metal ejector rod 78 is in contact with the switch moving contact 12, and the outgoing line of the VD4 medium voltage switch comprehensive test platform is in contact with the metal ejector rod 78 to test the insulation resistance of the switch moving contact 12 of the tested switch 11, so that the connection of power failure with primary loop resistance test and switch characteristic test is realized.
Further, the test of the VD4 medium voltage switch and the secondary contact of the cabinet 8 tests not only the direct current resistance at the time of turning on and off the secondary contact, but also the insulation of the secondary contact from the ground and other wires. The VD4 medium voltage switch and the cabinet 8 have a plurality of secondary contacts, and in order to complete the functions and save relays, the patch cord device 7 of the VD4 medium voltage switch comprehensive test platform adopts a circuit as shown in fig. 4-5.
Specifically, as shown in fig. 4, fig. 4 shows a schematic circuit diagram of the patch cord device 7 shown in fig. 3; fig. 5 shows a usage state reference diagram of the patch cord device 7 shown in fig. 3. The patch cord device 7 comprises a first relay KM1 and a second relay KM2;
the movable contact of the first relay KM1 is electrically connected with the direct current resistance test wire of the direct current resistance tester 2, the fixed contact of the first relay KM1 is electrically connected with the movable contact of the second relay KM2, the second relay KM2 is provided with a first fixed contact and a second fixed contact, the first fixed contact of the second relay KM2 is grounded, and the second fixed contact of the second relay KM2 is connected with the insulation resistance test wire of the insulation resistance tester 3. Preferably, the second stationary contact of the second relay KM2 is connected to the L line of the insulation resistance test line of the insulation resistance tester 3.
Further, the movable contact of the second relay KM2 is also connected with an outgoing line of the VD4 medium-voltage switch comprehensive test platform. The J1 and J2 joints are two ends of the outgoing line. Z+ and Z-are the positive and negative poles of the DC resistance test line of the DC resistance tester 2 respectively.
As shown in fig. 4-5, the circuit performs the following functions:
1. on direct current resistance test: when the J1 and J2 contacts are connected, the KM1 and KM2 are closed, the insulation resistance test is in a standby state (no output voltage), and the platform starts the direct current resistance tester to test the direct current resistance of the J1 and J2 contacts when connected, so as to judge whether the contact is good;
2. off direct current resistance test: when the J1 and J2 joints of the platform are disconnected, the KM1 and KM2 are closed, the insulation resistance test is in a standby state (no output voltage), and the platform starts a direct current resistance tester to test the direct current resistance when the J1 and J2 are disconnected, so as to judge whether the J1 and J2 are disconnected;
3. insulation resistance test: when the J1 and J2 joints of the platform are connected, the KM1 is disconnected, the KM2 is closed, an insulation resistance tester is started, insulation resistance of the J1 and J2 to the ground can be tested, at the moment, two relays of other secondary joints are in an uncharged state, namely, two ends of the other secondary joints are grounded through normally closed points of the relays, at the moment, the measured insulation resistance is insulation resistance of the J1 and J2 to the ground and other secondary joints, at the moment, insulation of the secondary joint to the ground is checked, insulation of the secondary joint to other secondary joints is checked, and ground connection and line connection of the secondary joint are effectively avoided.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (4)
1. The VD4 medium-voltage switch comprehensive test platform is characterized by comprising a loop resistance tester (1), a direct current resistance tester (2), an insulation resistance tester (3), a switching characteristic tester (4) and an ARM industrial control intelligent control terminal (6);
the loop resistance tester (1), the direct current resistance tester (2), the insulation resistance tester (3) and the switching characteristic tester (4) are respectively connected with the ARM industrial control intelligent control terminal (6) through a 485 bus isolation repeater (5);
the VD4 medium voltage switch comprehensive test platform also comprises an adapter wire device (7); the loop resistance test line of the loop resistance tester (1), the direct current resistance test line of the direct current resistance tester (2), the insulation resistance test line of the insulation resistance tester (3) and the switching characteristic test line of the switching characteristic tester (4) are respectively connected with the patch cord device (7); the patch cord device (7) is used for respectively connecting a loop resistance test cord of the loop resistance tester (1), a direct current resistance test cord of the direct current resistance tester (2), an insulation resistance test cord of the insulation resistance tester (3) and a switching characteristic test cord of the switching characteristic tester (4) with a tested VD4 medium-voltage switch and a cabinet (8) directly or indirectly;
the 485 bus isolation repeater (5) is also connected with a 485-to-Bluetooth communication device (10) which is used for being in communication connection with the PC (9) through a 485 bus;
the patch cord device (7) is provided with a fixed contact (71) and further comprises a contact test spring mechanism (72) arranged in the fixed contact (71);
the contact test spring mechanism (72) comprises a first insulating sleeve (73) fixedly arranged in the fixed contact (71), a metal spring (74) arranged in the first insulating sleeve (73), a test lead (75) extending into the first insulating sleeve (73) and connected with one end of the metal spring (74), a metal pipe (76) sleeved outside the first insulating sleeve (73), a shielding lead (77) connected with one end of the metal pipe (76), a second insulating sleeve (79) sleeved outside the metal pipe (76) and a metal ejector rod (78) which can be telescopic in the first insulating sleeve (73) and connected with one end, far away from the test lead (75), of the metal spring (74);
the metal ejector rod (78) is provided with a pressing part (781) which is used for electrically contacting with the switch moving contact (12) under the action of the metal spring (74) when the switch moving contact (12) of the tested switch (11) on the VD4 medium-voltage switch and the cabinet (8) is separated from the fixed contact (71);
the test lead (75) is connected with an L line of an insulation resistance test line of the insulation resistance tester (3); the shield lead (77) is connected to a G line of an insulation resistance test line of the insulation resistance tester (3).
2. The VD4 medium voltage switch integrated test platform according to claim 1, wherein the patch cord means (7) comprises a first relay (KM 1) and a second relay (KM 2);
the movable contact of the first relay (KM 1) is electrically connected with a direct current resistance test wire of the direct current resistance tester (2), and the stationary contact of the first relay (KM 1) is electrically connected with the movable contact of the second relay (KM 2); the second relay (KM 2) is provided with a first static contact and a second static contact, the first static contact of the second relay (KM 2) is grounded, and the second static contact of the second relay (KM 2) is connected with an insulation resistance test wire of the insulation resistance tester (3); and the movable contact of the second relay (KM 2) is also connected with an outgoing line of the VD4 medium-voltage switch comprehensive test platform.
3. The VD4 medium voltage switch integrated test platform according to claim 2, wherein the second stationary contact of the second relay (KM 2) is connected with the L line of the insulation resistance test line of the insulation resistance tester (3).
4. A contact test spring mechanism, characterized in that the contact test spring mechanism (72) is mounted in a certain contact (71);
the contact test spring mechanism (72) comprises a first insulating sleeve (73) fixedly arranged in the fixed contact (71), a metal spring (74) arranged in the first insulating sleeve (73), a test lead (75) extending into the first insulating sleeve (73) and connected with one end of the metal spring (74), a metal pipe (76) sleeved outside the first insulating sleeve (73), a shielding lead (77) connected with one end of the metal pipe (76), a second insulating sleeve (79) sleeved outside the metal pipe (76) and a metal ejector rod (78) which can be telescopic in the first insulating sleeve (73) and connected with one end, far away from the test lead (75), of the metal spring (74);
the metal ejector rod (78) is provided with a pressing part (781) which is used for electrically contacting with the switch moving contact (12) under the action of the metal spring (74) when the switch moving contact (12) of the tested switch (11) on the VD4 medium-voltage switch and the cabinet (8) is separated from the fixed contact (71);
the test lead (75) is connected with an L line of an insulation resistance test line of the insulation resistance tester (3); the shield lead (77) is connected to a G line of an insulation resistance test line of the insulation resistance tester (3).
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| CN201910048113.1A CN109581216B (en) | 2019-01-18 | 2019-01-18 | VD4 medium voltage switch comprehensive test platform and related structure thereof |
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| CN109581216B true CN109581216B (en) | 2024-01-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110109010A (en) * | 2019-06-24 | 2019-08-09 | 昆明北方红外技术股份有限公司 | Toggle switch automatic testing equipment |
| CN112398220A (en) * | 2020-10-30 | 2021-02-23 | 无锡中科电气设备有限公司 | Integrated intelligent testing device for medium-voltage switch of nuclear power station |
| CN112462142A (en) * | 2020-11-13 | 2021-03-09 | 无锡中科电气设备有限公司 | Insulation resistance testing device |
| CN114184948A (en) * | 2021-12-08 | 2022-03-15 | 无锡中科电气设备有限公司 | Testing device for medium-voltage switch |
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