CN209911502U - VD4 medium voltage switch comprehensive test platform - Google Patents
VD4 medium voltage switch comprehensive test platform Download PDFInfo
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- CN209911502U CN209911502U CN201920088999.8U CN201920088999U CN209911502U CN 209911502 U CN209911502 U CN 209911502U CN 201920088999 U CN201920088999 U CN 201920088999U CN 209911502 U CN209911502 U CN 209911502U
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Abstract
The utility model provides a VD4 medium voltage switch comprehensive test platform; 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 further comprises a transfer line device (7); a loop resistance test line of the loop resistance tester (1), a direct current resistance test line of the direct current resistance tester (2), an insulation resistance test line of the insulation resistance tester (3) and a switch characteristic test line of the switch characteristic tester (4) are respectively connected with the patch cord device (7); the utility model discloses a VD4 medium voltage switch combined test platform design benefit, the practicality is strong.
Description
Technical Field
The utility model relates to an electrical element test system field especially relates to a VD4 medium voltage switch combined test platform.
Background
The existing maintenance of the voltage switch in the VD4 nuclear power plant is mainly divided into two parts, namely equipment inspection and electrical test. The electrical test comprises test items such as verification of switch auxiliary contacts, insulation measurement, switching-on and switching-off operation, verification of an automatic energy storage function of a circuit breaker, a mechanical characteristic test, a low-voltage action test, verification of a switching-on and tripping-preventing function and the like. At present, the inspection and test projects are manually executed one by one, the execution efficiency is low, the test wiring needs to be replaced for multiple times, different test instruments are used, the execution is complex, the culture period of testers is long, the field test working progress and quality control difficulty is high, and the risk of human error is high.
SUMMERY OF THE UTILITY MODEL
The utility model provides an above-mentioned technical problem, a VD4 medium voltage switch combined test platform is proposed.
The utility model provides a technical scheme is:
the utility model 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 switch 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 switch characteristic tester are respectively connected with the ARM industrial control intelligent control terminal through a 485 bus and a 485 bus isolation repeater;
the VD4 medium voltage switch comprehensive test platform also comprises a switching line device; a loop resistance test line of the loop resistance tester, a direct current resistance test line of the direct current resistance tester, an insulation resistance test line of the insulation resistance tester and a switch characteristic test line of the switch 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 switch characteristic test wire of the switch characteristic tester with a tested VD4 medium voltage switch and a tested cabinet directly or indirectly.
The utility model discloses in foretell VD4 medium voltage switch combined test platform, 485 bus isolation repeater still has the 485 commentaries on classics bluetooth communication device that is used for being connected with the PC communication through 485 bus connection.
In the VD4 medium voltage switch comprehensive test platform of the present invention, the transfer line device is provided with a fixed contact, and further includes a contact test spring mechanism installed in the fixed contact;
the contact test spring mechanism comprises a first insulating sleeve fixedly installed 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 can stretch into the first insulating sleeve and is connected with one end, far away from the test lead, of the metal spring;
the metal ejector rod is provided with a pressing part which is used for electrically contacting with a switch moving contact under the action of a metal spring when the switch moving contact of a tested switch on the VD4 medium-voltage switch and the cabinet 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 of the present invention, the transfer line device includes 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 static 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 line of the insulation resistance tester; the movable contact of the second relay is also connected with an outgoing line of a VD4 medium-voltage switch comprehensive test platform.
The utility model discloses among the foretell VD4 medium voltage switch combined test platform, the second stationary contact of second relay and the L line connection of the insulation resistance test line of insulation resistance tester.
The utility model also provides a contact test spring mechanism, which is arranged in a fixed contact;
the contact test spring mechanism comprises a first insulating sleeve fixedly installed 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 can stretch into the first insulating sleeve and is connected with one end, far away from the test lead, of the metal spring;
the metal ejector rod is provided with a pressing part which is used for electrically contacting with a switch moving contact under the action of a metal spring when the switch moving contact of a tested switch on the VD4 medium-voltage switch and the cabinet 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 utility model also provides a patch cord device, which comprises a first relay and a second relay;
the movable contact of the first relay is used for being electrically connected with a direct current resistance test wire of the direct current resistance tester, and the static 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 line of the insulation resistance tester; the movable contact of the second relay is also connected with an outgoing line.
The utility model discloses in foretell change-over line device, the second stationary contact of second relay be used for with the L line connection of the insulation resistance test line of insulation resistance tester.
The utility model discloses constructed a VD4 medium voltage switch combined test platform and contact test spring mechanism thereof, its test wire with multiple tester is connected with a change termination respectively, like this, just can utilize the change termination to carry out the work of multiple detection project, has avoided current electrical test to detect the problem that the project detection is complicated, the degree of difficulty is big. The utility model discloses a VD4 medium voltage switch combined test platform and contact test spring mechanism design benefit, the practicality is strong.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 shows a functional block diagram of a VD4 medium voltage switch comprehensive test platform according to a preferred embodiment of the present invention;
fig. 2 is a reference diagram showing a use state of a transfer line device of the integrated test platform of the VD4 shown in fig. 1;
FIG. 3 shows 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 arrangement of FIG. 3;
fig. 5 shows a reference diagram of a state of use of the transfer line device shown in fig. 3.
Detailed Description
The utility model discloses the technical problem that will solve is: the existing electrical test detection items of the VD4 medium-voltage switch are manually executed one by one, the execution efficiency is low, the test wiring needs to be replaced for multiple times, different test instruments are used, the execution is complex, the culture period of testers is long, the field test working progress and the quality control difficulty are high, and the risk of human errors is high. The utility model discloses the technical thinking that just this technical problem provided is: the VD4 medium-voltage switch comprehensive test platform is constructed, the test wires of various testers are respectively connected with a transfer line device, and therefore the transfer line device can be used for carrying out various detection items, and the problems that the existing electrical test detection items are complex in detection and high in difficulty are solved.
In order to make the technical purpose, technical solution and technical effects of the present invention more clear so as to facilitate those skilled in the art to understand and implement the present invention, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, fig. 1 shows a block diagram of functional modules of the VD4 medium voltage switch comprehensive test platform according to the 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 switch 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 an ARM industrial control intelligent control terminal 6 through a 485 bus and an isolation repeater 5 through the 485 bus;
the VD4 medium voltage switch comprehensive test platform also comprises a patch cord device 7; a loop resistance test line of the loop resistance tester 1, a direct current resistance test line of the direct current resistance tester 2, an insulation resistance test line of the insulation resistance tester 3, and a 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 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 switch characteristic test line of the switch characteristic tester 4 with the tested VD4 medium voltage switch and the tested cabinet 8 directly or indirectly.
Through the structure of the VD4 medium voltage switch comprehensive test platform, the following functions can be realized:
1) testing the loop resistance of the switch;
2) testing the time characteristics of the switch (including three-phase closing time, opening time, bouncing time and different-phase time);
3) low voltage testing of the switch;
4) the insulation resistance test of a primary loop of the switch and the insulation resistance test of each wiring of a secondary loop;
5) the test of the direct current resistance and the verification of the auxiliary contact of the switch of the energy storage motor, the closing coil, the opening coil, the locking relay coil and the anti-tripping relay coil;
6) an auxiliary contact test during switching-off/switching-on, an auxiliary contact test during energy storage/non-energy storage, and an auxiliary contact test at an operation position/test position;
7) a closing anti-tripping test;
8) the data storage, inquiry and printing by taking the whole switch data as a unit have a preliminary judgment function;
9) and the comparison function (forming a chart) of various data in the switch life cycle is realized.
10) The test process realizes full automation, only need to be pushed into test platform and shake to the operation position by the test switch, the operation of a key to shake the switch to the test position according to the suggestion, can accomplish whole experiment, need not too much manual intervention (trade the test wire, operate various instruments etc.).
Further, in the present embodiment, the 485 bus isolation repeater 5 is further connected with a 485-to-bluetooth communication device 10 for communication connection with a PC 9 through a 485 bus.
Further, as shown in fig. 2, fig. 2 shows a reference diagram of a use state of the transfer line device of the integrated test platform of the voltage switch in VD4 shown in fig. 1. Because the voltage required by the insulation resistance test is high (2500V), the insulation resistance test is completely isolated from the test wiring of other test items (loop resistance test and switch characteristic test) of a primary loop, a fixed contact 71 is arranged on the patch cord device 7, and the insulation resistance test device also 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 testing 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 disposed 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 shielding 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 push rod 78 retractable in the first insulating sleeve 73 and connected to one end of the metal spring 74 away from the test lead 75. The metal push rod 78 is provided with a pressing part 781 for electrically contacting 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 to 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.
Further, the first insulating sleeve 73 and the second insulating sleeve 79 are made of organic glass tubes; the metal pipe 76 is a stainless steel pipe. It is understood that the first insulating sleeve 73 and the second insulating sleeve 79 may also be insulating tubes made of ceramic, cement, etc. Other conductive metal tubes may be used for the metal tube 76.
Thus, when the switch 11 to be tested is in the operating position, the switch moving contact 12 is nested at the innermost side of the fixed contact 71, so that the metal push 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 11 under test can then be tested, without starting the test of the insulation resistance of the switch 11 under test.
When the tested switch 11 is swung to the testing 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, so that 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 between the insulation resistance test and the switch characteristic test is broken.
Further, the test of the secondary contact of the VD4 medium voltage switch and the cabinet 8 not only tests the dc resistance of the secondary contact when it is turned on and off, but also tests the insulation of the secondary contact to ground and other wires. The secondary contacts of the VD4 medium-voltage switch and the cabinet 8 are numerous, and in order to complete the function and save the relay, the patch cord device 7 of the VD4 medium-voltage switch comprehensive test platform adopts the circuit shown in figures 4-5.
In particular, as shown in fig. 4, fig. 4 shows a schematic electrical circuit diagram of the patch cord device 7 shown in fig. 3; fig. 5 shows a reference diagram for a state of use of the patch cord device 7 shown in fig. 3. The patch panel device 7 includes a first relay KM1 and a second relay KM 2;
the movable contact of the first relay KM1 is electrically connected with a direct-current resistance test wire of a direct-current resistance tester 2, the static 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 static contact and a second static contact, the first static contact of the second relay KM2 is grounded, and the second static contact of the second relay KM2 is connected with an insulation resistance test wire of an 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 a VD4 medium-voltage switch comprehensive test platform. The J1 and J2 joints are two ends of the lead-out wire. And Z + and Z-are respectively the positive and negative poles of a direct current resistance test line of the direct current resistance tester 2.
As shown in fig. 4-5, the circuit implements the following functions:
1. switched-on direct current resistance test: when the joints J1 and J2 are connected, the KM1 and the KM2 are closed, the insulation resistance test is in a standby state (voltage is not output), the platform starts a direct current resistance tester to test the direct current resistance of the joints J1 and J2 when the joints are connected, and whether the contact is good or not is judged;
2. open dc resistance test: when the J1 and J2 contacts of the platform are disconnected, the KM1 and the KM2 are closed, the insulation resistance test is in a standby state (voltage is not output), the platform starts a direct current resistance tester to test the direct current resistance when the J1 and the J2 are disconnected, and whether the J1 and the J2 are disconnected is judged;
3. and (3) testing the insulation resistance: when the J1 and J2 contacts of the platform are connected, the KM1 is disconnected, the KM2 is closed, the insulation resistance tester is started, the insulation resistance of the J1 and the J2 to the ground can be tested, at the moment, two relays of other secondary contacts are in an uncharged state, namely, two ends of the other secondary contacts are grounded through the normally closed point of the relays, so that the tested insulation resistance is the insulation resistance of the J1 and the J2 to the ground and other secondary contacts, the insulation of the secondary connection to the ground is checked, the insulation of the secondary connection to other secondary connections is also checked, and the ground connection and the line-to-line connection of the secondary connection are effectively avoided.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (5)
1. A 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 switch 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 switch characteristic tester (4) are respectively connected with an ARM industrial control intelligent control terminal (6) through a 485 bus and an isolation repeater (5) through the 485 bus;
the VD4 medium voltage switch comprehensive test platform further comprises a transfer line device (7); a loop resistance test line of the loop resistance tester (1), a direct current resistance test line of the direct current resistance tester (2), an insulation resistance test line of the insulation resistance tester (3) and a switch characteristic test line of the switch characteristic tester (4) are respectively connected with the patch cord device (7); the switching line device (7) is used for respectively connecting a loop resistance test line of the loop resistance tester (1), a direct current resistance test line of the direct current resistance tester (2), an insulation resistance test line of the insulation resistance tester (3) and a switching characteristic test line of the switching characteristic tester (4) with a tested VD4 medium voltage switch and a tested machine cabinet (8) directly or indirectly.
2. A VD4 medium voltage switch comprehensive test platform according to claim 1, characterized in that, the 485 bus isolation repeater (5) is further connected with a 485-to-Bluetooth communication device (10) for communication connection with a PC (9) through a 485 bus.
3. A VD4 medium voltage switch comprehensive test platform according to claim 1, characterized in that, the transfer line device (7) is provided with a fixed contact (71), and further comprises a contact test spring mechanism (72) installed in the fixed contact (71);
the contact test spring mechanism (72) comprises a first insulating sleeve (73) fixedly installed 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 stretch into the first insulating sleeve (73) and is 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 being electrically contacted 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 wire (77) is connected to a G wire of an insulation resistance test wire of the insulation resistance tester (3).
4. A VD4 medium voltage switch integrated test platform according to claim 3, characterized in that, the transfer line device (7) comprises a first relay (KM1) and a second relay (KM 2);
the movable contact of the first relay (KM1) is electrically connected with a direct-current resistance test wire of the direct-current resistance tester (2), and the fixed contact of the first relay (KM1) is electrically connected with the movable contact of the second relay (KM 2); the second relay (KM2) is provided with a first static contact and a second static contact, the first static contact of the second relay (KM2) is grounded, and the second static contact of the second relay (KM2) is connected with an insulation resistance test wire of the insulation resistance tester (3); the movable contact of the second relay (KM2) is also connected with an outgoing line of a VD4 medium-voltage switch comprehensive test platform.
5. A VD4 medium voltage switch integrated test platform according to claim 4, characterized in that, the second stationary contact of the second relay (KM2) is connected with the L line of the insulation resistance test line of the insulation resistance tester (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920088999.8U CN209911502U (en) | 2019-01-18 | 2019-01-18 | VD4 medium voltage switch comprehensive test platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920088999.8U CN209911502U (en) | 2019-01-18 | 2019-01-18 | VD4 medium voltage switch comprehensive test platform |
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| CN209911502U true CN209911502U (en) | 2020-01-07 |
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| CN201920088999.8U Active CN209911502U (en) | 2019-01-18 | 2019-01-18 | VD4 medium voltage switch comprehensive test platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581216A (en) * | 2019-01-18 | 2019-04-05 | 阳江核电有限公司 | VD4 Medium voltage switch or circuit breaker all-around test stand and its dependency structure |
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2019
- 2019-01-18 CN CN201920088999.8U patent/CN209911502U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581216A (en) * | 2019-01-18 | 2019-04-05 | 阳江核电有限公司 | VD4 Medium voltage switch or circuit breaker all-around test stand and its dependency structure |
| CN109581216B (en) * | 2019-01-18 | 2024-01-12 | 阳江核电有限公司 | VD4 medium voltage switch comprehensive test platform and related structure thereof |
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