CN109406126B - Mechanical characteristic test device for high-voltage circuit breaker - Google Patents
Mechanical characteristic test device for high-voltage circuit breaker Download PDFInfo
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- CN109406126B CN109406126B CN201811435164.1A CN201811435164A CN109406126B CN 109406126 B CN109406126 B CN 109406126B CN 201811435164 A CN201811435164 A CN 201811435164A CN 109406126 B CN109406126 B CN 109406126B
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- 238000012360 testing method Methods 0.000 title claims abstract description 225
- 230000007246 mechanism Effects 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 3
- 238000005191 phase separation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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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Abstract
The invention relates to a mechanical property test device of a high-voltage circuit breaker, which comprises: the device comprises a tester, a change-over switch, a test wire connector and a fixing device; the tester comprises a sub-channel, a combined channel and a public channel, wherein the public channel is connected with a test line connector through a test line, the sub-channel and the combined channel are connected with one end of a change-over switch through the test line, the other end of the change-over switch is connected with the test line connector through the test line, and the test device is connected with a terminal on a terminal strip to be tested through the test line connector; the fixing device can be fixed on the secondary terminal strip and used for fixing the test line connector, the circuit to be tested is connected correspondingly before testing, the state of the change-over switch is changed to switch the secondary circuit channel to be tested during testing, manual frequent line changing and wiring are avoided, and the risk caused by wiring errors is reduced.
Description
Technical Field
The invention relates to the field of high-voltage tests of electrical equipment, in particular to a mechanical characteristic test device of a high-voltage circuit breaker.
Background
The mechanical characteristic test of the 35kV and above high-voltage circuit breaker comprises time parameter test of the circuit breaker, action voltage test of an opening and closing electromagnet, speed characteristic test of the circuit breaker and the like, and is characterized in that wiring is required to be carried out on a control loop of the circuit breaker, and the test wiring is required to be replaced for a plurality of times in the test process; because other secondary circuits exist on the terminal strip where the circuit breaker control circuit is located at the same time, special precautions are needed in the wiring process to prevent the secondary circuits from being short-circuited or grounded due to wrong terminal connection.
In the test process, after the test wiring is connected, a test person needs to press the test wire connector by hand, so that the test wire connector is prevented from loosening and falling off due to poor contact of a terminal or vibration when the circuit breaker acts; in the test process, the wiring is replaced for a plurality of times, so that the working efficiency is affected, and the risk of wiring errors is increased. In the power system, because the secondary loop terminal is touched by mistake, the control protection loop acts by mistake, and the accident event of power failure and fault of the power grid equipment is caused; meanwhile, a tester pressing the terminal by hand is close to a mechanism box of the circuit breaker, and the huge sound generated by the mechanism box during the action of the circuit breaker damages the hearing of the tester, so that the tester does not meet the requirement of man-machine efficacy; since 2 to 3 persons are required to fix the test line connector on the secondary terminal strip, this certainly increases the labor cost of the test work, and simultaneously causes waste of human resources.
Disclosure of Invention
The invention provides a high-voltage circuit breaker mechanical property test device, which aims to overcome the defects that the manual frequent wire replacement and connection are needed, the wire replacement is inconvenient and the error is easy to occur in the high-voltage circuit breaker mechanical property test.
The device comprises: the device comprises a tester, a change-over switch, a test wire connector and a fixing device;
the tester comprises a sub-channel, a combined channel and a public channel, wherein the public channel is connected with a test line connector through a test line, the sub-channel and the combined channel are connected with one end of a change-over switch through the test line, the other end of the change-over switch is connected with the test line connector through the test line, and the test device is connected with a terminal to be tested on the secondary terminal strip through the test line connector.
The tester is connected with one side of the change-over switch through the test wire, the other side of the change-over switch is connected with the test wire connector through the test wire, the test wire connector is connected with a terminal to be tested on the terminal strip, the circuit to be tested is connected correspondingly well before testing, the secondary circuit channel to be tested is switched through changing the state of the change-over switch during testing, the manual frequent wire change and wiring are avoided, and the risk caused by wiring mistakes is reduced.
Preferably, the change-over switch comprises a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal, a sixth terminal and a contact piece;
the change-over switch comprises three gears, the contact piece is connected with the first terminal and the sixth terminal to form a gear, the contact piece is connected with the second terminal and the fifth terminal to form a gear, the contact piece is connected with the third terminal and the fourth terminal to form a gear, the first terminal is connected with a sub-channel on the tester through a test wire, the third terminal is connected with the sub-channel through the test wire, the fourth terminal and the sixth terminal are connected with the test wire through the test wire connector respectively, and the second terminal and the fifth terminal are left empty.
Three gear changes of the change-over switch are realized by changing the position of the contact piece, and the three gears are two gears for the breaker opening and closing state test and a stop test gear.
When the circuit breaker switching-on test is performed, the switch is switched to a switching-on channel, namely, the contact piece is connected with the third terminal and the fourth terminal, and the other two channels are in an open circuit state; similarly, when a breaker opening test is performed, the change-over switch is switched to an opening channel, namely the contact piece is connected with the first terminal and the sixth terminal; when the test is stopped, the transfer switch is switched to a closed channel, namely, the contact piece is connected with the second terminal and the fifth terminal, and at the moment, the two channels of opening and closing are in an open state; the change-over switch is convenient to switch and easy to realize.
Preferably, the change-over switch is a rotary switch, the change-over switch further comprises a rotary handle, the rotary handle is mechanically connected with the contact piece, the contact piece is driven to rotate by rotating the rotary handle, and the position of the rotary piece is changed to realize gear change.
Preferably, the change-over switch is a push button switch, the change-over switch further comprises a push button, the push button is mechanically connected with the contact piece, and the position of the contact piece is changed by pressing the push button, so that gear switching is realized.
Preferably, the fourth terminal and the sixth terminal can respectively select the type of the access test line according to the mechanism type of the tested breaker; the test lines connected with the fourth terminal or the sixth terminal are mainly divided into two test lines of single line and one-to-three, wherein the single line is that the fourth terminal 2.4 or the sixth terminal 2.6 is respectively connected with one test line 6, the one-to-three is that the fourth terminal 2.4 or the sixth terminal 2.6 is respectively connected with three test lines 6, and the two wiring types are respectively used for a breaker operating mechanism for three-phase linkage and three-phase separation; when the circuit breakers of the three-phase linkage mechanism of the tested circuit breaker are such as most of circuit breakers with voltage levels of 110kV and below, the fourth terminal and the sixth terminal are respectively connected with a test wire; if the tested circuit breaker is a three-phase separation mechanism, such as most circuit breakers with voltage levels of 220kV and above, the test line connected with the test line connector needs to be connected with three test lines by a test line, namely, the fourth terminal and the sixth terminal are respectively connected with three test lines, and the three test line connectors led out by the test lines are respectively connected with the connecting terminals and are connected with the positive terminal of the A, B, C three-phase closing control circuit and the positive terminal of the A, B, C three-phase opening control circuit in parallel.
Preferably, the device is also provided with a fixing device, the test wire connector is movably connected with the fixing device, and the fixing device can be fixed on the secondary terminal row to be tested; the test line connector is prevented from being pressed by a human hand during test, and the damage to the hearing caused by huge sound generated by a mechanism box of the circuit breaker due to the fact that the test personnel pressing the test line connector are close to the mechanism box of the circuit breaker is also prevented.
Preferably, the fixing device comprises a sliding block and a clamp, a fixing hole is formed in the sliding block, and the test wire connector penetrates through the fixing hole to be movably connected with the fixing device; the fixture is adopted for fixing, so that the fixing device can be conveniently fixed and moved, and the operation is flexible and convenient.
Preferably, the clamp comprises a clamping block, a connecting block, a guide rod, a spring and a screw; the connecting blocks are arranged on two sides of the sliding block, and the ends, away from the sliding block, of the connecting blocks are connected with the clamping blocks; the sliding block is provided with a through hole with the diameter equal to the radial dimension of the guide rod, the connecting block is provided with a through hole, the diameter of the through hole close to the sliding block end is equal to the diameter of the through hole of the sliding block, and the diameter of the through hole far away from the sliding block end is larger than the radial dimension of the spring; the radial dimension of the spring is larger than the radial dimension of the guide rod and smaller than the radial dimension of the head of the screw, and the radial dimension of the head of the screw is smaller than the diameter of the through hole on the connecting block, which is far away from the end of the sliding block; the guide rod passes through the through holes on the sliding block and the connecting block, the spring is sleeved on the guide rod and arranged in the through hole of the connecting block, and the screw is locked at the end parts of the two ends of the guide rod.
The fixing block and the sliding block are penetrated through the guide rod, the clamping and loosening of the fixing device are realized through the expansion and contraction of the spring, the structure is simple, and the sliding block can be moved along the guide rod to realize the fine adjustment of the positioning of the test wire joint.
Preferably, the connecting block is provided with a hollowed observation window for observing the position of the terminal to be detected; and the positioning of the test wire connector during the test is convenient.
Preferably, the clamping block is provided with the friction-increasing soft rubber, so that the clamping reliability is improved, and the fixing device is not easy to loosen and slip.
Preferably, a gasket is further arranged between the screw and the guide rod, the diameter of the outer edge of the gasket is larger than the radial dimension of the spring and smaller than the diameter of the through hole of the connecting block, and the diameter of the inner hole of the gasket is smaller than the radial dimension of the head of the screw; the gasket can be better fix the spring in the through-hole of connecting rod.
Preferably, the device further comprises a connecting terminal, the connecting terminal is an elongated metal sleeve terminal and is used for connecting the test wire connector with the terminal on the secondary terminal strip, and because the fixing device is used for replacing manpower to fix the test wire connector on the secondary terminal strip, the length of the metal connector of the original test wire is insufficient and effective contact with the terminal on the secondary terminal strip can not be realized, so that the elongated metal sleeve terminal is used for ensuring effective connection.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that: when the mechanical characteristic test of the high-voltage circuit breaker is carried out, the terminals of all loops to be tested can be connected with the tester at one time, the test in different states is realized by changing the state of the change-over switch during the test, the test wiring is prevented from being replaced for a plurality of times, the working efficiency of the test is improved, and the risk caused by wiring errors is reduced; meanwhile, the fixing device can fix the test wire connector on the secondary terminal strip, so that the test wire connector is connected with the wire connector to be tested, the test wire connector does not need to be manually pressed by hands, human resources are saved, and meanwhile, the damage to the hearing caused by huge sound generated by the mechanism box when the circuit breaker acts due to the fact that a tester pressing the test wire connector by hands is close to the mechanism box of the circuit breaker is avoided.
Drawings
Fig. 1 is a schematic diagram of a mechanical characteristic test device and a connection mode thereof for a three-phase linkage high-voltage circuit breaker according to example 1.
Fig. 2 is a schematic diagram of a one-to-three connection mode of the mechanical property test device of the three-phase separation high voltage circuit breaker in embodiment 1. Fig. 3 is a schematic diagram of a rotary switch structure in embodiment 1.
Fig. 4 is a half cross-sectional view of the fixation device structure.
Fig. 5 is a three-dimensional view of the fixture.
Fig. 6 is a half sectional view of the terminal structure.
Fig. 7 is a half cross-sectional view of the connection of the terminal block to the test wire connector.
Fig. 8 is a schematic diagram of a mechanical characteristic test device and a connection mode thereof for a three-phase linkage high-voltage circuit breaker according to example 2.
Fig. 9 is a schematic diagram of a mechanical characteristic test device and a connection mode thereof for a three-phase separation high voltage circuit breaker according to example 2.
Fig. 10 is a schematic structural view of the push button switch of embodiment 2.
In the figure: 1-tester, 2-change-over switch, 3-test wire connector, 4-fixing device, 1.1-sub channel, 1.2-combined channel, 1.3-public channel, 2.1-first terminal, 2.2-second terminal, 2.3-third terminal, 2.4-fourth terminal, 2.5-fifth terminal, 2.6-sixth terminal, 2.7-contact piece, 2.8-knob, 2.9-button, 4.1-slider, 4.2-clamp, 4.2.1-clamping block, 4.2.2-connecting block, 4.2.3-guide rod, 4.2.4-spring, 4.2.5-screw, 4.2.6-pad, 5-terminal row, terminal on 5.1-terminal row, 6-test wire, 7-wiring terminal.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions;
it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1:
as shown in fig. 1 to 7, the present embodiment provides a mechanical characteristic test device for a high voltage circuit breaker.
The device comprises: the tester 1, the change-over switch 2, the test wire connector 3 and the test wire 6;
the tester 1 comprises a sub-channel 1.1, a combined channel 1.2 and a public channel 1.3, wherein the public channel 1.3 is connected with a test line connector 3 through a test line 6, the sub-channel 1.1 and the combined channel 1.2 are connected with one end of a change-over switch 2 through the test line 6, the other end of the change-over switch 2 is connected with the test line connector 3 through the test line 6, and a testing device is connected with a terminal 5.1 to be tested on a secondary terminal strip 5 through the test line connector 3.
The change-over switch 2 comprises a first terminal 2.1, a second terminal 2.2, a third terminal 2.3, a fourth terminal 2.4, a fifth terminal 2.5, a sixth terminal 2.6 and a contact piece 2.7;
the change-over switch 2 comprises three gears, the contact piece 2.7 is used for connecting the first terminal 2.1 and the sixth terminal 2.6 to be one gear, the contact piece 2.7 is used for connecting the second terminal 2.2 and the fifth terminal 2.5 to be one gear, the contact piece 2.7 is used for connecting the third terminal 2.3 and the fourth terminal 2.4 to be one gear, the first terminal 2.1 is connected with the sub-channel 1.1 on the tester 1 through the test wire 6, the third terminal 2.3 is connected with the combined channel 1.2 through the test wire 6, the fourth terminal 2.4 and the sixth terminal 2.6 are respectively connected with the test wire connector 3 through the test wire 6, and the second terminal 2.2 and the fifth terminal 2.5 are left empty.
As shown in fig. 3, the switch 2 is a rotary switch, the switch 2 further includes a rotary handle 2.8, the rotary handle 2.8 is mechanically connected with the contact piece 2.7, the contact piece 2.7 is driven to rotate by rotating the rotary handle 2.8, and the position of the contact piece 2.7 is changed to realize gear switching.
The fourth terminal 2.4 and the sixth terminal 2.6 can respectively select the type of the access test line 6 according to the mechanism type of the tested breaker; the test line connected with the fourth terminal 2.4 or the sixth terminal 2.6 is mainly divided into two test lines of single line and one-to-three, wherein the single line is that the fourth terminal 2.4 or the sixth terminal 2.6 is respectively connected with one test line 6, the one-to-three is that the fourth terminal 2.4 or the sixth terminal 2.6 is respectively connected with three test lines 6, and the two wiring types are respectively used for a breaker operating mechanism with three-phase linkage and three-phase separation; when the circuit breakers of the three-phase linkage mechanism of the tested circuit breaker are such as most circuit breakers with voltage levels of 110kV and below, the fourth terminal 2.4 and the sixth terminal 2.6 are respectively connected with a test wire 6; if the tested circuit breaker is a three-phase separation mechanism, such as most circuit breakers with voltage levels of 220kV and above, the test line 6 connected with the test line connector 3 needs to be connected with three test lines 6 by a test connection wire with one third, namely, the fourth terminal 2.4 and the sixth terminal 2.6 are respectively connected with three test lines 6, and the three test line connectors 3 led out of the test lines 6 are respectively connected with connection terminals and are connected with the positive terminal of the A, B, C three-phase closing control circuit and the positive terminal of the A, B, C three-phase opening control circuit in parallel.
The device is also provided with a fixing device 4, the fixing device 4 is shown in fig. 4-5, the test wire connector 3 is movably connected with the fixing device 4, and the fixing device 4 can be fixed on a terminal strip 5 to be tested; the test line connector 3 is prevented from being pressed by a human hand during the test, and the damage to the hearing of a tester pressing the test line connector 3 caused by huge sound generated by a mechanism box when the mechanism box close to the circuit breaker acts is also prevented.
The fixing device 4 comprises a sliding block 4.1 and a clamp 4.2, a fixing hole is formed in the sliding block 4.1, and the test wire connector 3 is movably connected with the fixing device 4 through the fixing hole; the fixture 4.2 is adopted for fixation, so that the fixing device 4 can be conveniently fixed and moved, and the operation is flexible and convenient.
The clamp 4.2 comprises a clamping block 4.2.1, a connecting block 4.2.2, a guide rod 4.2.3, a spring 4.2.4 and a screw 4.2.5; the connecting blocks 4.2.2 are arranged on two sides of the sliding block 4.1, and the ends, far away from the sliding block 4.1, of the connecting blocks 4.2.2 are connected with the clamping blocks 4.2.1; the sliding block 4.1 is provided with a through hole with the diameter equal to the radial dimension of the guide rod 4.2.3, the connecting block 4.2.2 is provided with a through hole, the diameter of the end, close to the sliding block 4.1, of the through hole is equal to the diameter of the through hole of the sliding block 4.1, and the diameter of the end, far away from the sliding block 4.1, is larger than the radial dimension of the spring 4.2.4; the radial dimension of the spring 4.2.4 is larger than that of the guide rod 4.2.3 and smaller than that of the head of the screw 4.2.5, and the radial dimension of the head of the screw 4.2.5 is smaller than the diameter of the through hole on the connecting block 4.2.2 far away from the end of the sliding block 4.1; the guide rod 4.2.3 passes through the through holes on the sliding block 4.1 and the connecting block 4.2.2, the spring 4.2.4 is sleeved on the guide rod 4.2.3 and is arranged in the through hole of the connecting block 4.2.2, and the screw 4.2.5 is locked at the end parts of the two ends of the guide rod 4.2.3.
The connecting block 4.2.2 is provided with a hollowed observation window for observing the position of the terminal 5.1 to be detected; the positioning of the test wire connector 3 during testing is facilitated.
The clamping block 4.2.1 is provided with the friction-increasing soft rubber, so that the clamping reliability is improved, and the fixing device 4 is not easy to loosen.
A gasket 4.2.6 is further arranged between the screw 4.2.5 and the guide rod 4.2.3, the diameter of the outer edge of the gasket 4.2.6 is larger than the radial dimension of the spring 4.2.4 and smaller than the diameter of the through hole of the connecting block 4.2.2, and the diameter of the inner hole of the gasket 4.2.6 is smaller than the radial dimension of the head of the screw 4.2.5; the spacer 4.2.6 can better secure the spring 4.2.4 in the through hole of the connection block 4.2.2.
The device also contains binding post 7, as shown in fig. 6-7, binding post 7 is extension metal sleeve terminal, binding post 7 links to each other with test line joint 3, is used for connecting test line joint 3 and the terminal 5.1 that awaits measuring on the secondary terminal row 5, because use fixing device 4 to replace the manpower to be fixed in the secondary terminal row 5 with test line joint 3, the metal joint length of former test line 6 is insufficient, can't realize effective contact with terminal 5.1 on the secondary terminal row 5, consequently use binding post 7 to guarantee effective connection.
In the specific implementation process, the test line connector 3 needs to be connected to the terminal 5.1 corresponding to the secondary terminal row 5 of the high-voltage circuit breaker, the sub-channel 1.1 of the tester 1 is connected with the first terminal 2.1 of the change-over switch 2 through the test line 6, the combined channel 1.2 is connected with the third terminal 2.3 through the test line 6, the fourth terminal 2.4 and the sixth terminal 2.6 are connected with the test line connector 3 through the test line 6, the common channel 1.3 is connected with one test line connector 3, the second terminal 2.2 and the fifth terminal 2.5 are left empty, all the test line connectors 3 penetrate through the fixing holes of the fixing device 4 to be movably connected with the fixing device 4, the test line connectors 3 are in one-to-one correspondence with the positions of the terminals 5.1 to be tested, the positions of the terminals 5.1 to be tested are observed through the hollow observation windows on the connecting blocks, the fixing device 4 is pulled out of the clamping blocks 4.2.1, the fixing device 4 is clamped on the secondary terminal row 5, the positions of the test line connector 3 are finely adjusted through the moving blocks 4.1, and when the positions of the test line connector 3 are in the position of the test line connector 3 and the terminal connector 5.1 are in the correspondence with the test line connector 3, the test line connector 3 to be tightly pressed with the terminal 3 to be tested, and the test line connector 3 is effectively connected with the terminal 3 to be tested.
After connection, each test of the high-voltage circuit breaker is realized by switching different states of the change-over switch 2, the change-over switch 2 is switched to a closing channel, namely the contact piece 2.7 is rotated to a state of switching on the third terminal 2.3 and the fourth terminal 2.4 by rotating the rotating handle 2.8, and at the moment, the other two channels are in an open circuit state; similarly, when the breaker opening test is performed, the change-over switch 2 is switched to the opening channel, that is, the contact piece 2.7 is rotated to a state of switching on the first terminal 2.1 and the sixth terminal 2.6 by rotating the rotary handle 2.8; when the test is stopped, the transfer switch is switched to close the channels, namely the contact piece 2.7 is rotated to be in a state of being connected with the second terminal 2.2 and the fifth terminal 2.5 by rotating the rotary handle 2.8, and at the moment, the two channels are in an open state.
Example 2:
as shown in fig. 4 to 10, the present embodiment provides a mechanical characteristic test device for a high voltage circuit breaker.
The device comprises: the tester 1, the change-over switch 2, the test wire connector 3 and the test wire 6;
the tester 1 comprises a sub-channel 1.1, a combined channel 1.2 and a public channel 1.3, wherein the public channel 1.3 is connected with a test line connector 3 through a test line 6, the sub-channel 1.1 and the combined channel 1.2 are connected with one end of a change-over switch 2 through the test line 6, the other end of the change-over switch 2 is connected with the test line connector 3 through the test line 6, and a testing device is connected with a terminal 5.1 to be tested on a secondary terminal strip 5 through the test line connector 3.
The change-over switch 2 comprises a first terminal 2.1, a second terminal 2.2, a third terminal 2.3, a fourth terminal 2.4, a fifth terminal 2.5, a sixth terminal 2.6 and a contact piece 2.7;
the change-over switch 2 has three gear positions, the contact piece 2.7 is used for connecting the first terminal 2.1 and the sixth terminal 2.6 to form one gear position, the contact piece 2.7 is used for connecting the second terminal 2.2 and the fifth terminal 2.5 to form one gear position, the contact piece 2.7 is used for connecting the third terminal 2.3 and the fourth terminal 2.4 to form one gear position,
the first terminal 2.1 is connected with the sub-channel 1.1 on the tester 1 through the test wire 6, the third terminal 2.3 is connected with the combined channel 1.2 through the test wire 6, the fourth terminal 2.4 and the sixth terminal 2.6 are respectively connected with the test wire connector 3 through the test wire 6, and the second terminal 2.2 and the fifth terminal 2.5 are left empty.
As shown in fig. 10, the switch 2 is a push button switch, the switch 2 further includes a push button 2.9, the push button 2.9 is mechanically connected to the contact piece 2.7, and the position of the contact piece 2.7 is changed by pressing the push button 2.9, so as to realize gear switching.
The fourth terminal 2.4 and the sixth terminal 2.6 can respectively select the type of the access test line 6 according to the mechanism type of the tested breaker; the test line connected with the fourth terminal 2.4 or the sixth terminal 2.6 is mainly divided into two test lines of single line and one-to-three, wherein the single line is that the fourth terminal 2.4 or the sixth terminal 2.6 is respectively connected with one test line 6, the one-to-three is that the fourth terminal 2.4 or the sixth terminal 2.6 is respectively connected with three test lines 6, and the two wiring types are respectively used for a breaker operating mechanism with three-phase linkage and three-phase separation; when the circuit breakers of the three-phase linkage mechanism of the tested circuit breaker are such as most circuit breakers with voltage levels of 110kV and below, the fourth terminal 2.4 and the sixth terminal 2.6 are respectively connected with a test wire 6; if the tested circuit breaker is a three-phase separation mechanism, such as most circuit breakers with voltage levels of 220kV and above, the test line 6 connected with the test line connector 3 needs to be connected with three test lines 6 by a test connection wire with one third, namely, the fourth terminal 2.4 and the sixth terminal 2.6 are respectively connected with three test lines 6, and the three test line connectors 3 led out of the test lines 6 are respectively connected with connection terminals and are connected with the positive terminal of the A, B, C three-phase closing control circuit and the positive terminal of the A, B, C three-phase opening control circuit in parallel.
The device is also provided with a fixing device 4, the fixing device 4 is shown in fig. 4-5, the test wire connector 3 is movably connected with the fixing device 4, and the fixing device 4 can be fixed on a terminal strip 5 to be tested; the test line connector 3 is prevented from being pressed by a human hand during the test, and the damage to the hearing of a tester pressing the test line connector 3 caused by huge sound generated by a mechanism box when the mechanism box close to the circuit breaker acts is also prevented.
The fixing device 4 comprises a sliding block 4.1 and a clamp 4.2, a fixing hole is formed in the sliding block 4.1, and the test wire connector 3 is movably connected with the fixing device 4 through the fixing hole; the fixture 4.2 is adopted for fixation, so that the fixing device 4 can be conveniently fixed and moved, and the operation is flexible and convenient.
The clamp 4.2 comprises a clamping block 4.2.1, a connecting block 4.2.2, a guide rod 4.2.3, a spring 4.2.4 and a screw 4.2.5; the connecting blocks 4.2.2 are arranged on two sides of the sliding block 4.1, and the ends, far away from the sliding block 4.1, of the connecting blocks 4.2.2 are connected with the clamping blocks 4.2.1; the sliding block 4.1 is provided with a through hole with the diameter equal to the radial dimension of the guide rod 4.2.3, the connecting block 4.2.2 is provided with a through hole, the diameter of the end, close to the sliding block 4.1, of the through hole is equal to the diameter of the through hole of the sliding block 4.1, and the diameter of the end, far away from the sliding block 4.1, is larger than the radial dimension of the spring 4.2.4; the radial dimension of the spring 4.2.4 is larger than that of the guide rod 4.2.3 and smaller than that of the head of the screw 4.2.5, and the radial dimension of the head of the screw 4.2.5 is smaller than the diameter of the through hole on the connecting block 4.2.2 far away from the end of the sliding block 4.1; the guide rod 4.2.3 passes through the through holes on the sliding block 4.1 and the connecting block 4.2.2, the spring 4.2.4 is sleeved on the guide rod 4.2.3 and is arranged in the through hole of the connecting block 4.2.2, and the screw 4.2.5 is locked at the end parts of the two ends of the guide rod 4.2.3.
The connecting block 4.2.2 is provided with a hollowed observation window for observing the position of the terminal 5.1 to be detected; the positioning of the test wire connector 3 during testing is facilitated.
The clamping block 4.2.1 is provided with the friction-increasing soft rubber, so that the clamping reliability is improved, and the fixing device 4 is not easy to loosen.
A gasket 4.2.6 is further arranged between the screw 4.2.5 and the guide rod 4.2.3, the diameter of the outer edge of the gasket 4.2.6 is larger than the radial dimension of the spring 4.2.4 and smaller than the diameter of the through hole of the connecting block 4.2.2, and the diameter of the inner hole of the gasket 4.2.6 is smaller than the radial dimension of the head of the screw 4.2.5; the spacer 4.2.6 can better secure the spring 4.2.4 in the through hole of the connection block 4.2.2.
The device also contains binding post 7, and binding post 7 is as shown in fig. 6~7, and binding post 7 is the extension metal sleeve terminal for connect terminal 5.1 on test line joint 3 and the secondary terminal row 5, because use fixing device to replace the manpower to be fixed in the secondary terminal row 5 with test line joint 3, the metal joint length of former test line 6 is insufficient, can't realize effective contact with terminal 5.1 on the secondary terminal row 5, consequently use binding post 7 to guarantee effective connection.
In the specific implementation process, the test line connector 3 needs to be connected to the terminal 5.1 corresponding to the secondary terminal row 5 of the high-voltage circuit breaker, the sub-channel 1.1 of the tester 1 is connected with the first terminal 2.1 of the change-over switch 2 through the test line 6, the combined channel 1.2 is connected with the third terminal 2.3 through the test line 6, the fourth terminal 2.4 and the sixth terminal 2.6 are respectively connected with the test line connector 3 through the test line 6, the common channel 1.3 is connected with one test line connector 3, the second terminal 2.2 and the fifth terminal 2.5 are left empty, all the test line connectors 3 penetrate through the fixing holes of the fixing device 4 to be movably connected with the fixing device 4, the test line connectors 3 are in one-to-one correspondence with the positions of the terminals 5.1 to be tested, the positions of the terminals 5.1 to be tested are observed through the hollow observation windows on the connecting blocks, the fixing device 4 is pulled out of the clamping blocks 4.2.1, the fixing device 4 is clamped on the terminal row 5, the sliding blocks are moved to finely adjust the positions of the test line connectors 3, and when the positions of the test line connectors 3 are corresponding to the terminals 5.1 to be tested, the terminals 3 are pressed tightly, and the test line connectors are connected with the terminals 3 to be tested, so that the test line connectors are effectively pressed.
After connection, various tests of the high-voltage circuit breaker are realized by switching different states of the change-over switch 2, the change-over switch 2 is switched to a closing channel, namely the contact piece 2.7 is pressed to a state of connecting the third terminal 2.3 and the fourth terminal 2.4 by pressing the button 2.9, and at the moment, the other two channels are in an open circuit state; similarly, when the breaker opening test is performed, the change-over switch 2 is switched to the opening channel, that is, the contact piece 2.7 is rotated to a state of switching on the first terminal 2.1 and the sixth terminal 2.6 by pressing the button 2.9; when the test is stopped, the transfer switch is switched to the closed channel, namely the contact piece 2.7 is switched to the state of being connected with the second terminal 2.2 and the fifth terminal 2.5 by pressing the button 2.9, and at the moment, the two channels of opening and closing are in an open state.
The same or similar reference numerals correspond to the same or similar components;
the terms describing the positional relationship in the drawings are merely illustrative, and are not to be construed as limiting the present patent;
it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (6)
1. A high voltage circuit breaker mechanical property test apparatus, the apparatus comprising: the device comprises a tester (1), a change-over switch (2), a test wire connector (3) and a test wire (6);
the tester (1) comprises a sub-channel (1.1), a combined channel (1.2) and a public channel (1.3), wherein the public channel (1.3) is connected with a test line connector (3) through a test line (6), the sub-channel (1.1) and the combined channel (1.2) are connected with one end of a change-over switch (2) through the test line (6), the other end of the change-over switch (2) is connected with the test line connector (3) through the test line (6), and the tester (1) is connected with a terminal (5.1) to be tested on a secondary terminal strip through the test line connector (3);
the change-over switch (2) comprises a first terminal (2.1), a second terminal (2.2), a third terminal (2.3), a fourth terminal (2.4), a fifth terminal (2.5), a sixth terminal (2.6) and a contact piece (2.7);
the change-over switch (2) comprises three gears, the contact piece (2.7) is connected with the first terminal (2.1) and the sixth terminal (2.6) to be one gear, the contact piece (2.7) is connected with the second terminal (2.2) and the fifth terminal (2.5) to be one gear, the contact piece (2.7) is connected with the third terminal (2.3) and the fourth terminal (2.4) to be one gear, the first terminal (2.1) is connected with a sub-channel (1.1) on the tester (1) through a test wire (6), the third terminal (2.3) is connected with the sub-channel (1.2) through the test wire (6), the fourth terminal (2.4) and the sixth terminal (2.6) are connected with the test wire connector (3) through the test wire (6), and the second terminal (2.2) and the fifth terminal (2.5) are left empty;
the device is also provided with a fixing device (4), the test wire connector (3) is movably connected with the fixing device (4), and the fixing device (4) is fixed on the secondary terminal strip (5);
the fixing device (4) comprises a sliding block (4.1) and a clamp (4.2), a fixing hole is formed in the sliding block (4.1), and the test wire connector (3) penetrates through the fixing hole and is movably connected with the fixing device (4);
the clamp (4.2) comprises a clamping block (4.2.1), a connecting block (4.2.2), a guide rod (4.2.3), a spring (4.2.4) and a screw (4.2.5); the connecting blocks (4.2.2) are arranged on two sides of the sliding block (4.1), and the ends, far away from the sliding block (4.1), of the connecting blocks (4.2.2) are connected with the clamping blocks (4.2.1);
the sliding block (4.1) is provided with a through hole with the diameter equal to the radial size of the guide rod (4.2.3), the connecting block (4.2.2) is provided with a through hole, the diameter of the end, close to the sliding block (4.1), of the through hole of the connecting block is equal to the diameter of the through hole of the sliding block (4.1), and the diameter of the end, far away from the sliding block (4.1), is larger than the radial size of the spring (4.2.4);
the radial dimension of the spring (4.2.4) is larger than the radial dimension of the guide rod (4.2.3) and smaller than the radial dimension of the head of the screw (4.2.5), and the radial dimension of the head of the screw (4.2.5) is smaller than the diameter of the through hole on the connecting block (4.2.2) far away from the end of the sliding block (4.1);
the guide rod (4.2.3) passes through the through holes on the sliding block (4.1) and the connecting block (4.2.2), the spring (4.2.4) is sleeved on the guide rod (4.2.3), and is arranged in the through hole of the connecting block (4.2.2), and the screw (4.2.5) is locked at the end parts of the two ends of the guide rod (4.2.3);
the connecting block (4.2.2) is provided with a hollowed-out observation window for observing the position of the terminal to be detected;
and the clamping block (4.2.1) is provided with a friction-increasing soft rubber.
2. The mechanical characteristic test device of the high-voltage circuit breaker according to claim 1, wherein the change-over switch (2) is a rotary switch, the change-over switch further comprises a rotary handle (2.8), the rotary handle (2.8) is mechanically connected with the contact piece (2.7), the contact piece (2.7) is driven to rotate by rotating the rotary handle (2.8), and the position of the contact piece (2.7) is changed to realize gear switching.
3. The mechanical characteristic test device of the high-voltage circuit breaker according to claim 1, wherein the change-over switch (2) is a push-button switch, the change-over switch (2) further comprises a push button (2.9), the push button (2.9) is mechanically connected with the contact piece (2.7), and the position of the contact piece (2.7) is changed by pressing the push button (2.9) to realize gear change.
4. The device according to claim 1, characterized in that the fourth terminal (2.4) and the sixth terminal (2.6) are chosen to be connected to the number of test lines (6) according to the type of mechanism of the circuit breaker under test, respectively.
5. The mechanical property test device of the high-voltage circuit breaker according to claim 1, wherein a gasket (4.2.6) is further arranged between the screw (4.2.5) and the guide rod (4.2.3), the diameter of the outer edge of the gasket (4.2.6) is larger than the radial dimension of the spring (4.2.4) and smaller than the diameter of the through hole of the connecting block (4.2.2), and the diameter of the inner hole of the gasket (4.2.6) is smaller than the radial dimension of the head of the screw (4.2.5).
6. The device according to claim 1, further comprising a connection terminal (7), wherein the connection terminal is an elongated metal sleeve terminal, the connection terminal (7) is connected with the test wire connector (3), and the connection terminal (7) is used for connecting the test wire connector (3) with a terminal to be tested on the secondary terminal block.
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| CN201811435164.1A CN109406126B (en) | 2018-11-28 | 2018-11-28 | Mechanical characteristic test device for high-voltage circuit breaker |
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| CN201811435164.1A CN109406126B (en) | 2018-11-28 | 2018-11-28 | Mechanical characteristic test device for high-voltage circuit breaker |
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| CN109406126B true CN109406126B (en) | 2023-12-29 |
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| CN110686888B (en) * | 2019-11-07 | 2020-08-04 | 广东电网有限责任公司 | Method for judging just opening and just closing point of circuit breaker |
| CN111679182B (en) * | 2020-06-30 | 2023-11-07 | 广东电网有限责任公司 | Wiring auxiliary tool and wiring method for breaker switching characteristic test |
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