CN114019330A - Series resonance method alternating current withstand voltage test device and calculation method - Google Patents
Series resonance method alternating current withstand voltage test device and calculation method Download PDFInfo
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- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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Abstract
The invention belongs to the technical field of high-voltage test equipment, in particular to a series resonance method alternating-current voltage withstand test device and a calculation method, and aims at solving the problem that the existing test device is inconvenient to adjust the height. The device has the advantages of compact structure, reasonable design and convenient and fast operation, can freely adjust the height of the test device, and can stably fix the position of the test device, thereby solving the problem that workers need to bend down to operate, and being beneficial to the use of people.
Description
Technical Field
The invention relates to the technical field of high-voltage test equipment, in particular to a series resonance method alternating current withstand voltage test device and a calculation method.
Background
The voltage withstand test is one of the main methods for testing overvoltage bearing capacity of electric appliances, electric equipment, electric devices, electric circuits, electrical safety appliances and the like, and comprises a power frequency voltage withstand test and a direct current voltage withstand test, wherein the test voltage of the power frequency voltage withstand test is one time to several times of the rated voltage of the tested equipment and is not lower than 1000V, and the direct current voltage withstand test can draw a leakage current-voltage characteristic curve through the numerical value of leakage current at different test voltages.
The patent with publication number CN213957432U discloses a frequency conversion series resonance alternating current withstand voltage test device, including test device body and base, the lower surface rigid coupling of test device body has a plurality of bases, dust keeper is installed to the inside below of test device body. This frequency conversion series resonance exchanges withstand voltage test device through mutually supporting between first L shaped plate, filter, spring and otter board isotructure, can make second L shaped plate pass through the elasticity performance of spring and fix the filter. However, the existing testing device is fixed in height, and people with too high height may need to bend down to operate, so that the labor intensity of work is increased, and an improvement space exists.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a series resonance method alternating current withstand voltage test device and a calculation method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a series resonance method alternating current withstand voltage test device comprises a test device body, wherein an adjusting shell is arranged under the test device body, slide rails are fixedly connected to the inner walls of the left side and the right side of the adjusting shell, two rectangular holes are formed in the upper surface of the adjusting shell, supporting plates are slidably mounted in the two rectangular holes, the bottom ends of the two supporting plates extend into the adjusting shell, the top ends of the two supporting plates extend to the upper side of the adjusting shell and are fixedly connected with a same operation table, the test device body is fixedly connected to the upper surface of the operation table, a plurality of buffer springs are uniformly and fixedly connected between the lower surface of the operation table and the upper surface of the adjusting shell at equal intervals, the buffer springs are positioned between the two supporting plates, guide plates are fixedly connected to the bottom of one side, away from each other, of the two supporting plates are respectively slidably mounted on the two slide rails, and a transmission block is fixedly connected to one side of the two supporting plates, rotate between the both sides inner wall of adjusting the shell and be connected with two straight-bars, equal fixed cover is equipped with the transfer line on two straight-bars, the inclined hole has all been seted up on two transfer lines, and two transmission piece difference slidable mounting are in two inclined holes, two metal columns of the top inner wall fixedly connected with of adjusting the shell, the same baffle of the bottom fixedly connected with of two metal columns, the equal fixedly connected with pulley in both sides of baffle, the sliding sleeve is equipped with same clamp plate on two metal columns, and the top of two transfer lines all contacts with the lower surface of clamp plate, movable cover is equipped with metal spring on the metal column, and metal spring's both ends difference fixed connection is in the top of baffle and the bottom of clamp plate, straight hole has been seted up to the right side bottom of adjusting the shell, two-way lead screw is installed to the straight downthehole internal rotation.
Preferably, the right-hand member of two-way lead screw extends to outside the adjusting casing, and fixedly connected with turning handle, and one side that the turning handle is close to the adjusting casing uses two-way lead screw as central annular array to seted up a plurality of restriction grooves, and the left end of two-way lead screw is rotated and is connected on the left side inner wall of adjusting the casing.
Preferably, the two-way screw rod is provided with two movable plates in a threaded sleeve mode, and the lower surfaces of the two movable plates are fixedly connected with square blocks.
Preferably, two placing grooves are formed in the inner wall of the bottom of the adjusting hole, and the two squares are respectively slidably mounted in the two placing grooves.
Preferably, the top of one side that two fly leafs are close to each other is the one end of the equal fixedly connected with haulage rope, and the other end of two haulage ropes is respectively through two pulleys, and equal fixed connection is at the lower surface of clamp plate.
Preferably, the right side of the adjusting shell is fixedly connected with a rectangular rod, the rectangular rod is located above the rotating handle, and the right end of the rectangular rod is fixedly connected with a rectangular block.
Preferably, the rectangular rod is slidably sleeved with a sliding plate, the bottom of the right side of the sliding plate is fixedly connected with a limiting block, and the limiting block is matched with the limiting groove.
Preferably, two return springs are fixedly connected between the right side of the adjusting shell and the left side of the sliding plate, and the rectangular rod is located between the two return springs.
A calculation method for an alternating current withstand voltage test by a series resonance method comprises the following calculation steps:
s1, during insulation resistance test, the capacitance C of the tested object is tested to be 280 nF;
s2 estimating loop current I-2 pi fCU, where f is test frequency, C is test capacitance, U is test voltage, I-2 pi fCU-314 × 280 × 10-9×17.4×103＝1.52A；
The loop current of S3 is 1.52A >1A, the rated voltage of the single reactor is 27KV >17.4KV, so the parallel connection mode of two reactors can be selected;
and S4 frequency checking: the inductance of the single reactor is 95H, the parallel inductance is 47.5H, and the series resonance condition omega 2LC is 1, at which time the test frequency should be
Checking and calculating loop current of S5: when the frequency of the power supply is 43.6Hz, the loop current I is 2 pi fCU is 6.28X 43.6X 280X 10 at 17.4KV-9×17.4×103＝1.33A＜2A。
In the invention, when the series resonance method alternating current withstand voltage test device is used, the sliding plate is pushed leftwards, so that the limiting block fixedly connected to the right side of the sliding plate can be driven to move leftwards, the return spring is compressed, when the limiting block moves out of the limiting groove, the limitation on the rotating handle is removed, the rotating handle is rotated to drive the bidirectional screw rod fixedly connected with the rotating handle to rotate, the square block can only horizontally move because the square block is slidably arranged in the placing groove, so that the movable plate fixedly connected with the square block can only horizontally move, the movable plate is sleeved on the bidirectional screw rod in a threaded manner, so that the two movable plates can be driven to horizontally move along with the rotation of the bidirectional screw rod and are far away from each other, the pressure plate is sleeved on the two metal columns in a sliding manner, the pressure plate can only vertically move, and the connection relationship among the pressure plate, the traction rope and the movable plates moves along with the movement of the movable plates, the pressing plate can be pulled by the traction rope to move downwards and compress the metal spring;
because the top ends of the two transmission rods are contacted with the lower surface of the pressing plate, the top ends of the two transmission rods can be extruded along with the downward movement of the pressing plate, so that the two transmission rods respectively reversely rotate by taking the two straight rods as centers, the guide plate can only vertically move because the guide plate is slidably arranged on the slide rail, the support plate can only vertically move because of the fixed connection relationship among the guide plate, the support plate and the transmission block, and the operation table and the test device body can be driven to upwards move along with the rotation of the transmission rods because of the connection relationship among the transmission block, the inclined holes and the transmission rods because of the fixed connection relationship among the guide plate, the support plate and the test device body, and the rotation handle can be stopped when the test device body moves to a proper height, then the sliding plate is loosened, the sliding plate is pushed to move rightwards due to the elastic restoring force of the return spring, and then the limiting block is driven to move rightwards, so that the limiting block is inserted into the limiting groove, the rotation of the rotating handle is limited, and the testing device body is fixed at the current height.
Drawings
FIG. 1 is a schematic structural diagram of an AC voltage withstand test device using a series resonance method according to the present invention;
FIG. 2 is a schematic structural diagram of a portion A of FIG. 1 of an AC withstand voltage test apparatus using a series resonance method according to the present invention;
FIG. 3 is a schematic structural diagram of a portion B of the series resonance method AC withstand voltage test apparatus shown in FIG. 1;
FIG. 4 is a schematic structural diagram of a portion C in FIG. 1 of an AC withstand voltage test apparatus using a series resonance method according to the present invention;
fig. 5 is a schematic structural diagram of a portion D in fig. 1 of an ac voltage withstand test apparatus according to a series resonance method in accordance with the present invention.
In the figure: the device comprises a test device body 1, an adjusting shell 2, a sliding rail 3, a rectangular hole 4, a supporting plate 5, an operation table 6, a buffer spring 7, a guide plate 8, a transmission block 9, a straight rod 10, a transmission rod 11, an inclined hole 12, a metal column 13, a baffle plate 14, a pulley 15, a pressing plate 16, a metal spring 17, a straight hole 18, a bidirectional screw rod 19, a rotating handle 20, a limiting groove 21, a movable plate 22, a square block 23, a placing groove 24, a traction rope 25, a rectangular rod 26, a rectangular block 27, a sliding plate 28, a limiting block 29 and a return spring 30.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1-5, a series resonance method alternating current withstand voltage test device comprises a test device body 1, an adjusting shell 2 is arranged under the test device body 1, slide rails 3 are fixedly connected to the inner walls of the left side and the right side of the adjusting shell 2, two rectangular holes 4 are formed in the upper surface of the adjusting shell 2, support plates 5 are slidably mounted in the two rectangular holes 4, the bottom ends of the two support plates 5 extend into the adjusting shell 2, the top ends of the two support plates 5 extend above the adjusting shell 2 and are fixedly connected with a same operating platform 6, the test device body 1 is fixedly connected to the upper surface of the operating platform 6, a plurality of buffer springs 7 are uniformly and fixedly connected between the lower surface of the operating platform 6 and the upper surface of the adjusting shell 2 at equal intervals, the buffer springs 7 are located between the two support plates 5, and the arrangement of the buffer springs 7 can enable the operating platform 6 to move more stably, the bottom of one side, far away from each other, of each of the two support plates 5 is fixedly connected with a guide plate 8, the two guide plates 8 are respectively and slidably mounted on the two slide rails 3, one side of each of the two support plates 5 is fixedly connected with a transmission block 9, two straight rods 10 are rotatably connected between the inner walls of the two sides of the adjusting shell 2, transmission rods 11 are fixedly sleeved on the two straight rods 10, inclined holes 12 are respectively formed in the two transmission rods 11, the two transmission blocks 9 are respectively and slidably mounted in the two inclined holes 12, the inner wall of the top of the adjusting shell 2 is fixedly connected with two metal columns 13, the bottom ends of the two metal columns 13 are fixedly connected with a same baffle plate 14, pulleys 15 are respectively and fixedly connected with the two sides of the baffle plate 14, the two metal columns 13 are slidably sleeved with a same pressing plate 16, the top ends of the two transmission rods 11 are both contacted with the lower surface of the pressing plate 16, and metal springs 17 are movably sleeved on the metal columns 13, and both ends of the metal spring 17 are respectively and fixedly connected with the top of the baffle plate 14 and the bottom of the pressing plate 16, the elastic restoring force of the metal spring 17 can enable the pressing plate 16 to move vertically and upwards, a straight hole 18 is formed in the bottom of the right side of the adjusting shell 2, a bidirectional screw rod 19 is rotatably mounted in the straight hole 18, and the bidirectional screw rod 19 can freely rotate in the straight hole 18.
Example two
In the invention, the right end of the bidirectional screw rod 19 extends out of the adjusting shell 2 and is fixedly connected with a rotating handle 20, one side of the rotating handle 20 close to the adjusting shell 2 is provided with a plurality of limiting grooves 21 in an annular array by taking the bidirectional screw rod 19 as a center, the left end of the bidirectional screw rod 19 is rotatably connected on the inner wall of the left side of the adjusting shell 2, and the rotating handle 20 is rotated to drive the bidirectional screw rod 19 to rotate.
In the invention, two movable plates 22 are sleeved on the bidirectional screw rod 19 in a threaded manner, the lower surfaces of the two movable plates 22 are fixedly connected with the square blocks 23, and the square blocks 23 are arranged, so that the movable plates 22 can only horizontally move.
In the invention, two placing grooves 24 are formed in the inner wall of the bottom of the adjusting hole 2, two blocks 23 are respectively and slidably mounted in the two placing grooves 24, and the blocks 23 can only horizontally move in the placing grooves 24.
In the invention, the tops of the two movable plates 22 close to each other are fixedly connected with one ends of the hauling ropes 25, the other ends of the two hauling ropes 25 respectively pass through the two pulleys 15 and are fixedly connected to the lower surface of the pressing plate 16, and the movable plates 22 move horizontally and can pull the pressing plate 16 to move downwards through the hauling ropes 25.
In the invention, the right side of the adjusting shell 2 is fixedly connected with a rectangular rod 26, the rectangular rod 26 is positioned above the rotating handle 20, the right end of the rectangular rod 26 is fixedly connected with a rectangular block 27, and the arrangement of the rectangular block 27 can prevent the sliding plate 28 from falling off.
In the invention, the rectangular rod 26 is slidably sleeved with the sliding plate 28, the right bottom of the sliding plate 28 is fixedly connected with the limiting block 29, and the limiting block 29 and the limiting groove 21 are matched with the sliding plate 28 to horizontally move along the rectangular rod 26, so that the limiting block 29 can be driven to horizontally move, and the limiting block 29 is inserted into or removed from the limiting groove 21.
In the invention, two return springs 30 are fixedly connected between the right side of the adjusting shell 2 and the left side of the sliding plate 28, the rectangular rod 26 is positioned between the two return springs 30, and the elastic restoring force of the return springs 30 can push the sliding plate 28 to move rightwards.
A calculation method for an alternating current withstand voltage test by a series resonance method comprises the following calculation steps:
s1, during insulation resistance test, the capacitance C of the tested object is tested to be 280 nF;
s2 estimating loop current I-2 pi fCU, where f is test frequency, C is test capacitance, U is test voltage, I-2 pi fCU-314 × 280 × 10-9×17.4×103＝1.52A；
The loop current of S3 is 1.52A >1A, the rated voltage of the single reactor is 27KV >17.4KV, so the parallel connection mode of two reactors can be selected;
and S4 frequency checking: the inductance of a single reactor is 95H, the parallel inductance is 47.5H, and the series resonance condition is omega2LC is 1, in which case the test frequency should be
Checking and calculating loop current of S5: when the frequency of the power supply is 43.6Hz, the loop current I is 2 pi fCU is 6.28X 43.6X 280X 10 at 17.4KV-9×17.4×103＝1.33A＜2A。
EXAMPLE III
Referring to fig. 1-5, a series resonance method alternating current withstand voltage test device comprises a test device body 1, an adjusting shell 2 is arranged under the test device body 1, slide rails 3 are welded on the inner walls of the left side and the right side of the adjusting shell 2, two rectangular holes 4 are chiseled on the upper surface of the adjusting shell 2, support plates 5 are slidably mounted in the two rectangular holes 4, the bottom ends of the two support plates 5 extend into the adjusting shell 2, the top ends of the two support plates 5 extend above the adjusting shell 2 and are welded with a same operating platform 6, the test device body 1 is welded on the upper surface of the operating platform 6, a plurality of buffer springs 7 are uniformly welded between the lower surface of the operating platform 6 and the upper surface of the adjusting shell 2 at equal intervals, the buffer springs 7 are positioned between the two support plates 5, guide plates 8 are welded on the bottom of the side, away from each other, and the two guide plates 8 are slidably mounted on the two slide rails 3 respectively, a transmission block 9 is welded on one side of each of the two support plates 5, two straight rods 10 are rotatably connected between the inner walls of the two sides of the adjusting shell 2, transmission rods 11 are fixedly sleeved on the two straight rods 10, inclined holes 12 are chiseled on the two transmission rods 11, and the two transmission blocks 9 are respectively arranged in the two inclined holes 12 in a sliding way, the inner wall of the top part of the adjusting shell 2 is welded with two metal columns 13, the bottom ends of the two metal columns 13 are welded with the same baffle plate 14, the two sides of the baffle plate 14 are both welded with pulleys 15, the two metal columns 13 are sleeved with the same pressing plate 16 in a sliding way, the top ends of the two transmission rods 11 are both contacted with the lower surface of the pressure plate 16, the metal column 13 is movably sleeved with a metal spring 17, and both ends of the metal spring 17 are respectively welded at the top of the baffle plate 14 and the bottom of the pressure plate 16, a straight hole 18 is chiseled at the bottom of the right side of the adjusting shell 2, and a bidirectional screw rod 19 is rotatably installed in the straight hole 18.
In the invention, the right end of the bidirectional screw rod 19 extends out of the adjusting shell 2, the rotating handle 20 is welded, a plurality of limiting grooves 21 are chiseled on one side of the rotating handle 20 close to the adjusting shell 2 in an annular array by taking the bidirectional screw rod 19 as a center, and the left end of the bidirectional screw rod 19 is rotatably connected to the inner wall of the left side of the adjusting shell 2.
In the invention, two movable plates 22 are sleeved on the bidirectional screw rod 19 in a threaded manner, and squares 23 are welded on the lower surfaces of the two movable plates 22.
In the invention, two placing grooves 24 are chiseled on the inner wall of the bottom of the adjusting hole 2, and two blocks 23 are respectively and slidably installed in the two placing grooves 24.
In the invention, one ends of the hauling ropes 25 are welded on the tops of the two movable plates 22 close to each other, and the other ends of the two hauling ropes 25 pass through the two pulleys 15 respectively and are welded on the lower surface of the pressure plate 16.
In the invention, a rectangular rod 26 is welded on the right side of the adjusting shell 2, the rectangular rod 26 is positioned above the rotating handle 20, and a rectangular block 27 is welded on the right end of the rectangular rod 26.
In the invention, a sliding plate 28 is slidably sleeved on the rectangular rod 26, a limiting block 29 is welded at the bottom of the right side of the sliding plate 28, and the limiting block 29 is matched with the limiting groove 21.
In the present invention, two return springs 30 are welded between the right side of the adjusting case 2 and the left side of the slide plate 28, and the rectangular bar 26 is located between the two return springs 30.
A calculation method for an alternating current withstand voltage test by a series resonance method comprises the following calculation steps:
s1, during insulation resistance test, the capacitance C of the tested object is tested to be 280 nF;
s2 estimating loop current I-2 pi fCU, where f is test frequency, C is test capacitance, U is test voltage, I-2 pi fCU-314 × 280 × 10-9×17.4×103＝1.52A；
The loop current of S3 is 1.52A >1A, the rated voltage of the single reactor is 27KV >17.4KV, so the parallel connection mode of two reactors can be selected;
and S4 frequency checking: the inductance of a single reactor is 95H, the parallel inductance is 47.5H, and the series resonance condition is omega2LC is 1, in which case the test frequency should be
Checking and calculating loop current of S5: when the frequency of the power supply is 43.6Hz, the loop current I is 2 pi fCU is 6.28X 43.6X 280X 10 at 17.4KV-9×17.4×103＝1.33A＜2A。
Therefore, 2 reactors are selected for the cable test sample to be connected in parallel to be used as the resonant reactor, when the frequency calculated in step S4 is greater than 300Hz, the inductance is increased to reduce the resonant frequency, when the frequency is less than 20Hz, the inductance is reduced to increase the resonant frequency, and then the next checking is carried out.
In the invention, when in use, the sliding plate 28 is pushed leftwards, so that the limiting block 29 fixedly connected to the right side of the sliding plate 28 can be driven to move leftwards, the return spring 30 is compressed, when the limiting block 29 moves out of the limiting groove 21, the limitation on the rotating handle 20 is removed, the rotating handle 20 is rotated, the bidirectional screw rod 19 fixedly connected with the rotating handle 20 is driven to rotate, the square 23 is slidably arranged in the placing groove 24, so that the square 23 can only move horizontally, the movable plate 22 fixedly connected with the square 23 can only move horizontally, the movable plate 22 is sleeved on the bidirectional screw rod 19 through threads, so that the two movable plates 22 can be driven to move horizontally and far away from each other along with the rotation of the bidirectional screw rod 19, the pressure plate 16 is slidably sleeved on the two metal columns 13, so that the pressure plate 16 can only move vertically, and along with the movement of the movable plate 22 due to the connection relationship among the pressure plate 16, the traction rope 25 and the movable plate 22, the pressing plate 16 can be pulled to move downwards through the pulling rope 25 and the metal spring 17 is compressed;
because the top ends of the two transmission rods 11 are both contacted with the lower surface of the pressing plate 16, the top ends of the two transmission rods 11 can be extruded along with the downward movement of the pressing plate 16, so that the two transmission rods 11 respectively rotate reversely by taking the two straight rods 10 as centers, and because the guide plate 8 is slidably mounted on the slide rail 3, the guide plate 8 can only move vertically, because of the fixed connection relationship among the guide plate 8, the support plate 5 and the transmission block 9 can only move vertically, because of the connection relationship among the transmission block 9, the inclined hole 12 and the transmission rods 11, the transmission block 9 can be driven to move vertically and upwardly through the inclined hole 12 along with the rotation of the transmission rods 11, so that the support plate 5 can move upwardly, and because of the fixed connection relationship among the support plate 5, the operation table 6 and the test device body 1 can be driven to move upwardly, when the test device body 1 moves to a proper height, the rotation of the rotating handle 20 is stopped, then the sliding plate 28 is released, the sliding plate 28 is pushed to move rightwards due to the elastic restoring force of the return spring 30, and then the limiting block 29 is driven to move rightwards, so that the limiting block 29 is inserted into the limiting groove 21, the rotation of the rotating handle 20 is limited, and the test device body 1 is fixed at the current height.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The series resonance method alternating current withstand voltage test device comprises a test device body (1) and is characterized in that an adjusting shell (2) is arranged under the test device body (1), slide rails (3) are fixedly connected to the inner walls of the left side and the right side of the adjusting shell (2), two rectangular holes (4) are formed in the upper surface of the adjusting shell (2), support plates (5) are slidably mounted in the two rectangular holes (4), the bottom ends of the two support plates (5) extend into the adjusting shell (2), the top ends of the two support plates (5) extend above the adjusting shell (2), the same operating platform (6) is fixedly connected, the test device body (1) is fixedly connected to the upper surface of the operating platform (6), a plurality of buffer springs (7) are uniformly and fixedly connected between the lower surface of the operating platform (6) and the upper surface of the adjusting shell (2) at equal intervals, and the buffer spring (7) is positioned between the two supporting plates (5), the bottom of one side, away from each other, of the two supporting plates (5) is fixedly connected with a guide plate (8), the two guide plates (8) are respectively and slidably mounted on the two sliding rails (3), one side of the two supporting plates (5) is respectively and fixedly connected with a transmission block (9), two straight rods (10) are rotatably connected between the inner walls of the two sides of the adjusting shell (2), the two straight rods (10) are respectively and fixedly sleeved with a transmission rod (11), the two transmission rods (11) are respectively provided with an inclined hole (12), the two transmission blocks (9) are respectively and slidably mounted in the two inclined holes (12), the inner wall of the top of the adjusting shell (2) is fixedly connected with two metal columns (13), the bottom ends of the two metal columns (13) are fixedly connected with the same baffle (14), the two sides of the baffle (14) are respectively and fixedly connected with pulleys (15), sliding sleeve is equipped with same clamp plate (16) on two metal column (13), and the top of two transfer lines (11) all contacts with the lower surface of clamp plate (16), and the activity cover is equipped with metal spring (17) on metal column (13), and the both ends difference fixed connection of metal spring (17) is in the top of baffle (14) and the bottom of clamp plate (16), and straight hole (18) have been seted up to the right side bottom of adjusting shell (2), and two-way lead screw (19) are installed to straight hole (18) internal rotation.
2. The series resonance method alternating current voltage withstand test device according to claim 1, wherein the right end of the bidirectional screw rod (19) extends out of the adjusting shell (2) and is fixedly connected with a rotating handle (20), one side of the rotating handle (20) close to the adjusting shell (2) is provided with a plurality of limiting grooves (21) in an annular array by taking the bidirectional screw rod (19) as a center, and the left end of the bidirectional screw rod (19) is rotatably connected to the inner wall of the left side of the adjusting shell (2).
3. The series resonance method alternating current voltage withstand test device according to claim 1, wherein the bidirectional screw rod (19) is threaded with two movable plates (22), and the lower surfaces of the two movable plates (22) are fixedly connected with a square block (23).
4. The series resonance method alternating current voltage withstand test device according to claim 1, wherein two placing grooves (24) are formed in the inner wall of the bottom of the adjusting hole (2), and the two blocks (23) are respectively slidably mounted in the two placing grooves (24).
5. The series resonance method alternating current voltage withstand test device and the calculation method according to claim 3, wherein one end of a traction rope (25) is fixedly connected to the top of one side of the two movable plates (22) close to each other, and the other ends of the two traction ropes (25) respectively pass through the two pulleys (15) and are fixedly connected to the lower surface of the pressure plate (16).
6. The series resonance method alternating current voltage withstand test device according to claim 1, wherein a rectangular rod (26) is fixedly connected to the right side of the adjusting shell (2), the rectangular rod (26) is located above the rotating handle (20), and a rectangular block (27) is fixedly connected to the right end of the rectangular rod (26).
7. The series resonance method alternating current voltage withstand test device according to claim 6, wherein a sliding plate (28) is slidably sleeved on the rectangular rod (26), a limiting block (29) is fixedly connected to the bottom of the right side of the sliding plate (28), and the limiting block (29) is matched with the limiting groove (21).
8. The series resonance method alternating current voltage withstand test device according to claim 1, wherein two return springs (30) are fixedly connected between the right side of the adjusting housing (2) and the left side of the sliding plate (28), and the rectangular rod (26) is located between the two return springs (30).
9. A calculation method for an alternating current withstand voltage test by a series resonance method is characterized by comprising the following calculation steps:
s1, during insulation resistance test, the capacitance C of the tested object is tested to be 280 nF;
s2 estimating loop current I-2 pi fCU, where f is test frequency, C is test capacitance, U is test voltage, I-2 pi fCU-314 × 280 × 10-9×17.4×103＝1.52A；
The loop current of S3 is 1.52A >1A, the rated voltage of the single reactor is 27KV >17.4KV, so the parallel connection mode of two reactors can be selected;
and S4 frequency checking: the inductance of a single reactor is 95H, the parallel inductance is 47.5H, and the series resonance condition is omega2LC is 1, in which case the test frequency should be
Checking and calculating loop current of S5: when the frequency of the power supply is 43.6Hz, the loop current I is 2 pi fCU is 6.28X 43.6X 280X 10 at 17.4KV-9×17.4×103＝1.33A＜2A。
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| CN119716426A (en) * | 2024-12-24 | 2025-03-28 | 山东坤尚智能科技有限公司 | An externally applied withstand voltage test device for power transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160097798A1 (en) * | 2014-10-03 | 2016-04-07 | Instrument Manufacturing Company | Electrical Cable Diagnostic System |
| CN109521338A (en) * | 2018-11-27 | 2019-03-26 | 汪锐 | Frequency conversion parallel resonance pressure resistant test method based on Cascade boosting |
| WO2021093352A1 (en) * | 2019-11-13 | 2021-05-20 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Apparatus for improving tuning stability of series resonance test under small load |
| CN213398789U (en) * | 2020-10-16 | 2021-06-08 | 商丘市天正电力工程有限公司 | A frequency conversion series resonance withstand voltage test device |
| CN214622899U (en) * | 2021-04-13 | 2021-11-05 | 江苏苏电电气设备检测有限公司 | A frequency conversion series resonant AC withstand voltage test system |
-
2021
- 2021-11-09 CN CN202111319872.0A patent/CN114019330B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160097798A1 (en) * | 2014-10-03 | 2016-04-07 | Instrument Manufacturing Company | Electrical Cable Diagnostic System |
| CN109521338A (en) * | 2018-11-27 | 2019-03-26 | 汪锐 | Frequency conversion parallel resonance pressure resistant test method based on Cascade boosting |
| WO2021093352A1 (en) * | 2019-11-13 | 2021-05-20 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Apparatus for improving tuning stability of series resonance test under small load |
| CN213398789U (en) * | 2020-10-16 | 2021-06-08 | 商丘市天正电力工程有限公司 | A frequency conversion series resonance withstand voltage test device |
| CN214622899U (en) * | 2021-04-13 | 2021-11-05 | 江苏苏电电气设备检测有限公司 | A frequency conversion series resonant AC withstand voltage test system |
Non-Patent Citations (2)
| Title |
|---|
| 李书敏;: "用变频谐振方式进行高压设备交流耐压试验", 新疆电力技术, no. 03 * |
| 赖柏乐;孔德彭;罗杰;: "基于PLC的工频串联谐振试验装置设计", 机电工程, no. 02 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119716426A (en) * | 2024-12-24 | 2025-03-28 | 山东坤尚智能科技有限公司 | An externally applied withstand voltage test device for power transformer |
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