JP6440420B2 - Electrical test apparatus and electrical test method - Google Patents

Description

  The present invention relates to an electrical test apparatus and electrical test method used for testing electrical characteristics of high-voltage equipment.

  In general, for electrical components (bushings, epoxy seats, etc.) used in high-voltage equipment such as cable termination connections, commercial frequency withstand voltage tests, commercial frequency parts are used to confirm safety before use. Various electrical tests such as a discharge test and a lightning impulse withstand voltage test are performed. When such an electrical test is performed in air, air discharge and surface flashing occur from the charging section, sample protrusions, corners, or adhering foreign matter, so in general, in an insulating gas atmosphere with high dielectric strength. The test is performed in a state where the sample is arranged (for example, Patent Document 1).

Conventionally, in an electrical test apparatus, sulfur hexafluoride (SF ₆ ) is mainly used as an insulating gas. SF ₆ gas has a dielectric strength superior to natural gas such as dry air (oxygen: about 20%, nitrogen: about 80%) and nitrogen (N ₂ ) gas that does not contain moisture. This is because it is suitable as an insulating gas.
However, SF ₆ gas has a global warming potential of 23,900 times that of carbon dioxide, and is designated as a greenhouse gas subject to emission reduction in the Kyoto Protocol, and reduction in use is also required in the field of electrical testing. Therefore, the present applicant has proposed an electrical test apparatus using an insulating gas generated by ionization or bubbling without using SF ₆ gas (for example, Patent Documents 2 and 3).

Japanese Unexamined Patent Publication No. 7-140197 JP 2013-257172 A JP 2013-170868 A

  However, in the electrical test apparatuses described in Patent Documents 2 and 3, since an apparatus for performing ionization and bubbling is arranged in the test container, the cost of the apparatus increases and the structure in the test container becomes complicated and maintenance work is performed. Becomes complicated.

On the other hand, if a large-sized pressure vessel (for example, height: 2 m, weight: 1 ton) is used as the test vessel and the gas pressure in the test vessel can be maintained at a high pressure (eg, about 0.3 MPa), N Even when an insulating gas such as _two gases or dry air is used, a high dielectric strength can be obtained.
In this case, when installing the sample, for example, the upper portion of the pressure vessel (hereinafter referred to as “upper vessel”) is lifted and moved by a crane, and the lower portion of the pressure vessel (hereinafter referred to as “lower vessel”) is opened. After installing the sample, the work of sealing the pressure vessel by returning the upper vessel to the original position is performed.

  However, when a pressure vessel is used as a test vessel, complicated work is required. For example, when moving the upper container using a simple caster-mounted crane that is convenient at the work site and does not require rail laying, the moving direction is not stable due to the rocking of the casters, so the upper container is It will be difficult to return to the place.

An object of the present invention is to provide an electrical test apparatus and an electrical test method that can perform an electrical test without using SF ₆ gas and can improve workability during sample setting.

An electrical test apparatus according to the present invention comprises:
A pressure vessel having a lower container for containing the sample and an upper container for closing the opening of the lower container;
A voltage application unit for applying a voltage to the sample accommodated in the pressure vessel;
A crane part that lifts the upper container and moves in a horizontal direction, and an electrical test apparatus comprising:
The crane part is
A horizontally movable base;
A crane drive unit that is separably connected to the mount using a magnet and moves the mount in a certain direction.

The electrical test method according to the present invention comprises:
A pressure vessel having a lower container for containing the sample and an upper container for closing the opening of the lower container;
A voltage application unit for applying a voltage to the sample accommodated in the pressure vessel;
A gantry that is movable in a horizontal direction; a crane drive unit that is connected to the gantry and moves the gantry in a certain direction; and a crane unit that lifts the upper container and moves in a horizontal direction;
An electrical test method using an electrical test apparatus comprising:
A first step of connecting the gantry and the crane drive using a magnet;
A second step of lifting the upper container by the crane and moving it horizontally.
A third step of placing a sample inside the lower container;
A fourth step of moving the upper container horizontally by the crane part and returning it to the original position,
Wherein in the second step and the fourth step, characterized in that moving the platform with the crane driver.

According to the electrical test apparatus and electrical test method of the present invention, the electrical test can be performed without using SF ₆ gas by using the pressure vessel. Moreover, since the crane unit is moved using a crane drive unit such as an air cylinder, the upper container moving operation (including the alignment operation) can be performed easily and safely.

It is a figure which shows schematic structure of the electrical test apparatus which concerns on one embodiment of this invention. It is a figure which shows the detailed structure of a test container. It is a figure which shows the detailed structure of the connection part between electrodes. It is a figure which shows the detailed structure of a crane part. It is a figure which shows the connection / separation of the transformer side electrode and the container side electrode by the interelectrode connection part. It is a figure which shows the position adjustment operation | work of an upper side container and a lower side container.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a schematic configuration of an electrical test apparatus according to an embodiment of the present invention. As shown in FIG. 1, the electrical test apparatus 1 includes a test container 10, a voltage application unit 20, an interelectrode connection unit 30, a crane unit 40, and the like.

  The electrical test apparatus 1 includes, for example, a known bushing (cannula) including an insulator made of a high voltage electrode, an epoxy resin, etc. and an embedded metal fitting, or a known epoxy seat provided with an insulator made of an epoxy resin, etc., and an embedded metal fitting. This is a facility for conducting a commercial frequency partial discharge test using an electrical component such as a sample.

FIG. 2 is a diagram showing a detailed configuration of the test container 10. 2A is a view when the upper container 11 is fixed to the upper part of the lower container 12, and FIG. 2B is a view when the upper container 11 is lifted.
As shown in FIG. 2, the test container 10 includes an upper container 11 and a lower container 12. The test vessel 10 is a pressure vessel that can withstand a high pressure (for example, 0.2 to 0.5 MPa), and is a heavy object having a height of 2 m and a weight of 1 t, for example. The test container 10 is fixed to the pedestal 15, for example. In the space formed by the pedestal 15, the crane drive unit 43 is disposed.

The upper container 11 has an upper flange 111 formed at the lower end portion so as to project outward in the radial direction. The upper flange 111 has a plurality of bolt holes 111a (see FIG. 4B, for example, 20 at regular intervals) through which the bolts 13 are inserted. The upper flange 111 has a positioning hole 111b (see FIG. 4B) through which a guide bar 16 (see FIG. 6) described later is inserted when positioning the upper container 11 and the lower container 12. The positioning holes 111b are provided at two points symmetrical with respect to the central axis of the test container 10, for example.
The upper container 11 has locking portions 113 (for example, three at regular intervals in the circumferential direction) on which hooks 412a of the crane portion 40 are locked. A bowl-shaped container-side electrode 112 is disposed on the uppermost portion of the upper container 11.

  The lower container 12 has a lower flange 121 formed at the upper end portion so as to project outward in the radial direction. The lower flange 121 has a plurality of bolt holes 121a (see FIG. 4B, for example, 20 at regular intervals) into which the bolts 13 are screwed. Further, the lower flange 121 includes a positioning pin 121b that is inserted into the guide rod 16 (see FIG. 6) when positioning the upper container 11 and the lower container 12. The positioning pin 121b is provided at a position corresponding to the positioning hole 111b of the upper container 11. The inner diameter of the positioning hole 111b is larger than the outer diameter of the positioning pin 121b. If the difference in diameter between the inner diameter of the positioning hole 111b and the outer diameter of the positioning pin 121b is too large, it is difficult to align the position during the process of lowering onto the upper flange 111 and the lower flange 121, resulting in poor workability. Therefore, the inner diameter of the positioning hole 111b may be slightly larger than the outer diameter of the positioning pin 121b.

The lower container 12 has a gas inlet (not shown). When performing an electrical test, an insulating gas (for example, N ₂ gas, dry air) is supplied from a gas supply unit (not shown) through the gas inlet. Is introduced. A sample to be subjected to the electrical test is disposed inside the lower container 12 and is electrically connected to the container side electrode 112 and a measuring device (not shown).

  As shown in FIG. 1, the voltage application unit 20 includes a test transformer 21 and a transformer-side electrode 22 that can adjust the applied voltage. A lead wire 23 is drawn out from the test transformer 21 and connected to the bowl-shaped transformer-side electrode 22. The transformer side electrode 22 is installed at substantially the same height as the container side electrode 112. The voltage application unit 20 applies a voltage to the sample via the interelectrode connection unit 30.

  FIG. 3 is a diagram showing a detailed configuration of the interelectrode connecting portion 30. FIG. 3A is a cross-sectional view along the longitudinal direction of the lead portion 31, and FIG. As shown in FIG. 3, the interelectrode connection part 30 includes a lead part 31, a lead support part 32, an elevating drive part 33, a rotating base 34, and the like.

The lead part 31 includes a lead pipe 311 and a lead wire 312. The lead pipe 311 is a substantially straight pipe member made of, for example, metal (here, made of aluminum), and both end portions hang down gently. By arranging the lead pipe 311 around the lead wire 312, the influence of the corona in the air can be reduced. In the commercial frequency partial discharge test, since it is necessary to detect a small amount of charge due to partial discharge, it is extremely important to remove the corona in the air.
The lead wire 312 is, for example, a metal braided wire, and is inserted into the lead pipe 311 so that both ends are exposed to the outside. A container-side terminal fitting 313 is attached to one end of the lead wire 312 and a transformer-side terminal fitting 314 is attached to the other end. When the transformer-side terminal fitting 314 contacts the transformer-side electrode 22 and the container-side terminal fitting 313 contacts the container-side electrode, the voltage application unit 20 and the sample are electrically connected.

  The lead support portion 32 includes a lead holding member 321, a connecting member 322, and an exterior pipe 323. The lead support portion 32 is disposed below the lead portion 31 and supports the lead portion 31.

  The lead holding member 321 is an insulating member made of polyacetal or MC nylon (registered trademark), and has a concave portion (not shown) in which the lead portion 31 is fitted on the upper surface. The lead part 31 is held substantially horizontally by the lead holding member 321. The lead holding member 321 has a protruding portion 321a that protrudes downward. The protruding portion 321 a has an outer diameter that is substantially the same as the inner diameter of the exterior pipe 323, and is inserted into the upper portion of the exterior pipe 323. The lead holding member 321 is fixed by a fixing pin 326 so as not to fall off the outer pipe 323 and to rotate integrally with the outer pipe 323.

  The connecting member 322 is an insulating member made of polyacetal or MC nylon (registered trademark), and has a small diameter portion 322a and a large diameter portion 322b. The small diameter portion 322a has an outer diameter substantially the same as the inner diameter of the exterior pipe 323, and is inserted from the lower portion of the exterior pipe 323. The large diameter portion 322b has an outer diameter larger than the inner diameter of the exterior pipe 323. When lifting the lead portion 31, the stepped portion at the boundary between the small diameter portion 322 a and the large diameter portion 322 b abuts on the lower end of the exterior pipe 323. The raising / lowering drive part 33 is connected to the large diameter part 322b. The connecting member 322 is fixed by a fixing pin 327 so as to rotate integrally with the exterior pipe 323.

  The exterior pipe 323 is an acrylic pipe member, for example. The exterior pipe 323 has fixing holes 323a and 323b on the peripheral surface. A fixing pin 326 is inserted into the lead holding member 321 through the fixing hole 323a. In addition, fixing pins 327 (two in this case) are inserted into the connecting member 322 through the fixing holes 323b. The fixing pins 326 and 327 are, for example, vinyl chloride bolts. The fixing hole 323b has an oval shape extending in the vertical direction, and the connecting member 322 to which the fixing pin 327 is attached can move in the exterior pipe 323.

  The elevating drive unit 33 is disposed below the lead support unit 32 and elevates the lead support unit 32. The elevating drive unit 33 has an elevating shaft extending in the vertical direction. As the raising / lowering drive part 33, an air cylinder and a hydraulic cylinder are suitable, for example. The elevating drive unit 33 includes a cylinder body 331 and a piston rod 332 serving as an elevating shaft. The piston rod 332 is connected to the large diameter portion 322b of the connecting member 322. As the piston rod 332 reciprocates in the vertical direction, the connecting member 322 moves up and down, and further, the exterior pipe 323, the lead holding member 321 and the lead portion 31 move up and down. The elevating drive unit 33 may be driven by a drive motor and may have an elevating shaft that can move in the vertical direction, but does not use oil (environmental) and is an air cylinder that is easy to operate. Is more preferable.

  The elevating drive unit 33 is fixed to the rotary base 34. When the rotary base 34 rotates, the elevating drive unit 33 and the connecting member 322 rotate. Since the rotational movement of the connecting member 322 is restricted by the fixing pin 327 and the fixing hole 323b, the exterior pipe 323, the lead holding member 321 and the lead portion 31 also rotate integrally. That is, the interelectrode connecting portion 30 is rotatable about the lifting shaft of the lifting drive unit 33.

As described above, the lead support portion 32 is inserted with the lead holding member 321 for holding the lead portion 31 horizontally, the connecting member 322 connected to the elevating drive portion 33, and the lead holding member 321 from above, and from below. And an exterior pipe 323 into which the connecting member 322 is inserted.
The connecting member 322 has a small-diameter portion 322 a inserted into the exterior pipe 323 and a large-diameter portion 322 b that cannot be inserted into the exterior pipe 323, and the small-diameter portion 322 a and the large-diameter portion accompanying the ascending operation by the elevating drive unit 33. The stepped portion at the boundary of 322b contacts the lower end of the exterior pipe 323 to push up the exterior pipe 323, and the stepped portion is separated from the lower end of the exterior pipe 323 along with the lowering operation by the elevating drive unit 33.

  Accordingly, one end of the lead 31 comes into contact with the container-side electrode 112 due to its own weight and the other end of the lead 31 comes into contact with the transformer-side electrode 22 along with the lowering operation of the lead support 32 by the lift drive unit 33. And the structure which cancels the downward operation | movement of the lead part 31 after that can be implement | achieved by a very simple structure.

  FIG. 4 is a diagram illustrating a detailed configuration of the crane unit 40. 4A is a front view, and FIG. 4B is a plan view seen from above. FIG. 4 shows a state in which the upper container 11 is lifted and moved. As shown in FIG. 4, the crane unit 40 includes a hoist unit 41, a gantry 42, and a crane drive unit 43. The crane unit 40 lifts the upper container 11 and moves it in the horizontal direction.

  The hoist part 41 has a bridge part 411 for fixing to the gantry 42, a wire 412, and a winding part 413 for winding up the wire. Here, three wires are wound around the winding part 413.

  The gantry 42 has casters 421 and is movable in the horizontal direction. The gantry 42 is open at one end in the moving direction, and can move until the hoist part 41 is located above the test container 10.

  The crane drive unit 43 is connected to the gantry 42 and moves the gantry 42 in the horizontal direction. The crane drive unit 43 has a moving shaft extending in the horizontal direction. As the crane drive unit 43, for example, an air cylinder or a hydraulic cylinder is suitable. The crane drive unit 43 may be driven by a drive motor and may have a moving shaft that can move in the horizontal direction. However, an air cylinder that does not use oil (environmental) and is easy to operate is more suitable. preferable.

  The crane drive unit 43 includes a cylinder body 431 and a piston rod 432 serving as a moving shaft. A piston rod 432 is connected to the lower part of the gantry 42. As the piston rod 432 reciprocates in the horizontal direction, the gantry 42 moves in a certain direction, and the lifted upper container 11 moves.

  The piston rod 432 and the gantry 42 are preferably detachably connected using, for example, a magnet. For example, by applying an ON / OFF switching type magnet holder between the tip of the piston rod 432 on the gantry 42 side and the gantry 42, the piston rod 432 and the gantry 42 can be attached and detached more easily. Thereby, the drive part 43 for cranes can be isolate | separated and the hoist part 41 and the mount frame 42 can be moved freely.

FIG. 5 is a diagram showing the connection / separation of the transformer-side electrode 22 and the container-side electrode 112 by the interelectrode connection part 30.
As shown in FIG. 5A, in the state where the piston rod 332 is raised most, the lead portion 31 is lifted, and the container side terminal fitting 313 and the container side electrode 112, and the transformer side terminal fitting 314 and the transformer side electrode 22 are separated from each other. Electrically disconnected. By rotating the interelectrode connecting portion 30 in this state, it is possible to avoid interference between the crane portion 40 and the interelectrode connecting portion 30 during sample installation.

  As shown in FIG. 5B, when the piston rod 332 is lowered from the state shown in FIG. 5A, the lead portion 31 is also gradually lowered, and the container side terminal fitting 313 and the container side electrode 112, and the transformer side terminal fitting 314 and the transformer side electrode. 22 come into contact with each other. At this time, the container side terminal fitting 313 and the container side electrode 112, and the transformer side terminal fitting 314 and the transformer side electrode 22 are electrically connected.

  As shown in FIG. 5C, when the piston rod 332 is further lowered from the state shown in FIG. 5B, the lead portion 31 is supported by the container side electrode 112 and the transformer side electrode 22. The subsequent lowering operation of the lead part 31, the lead holding member 321 and the exterior pipe 323 is released, and only the connecting member 322 is lowered. The container-side terminal fitting 313 and the container-side electrode 112, and the transformer-side terminal fitting 314 and the transformer-side electrode 22 are reliably in contact with each other by the weight of the lead portion 31, and are electrically connected.

As described above, the electrical test apparatus 1 is housed in the test container 10 (pressure container) having the lower container 12 that houses the sample and the upper container 11 that closes the opening of the lower container 12, and the test container 10. A voltage application unit 20 that applies a voltage to the sample, and an inter-electrode connection unit 30 that connects the container-side electrode 112 of the test container 10 and the transformer-side electrode 22 of the voltage application unit 20 are provided.
The inter-electrode connecting portion 30 is disposed below the lead portion 31 made of metal, the lead portion 31 hanging from both ends, the lead supporting portion 32 supporting the lead portion 31, and the lower portion of the lead supporting portion 32. And a drive unit 33 for raising and lowering the lead support part 32. Along with the lowering operation of the lead support portion 32 by the elevating drive unit 33, the container side terminal fitting 313 (one end portion) of the lead portion 31 comes into contact with the container side electrode 112 by its own weight and the transformer side terminal fitting 314 ( The other end part) contacts the transformer side electrode 22, and the subsequent lowering operation of the lead part 31 is released.

According to the electrical test apparatus 1, by using a pressure vessel as the test vessel 10, an electrical test can be performed without using SF ₆ gas. In addition, since the container side electrode 112 and the transformer side electrode 22 are connected via the interelectrode connecting portion 30 that is movable in the vertical direction, the connection work and the separation work can be easily and safely performed. Workability at the time of sample setting is remarkably improved. Specifically, it can be prevented that the lead part 31 is lowered too much and an excessive force is applied vertically downward to the test container 10 or the voltage application part 20 to cause an accident of equipment overturning.

When performing an electrical test using the electrical test apparatus 1, first, the crane unit 40 is moved so that the hoist unit 41 is positioned above the test container 10. The hook 412a of the crane part 40 is hooked on the engaging part 113 of the upper container 11, and the upper container 11 is lifted. And the crane part 40 is moved horizontally and the lower container 12 is open | released (1st process).
Since the crane unit 40 can be moved only in a certain direction by the crane drive unit 43, the crane unit 40 can be easily moved to a desired position.

  Next, a sample is installed inside the lower container 12 (second step). The sample is connected to a portion connected to the container-side electrode 112 of the test container 10 and a measurement device (not shown).

  Next, the crane unit 40 is moved so that the upper container 11 is positioned above the lower container 12, and the upper container 11 is lowered onto the lower container 12 (third step). When the crane unit 40 is moved manually, the caster 421 swings, so that it is difficult to horizontally move the upper container 11 completely to the original position (position corresponding to the lower container 12). In the present embodiment, the crane unit 40 can be moved only in a certain direction by the crane drive unit 43, so that the upper container 11 can be easily moved horizontally to the original position.

  At this time, as shown in FIGS. 6A and 6B, the guide rod 16 is inserted into the positioning holes 111 b (two places) of the upper flange 111. The inner diameter of the positioning hole 111 b is larger than the outer diameter of the guide rod 16. Further, a guide hole 16a for fitting with a tip end portion of the positioning pin 121b is provided at an end portion (lower side in FIG. 6) of the guide rod 16. The guide hole 16 a at the end of the guide rod 16 is inserted into the positioning pin 121 b fixed to the lower flange 121. Here, since the outer diameter of the guide rod 16 is smaller than the outer diameter of the positioning pin 121b, the guide hole 16a of the guide rod 16 is fitted into the tapered portion at the tip of the positioning pin 121b.

  Thereby, the position of the bolt hole 111a of the upper container 11 and the position of the bolt 13 (here, the stud bolt 13 is fixed to the lower flange 121 in advance by a nut (not shown)) are fixed to the lower container 12. Can be easily matched. If the bolt 13 of the lower container 12 can be inserted into the bolt hole 111a of the upper container 11, the guide bar 16 may be removed from the positioning pin 121b.

The method of gripping the upper container 11 and finely adjusting the position involves a risk that the operator's hand enters between the upper container 11 and the lower container 12, and takes time for the position adjustment work. On the other hand, according to the above method, the position adjustment work can be easily performed, and the safety of the work can be improved. When the position adjustment operation is completed and the upper container 11 is lowered onto the lower container 12, that is, by bringing the lower surface of the upper flange 111 into contact with the upper surface of the lower flange 112, the upper container 11 is returned to the original position. Can be returned.
In FIG. 6, the guide rod 16 is described as having a guide hole 16a provided at the tip of the metal rod, but the entire guide rod 16 may be pipe-shaped (in this case, the guide hole 16a is provided over the entire length of the guide rod 16). That is, it is only necessary that the guide hole 16 a for inserting the tip of the positioning pin 121 b is provided in at least one end of the guide bar 16.

  Next, the nut 14 is fastened to the bolt 13 fixed to the lower flange 121 of the lower container 12 to seal the test container 10 (fourth step).

Next, N ₂ gas is sealed until the inside of the test container 10 reaches a predetermined pressure (for example, 0.3 MPa) (fifth step). And a voltage is applied to a sample by the voltage application part 20, and an electrical property (A commercial frequency partial discharge voltage here as an example) is measured (6th process). Since the desired dielectric strength can be obtained by setting the inside of the test container 10 to a high pressure, the electrical test can be stably performed without generating air discharge or surface flashing.

  As described above, the electrical test apparatus 1 is housed in the test container 10 (pressure container) having the lower container 12 that houses the sample and the upper container 11 that closes the opening of the lower container 12, and the test container 10. The voltage application part 20 which applies a voltage to a sample, and the crane part 40 which lifts the upper side container 11 and moves to a horizontal direction are provided. The crane unit 40 includes a gantry 42 that can move horizontally, and a crane drive unit 43 that is connected to the gantry 42 and moves the gantry 42 in a certain direction.

  In addition, the electrical test method using the electrical test apparatus 1 includes a first step of lifting the upper container 11 by the crane unit 40 and moving it horizontally, a second step of installing a sample inside the lower container 12, and A third step of moving the upper container 11 in the horizontal direction by the crane unit 40 and returning it to the original position. In the first step and the third step, a crane drive unit 43 having a moving axis in a certain direction is used. The crane unit 40 is moved.

According to the electrical test apparatus 1 and the electrical test method using the electrical test apparatus, an electrical test can be performed without using SF ₆ gas by using a pressure container as the test container 10. Moreover, since the crane part 40 is moved using the crane drive part 43, such as an air cylinder, the movement work (including the position adjustment work) of the upper container 11 can be performed easily and safely.

As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the above embodiment, and can be changed without departing from the gist thereof.
For example, the configuration of the lead support portion 32 may be a configuration in which the connecting member 322 contacts the lead holding member 321 and pushes up the lead holding member 321 and the lead portion 31. In this case, a configuration in which the lead holding member 321 is not dropped from the exterior pipe 323 is preferable.
For example, a plurality of crane drive units 43 may be provided. Furthermore, the piston rod 432 (moving shaft) of the crane drive unit 43 may be connected to a portion other than the lower portion of the gantry 42.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Electrical test equipment 10 Test vessel (pressure vessel)
DESCRIPTION OF SYMBOLS 11 Upper container 112 Container side electrode 12 Lower container 13 Bolt 14 Nut 15 Base 16 Guide rod 20 Voltage application part 21 Test transformer 22 Transformer electrode 23 Lead wire 30 Interelectrode connection part 31 Lead part 311 Lead pipe 312 Lead wire 32 Lead support part 321 Lead holding member 322 Connecting member 323 Exterior pipe 33 Lifting drive part (air cylinder)
331 Cylinder body 332 Piston rod (elevating shaft)
34 Rotating base 40 Crane part 41 Hoist part 42 Mounting base 43 Crane drive part (air cylinder)
431 Cylinder body 432 Piston rod (moving axis)

Claims (4)

A pressure vessel having a lower container for containing the sample and an upper container for closing the opening of the lower container;
A voltage application unit for applying a voltage to the sample accommodated in the pressure vessel;
A crane part that lifts the upper container and moves in a horizontal direction, and an electrical test apparatus comprising:
The crane part is
A horizontally movable base;
An electrical test apparatus comprising: a crane drive unit that is detachably connected to the gantry using a magnet and moves the gantry in a certain direction.   The electrical testing apparatus according to claim 1, wherein the crane driving unit includes a moving shaft that is movable in a horizontal direction. A pressure vessel having a lower container for containing the sample and an upper container for closing the opening of the lower container;
A voltage application unit for applying a voltage to the sample accommodated in the pressure vessel;
A gantry that is movable in a horizontal direction; a crane drive unit that is connected to the gantry and moves the gantry in a certain direction; and a crane unit that lifts the upper container and moves in a horizontal direction;
An electrical test method using an electrical test apparatus comprising:
A first step of connecting the gantry and the crane drive using a magnet;
A second step of lifting the upper container by the crane and moving it horizontally.
A third step of placing a sample inside the lower container;
A fourth step of moving the upper container horizontally by the crane part and returning it to the original position,
Wherein in the second step and the fourth step, the electrical test method characterized by moving the platform with the crane driver. In the fourth step, by inserting a guide rod into the positioning hole of the upper container, and inserting a guide hole provided in at least one end of the guide rod into the tip of the positioning pin of the lower container The electrical test method according to claim 3 , wherein the upper container and the lower container are aligned.

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