JP2020171157A - Short circuit device of filter capacitor, short circuit/unit device, and short circuit method - Google Patents

Abstract

To provide a short circuit device for a filter capacitor, where one member can be used depending on situations and which enables a high-voltage inverter device to operate normally before and after replacement of a unit with a built-in filter capacitor and to avoid a risk of electric shock to an operator at the time of replacement.SOLUTION: A short circuit device 104 is configured so as to, when the capacity of the capacitor built into the device increases by incorporating the unit with built-in filter capacitor 101 into the high-voltage inverter device, insulate the terminals (between P and N terminals) of the filter capacitor 101 that cannot be removed due to the specifications and at the same time to short-circuit the P terminal and the N terminal. Also, the short circuit device 104 is configured so as to, during storing the filter capacitor for expansion, which is built-in a unit that is designed to be removable, short-circuit the P terminal and the N terminal with a conductor.SELECTED DRAWING: Figure 2

Description

The present invention relates to a short-circuit device for a filter capacitor, a short-circuit / unit device, and a short-circuit method.
For example, in a high-voltage inverter device, the capacitor terminals (P terminal of the positive electrode and N terminal of the negative electrode) of the filter capacitor that cannot be removed from the main body of the device during voltage application are connected to the main circuit wiring (P, N) of the high-voltage inverter device. The present invention relates to a short-circuit device, a short-circuit / unit device, and a short-circuit method suitable for safely storing a filter capacitor built in a unit that is insulated from) and can be removed from the high-voltage inverter device according to the specifications.

In a high-voltage inverter device that converts DC power to AC power, a filter capacitor is mounted on the DC circuit side as a smoothing circuit. In addition, some high-voltage inverter devices are configured so that the filter capacitor can be taken out and replaced for reasons such as maintenance.
The problem in such a case is electric shock due to the high voltage charged in the filter capacitor.
That is, when the high voltage inverter device is energized, the filter capacitor is pressurized, and a high voltage is generated between the P terminal of the positive electrode and the N terminal of the negative electrode of the filter capacitor. Then, in this high voltage, the electric charge remains in the filter capacitor even after the energization is stopped. As a result, there is a risk that the operator will get an electric charge during maintenance because the residual charge remains as a high voltage between the P and N terminals.
Therefore, in order to ensure safety, a method of spontaneously discharging the residual charge of the capacitor by the internal resistance component of the capacitor or the discharge resistance connected in parallel before the maintenance work, or between the PN terminals at the beginning of the maintenance work. Is forcibly discharged using a mechanism that short-circuits with a conductor connected to a discharge resistor. For example, as a method of forced discharge, there is a technique described in Japanese Patent Application Laid-Open No. 2012-090720 (Patent Document 1).
In this publication, "a discharge mechanism that discharges the residual charge of a high-pressure inverter device, and a pair of discharge terminals connected to the positive and negative sides of a capacitor provided in the inverter circuit of the high-pressure inverter device, and a discharge resistor. The discharge mechanism of the high-pressure inverter device is provided with a short-circuiting means for discharging the residual charge of the capacitor by short-circuiting the pair of discharge terminals in a state of being electrically connected to the capacitor. "

Special Table 2012-090720

When maintaining the high-voltage inverter device, for example, replace the unit without a built-in filter capacitor (see unit 108 without a built-in filter capacitor in FIG. 9) with a unit with a built-in filter capacitor (see unit 106 with a built-in filter capacitor in FIG. 8). May be done.
In such a case, a method of removing the filter capacitor which becomes the surplus capacitance can be mentioned. However, in order to allow the filter capacitor to be returned to the existing system, or for structural reasons, the filter capacitor of the high-voltage inverter device may not be removable due to the specifications.
Therefore, it is necessary to keep the filter capacitor having a surplus capacity installed in the device and electrically insulate the filter capacitor from the main circuit (main circuit wirings P and N) of the high-voltage inverter device. In addition, the insulated filter capacitor, like the capacitor stored as a replacement part, has an increased risk of electric shock due to natural charging. Therefore, it is necessary to short-circuit between the PN terminals.
However, Patent Document 1 does not assume the problem in the above case.
Therefore, in Patent Document 1, when the residual charge of the high-pressure inverter device is discharged, the pair of discharge terminals connected to the positive electrode side and the negative electrode side of the capacitor of the cell inverter are short-circuited in a state of being conductive with the discharge resistance, and the high-pressure inverter device is used. The effect is limited to the ability to discharge the residual charge of the capacitor.

Therefore, in the present invention, a technique that can be used properly according to the situation of the high-voltage inverter device, for example, one short-circuit device can be used as a device having a short-circuit function and a device having both insulation and short-circuit functions depending on the situation. The purpose of the present invention is to provide a technology that enables the high-voltage inverter device to operate normally before and after the replacement of the unit with a built-in filter capacitor and to avoid the risk of electric shock to the operator at the time of replacement.

In order to solve the above problems, one of the typical short-circuiting devices, short-circuiting / unit devices, and short-circuiting methods of the present invention is a short-circuiting device that short-circuits between the P / N terminals of the filter capacitor, and the P / N of the filter capacitor. A terminal short-circuit holding portion that is attached to a terminal and short-circuits between the P and N terminals to hold the P and N terminals, and a main circuit wiring P and / or a main circuit N wiring connected to the P and N terminals. Has a wiring insulation holding portion that insulates the main circuit P wiring and / or holds the main circuit N wiring.

The schematic diagram of the high voltage inverter device which concerns on this Example. The external perspective view which shows the attachment state of the main circuit wiring, the filter capacitor and the short circuit device which comprises the main circuit of the high voltage inverter device which concerns on this Example. The figure explaining the connection relation between the short circuit apparatus, the filter capacitor, and the main circuit wiring which concerns on this Example. The external perspective view which shows the short-circuiting apparatus which concerns on this Example. The schematic diagram which shows the relationship with the short-circuiting device in the state which has built-in the filter capacitor and is removable from the device main body by the specification which concerns on this Example. The figure which shows the filter circuit in the state which the filter capacitor which cannot be removed by the specification cannot be short-circuited and is energized. A filter capacitor circuit diagram showing a state in which a filter capacitor that cannot be removed due to specifications is insulated and short-circuited. The figure which shows the filter circuit when the unit which built-in the filter capacitor which cannot be removed by the specification is used. The figure which shows the filter circuit using the unit which does not have a built-in filter capacitor.

Hereinafter, this embodiment will be described with reference to the drawings.

First, the short-circuiting device of this embodiment will be described on the premise that it is applied to a high-voltage inverter device for railway vehicles.
In this case, the products mounted on the railroad vehicle including the high-voltage inverter device are always exposed to vibration. For this reason, high vibration resistance is required. In addition, in-vehicle electronic components such as capacitors need to be arranged in an extremely dwarf space, and there is a limitation that there is little spatial freedom in the surroundings. In addition, since mass reduction is always required, a structure that is as lightweight as possible is preferred.

For example, among the high-voltage inverter components for railway vehicles, for power units that incorporate power semiconductor elements, which are core components, the power semiconductor elements have recently been changed from silicon (Si) IGBTs to silicon carbide (SiC) MOSFETs. , There is a configuration that allows switching operation at higher speed.
When a silicon carbide (SiC) MOSFET is used as a power semiconductor, it is necessary to minimize the inductance between the semiconductor element and the filter capacitor to suppress noise during inverter operation and stabilize it.
For this purpose, it is desirable that the filter capacitor is built in the power unit. Therefore, when a power unit with a built-in capacitor (see unit 106 with a built-in filter capacitor in FIG. 8) is attached to the same high-voltage inverter device, and a power unit without a built-in capacitor (unit 108 without a built-in filter capacitor in FIG. 9). Two types of cases are assumed when mounting (see).
Here, for example, when the unit without a built-in filter capacitor is replaced with the unit with a built-in filter capacitor, there is a problem that the combined capacity of the high-voltage inverter device as a whole increases. Therefore, when using a power unit having a built-in filter capacitor, it is necessary to insulate the filter capacitor built into the high-voltage inverter device.

That is, it is sufficient that the capacitor inside the high-voltage inverter device can be short-circuited only when the power unit with a built-in filter capacitor is mounted on the device body. As a means for this, for example, as shown in Patent Document 1 described above, a discharge mechanism having a structure capable of switching the main circuit insulation / capacitor short circuit / capacitor energization state is prepared in advance at the filter capacitor terminal portion inside the high-voltage inverter device. However, it is conceivable to short-circuit the capacitor.

That is, in order to switch the main circuit insulation / capacitor short circuit / capacitor energized state, a short circuit conductor that contacts the PN terminal of the capacitor terminal is rotated around a rotation shaft with a built-in discharge resistor to short-circuit. This is a method of short-circuiting a capacitor by a discharge mechanism having a structure in which a conductor can short-circuit between the terminals of the P and N terminals of the capacitor via a discharge resistor.
However, it is practically difficult to add a discharge mechanism as described in Cited Document 1 to a high-voltage inverter device that has already been delivered to the customer and is in operation at the customer.

Further, in railway vehicles, as described above, there are demands for vibration resistance, space restrictions, and mass reduction. Therefore, when the high-voltage inverter device is stopped, the permanent discharge resistance existing inside the high-voltage inverter device is used in advance. Then, after stopping, a system that waits for a specified time without touching the device and spontaneously discharges the capacitor is common. For this reason, it is not necessary to bother to put a discharge resistor in the circuit that short-circuits the P terminal and the N terminal.
Therefore, the member (short-circuit member) that short-circuits the P and N terminals of the capacitor is a general conductor member, and the above-mentioned insulator (insulating member) that allows the P or N wiring of the main circuit conductor to simply land is used. Any device having an insulating / short-circuit function formed in a structure added to the conductor member of the above can sufficiently fulfill the required function. That is, any device having an insulation / short-circuit function having a simple structure as compared with the discharge mechanism described in Patent Document 1 is sufficient.

Further, the structure of the device having the insulation / short-circuit function may be configured so that it can be easily inserted into the terminal portion of the filter capacitor. As a result, a device having an insulation / short-circuit function can be easily and easily additionally attached to an existing high-voltage inverter device.
That is, by attaching / removing the device having this insulation / short-circuit function between the filter capacitor and the main circuit wiring, the capacitor can be easily switched from the main circuit to the main circuit insulation / capacitor short-circuit / capacitor energization.

On the other hand, as a replacement part, when the filter capacitor is stored alone without being attached to the high-voltage inverter device, if the circuit between the P terminal and N terminal (capacitor terminal) is left open, it will be charged naturally and inside. Charges accumulate, and eventually a high voltage is generated between the PN terminals. Therefore, there is a risk that the operator may get an electric shock during maintenance. Therefore, in order to ensure safety, a method of short-circuiting the P terminal and the N terminal with a conductor such as a wire has been conventionally adopted.
In the high-voltage inverter device, by replacing the removable unit according to the specifications, it is possible to improve the performance while diverting the existing system. For example, in a power unit containing a power semiconductor element that is a core component, switching can be performed at higher speed by replacing the power semiconductor element with a unit that uses a silicon (Si) IGBT as a silicon carbide (SiC) MOSFET. .. At this time, in order to minimize the inductance between the semiconductor element and the filter capacitor, suppress noise during inverter operation, and achieve stabilization, it is desirable to incorporate the filter capacitor in the power unit.
In this way, even if there is a filter capacitor built into the removable unit due to the specifications, it is also necessary to short-circuit between the P terminal and the N terminal with a conductor such as a wire during storage.
On the other hand, if the unit without a built-in filter capacitor is replaced with a unit with a built-in filter capacitor, there is a problem that the combined capacity of the filter capacitor built in the high-voltage inverter device increases. As a solution, there is a method of removing the filter capacitor which becomes the surplus capacitance. However, it may not be removable due to specifications, either because it can be returned to the existing system or because the filter capacitor cannot be easily removed structurally.
In this case, it is necessary to leave the filter capacitor, which has a surplus capacity, installed in the device and electrically insulate it from the main circuit. Further, the insulated filter capacitor, like the capacitor stored as a replacement part, has an increased risk of electric shock due to natural charging, so it is necessary to short-circuit between the P terminal and the N terminal.

In short, in view of the above points, when the capacity of the capacitor built in the high-voltage inverter device is increased by incorporating the unit with a built-in filter capacitor into the high-voltage inverter device, in this embodiment, the P of the filter capacitor that cannot be removed due to the specifications. At the same time as insulating the terminals and the N terminal, it is possible to simply realize a structure in which the P terminal and the N terminal of the filter capacitor are short-circuited.
Specifically, as shown in FIG. 9, it is composed of a unit 108 without a built-in filter capacitor without a built-in filter capacitor and a unit 107 with a built-in filter capacitor having a built-in filter capacitor (Fc) that cannot be removed due to specifications. When the unit 108 without a built-in filter capacitor of FIG. 9 is replaced with the unit 106 with a built-in filter capacitor (Fc) of FIG. 8 for the circuit, the combined capacitance of the entire circuit increases to the extent that it exceeds the specified value. To do. Therefore, insulation of any capacitor on the circuit is required. In such a case, the filter capacitor is safely insulated.

Further, a high voltage is applied to the main circuit of the high voltage inverter. Therefore, in order to insulate the filter capacitor, it is necessary to keep the P terminal and N terminal of the main circuit and the filter capacitor (Fc) away by taking measures such as maintaining an appropriate insulation distance or sandwiching an insulator between them. There is. Further, it is necessary to short-circuit the P terminal and the N terminal of the insulated filter capacitor (Fc) with a short-circuit member (conductor) so that they have the same potential. FIG. 7 shows this in a circuit diagram.

FIG. 7 is a diagram showing a state in which the P terminal side of the filter capacitor (Fc) is insulated (x mark) and the P terminal and N terminal sides of the filter capacitor (Fc) are short-circuited (both terminals are connected).
It can be seen that when the filter capacitor (Fc) is not insulated, a circuit as shown in FIG. 6 should be provided in advance so that a circuit that short-circuits the P terminal and the N terminal is not connected.
FIG. 6 is a diagram showing a state in which a filter capacitor (105 / Fc in FIG. 8), which cannot be removed due to specifications, is energized.

Further, in this embodiment, the P terminal and the N terminal are short-circuited by a short-circuit member (conductor) when the expansion filter capacitor built in the removable unit is stored.

Hereinafter, the details of this embodiment will be described with reference to FIGS. 1 to 9.
First, consider the case where the filter capacitor 101 is insulated from the main circuit (not shown) of the high-voltage inverter device.
FIG. 1 is a schematic view of a high-voltage inverter device according to this embodiment.
The device main body 100 of the high-voltage inverter device includes a filter capacitor 101 that cannot be removed from the device main body 100 due to specifications and a filter capacitor 103 that can be taken out from the device main body 100 due to specifications.

First, the main circuit P terminal 1031 and the N wiring 1032 connected to the P terminal and the N terminal of the filter capacitor 101 are temporarily removed.

Next, the short-circuit device 104 is attached to the capacitor terminal portion of the filter capacitor 101 from which the main circuits P wiring 1031 and N wiring 1032 have been removed, that is, the P terminal 1011 and the N terminal 1012.
Then, the short-circuit member (conductor) 1041 of the short-circuit device 104 short-circuits the P terminal 1011 and the N terminal 1012 of the filter capacitor 101. The configuration of the short-circuit device 104 will be described later.
At this time, as a premise, the main circuit P wiring 1031 and the main circuit N wiring 1032 need to be composed of a member such as a flexible electric wire.

Next, one of the main circuit P wiring 1031 and the main circuit N wiring 1032 removed from the filter capacitor 101, for example, the insulating member (碍 子) 1042 provided on the short circuit member (conductor) 1041 with the main circuit P wiring 1031. Attach to. The attachment to the insulating member (insulator) 1042 is performed, for example, via the terminal (conductor bar) 10511.
As a result, the main circuit P wiring 1031 and the P terminal 1011 of the filter capacitor 101 can be insulated.
Further, the other main circuit N wiring 1032 is connected to the terminal (conductor bar) 10512 connected to the N terminal 1021 of the filter capacitor 101.
In this embodiment, it is assumed that the main circuit P wiring 1031 is insulated, but the main circuit N wiring 1032 may be insulated.

As described above, the main circuit and the filter capacitor 101 can be insulated, and the P terminal 1011 and the N terminal 1012 of the filter capacitor 101 can be short-circuited (see FIGS. 2 and 3). Hereinafter, the details will be described with reference to FIGS. 2 and 3.

FIG. 2 shows the attachment of the main circuit P wiring 1031, the main circuit N wiring 1032, the P terminal 1011 of the filter capacitor 101, the N terminal 1012, the short circuit member 1041 of the short circuit device 104, and the insulating member 1042 that form the main circuit of the high voltage inverter device. FIG. 3 is an external perspective view showing a state, and is a diagram for explaining the connection relationship between the short-circuit device 104, the filter capacitor 101, the main circuit P wiring 1031 and the main circuit N wiring 1032.

In the figure, the main circuit P wiring 1031 is fixed to the insulating member (insulator) 1042 of the short-circuit device 104 via the terminal 10511 by a fixture 1052 such as a bolt or a nut.

The main circuit N wiring 1032 is fixed to the short-circuit member (conductor) 1041 of the short-circuit device 104 via the terminal 10512 by a fixture 1052 such as a bolt or a nut.

The short-circuit member (conductor) 1041 of the short-circuit device 104 is fixed by a fixture 1052 such as a bolt or nut so as to come into contact with the P terminal 1011 and the N terminal 1012 of the filter capacitor 101 inserted in the terminal insertion hole 1043.

The short-circuit member (conductor) 1041 constitutes a terminal short-circuit holding portion for holding the terminal portion of the main circuit P wiring 1032, and the insulating member (碍 子) 1042 constitutes a wiring insulation holding member for holding the main circuit P wiring 1031. ..

FIG. 4 is an external perspective view showing an example of the short-circuit device 104 according to the present embodiment.
The short-circuit device 104 has one short-circuit member 1041 and a plurality of insulating members 1042.

The short-circuit member 1041 short-circuits the P terminal 1011 and the N terminal 1012 of the filter capacitor 101, and is made of a plate-shaped conductor (conductive material). The short-circuit member 1041 includes a plurality of terminal insertion holes 1043 formed for inserting the P terminal 1011 and the N terminal 1012 of the filter capacitor 101.

The insulating member 1042 insulates the main circuit wiring 1011 and 1012 from the capacitor terminal portion of the filter capacitor 101, and is composed of, for example, a pair of porcelains formed at one end of the short-circuit member 1041.

Next, let us consider a short circuit of the PN terminal of the expansion filter capacitor 103 in the unit 102 (power unit) that is removable due to the specifications of the built-in filter capacitor 103.
At this time, it is necessary to short-circuit the PN terminals of the built-in filter capacitor 103 in the state where the removable unit 102 is removed from the high-voltage inverter device.
Therefore, it is necessary to short-circuit the PN terminals of the filter capacitor 103 inside the unit by the short-circuit device 104 (short-circuit member) in the same manner as when the filter capacitor 101 inside the high-voltage inverter device is short-circuited. Also, for the capacitor inside the high-voltage inverter device, the short-circuit circuit does not need to go through a discharge resistor or the like.
From this, there is no problem as long as the conductor has a shape that can short-circuit the P terminal and the N terminal of the capacitor terminal portion.

Hereinafter, the details will be described with reference to FIGS. 1 to 4.
In FIG. 1, the apparatus main body 100 is provided with a filter capacitor 101 that cannot be removed due to specifications, and an additional filter capacitor 103 that is built in a unit 102 that is removable due to specifications.

The unit 102 that can be removed according to the specifications has a unit P terminal 1021 and a unit N terminal 1022 made of a conductor attached to the P terminal and the N terminal of the filter capacitor 103 for expansion in a conductive state. As shown in the figure, the unit P terminal 1021 and the unit N terminal 1022 have a structure exposed from the removable unit 102.

First, consider removing the removable unit 102 from the device main body 100 together with the built-in additional filter capacitor 103 for maintenance or long-term storage.
At this time, the short-circuit device 104 shown in FIG. 4 is prepared. In this embodiment, the short-circuit device 104 is attached with an insulating member 1042 made of an insulator, but this is intended to make the insulating member 1042 and the short-circuit member 1041 of the capacitor inside the high-voltage inverter common. ..
If the purpose is only to short-circuit the filter capacitor 103 built in the unit 102, the short-circuit device 104 may only function as a short-circuit member 1041 made of a conductor, as shown in FIG. In this case, the insulator insulating member 1042 can be eliminated.

As shown in FIG. 5, the short-circuit device 104 is attached to the unit P terminal 1021 and the unit N terminal 1022 provided in the unit 102 connected to the P terminal and the N terminal of the filter capacitor 103 for expansion. As a result, the P terminal and the N terminal of the additional filter capacitor 103 can be short-circuited.

According to the above-described embodiment, the following effects can be expected.

When the unit 102 is stored by attaching a short-circuit member 1041 that short-circuits these P terminals and N terminals to the P terminals and N terminals of the expansion filter capacitor 103 built in the removable unit 102 due to the specifications. By clearly indicating in advance in the instruction manual, caution nameplate, etc. that this member should be installed in a location corresponding to the P / N terminal of the filter capacitor 103 built in 102, the operator can place the component in that location. You can install it without forgetting.
In the instruction manual and caution nameplate, for example, along with a photograph showing the insulation state, "It is necessary to insulate the filter capacitor and short-circuit between P and N of the capacitor. A short-circuit bar with a porcelain with the following shape. Is attached to the terminal of the capacitor, and the capacitor is insulated from the main circuit while short-circuiting the P and N of the capacitor. "

Further, while the voltage of the high-voltage inverter device is being applied, it is possible to safely short-circuit the P terminal and the N terminal while insulating the P terminal and the N terminal (terminal portion) of the filter capacitor 101 which cannot be removed due to the specifications. it can.
The operation required at this time is a structure in which the P terminal and the N terminal (capacitor terminal portion) of the filter capacitor 101 need only be inserted into the terminal insertion hole 1043 of the short circuit device 104 having the short circuit member 1041 and the insulating member 1042, that is, Since the short-circuit device 104 has a configuration in which a terminal insertion hole 1043 into which the P terminal 1011 and the N terminal 1012 of the filter capacitor 101 are inserted is formed in the short-circuit member 1041, the P terminal and the N terminal (capacitor terminal portion) of the filter capacitor 101 are formed. When the main circuit P wiring 1031 and the main circuit N wiring 1032 connected to the above are flexible members such as electric wires, they can be easily applied to an existing system without modification.

Further, the P terminal and the N terminal can be safely short-circuited during long-term storage of the expansion filter capacitor 103 built in the removable unit 102 according to the specifications.
At that time, even if the filter capacitor 103 is built in the unit 102 and is arranged in a place that cannot be easily accessed, the unit P terminal and the unit N terminal (conductor) 1021 connected to the P terminal and the N terminal of the capacitor. By making the structure that 1022 is exposed on the outer surface of the unit 102, by connecting the short-circuit member 1041 to the unit P terminal and unit N terminal (conductor) 1021 and 1022, the P terminal and N terminal of the capacitor itself The same effect as when the short-circuit member 1041 is connected to the circuit can be obtained.

Further, by setting the mounting position of the short-circuit device 104 during unit storage to the interface portion between the unit 102 and the device main body 100, the short-circuit device 104 and the device main body 100 interfere with each other when the unit 102 is attached to the main body device 100. As an obstacle, the operator can be aware of the existence of the short-circuit device 104 again, and at the same time, the risk of forgetting to attach the short-circuit device 104 to the main body device 100 can be eliminated.

Further, by adopting a structure in which the short-circuit device 104 is attached to the unit 102 itself during storage of the unit 102, it is possible to prevent the short-circuit device 104 including the short-circuit member 1041 from being lost.
The short-circuit device 104 is difficult to store and manage when it is removed from the device main body 100 or the unit 102. For example, even when the short-circuit device 104 is attached to the unit 102, if the operator does not know the existence of the short-circuit device 104, the existence of the short-circuit device 104 is forgotten, and the short-circuit is forgotten even though it is a place where the short-circuit is necessary. There is a risk. With respect to this risk, the risk of forgetting to short-circuit can be prevented by clearly indicating the attachment location of the member in the unit 102 of the short-circuit device 104 in the instruction manual or the caution nameplate in advance.

100 Device body 101 Filter capacitor 102 Detachable unit by specification 103 Filter capacitor built into the removable unit by specification 104 Short circuit device 1041 Short circuit member (conductor)
1042 Insulation member (insulator)
1043 Terminal insertion holes 106, 107 Unit with built-in filter capacitor with built-in filter capacitor 108 Unit without built-in filter capacitor without built-in filter capacitor

Claims (8)

In a short-circuit device that short-circuits between the P terminal and N terminal of a filter capacitor
A terminal short-circuit holding portion that short-circuits between the P terminal and the N terminal of the filter capacitor and holds the P terminal and the N terminal, and the main circuit wiring P or the main circuit N wiring connected to the P terminal and the N terminal. A short-circuit device comprising a wiring insulation holding portion for insulating the main circuit P wiring or the main circuit N wiring. In the short-circuit device according to claim 1,
The short-circuit holding portion is
It has a short-circuit member that short-circuits the P terminal and N terminal of the filter capacitor that cannot be taken out from the device body due to the specifications and the expansion filter capacitor provided in the unit that can be taken out from the device body due to the specifications.
The wiring insulation holding portion is
It has an insulating member that insulates the non-removable filter capacitor from the main circuit P wiring or the main circuit N wiring.
A short circuit device characterized by that. In the short-circuit device according to claim 2.
The short-circuit member comprises a plate-shaped conductor including a terminal insertion hole for inserting a P terminal and an N terminal of the filter capacitor.
The insulating member is made of an insulator.
A short circuit device characterized by that. In a short-circuit unit device that short-circuits between the P terminal and N terminal of the expansion filter capacitor
It consists of a combination of a unit that incorporates the expansion filter capacitor and is removable from the main body of the device and a short-circuit device that short-circuits the expansion filter capacitor.
The unit has a unit P terminal and a unit N terminal connected to the P terminal and the N terminal of the expansion filter capacitor.
The short-circuit device has a short-circuit member that is attached to the unit P terminal and the unit N terminal and short-circuits between the P terminal and the N terminal of the expansion filter capacitor when the unit is taken out from the device main body.
A short-circuit / unit device characterized in that it can be stored for a long period of time in a state where the P terminal and the N terminal of the filter capacitor are short-circuited. In the short-circuit / unit device according to claim 4.
The unit P terminal and the unit N terminal are attached so as to be exposed from the unit.
The short-circuit member is formed of a plate-shaped conductor that is attached to the unit P terminal and the unit N terminal when the unit is removed from the main body of the apparatus and short-circuits between the P terminal and the N terminal of the expansion filter capacitor.
A short-circuit / unit device characterized by this. In the short-circuit / unit device according to claim 4.
A short-circuit / unit device, characterized in that the location where the P terminal and N terminal of the filter capacitor are associated with the short-circuit device is specified in the filter capacitor or the instruction manual of the filter capacitor. A terminal short-circuit holding part that short-circuits between the P terminal and N terminal of the filter capacitor and holds the P terminal and N terminal, and the main circuit wiring P wiring or main circuit N connected to the P terminal and the N terminal. This is a short-circuit method in which the P terminal and the N terminal of the filter capacitor are short-circuited by a short-circuit device having a wiring insulation holding portion that insulates the wiring and the filter capacitor and holds the main circuit N wiring or the main circuit P wiring. hand,
Remove the main circuit P wiring and the main circuit N wiring from the P terminal and N terminal of the filter capacitor that cannot be taken out from the main body of the device.
The short-circuit device is attached to the P terminal and N terminal of the filter capacitor from which the main circuit P line and the main circuit N wiring have been removed, and the P terminal and N terminal of the filter capacitor are provided by a short-circuit member in the terminal short-circuit holding portion of the short-circuit device. Short circuit between
When a unit that can be taken out from the main body of the device is taken out, the P terminal and N of the filter capacitor built in the unit via the unit P terminal and the unit N terminal formed in the unit by the short circuit member in the terminal short circuit holding portion. A short-circuiting method characterized by short-circuiting between terminals. In the short-circuit method according to claim 7,
Further, one of the main circuit P wiring and N wiring removed from the P terminal and N terminal of the filter capacitor is connected to the insulating member of the wiring insulation holding portion.
Connect the other of the main circuit P wiring and N wiring to the P terminal or N terminal of the filter capacitor.
A short-circuiting method characterized in that the filter capacitor is insulated from the main circuit P or N wiring and the P terminal and the N terminal of the filter capacitor are short-circuited.

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