JP2016152201A - Connection terminal cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection terminal cover capable of freely changing an internal circuit configuration without the need to perform a special wiring change even in the case where a relay device is detached from a relay socket.SOLUTION: A connection terminal cover (socket cover 1) comprises: a plurality of cover-side connection terminals 10 that can be conducted with at least partial socket-side connection terminals among socket-side connection terminals in one-to-one correspondence; a plurality of internal connection terminals 43 that are conducted with the cover-side connection terminals in one-to-one correspondence; and an alternative circuit formation part 40 including a jumper member 45 capable of arbitrarily connecting/disconnecting the internal connection terminals. By arbitrarily connecting/disconnecting the internal connection terminals by the jumper member, the configuration of a circuit to be formed within the alternative circuit formation part can be freely changed. Therefore, a desired alternative circuit can be formed by the alternative circuit formation part of the connection terminal cover even without performing the special wiring change at the side of a relay connection device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connection terminal cover that is attached to a relay connection device installed in a control panel or the like instead of the relay device, and in particular, when the relay device attached to the relay connection device becomes unnecessary, the relay The present invention relates to a connection terminal cover capable of changing a circuit without removing the connection device and changing the wiring.

The control panel built in the metal closed type switchgear is provided with a relay socket (relay connection device) for mounting a relay device for electric power.
FIG. 6 is a top view of the relay socket. The relay socket 100 is a socket to which a relay device is detachably attached. The base 101, a female socket side connection terminal 103 (103a to 103d) formed on the upper surface 101a (one surface) of the base 101, and an external wiring And a plurality of external connection terminals 105 (105a to 105d) made of a conductor for connecting the two. Each external connection terminal 105 is electrically connected to each socket-side connection terminal 103 on a one-to-one basis.
7A and 7B are diagrams illustrating the relay device, in which FIG. 7A is a perspective view and FIG. 7B is a bottom view. The relay device 120 detachably attached to the relay socket 100 (FIG. 6) is, for example, a power relay, a latching relay, a solid state timer, a voltage sensor, or the like. The relay device 120 includes a male relay side connection terminal 121 (121a to 121d) that is electrically connected to each socket side connection terminal 103, and a predetermined relay circuit (not shown) that is electrically connected to the relay side connection terminal 121. I have. The relay device 120 is electrically and mechanically fixed to the relay socket 100 by fitting each relay side connection terminal 121 to each socket side connection terminal 103.
Note that guide means 107 for mounting the relay device 120 in the correct positional relationship with respect to the relay socket 100 is provided on the upper surface 101 a of the relay socket 100. Further, guided means 123 that is paired with the guide means 107 is provided on the bottom surface 120 a of the relay device 120. The guide means 107 and the guided means 123 are configured to be asymmetrical to the base 101 and the relay device 120, respectively, so that the relay device 120 can be attached to the relay socket 100 only in a specific direction. .

The relay device 120 that has become defective due to aging or the like, or the relay device that has become unnecessary due to a change in the electrical system is removed from the relay socket 100. In such a case, conventionally, all the external wirings 110 connected to the relay socket 100 are removed from the relay socket 100 and the relay socket 100 is removed, and then the external wiring is reconnected.
However, since the inside of the metal closed switchgear to which the relay socket 100 is attached is a narrow space, the wiring change operation is not easy. In addition, in order to change the wiring, it is necessary to determine in advance what kind of wiring route the external wiring is connected to which device, and what route will be used for rewiring if the wiring is changed. Need to investigate. The more the number of terminals of the relay socket 100, that is, the more external wiring connected to the relay socket 100, the more complicated this operation becomes.

Further, when the relay device 120 is removed from the relay socket 100, the circuit is in an open state (circuit stop state), so that there is a possibility that malfunction or malfunction of peripheral devices connected to the control panel may occur. In order to prevent such a situation, Patent Document 1 describes an adapter that can form a predetermined closed circuit when mounted on the relay socket 100.
The adapter is an instrument that is inserted between the relay socket and the relay device. The adapter includes a female terminal that fits the male terminal on the relay device side on the upper surface of the case, and the relay socket side on the lower surface of the case. A male terminal fitted to the female terminal is provided. A switch for switching the internal circuit by pressing is provided on the upper surface of the case. The switch operates by pressing from the relay device when the relay device is mounted, and switches the internal circuit.
When the relay device is attached to the adapter, the adapter merely passes signals, and electrically, a circuit similar to that when the relay device is directly connected to the socket is formed. On the other hand, when the relay device is removed from the adapter, the push of the switch is released and a closed circuit is automatically formed in the adapter. As a result, even when the relay device is removed from the adapter, the circuit can be prevented from being opened.

JP2013-20861A

However, in the invention described in Patent Document 1, the circuit formed inside the adapter is fixed. For this reason, in order to form a closed circuit according to the connection configuration of the external wiring connected to the relay socket, it is necessary to prepare a plurality of types of adapters according to the configuration of the closed circuit to be formed.
The present invention has been made in view of the above circumstances, and even when the relay device is removed from the relay socket, there is no need to change the wiring and the internal circuit configuration can be freely changed. An object is to provide a connection terminal cover.

  In order to solve the above-described problems, the invention according to claim 1 is a connection terminal cover that can be detachably attached to a relay connection device having a socket-side connection terminal. A plurality of cover-side connection terminals capable of being connected to at least a part of the socket-side connection terminals in a one-to-one relationship, a plurality of internal connection terminals being electrically connected to the cover-side connection terminals in a one-to-one relationship; And an alternative circuit forming portion having a jumper member capable of arbitrarily connecting and disconnecting the terminals.

The invention according to claim 2 is a connection terminal cover that can be detachably attached to a relay connection device having a socket side connection terminal, and has a one-to-one relationship with a casing and an arbitrary socket side connection terminal. And at least one jumper member provided with a plurality of cover-side connection terminals configured to be detachable with respect to the casing and electrically connected between the cover-side connection terminals. And an alternative circuit forming unit.
According to a third aspect of the present invention, there is provided a fixing means for fixing the cover side connection terminal to the casing.
The invention according to claim 4 is provided with a casing for accommodating the alternative circuit forming portion and a lid member for opening and closing an opening provided in the casing, and the lid member can visually recognize the alternative circuit forming portion from the outside. It is formed from a transparent material.

  The alternative circuit forming portion provided in the connection terminal cover of the present invention includes a jumper member that can arbitrarily connect and disconnect between the internal connection terminals, or a jumper member that has a cover-side connection terminal that is detachable from the casing. The configuration can be changed freely. Accordingly, a desired alternative circuit can be formed by the alternative circuit forming portion of the connection terminal cover without special wiring change on the relay connection device side.

It is a figure which shows the socket cover which concerns on 1st embodiment of this invention, (a) is a partially transparent perspective view which observed the socket cover from the front side, (b) is a part of the back side of (a). It is the perspective view which showed. (A) is a perspective view of an alternative circuit formation part, (b) is a figure which shows the example of a jumper terminal. It is a schematic diagram for demonstrating the example of the alternative circuit formed with a socket cover, (a) shows the circuit before the change by which the relay apparatus was mounted | worn, (b) after the change by which the socket cover was mounted | worn It is a figure which shows a circuit. It is a figure which shows the socket cover which forms the alternative circuit shown in FIG. 3, (a) is a top view of an alternative circuit formation part, (b) is AA sectional drawing of (a), (c) FIG. 4 is a sectional view taken along line BB in FIG. It is a figure which shows the socket cover which concerns on 2nd embodiment of this invention, (a) is a partially transparent perspective view of a socket cover, (b) is a perspective view which shows a jumper member and a socket side connection terminal. . It is a top view of a relay socket. It is a figure which shows a relay apparatus, (a) is a perspective view, (b) is a bottom view.

  The connection terminal cover according to the present invention is characterized in that a circuit change can be realized only by being attached to a relay socket instead of a relay device. Therefore, the removal work of the relay socket and the wiring change work are not required when removing the relay device.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .

[First embodiment]
A socket cover (connection terminal cover) according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a view showing a socket cover according to a first embodiment of the present invention, wherein (a) is a partially transparent perspective view of the socket cover observed from the front side, and (b) is a view of (a). It is the perspective view which showed a part of back side. The socket cover according to the present embodiment is characterized in that it includes an alternative circuit forming unit that constructs a circuit configuration to be constructed between external wirings when the relay device is removed from the socket cover.

  The socket cover 1 is a cover that is detachably attached to the relay socket 100 (FIG. 6) having the socket side connection terminals 103. The socket cover 1 has a plurality of cover-side connection terminals 10 (10a, 10b, 10c, 10d) that can be connected to each socket-side connection terminal 103 in a one-to-one relationship, and each cover-side connection terminal 10 has a one-to-one connection. And an alternative circuit forming unit 40 having a plurality of internal connection terminals 43 (43a, 43b, 43c, 43d). The alternative circuit forming unit 40 forms a desired alternative circuit by arbitrarily connecting or disconnecting the internal connection terminals 43 using a jumper member 45 as shown in FIG.

<Cover side connection terminal>
The cover side connection terminal 10 is a terminal paired with the socket side connection terminal 103, and has the same configuration as the relay side connection terminal 121 of the relay device 120 of FIG. That is, the cover side connection terminal 10 is a male terminal that is electrically connected to the socket side connection terminal 103, and the cover side connection terminal 10 is electrically connected to the socket side connection terminal 103 by fitting into the socket side connection terminal 103. Fixed mechanically and mechanically.
The number of cover side connection terminals 10 is sufficient if the relay device 120 is removed from the socket cover 1 as many as necessary to construct a circuit configuration to be constructed between the external wires 110. Therefore, the number of cover side connection terminals 10 may be smaller than that of the socket side connection terminals 103. That is, the socket cover 1 only needs to include the number of cover-side connection terminals 10 that can be electrically connected to at least some of the socket-side connection terminals 103.
The number of cover side connection terminals 10 is preferably the same as the number of socket side connection terminals 103 because the versatility of the socket cover 1 can be improved.

<Casing>
The socket cover 1 includes an insulating casing 20. The casing 20 accommodates the alternative circuit formation part 40 in the inside. If the casing 20 has a hollow part that can accommodate the alternative circuit forming part 40, the shape thereof can be freely selected. The cover side connection terminal 10 protrudes from the bottom surface 20 a (one surface) of the casing 20.
A lid member 23 that opens and closes the upper opening 22 of the casing is disposed on the upper portion of the casing 20. One end of the lid member 23 is rotatably connected to the casing 20 by the hinge portion 21.
The lid member 23 is made of an insulator such as resin. The lid member 23 may be transparent or opaque, but when a transparent material such as acrylic resin is used, the configuration of the alternative circuit formed in the alternative circuit forming unit 40 can be confirmed at a glance from the outside. This is preferable.
The casing 20 includes a lock unit 25 that maintains the lid member 23 in a closed state. For example, the lock means 25 can be configured by a magnet 26 disposed at a proper position of the casing 20 and a magnetic body 27 disposed on the lid member 23 and attracted to the magnet 26. The locking means is an example, and other forms of locking means may be used. For example, a hook as a hooking portion provided in the lid member 23 and a hooking portion provided in the casing and engaged with the hook may be used as the locking means, or the screw hole provided in the casing 20 and the screw hole A screw for fixing the lid member 23 to the casing 20 while being screwed to the casing 20 may be used as the locking means.
A guided means 29 that is paired with the guide means 107 of the relay socket 100 is provided on the bottom surface 20 a of the casing 20. The configuration of the guided means 29 is the same as that of the guided means 123 provided in the relay device 120, and therefore the description thereof is omitted.

<Alternative circuit forming section>
FIG. 2A is a perspective view of an alternative circuit forming portion, and FIG. 2B is a diagram illustrating an example of a jumper terminal.
The alternative circuit forming unit 40 electrically connects and disconnects the insulating substrate 41, the plurality of internal connection terminals 43 (43 a, 43 b, 43 c, 43 d) formed on the substrate 41, and any internal connection terminal 43. A detachable jumper member 45 is provided. The substrate 41 is integrated with the bottom of the casing 20, and the bottom surface of the substrate 41 constitutes the bottom surface 20 a of the casing 20.

<Internal connection terminal>
The internal connection terminals 43 are terminals formed on the substrate 41, and are electrically connected to the cover side connection terminals 10 on a one-to-one basis. The illustrated internal connection terminal 43 is a female terminal having a hollow portion into which the jumper member 45 can be inserted.

<Jumper member>
As the jumper member 45, it is desirable to use a covered electric wire with insulation coating. By using the covered electric wire, it is possible to prevent a short circuit accident or a ground fault due to contact between the jumper members 45. The jumper member 45 is preferably a flexible electric wire. Such an electric wire is relatively easy to bend and facilitates connection between the internal connection terminals 43.
Both ends of the jumper member 45 are provided with male jumper terminals 47 made of a conductor that can conduct with the internal connection terminal 43. When the jumper terminal 47 is inserted into the internal connection terminal 43, the jumper terminal 47 is engaged with the internal connection terminal 43 and becomes conductive. As the jumper terminal 47, for example, a Faston terminal, a giboshi terminal, or a banana plug as shown in FIG. 2B can be used.
By using a male terminal as the jumper terminal 47 and using a female terminal into which the jumper terminal 47 is fitted as the internal connection terminal 43, electrical fixing (conduction) by contact between conductors and mechanical fixing by fitting. Can be realized at the same time. When such a connection relationship is used, the internal connection terminal 43 only needs to be able to fix the jumper terminal 47 to such an extent that the jumper terminal 47 does not fall out naturally in a normal use state.
The internal connection terminal may be a male terminal, and the jumper terminal may be a female terminal that fits into the male terminal.

<Modification of internal connection terminal / jumper member>
The illustrated jumper member 45 is configured to be fixed to the internal connection terminal 43 by fitting. The jumper member 45 can be freely attached to and detached from the internal connection terminal 43 and can be electrically connected. You may employ | adopt the thing of such a form.
For example, the alternative circuit forming unit may include a terminal screw as the internal connection terminal, and the jumper member may include a round or Y-type crimp terminal as the jumper terminal. In this case, the jumper member is detachably fixed to the alternative circuit forming portion with a terminal screw.
Further, the alternative circuit forming unit may include an internal connection terminal and a jumper terminal as contacts that are electrically connected to each other by contact.

<Alternative circuit>
3A and 3B are schematic diagrams for explaining an example of an alternative circuit formed by the socket cover. FIG. 3A shows a circuit before the change in which the relay device is mounted, and FIG. 3B shows a circuit in which the socket cover is mounted. It is a figure which shows the circuit after a change. 4A and 4B are diagrams showing a socket cover that forms the alternative circuit shown in FIG. 3, wherein FIG. 4A is a top view of the alternative circuit forming portion, and FIG. 4B is a cross-sectional view taken along line AA in FIG. (C) is BB sectional drawing of (a).
4 and 6, when the socket cover 1 is attached to the relay socket 100, the internal connection terminal 43 of the socket cover 1 is connected via the cover side connection terminal 10, the socket side connection terminal 103, and the external connection terminal 105. The external wiring 110 is connected on a one-to-one basis. Accordingly, one internal connection terminal 43 has a function of electrically drawing one external wiring 110 into the socket cover 1.
For example, when the internal connection terminal 43c and the internal connection terminal 43d are connected by the jumper member 45, the external wiring 110c that conducts with the internal connection terminal 43c is electrically connected with the external wiring 110d that conducts with the internal connection terminal 43d. The That is, the external wiring 110c and the external wiring 110d can be electrically connected by the socket cover 1 without performing a work for directly connecting the external wiring 110c and the external wiring 110d.
Further, the circuit is opened between the internal connection terminals 43a and 43b that are not connected by the jumper member 45. That is, the circuit is the same as the state in which the external wirings are not connected.
Thus, the alternative circuit formation part 40 can form the connection relationship which should be constructed | assembled between external wiring, when the relay apparatus with which the relay socket was mounted | worn is removed. The circuit configuration can be changed simply by mounting the socket cover 1 in which a predetermined connection relationship is established in the alternative circuit forming unit 40 to the relay socket 100.

<Configuration example of alternative circuit>
An example of the alternative circuit will be described with reference to FIGS.
The power transmission system shown in FIG. 3 includes a bus line 131 and a maiden bus line 132, and the Korbus line 131 and the maiden line 132 are connected by a circuit 133 (133A shown in (a) or 133B shown in (b)). .
A circuit 133A illustrated in FIG. 3A includes a relay socket 100 to which external wiring 110 (110a, 110b, 110c, and 110d) is connected, and the relay device X is mounted on the relay socket 100. The relay device X has a contact 125, and the contact 125 is turned "ON" or "OFF" depending on the state of electricity flowing through the external wirings 110a and 110b. The relay device Y is a relay device that operates when the contact point 125 of the relay device X is “ON”. Further, the two switches S1 and S2 provided in the circuit 133 are switches for turning on or off the energization of the circuit 133.

The relay device X is removed from the power transmission system shown in FIG. 3A, and the socket side connection terminals 103a and 103b (between the external wirings 110a and 110b) are opened (disconnected), and the socket side connection terminals 103c are separated. , 103d (between external wirings 110c and 110d) is considered to be in a closed state (connected state).
Conventionally, it is necessary to remove the relay socket 100, the external wirings 110a and 110b, and the switch S1, which are unnecessary circuit members, and to connect the external wirings 110c and 110d, which is very complicated.
In the present invention, as shown in FIG. 4, the socket cover 1 in which the internal connection terminals 43 c and 43 d of the alternative circuit forming unit 40 are connected by the jumper member 45 is prepared in advance. A desired circuit 133 </ b> B can be formed as shown in FIG. 3B simply by attaching the created socket cover 1 to the relay socket 100 instead of the removed relay device 120.

  In addition, between the socket side connection terminals, basically, if there is a possibility that the connected circuit will be short-circuited, it will be opened, and if there is no possibility that the connected circuit will be short-circuited, the connection (short-circuit) will be closed. That's fine. However, since various relay devices 120 are installed in the relay socket 100, whether to open or short-circuit between the terminals is examined each time depending on the contact configuration of the relay device 120 and the optimum circuit configuration for the circuit concerned. And then you need to make a decision.

  As described above, the socket cover according to the present embodiment can form the connection relationship to be established between the external wirings in the alternative circuit forming unit when the relay device attached to the relay socket is removed. Therefore, according to the present embodiment, the circuit change accompanying the removal of the relay device can be performed only by attaching the socket cover to the relay socket, without removing the relay socket or the external wiring or connecting the external wiring. It becomes possible. Moreover, since the alternative circuit formation part can change connection relation freely with a detachable jumper member, a highly versatile socket cover can be provided.

[Second Embodiment]
A socket cover according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a view showing a socket cover according to a second embodiment of the present invention, (a) is a partially transparent perspective view of the socket cover, and (b) shows a jumper member and a socket side connection terminal. It is a perspective view. The socket cover according to this embodiment is characterized in that socket-side connection terminals are integrated with both end portions of the jumper member. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The alternative circuit forming portion 50 of the socket cover 2 includes an insulating substrate 51 integrated on the bottom of the casing 20, a plurality of through holes 53 (53a, 53b, 53c, 53d) formed in the substrate 51, and an optional A jumper member 55 having cover side connection terminals 57 and 57 inserted into the through holes 53 at both ends.
The bottom surface of the substrate 51 constitutes the bottom surface 20 a of the casing 20. Further, a guided means 29 is projected from the bottom surface 20a. The through hole 53 is formed at a position corresponding to the socket side connection terminal 103 of the relay socket 100. The two cover side connection terminals 57 and 57 of the jumper member 55 are electrically connected by a connection member 59.
The alternative circuit forming unit 50 has a fixing means for fixing the cover side connection terminal 57 to the substrate 51 and preventing the cover side connection terminal 57 from wobbling. The fixing means includes, for example, a female screw portion 54 formed on the inner peripheral surface of the through hole 53 and an outer surface of the cover side connection terminal 57 on the connection member 59 side (base end portion). It can comprise from the external thread part 58 screwed together. The fixing means is an example, and other configurations may be used as long as the cover side connection terminal 57 can be fixed to the substrate 51.

The method of using the socket cover according to this embodiment is substantially the same as that of the first embodiment. First, each cover side connection terminal 57 of the jumper member 55 is inserted into the through hole 53 from the inside of the casing 20 so as to protrude from the bottom surface 20a so that a desired alternative circuit is formed. Also. The male screw part 58 of the cover side connection terminal 57 is screwed to the female screw part 54 in the through hole 53 to fix the cover side connection terminal 57 to the substrate 51.
The guided means 29 and at least two cover-side connection terminals 57 protrude from the bottom surface 20a of the socket cover 2 thus created. When the socket cover 2 is attached to the relay socket 100, the cover side connection terminal 57 is electrically and mechanically fixed to the socket side connection terminal 103, and at the same time, a desired alternative circuit can be formed.

[Summary of actions and effects of the present invention]
<First embodiment>
This aspect is a connection terminal cover (socket cover 1) that can be detachably attached to a relay connection device (relay socket 100) having a socket-side connection terminal 103, and at least one of the socket-side connection terminals. A plurality of cover-side connection terminals 10 that can be conducted one-to-one with the socket-side connection terminals of the unit, a plurality of internal connection terminals 43 that are conducted one-to-one with each cover-side connection terminal, and any internal connection terminal And an alternative circuit forming unit 40 having a jumper member 45 that can be connected to and disconnected from the connector.
According to this aspect, the configuration of the circuit formed in the alternative circuit forming unit can be freely changed by arbitrarily connecting and disconnecting the internal connection terminals with the jumper member. Accordingly, a desired alternative circuit can be formed by the alternative circuit forming portion of the connection terminal cover without special wiring change on the relay connection device side.

<Second embodiment>
The present embodiment is a connection terminal cover (socket cover 2) that can be detachably attached to a relay connection device (relay socket 100) having a socket-side connection terminal 103, and includes a casing 20 and an arbitrary socket-side connection. A plurality of cover-side connection terminals 57 configured to be electrically connected to the terminals on a one-to-one basis and detachable from the casing, and at least one connection member 59 for electrically connecting the cover-side connection terminals. And an alternative circuit forming unit 50 including one jumper member 55.
According to this aspect, the configuration of the circuit formed in the alternative circuit forming portion can be freely changed by attaching and detaching the jumper member having the cover side connection terminal to the casing. Accordingly, a desired alternative circuit can be formed by the alternative circuit forming portion of the connection terminal cover without special wiring change on the relay connection device side.

<Third embodiment>
This aspect is characterized by including fixing means (the female screw portion 54 and the male screw portion 58) for fixing the cover side connection terminal 57 to the casing 20.
The connection terminal cover of the second aspect is configured to attach and detach the cover side connection terminal itself. According to this aspect, since the cover side connection terminal is fixed to the casing, the cover side connection terminal is prevented from wobbling.

<Fourth embodiment>
This aspect includes a casing 20 that houses the alternative circuit forming portions 40 and 50, and a lid member 23 that opens and closes an opening (upper opening 22) provided in the casing. The lid member visually recognizes the alternative circuit forming portion from the outside. It is made of a transparent material that can be used.
According to this aspect, the configuration of the alternative circuit formed in the alternative circuit formation unit can be confirmed at a glance from the outside.

  S1, S2 ... switch, 1, 2 ... socket cover (connection terminal cover), 10 ... cover side connection terminal, 20 ... casing, 20a ... bottom surface, 21 ... hinge part, 22 ... upper opening (opening), 23 ... lid 25, lock means, 26 ... magnet, 27 ... magnetic body, 29 ... guided means, 40 ... alternative circuit forming part, 41 ... substrate, 43 ... internal connection terminal, 45 ... jumper member, 47 ... jumper terminal, 50 ... Alternative circuit formation part, 51 ... Board, 53 ... Through hole, 54 ... Female screw part, 55 ... Jumper member, 57 ... Cover side connection terminal, 58 ... Male screw part, 59 ... Connection member, 100 ... Relay socket (relay Connection device), 101 ... Base, 101a ... Top surface, 103 ... Socket side connection terminal, 105 ... External connection terminal, 107 ... Guide means, 110 ... External wiring, 120 ... Relay device, 12 a ... bottom 121 ... relay connection terminal, 123 ... the guide means, 125 ... contact, 131 ... upper bus, 132 ... Otomo line, 133, 133a, 133B ... circuit

Claims (4)

A connection terminal cover detachably attachable to a relay connection device having a socket side connection terminal,
A plurality of cover-side connection terminals that can be electrically connected to at least a part of the socket-side connection terminals, and a plurality of internal connection terminals that are electrically connected to each of the cover-side connection terminals. And a substitute circuit forming part having a jumper member capable of arbitrarily connecting and disconnecting the internal connection terminals. A connection terminal cover that can be detachably attached to a relay connection device having a socket side connection terminal,
A casing,
A plurality of cover side connection terminals configured to be electrically connected to any one of the socket side connection terminals on a one-to-one basis and detachable from the casing, and a connection for electrically connecting the cover side connection terminals. A connection terminal cover comprising: an alternative circuit forming portion including at least one jumper member provided with a member.   The connection terminal cover according to claim 2, further comprising fixing means for fixing the cover side connection terminal to the casing.   A casing that houses the alternative circuit forming portion and a lid member that opens and closes an opening provided in the casing, and the lid member is made of a transparent material that allows the alternative circuit forming portion to be visually recognized from the outside. The connection terminal cover according to claim 1, wherein:

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