JP3371547B2 - Low voltage circuit breaker with terminal block - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-voltage circuit breaker having a terminal block for connecting an electric wire drawn from an auxiliary device and an electric wire connected to an external device, and to a low-voltage circuit breaker having a different number of poles. On the other hand, the present invention relates to the configuration improved so that the above-mentioned accessory device can be shared.

[0002]

2. Description of the Related Art As a low-voltage circuit breaker for protecting a low-voltage circuit from an overload condition, a ground fault condition, etc., a circuit breaker for opening a circuit when an overcurrent is detected, or a ground circuit in addition to an overcurrent protection. It is well known that an earth leakage circuit breaker, which also has a function of opening an electric circuit when a fault current is detected, is widely used. Among these low-voltage circuit breakers are auxiliary devices built into the low-voltage circuit breaker (for example, auxiliary contacts for detecting the open / close operation state of the low-voltage circuit breaker, alarm contacts for detecting trip operation state, voltage A disconnecting device, etc.) and a wire for connecting an electric wire connected to an external device installed outside the low-voltage circuit breaker to each other. Actual exploitation Sho 63-17625
It is known from the publication No. 1 and the like.

Below, based on the low-voltage circuit breaker having a terminal block disclosed in Japanese Utility Model Laid-Open No. 63-176251,
A low-voltage circuit breaker having a terminal block of the conventional example will be described for the case where the low-voltage circuit breaker is a circuit breaker. Figure 4
FIG. 5 is a partially cutaway front view showing a 4-pole circuit breaker having a terminal block of a conventional example, and FIG.
FIG. In FIGS. 4 and 5, reference numeral 8 is a four-pole wiring breaker in which well-known mechanisms (not shown) for detecting an overload and interrupting the electric path when the overload is detected are incorporated. Reference numerals 811 to 814 are terminals on the power supply side that are provided in the wiring breaker 8 and that connect an electric wire (not shown) that is connected to a power supply. Reference numerals 821 to 824 are provided in the wiring breaker 8 and are connected to a load. Is a terminal on the load side for connecting an electric wire (not shown).

Here, the terminal 811 and the terminal 821 are the power source for the R pole and the terminal on the load side, respectively, when the circuit breaker 8 is applied to a three-phase four-wire circuit. Similarly, the terminals 812 and 822 are the S pole power source and the load side terminal, the terminals 813 and 823 are the T pole power source and the load side terminal, and the terminals 814 and 824 are the neutral poles. Is a power source for the N pole and a terminal on the load side. Reference numeral 83 is a voltage trip device as one of the auxiliary devices, and an electric wire 831 is drawn from the voltage trip device 83.

A terminal block 7 is composed of four terminals 71 and a mounting base 72 for integrally holding the terminals 71. A space 721 is formed below the portion of the mounting base 72 that holds the terminal 71. Electric wire 83
The electric wire drawn out from the auxiliary device such as 1 is drawn into the terminal block 7 through the space 721 as shown in FIG. Connected from below. Here, the voltage trip device 8
Since 3 is installed in the T pole, its electric wire 831 is drawn out from the wiring breaker 8 after bypassing the mechanism installed in the N pole, as shown in FIG.

The circuit breaker 8 and the terminal block 7 to which the electric wire drawn from an accessory such as the electric wire 831 is connected,
It is a circuit breaker having a terminal block (hereinafter may be abbreviated as a circuit breaker with a terminal block) 9. In addition, an electric wire (not shown) connected to an external device (not shown) installed outside the circuit breaker 9 with a terminal block generally has a circuit breaker 9 with a terminal block installed on a distribution board or the like. After being attached to the body, each terminal 71 is connected from the upper surface side of the terminal block 7.

FIG. 6 is a partially cutaway front view of a circuit breaker for wiring of three poles having a conventional terminal block. 6, the same parts as those of the wiring breaker having the conventional terminal block shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 6, reference numeral 8A is a three-pole wiring breaker in which well-known mechanisms (not shown) for detecting an overload and interrupting the electric path when the overload is detected are incorporated. The wiring breaker 8A has terminals 811 to 813 as terminals on the power supply side.
And terminals 821 to 823 as terminals on the load side. Then, the electric wire 831 drawn out from the voltage trip device 83 has no N pole installed, as shown in FIG. 6, so that it is drawn out from the wiring breaker 8A without detouring.

The circuit breaker 8A and the terminal block 7 to which an electric wire drawn from an accessory device such as the electric wire 831 is connected,
It is a circuit breaker 9A having a terminal block. As the low-voltage circuit breaker used for the low-voltage circuit breaker having a terminal block, there are known cases where a leakage circuit breaker is applied in addition to the circuit breakers 8 and 8A. Further, it is also known that the terminal block provided in the low-voltage circuit breaker having the terminal block does not have the void 721.

[0009]

In the low-voltage circuit breaker having the terminal block according to the above-mentioned prior art, an electric wire drawn from the auxiliary device such as the electric wire 831 is provided between the auxiliary device provided in the low-voltage circuit breaker and the external device. , And an electric wire connected to an external device, through a terminal block, for example, to appropriately monitor the operating state of the low-voltage circuit breaker, to perform a protective operation, etc. with a relatively simple configuration It is possible. However, in the low-voltage circuit breaker having the terminal block according to the conventional technique, the following problems still remain. That is, the length of the electric wire drawn from the accessory device differs depending on the number of poles of the low-voltage circuit breaker, as illustrated in FIGS. 4 and 6 for the electric wire 831. Therefore, it is necessary to prepare an auxiliary device having an electric wire that needs to be pulled out from the low-voltage circuit breaker, depending on the number of poles of the low-voltage circuit breaker. For this reason, there are an extremely large number of types of attached devices, and for example, it takes a lot of time to manufacture and manage them.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a low-voltage cutoff having a terminal block, which is provided with an auxiliary device which can be commonly used for different numbers of poles. To provide a container.

[0011]

[Means for Solving the Problems ]
For this reason, the present invention is: 1) Devices used for overload protection and ground fault protection of electric circuits, which detect overload / ground faults and open / close / cut off electric circuits, and these mechanisms. And a terminal block for connecting the electric wire connected to an external device installed outside the low-voltage circuit breaker, and a low-voltage circuit breaker including an auxiliary device from which the electric wire is drawn In the low-voltage circuit breaker having a terminal block provided with, the electric wire drawn from the accessory device and connected to the terminal block is provided with a changing means for arbitrarily changing a connection distance between the accessory device and the terminal block , The changing means is a male connector and a female connector, which are installed in the middle of the auxiliary device and the terminal block, and which mate with each other to form a pair, and separate these connector pairs, and Use connectors to connect these connectors to each other at both ends. The connection distance between the accessory device and the terminal block can be arbitrarily changed by connecting extension wires each having a male connector and a female connector that can be combined . 2 ) It is a device used for overload protection and ground fault protection of electric circuits. It is a mechanism that detects overload and ground faults, opens and closes the circuit, and shuts down the circuit. A terminal block for connecting the above-mentioned electric wire and an electric wire connected to an external device installed outside the low-voltage circuit breaker, and the terminal block. Has a terminal for connecting an electric wire drawn from an auxiliary device and an electric wire connected to an external device to each other, and a mounting base for holding this terminal, and a terminal of the mounting base. A space is formed on the lower side of the part holding the wire, and the electric wire taken out from the accessory device is connected to the terminal of the terminal block through this space. , In low-voltage circuit breaker with terminal block, The wires that are pulled out from the device and connected to the terminal block should be connected to each other in the middle of the auxiliary device and the terminal block.
It has a male connector and a female connector to be mated with each other.
In addition , the extra length portion is stored in the above-mentioned empty space of the terminal block .

[0012]

In the present invention, in the low-voltage circuit breaker having the terminal block, the electric wire pulled out from the accessory device and connected to the terminal block is used to arbitrarily change the connection distance between the accessory device and the terminal block. A changing means, for example, a male connector and a female connector, which are installed in the middle of the accessory device and the terminal block and are paired with each other by interlocking with each other, and disconnecting these connector pairs,
Moreover, using these connector pairs, connect extension wires, each having a male connector and a female connector, which can mate with these connectors at both ends. In the case where an electric wire having a longer length is required as an electric wire to be drawn out from the auxiliary device, the changing means for arbitrarily changing the connection distance between the auxiliary device and the terminal block is provided. Prepare an extension wire with the required length. Then, by connecting this extension wire to the middle part of the wire drawn out from the accessory device by using the male and female connectors, a wire having a longer length is obtained. Of. As a result, it is possible to obtain an electric wire with an appropriate length from an electric wire having a basic length as an electric wire to be drawn out from the accessory device, and the accessory device having the electric wire that needs to be extracted is commonly used for different numbers of poles. Becomes possible. In addition, the wire that is pulled out from the accessory device and connected to the terminal block is configured so that the extra length of the wire is stored in the empty space that the terminal block has. The length is prepared as a maximum length considering the maximum number of poles of the low-voltage circuit breaker to be applied. Then, when the length of the electric wire becomes excessive by applying it to a low-voltage circuit breaker having a small number of poles, the extra length portion is folded, for example,
Store in the above-mentioned empty space of the terminal block. As a result, the electric wire drawn from the accessory having the maximum length of electric wire can be used for the low-voltage circuit breaker with an appropriate number of poles, and the accessory having the electric wire that needs to be pulled out can be shared for different pole numbers. Is possible.

In the above paragraph, a structure is provided in which an electric wire that is pulled out from the accessory device and connected to the terminal block is provided in the middle of the accessory device and the terminal block with a male connector and a female connector that mate with each other. In order to prepare an electric wire that is pulled out from the accessory device and has a maximum length that takes into account the maximum number of poles of the low-voltage circuit breaker to be applied, for example, make the length shorter than the maximum length. And the electric wire connected to the terminal block (having a length that is the difference between the length of the electric wire drawn from the auxiliary device and the above-mentioned maximum length) separately. These wires are prepared and interconnected by a male connector and a female connector. This makes it possible to separately prepare the accessory device and the electric wire on the side of the terminal block, so that the accessory device having the electric wire that needs to be pulled out can be shared for different pole numbers and the maximum length can be increased. It is easy to obtain an accessory device in which an electric wire having a length is pulled out.

[0014]

Embodiments of the present invention will be described in detail below with reference to the drawings. Embodiment 1; FIG. 1 is a front view showing essential parts of a low-voltage circuit breaker having a terminal block according to an embodiment of the present invention corresponding to claim 1 in a state of being separated from each other. Is the case without an extension wire, (b)
Is the case with an extension wire. In FIG. 1, FIG.
The same parts as those of the low-voltage circuit breaker having the terminal block according to the conventional example shown in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. In addition, in FIG. 1, the reference numerals given in FIGS.
Only representative symbols are shown.

In FIG. 1, reference numeral 1 is a voltage trip device 83 as one of auxiliary devices, an electric wire 831a pulled out from the voltage trip device 83, and an end portion of the electric wire 831a on the side of the non-voltage trip device 83. Voltage trip device as an auxiliary device having a lead wire (hereinafter referred to as a voltage trip device with a lead wire or a lead wire as a generic name), which is composed of a male connector 4 as a changing means attached to the It may be abbreviated as an attached accessory). In addition, 2 is a terminal block 7
And an electric wire 831b connected to the terminal 71 of the terminal block 7 as in the conventional example, and a female connector 5 as a changing means attached to the end of the electric wire 831b on the side opposite to the terminal 71. , A terminal block with electric wires. Where the wire 831a
In this case, the sum of the length of the electric wire 831b and the length of the electric wire 831b is equal to the electric wire 831 of the conventional three-pole circuit breaker 8A.
It has the same length as the length of.

Further, 3 is composed of an electric wire 31 of the same type as the electric wires 831a and 831b, and a male connector 4 and a female connector 5 attached to each end of the electric wire 31. It is an extension wire. Here, the electric wire 831a and the electric wire 831
In this case, the sum of the lengths of b and the electric wire 31 has a length equivalent to that of the electric wire 831 included in the conventional four-pole circuit breaker 8 for wiring. .

In the embodiment shown in FIG. 1, the extension electric wire 3 has the female connector 5 and the electric wire 8 due to the above-mentioned structure.
31a is connected to the electric wire 831a by fitting it to the male connector 4 and the male connector 4 is connected to the electric wire 831.
The electric wire 83 can be obtained by fitting the female connector 5 of b.
It is possible to connect with 1b. As a result, the extension electric wire 3 is used in the case of 4 poles which requires an electric wire having a long length, and the extension electric wire 3 is used in the case of 3 poles which does not require an electric wire having a long length. By not doing so, it becomes possible to share the voltage trip device 83 having the electric wire that needs to be pulled out with the wiring breaker having a different number of poles. Therefore, in general terms, as a lead wire for an accessory device with a lead wire, it has an appropriate length from an electric wire having a basic length (for example, the electric wire 831a and the electric wire 831b described above). Since it is possible to obtain an electric wire, it becomes possible to commonly use the auxiliary device with a drawn electric wire for a circuit breaker for wiring having a different number of poles.

In this case, by connecting the electric wire 831b to the terminal block 7 in advance, it is possible to easily perform the work of connecting the electric wire between the accessory device and the terminal block 7. Be created. In the above description of the first embodiment, the changing means included in the wiring breaker having the terminal block is the male connector 4 and the female connector 5 forming a pair, but It is not limited.

Embodiment 2 FIG. 2 is a side view showing a main part of a low voltage circuit breaker having a terminal block according to another embodiment of the present invention. 2, the same parts as those of the low-voltage circuit breaker having the terminal block according to the conventional example shown in FIGS. 4 to 6 are designated by the same reference numerals, and the description thereof will be omitted. In addition, in FIG. 2, about the code | symbol attached | subjected in FIGS. 4-6, only the typical code | symbol was described.

In FIG. 2, the electric wire 831 drawn from the voltage trip device 83 as one of the accessory devices is an electric wire having a length that can also be used for a circuit breaker for four poles. When this electric wire 831 is used as a circuit breaker for wiring of three poles and the length thereof becomes excessive, the excess length portion is, for example, as shown in FIG. It is folded and stored in a space 721 formed in the mounting base 72 of the terminal block 7.

In the embodiment shown in FIG. 2, the voltage trip device 83 having the wire of the maximum length is provided by the above-mentioned configuration.
Therefore, the electric wire 831 drawn out from can be used for a wiring breaker having an appropriate number of poles. Therefore, in general terms, it becomes possible to share the auxiliary device with the lead wire with respect to different numbers of poles.

Embodiment 3; FIG. 3 is a side view showing an essential part of a low-voltage circuit breaker having a terminal block according to an embodiment of the present invention corresponding to claim 2. In FIG. 3, the same parts as those of the low-voltage circuit breaker having the terminal block according to the embodiment of the present invention shown in FIG. 2 and the low-voltage circuit breaker having the terminal block according to the conventional example shown in FIGS. The reference numerals are given and the description thereof is omitted. In addition, in FIG. 3, about the code | symbol attached | subjected in FIGS. 4-6, only the typical code | symbol was described.

In FIG. 3, 6 is an electric wire 831a, an electric wire 831b, a male connector 4 attached to the end of the electric wire 831a on the anti-voltage trip device 83 side, and an opposite terminal 71 side of the electric wire 831b. Is an electric wire that connects between the voltage trip device 83 and the terminal block 7, which is constituted by the female connector 5 attached to the end of the. Here, the electric wire 831a and the electric wire 8
It is assumed that the sum of the lengths of 31b has a length equivalent to the length of the electric wire 831 included in the conventional four-pole wiring breaker 8 of the prior art.

In the embodiment shown in FIG. 3, with the above-mentioned structure, when preparing the electric wire 6 for connecting the voltage trip device 83 and the terminal block 7, the electric wire 831a having a length shorter than the maximum length is prepared. Voltage trip device 8
3 and an electric wire 831b having a length that is a difference between the length of the electric wire 831a and the maximum length described above are individually prepared, and these electric wires 831a and 831b are connected to the male connector 4 and the female connector 5. Interconnect with each other. This makes it possible to prepare wires that are attached to the accessory device and wires that are attached to the terminal block separately, so that the wire with the maximum length can be used. The attached auxiliary device can be easily obtained.

In this case, therefore, the accessory device with a pull-out wire and the terminal block 7 to which the wire 831b is connected can be separately prepared, so that the wire between the accessory device and the terminal block 7 is long. Even in the case of having a length, there is an advantage that it is possible to easily attach the auxiliary device with a pull-out electric wire to the low-voltage circuit breaker and to perform an interconnection work of this electric wire.

[0026]

The present invention has the following effects due to the above-mentioned configuration. The low pressure circuit breaker having a terminal block according to the invention, the wire is pulled out from the accessory device incorporated in the low pressure circuit breaker is connected to the terminal block, disposed intermediate the accessory device and the terminal block, male mating with each other With the configuration including the changing means composed of the mold type connector and the female type connector, it becomes possible to commonly use the auxiliary device with the drawing wire for different numbers of poles. As a result, the number of types of accessory devices can be reduced, and, for example, the time required for manufacturing and managing the accessory devices can be shortened, and the manufacturing cost of the low-voltage circuit breaker having a terminal block can be reduced. In addition, the wires that are pulled out from the auxiliary equipment built into the low-voltage circuit breaker and connected to the terminal block are stored in the empty space of the terminal block with the extra length, and the auxiliary equipment and the terminal By providing a male connector and a female connector that mate with each other in the middle of the stand, in addition to the effect of the above item, the auxiliary device with a lead wire and the wire on the terminal block side are provided. Since they can be prepared separately, it is possible to easily obtain an accessory device in which an electric wire having the maximum length is drawn out. As a result, it is possible to further reduce the manufacturing cost of the low voltage circuit breaker having the terminal block.

[Brief description of drawings]

1 is a front view showing main parts of a low-voltage circuit breaker having a terminal block according to an embodiment of the present invention corresponding to claim 1 in a state of being separated from each other, and FIG. Without a cable, (b) with an extension wire

FIG. 2 is a side view showing a main part of a low voltage circuit breaker having a terminal block according to another embodiment of the present invention.

FIG. 3 is a side view showing an essential part of a low-voltage circuit breaker having a terminal block according to an embodiment of the present invention corresponding to claim 2 ;

FIG. 4 is a partially cutaway front view of a 4-pole wiring breaker having a terminal block of a conventional example.

5 is a view on arrow AA in FIG.

FIG. 6 is a partially cutaway front view of a three-pole wiring breaker having a terminal block of a conventional example.

[Explanation of symbols]

1 Voltage tripping device with attached electric wire (attached device) 2 Terminal block with electric wire 3 Extension wire 31 Electric wire 4 Connector (changing means) 5 Connector (changing means) 7 Terminal block 71 Terminal 72 Mounting base 83 Voltage pulling Removal device (accessory device) 831a Electric wire 831b Electric wire

Continuation of the front page (56) Reference JP-A-3-84824 (JP, A) JP-A-3-190031 (JP, A) JP-A-61-119865 (JP, A) Actually open flat 4-8350 (JP , U) Actual development 2-150635 (JP, U) Actual development Sho 63-176251 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01H 73/20 H01H 73/02 H01H 71/08

Claims (2)

(57) [Claims] 1. A device used for protection of an electric line from overload and protection of a ground fault, which detects overload / ground fault and opens / closes a circuit.
It is connected to the low-voltage circuit breaker equipped with various mechanisms for disconnecting and an auxiliary device related to these mechanisms and in which an electric wire is drawn out, and an external device installed outside the electric wire and the low-voltage circuit breaker. In a low-voltage circuit breaker having a terminal block provided with a terminal block for connecting with an electric wire, the electric wire drawn from the accessory device and connected to the terminal block is
A change means for arbitrarily changing the connection distance between the accessory and the terminal block is provided , and the change means is the accessory and the terminal block.
A male type that is installed in the middle of
Connector and female connector, disconnect these connector pairs.
Separate them, and use these connectors to connect the ends
Male connector that can be combined with other connectors
Connect the extension wires, each with a female connector
The connection distance between the accessory and the terminal block can be
A low-voltage circuit breaker with a terminal block that is modified . 2. A device used for overload protection and ground fault protection of an electric circuit, which detects overload / ground fault and opens / closes an electric circuit.
A low-voltage circuit breaker equipped with various mechanisms for interrupting and an accessory device related to these mechanisms and in which an electric wire is drawn out, the electric wire, and an external device installed outside the low-voltage circuit breaker. And a terminal block for connecting the electric wire connected to the external device, and a terminal block for connecting the electric wire connected to the external device. Has a mounting base for holding, and a space is formed below the portion of the mounting base holding the terminal, and the electric wire taken out from the accessory device is In a low-voltage circuit breaker with a terminal block that is connected to the terminals of the terminal block through this void, the electric wire that is pulled out from the accessory device and connected to the terminal block is
Between the accessory and the terminal block, there is a male contact that assembles with each other.
A low-voltage circuit breaker having a terminal block, comprising a connector and a female connector, and an extra length of the connector is housed in the above-mentioned empty space of the terminal block.