JPH06187892A - Terminal block for circuit breaker - Google Patents

Abstract

PURPOSE:To house a capacitor, to be electrically connected to an accessory device in a circuit breaker, in a terminal block instead of providing it outside. CONSTITUTION:A reed wire terminal part 13 is stagely formed, and the inside and outside insulating barriers 14 and 15 are arranged on both side parts. A space part is formed on the lower side of the lead wire terminal part 13, a capacitor 43 is housed in the lower side gap part 39, and the connecting lead wires 44 and 45 of the capacitor 43 are connected to the inside lead wire terminals 22a and 22c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit for connecting an external lead wire from an external device in a circuit breaker and a circuit breaker and an internal lead wire from an accessory device housed inside the circuit breaker. And the terminal block of disconnector.

[0002]

2. Description of the Related Art Auxiliary devices housed inside circuits and circuit breakers include auxiliary switches, alarm switches, voltage trip devices and undervoltage trip devices.

Usually, when the auxiliary device is composed only of an auxiliary switch and an alarm switch, these switches are housed in a circuit or a breaker, and only the lead wire is pulled out from the inside, but the voltage trip device is used. In the case of, the trip coil has a coil burnout prevention switch that cuts off the current of the trip coil after the tripping operation, and when the DC coil is used, the breaking capacity of the coil burnout prevention switch is insufficient. In some cases, a capacitor connected in parallel with the coil burnout prevention switch is provided to compensate for this.

In the case of a circuit breaker or a circuit breaker, particularly a small-sized circuit breaker or a circuit breaker, when the accessory device is housed inside, the trip coil and the coil burnout prevention switch are arranged in the circuit breaker or the circuit breaker. Since there is no space to store a large-capacity capacitor that is to be stored, it is installed outside the circuit breaker, circuit breaker, and terminal block.

Further, in the case of an undervoltage trip device, the size of the trip coil is limited, especially in a small circuit breaker or a circuit breaker, so AC is converted to DC to trip the trip coil as DC excitation. It has been attempted to increase the armature holding force of the release coil, and therefore, a rectifier for converting alternating current into direct current and a capacitor for limiting the current of the trip coil are provided.

Even in this case, conventionally, electric parts such as a rectifier and a capacitor are provided outside the circuit, the circuit breaker and the terminal block because of the space in the circuit and the circuit breaker.

[0007]

In the conventional structure, the capacitors and the rectifiers, which are the electric parts, need to secure a mounting space outside the circuit breaker and the breaker and the terminal block thereof, and the connection lead wires can be pulled out. It is troublesome to turn, and also
Since it is connected to the external lead wire terminal of the terminal block, the connection work is troublesome when connecting by the user side, especially because the number of external lead wire terminals is insufficient and double connection with other external lead wires is made. If there is, there is a risk of incorrect wiring.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to secure a mounting space for electrical components outside a circuit board, a circuit breaker, and a terminal block as much as possible. It is an object of the present invention to provide a terminal block for a circuit or a breaker, in which lead wires can be easily routed, external lead wires can be easily connected, and miswiring can be prevented as much as possible.

[0009]

DISCLOSURE OF THE INVENTION A terminal block for a circuit breaker or circuit breaker according to the present invention is provided with a pair of insulating barriers arranged in parallel with each other and one of which is attached to a side surface of the circuit breaker. And a lead wire terminal portion formed between the pair of insulating barriers and formed in a stepwise manner, and an external lead wire attached to the lead wire terminal portion and connected from an external device is connected in parallel with the insulating barrier. An external lead wire terminal; and an internal lead wire terminal to which an internal lead wire from an accessory device attached to the lead wire terminal portion and housed inside a circuit or a circuit breaker is connected. A space is formed below the space, and an electric component electrically connected to the accessory device and the internal lead wire terminal is housed in the space below the space.

[0010]

According to the terminal block of the circuit breaker and the breaker of the present invention, since the electric parts are housed in the space below the lead wire terminal,
Therefore, it is not necessary to secure a mounting space outside the circuit breaker, circuit breaker, and terminal block. Since the electrical components housed in the space below the lead wire terminal portion are electrically connected to the internal lead wire terminal of the lead wire terminal portion and the accessory device inside the circuit breaker, the external lead wire is used. It is not necessary to connect the external lead wire terminal to the external lead wire terminal, and accordingly, the external lead wire can be easily routed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The circuit breaker 10 has a cover 11 made of an insulating material and a case 12 (see FIG. 2) to form a box, and incorporates a shut-off mechanism section and an accessory device (not shown). Lead wire terminal portion 13 for forming a terminal block
Are symmetrically formed in three steps in a stepwise manner. The inner side insulating barrier 14 is provided on the side surface of the circuit breaker and the circuit breaker 10 side, and is parallel to the inner side insulating barrier 14 on the other side surface. An outer insulating barrier 15 is provided. The inner insulating barrier 14 has an opening 1 corresponding to the lead wire terminal portion 13 from the central portion to the lower end portions thereof, and the upper end surface of which has a stepped shape.
6 is formed, and two locking claws 17 project from the center.

Six external lead wire terminals 18 are attached to the upper surface of the lead wire terminal portion 13, and crimp terminals 20 of external lead wires 19 from an external device are attached to these by screws 21.
Each external lead wire 19 is screwed (see FIG. 3) by
Are arranged parallel to the inner and outer insulating barriers 14 and 15 (see FIG. 6). The six inner lead wire terminals 22 are formed integrally with the respective outer lead wire terminals 18, and are extended downward from the outer lead wire terminals 18 so as to face the inner insulating barrier 14 and have their tips. Is inclined toward the outer insulating barrier 15 side so as to retract (see FIG. 2), and a screw hole 22A is formed at the tip end thereof by burring. Then, the internal lead wire 23 of the accessory device housed in the circuit breaker 10 and the circuit breaker 10 is drawn into the lead wire terminal portion 13 from the upper end portion 16a of the opening portion 16, and the crimp terminal 24 at the tip thereof is internally fixed by the screw 25. The lead wire terminal 22 is screwed into the screw hole 22A from the side.

The terminal block cover 26 covers the upper surface of the external lead wire terminal 18 of the lead wire terminal portion 13, and
It is composed of a substrate portion 27 and two elastic leg portions 28 and 29 extending downward from both end portions thereof (see FIG. 4). Among these legs 28 and 29, engaging protrusions 28a and 28a are formed at the lower ends of the legs 28 and 28 on the outer insulating barrier 15 side.

When attaching the terminal block cover 26, the legs 28 and 29 are lowered from above the lead wire terminal portion 13 so as to be inserted between the inner and outer insulating barriers 14 and 15, and the leg portion 28 is removed. Proceeding while elastically deforming inward, the engaging protrusion 28a at the lower end is located at the outer insulating barrier 1.
When the engagement notch 30 formed in 5 is matched, it elastically returns to engage with the upper edge 30a thereof. In addition, when removing, insert a tool, for example, a driver 32 into one of the tool insertion holes 31, 31 formed in the substrate 27 so as to correspond to the legs 28, 28, and pry the driver 32 in the direction of arrow C. The engagement notch 30 of the engagement protrusion 28a (see FIGS. 3 and 4).
(Refer to FIG. 3) and then pull it upward.

The bottom portion cover 34 covers the bottom portion of the lead wire terminal portion 13, and includes a substrate portion 35 and elastic leg portions 3 extending upward from both ends of the substrate portion 35.
6 and 36. This bottom cover 34
The engaging hole 37 formed in the leg portion 36 has the lead wire terminal portion 13
It is attached by being engageably and disengageably engaged with a protrusion 38 (see FIGS. 3 and 4) that is provided so as to protrude. Thus, the lead wire terminal portion 13 and the inner and outer insulating barriers 14 and 15 configured as described above are provided with the engaging claws 17 and 17 of the inner insulating barrier 14 on the upper side of the case 12. By fitting and locking both sides of the part 12a and mounting the cover 11 on the case 12, the circuit 12 and the side face of the disconnector 10 are attached in a state of being prevented from being pulled out.

1 (a) and 1 (b) are provided with a voltage trip device 41 having a high DC voltage as an accessory device and a coil burnout prevention switch 42, which are housed in a circuit or a breaker 10. Meanwhile, the capacitor 43 for increasing the breaking capacity of the coil burnout prevention switch 42 is housed in the space 39 below the lead wire terminal portion 13. The three internal lead wires 23a, 23b, 23c drawn from the voltage trip device 41 and the coil burnout prevention switch 42 are connected to the internal lead wire terminals 22a, 22b, 22c by screws, respectively, and from the capacitor 43. The two connection lead wires 44 and 45 that have been pulled out are connected to the internal lead wire terminals 22a and 22c by screws.

As described above, according to this embodiment, the voltage tripping device 41 and the capacitor 43 electrically connected to the coil burnout prevention switch 42 are housed in the lower space 39 of the lead wire terminal portion 13. Therefore, the circuit and disconnector 10
Also, it is not necessary to secure a space for mounting the capacitor 43 outside the lead wire terminal portion 13. Since the connecting lead wires 44 and 45 from the capacitor 43 are connected to the internal lead wire terminals 22 and 22 (22a and 22c), the connecting lead wires 44 and 45 are connected to the external lead wire terminal 18
It is not necessary to connect to the external lead wire 19
It becomes easy to route.

Further, if the specifications are determined, the condenser 43
Since the manufacturer accommodates the wiring in the lower space 39 of the lead wire terminal portion 13 and performs the wiring, the user side can easily connect the external lead wire 19, and miswiring is minimized. You can do it.

7 (a) and 7 (b) show a second embodiment of the present invention. In this embodiment, an undervoltage trip device 46 is provided as an accessory device housed inside the circuit breaker 10 and the circuit breaker 10. For the DC coil electrically connected to the undervoltage trip device 46, Rectifier (full-wave rectifier bridge) 4
7 and the capacitor 48 are housed in the space 39 below the lead wire terminal portion 13. The two internal lead wires 23d and 23e drawn out from the undervoltage trip device 46 are connected to the DC side terminal of the rectifier 47 via the internal lead wire terminals 22d and 22e, respectively, and from one of the AC side terminals of the rectifier 47. The connection lead wire 49 drawn out is connected to the internal lead wire terminal 22 a, and the connection lead wire 50 drawn out from the other AC side terminal of the rectifier 47 is connected to the internal lead wire terminal 22 c via the capacitor 48. Therefore, according to the second embodiment, the same operational effect as the above embodiment can be obtained.

The present invention is not limited to the above-mentioned embodiment, and for example, the electric parts accommodated in the space below the lead wire terminal may be other than the capacitor and the rectifier. Needless to say, the present invention can be appropriately modified and implemented without departing from the scope of the invention.

[0021]

As described above, the terminal block of the circuit breaker or circuit breaker of the present invention is electrically connected to the auxiliary device inside the circuit breaker or circuit breaker and the internal lead wire terminal in the space below the lead wire terminal portion. Since the electrical parts to be connected are stored, it is possible to minimize the external mounting space outside the circuit, the disconnector and the terminal block, and the external lead wires can be easily routed accordingly. At the same time, the work of connecting the external lead wires is easy, and erroneous wiring can be prevented as much as possible.

[Brief description of drawings]

1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a side view of a terminal block seen from the inside, and FIG. 1B is a wiring diagram.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a side view of a terminal block partially broken and viewed from the outside.

FIG. 4 is a perspective view of the terminal block shown partially broken away.

FIG. 5 is a top view with the terminal block cover removed.

FIG. 6 is a diagram corresponding to FIG. 5 showing a wiring state.

FIG. 7 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

[Explanation of symbols]

In the figure, 10 is a circuit breaker or breaker, 13 is a lead wire terminal portion, 1
4 and 15 are inner and outer insulating barriers (a pair of insulating barriers), 18 is an outer lead wire terminal, 19 is an outer lead wire, 21 is a screw, 22 is an inner lead wire terminal, 23 is an inner lead wire, 25 is a screw, Reference numeral 39 is a lower space portion, 41 is a voltage trip device (accessory device), 42 is a coil burnout prevention switch (accessory device), 43 is a capacitor (electrical component), 46
Is an undervoltage trip device (accessory device), 47 is a rectifier (electric component), and 48 is a capacitor (electric component).

Claims (1)

[Claims] 1. A pair of insulating barriers arranged in parallel to each other, one of which is attached to a side surface of a circuit or a breaker, and a lead wire which is arranged between the pair of insulating barriers and is formed in a step shape. A terminal portion, an external lead wire terminal attached to the lead wire terminal portion and connected so that an external lead wire from an external device is parallel to the insulating barrier, and a circuit attached to the lead wire terminal portion. An internal lead wire terminal to which an internal lead wire from an accessory device housed inside the disconnector is connected, and a space portion is formed below the lead wire terminal portion, and the accessory device is provided in the lower space portion. A terminal block for a circuit breaker or a breaker, which is characterized in that an electric component electrically connected to the internal lead wire terminal is housed.