External tripping device for circuit breakers

A technology of tripping device and circuit breaker, applied in the direction of protection switch operation/release mechanism, etc., can solve the problems of increased processing cost, rising cost, etc., and achieve the effect of reducing manufacturing cost

Inactive Publication Date: 2015-10-21
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to miniaturize the electromagnet device, for example, it is necessary to bend the portion of the fixed core exposed to the outside of the coil to reduce the length dimension, and to bend the fixed core that is thicker than the terminal plate, etc., will incur processing costs. Problems such as increased costs due to large additions

Method used

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  • External tripping device for circuit breakers
  • External tripping device for circuit breakers
  • External tripping device for circuit breakers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0043] control Figure 1 to Figure 10 The external tripping device of Embodiment 1 will be described.

[0044] The external tripping device 1 of the present embodiment is arranged in connection with a circuit breaker 50 having one or more poles, and is used to open the connected circuit breaker 50 when the power supply voltage is abnormal. In the external tripping device 1, there is an external tripping device with a built-in exciting circuit for detecting abnormal power supply voltage and opening the circuit breaker 50, and there is also an external tripping device without a built-in exciting circuit. Describes external tripping devices with built-in field circuits. In addition, in the external tripping device 1 that does not incorporate an excitation circuit, it is provided to open the circuit breaker 50 by receiving a signal from a detection device that detects an abnormality in the power supply voltage. In addition, among power supply voltage abnormalities, there are ove...

Embodiment approach 2

[0105] control Figure 11 to Figure 15 The external trip device 1 according to Embodiment 2 will be described.

[0106] In this embodiment, it is described that if it is detected that the power supply voltage is lower than a predetermined set value (Uunder, for example, 35% to 70% of the rated voltage) lower than the rated voltage (Ue), the circuit breaker 50 is turned off. External tripping device 1 for the excitation circuit of the opening action. In addition, since the electromagnet device 16 and the drive member 13 are common to Embodiment 1, the same code|symbol is attached|subjected to a common element, and the description is abbreviate|omitted.

[0107] The drive member 13 is the same as the first embodiment, and is composed of a synthetic resin drive rod 24 and a metal support member 25 . The drive member 13 , the latch member 15 , and the display member 20 are rotatably supported around a shaft 23 held at both ends by the case 2 . Drive components 13 such as Figu...

Embodiment approach 3

[0129] control Figure 16 ~ Figure 18 The external trip device 1 according to Embodiment 3 will be described.

[0130] In the present embodiment, an excitation circuit for performing the tripping operation is not included, and whether or not the coil 32 is excited is switched based on a signal input to the connection terminal from an external detection device (not shown).

[0131] The external tripping device 1 of this embodiment does not include a circuit board 30, such as Figure 16 As shown in B, the first fixed contact plate 18a is connected to one end of the coil 32 through a wire 39a. In addition, among the pair of screw terminals 9, 9 (first screw terminal, second screw terminal), the screw terminal 9 (second screw terminal) not connected to the movable contact plate 17 is connected to the coil 32 via the wire 39b. another side. Thus, in Figure 16 In the conduction state shown in B, between the pair of screw terminals 9 and 9, the coil 32, the contact part consisti...

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Abstract

The invention provides an external tripping device of a circuit breaker which can largely maintain the size of an electromagnet device in a direction of a reel of a coil. The external tripping device of the circuit breaker comprises a box body which has an operating surface and is connected with a body of the circuit breaker, an operating par having an operating position which is exposed to the outside from the operating surface, a link mechanism which is configured inside the box body and transmits movement of an operating handle to the circuit breaker, and an electromagnet device which is configured inside the box body and has a coil which is electrified by a power supply connected with a connecting terminal arranged inside the box body and is switched between an excited state and an unexcited state when a supply voltage is abnormal and normal, when the supply voltage is abnormal, the link mechanism acts, and thus enabling the circuit breaker to carry out disconnection action. The electromagnet device is accommodated inside the box body by the way that the direction of the reel of the coil is parallel to the operating surface.

Description

technical field [0001] The invention relates to an external tripping device of a circuit breaker. Background technique [0002] In the past, if the load current exceeds the upper limit value, there is a circuit breaker that cuts off the circuit and stops the power supply to the load equipment, so as not to burn out the load equipment or the wire due to the overcurrent flowing through the short circuit (for example, refer to Japan Patent Publication No. 2000-231869; hereinafter, referred to as "document 1"). [0003] In addition, conventionally, there is a circuit breaker that cuts off a circuit when a ground fault or a short circuit is detected so that current does not flow due to a ground fault or leakage, thereby protecting the circuit. [0004] The shape and size of such circuit breakers are standardized or standardized in various countries or regions, and the circuit breaker disclosed in the above document 1 conforms to the DIN standard widely used in European and Asian...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/24
Inventor 稻次崇筱原启记山添宏一田中毅中道义也
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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