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Overcurrent Tripping Sensitivity Regulating Device Used For Mccb

A sensitivity adjustment, molded case circuit breaker technology, applied to emergency protection devices, circuits, electrical components, etc., can solve problems such as complexity, difficult assembly process, and reduced productivity

Inactive Publication Date: 2012-03-14
LSIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A conventional sensitivity adjustment device for an overcurrent trip mechanism has a complicated configuration of simultaneously manipulating a plurality of components to achieve sensitivity adjustment
This can make the assembly process difficult and reduce productivity
[0007] In addition, conventional sensitivity adjustment devices for overcurrent tripping mechanisms have a problem of adjusting the sensitivity corresponding to different rated currents in a molded case circuit breaker.

Method used

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  • Overcurrent Tripping Sensitivity Regulating Device Used For Mccb
  • Overcurrent Tripping Sensitivity Regulating Device Used For Mccb
  • Overcurrent Tripping Sensitivity Regulating Device Used For Mccb

Examples

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Embodiment Construction

[0020] Exemplary embodiments will now be described in detail with reference to the accompanying drawings. For brief description with reference to the drawings, the same or equivalent components will be provided with the same reference numerals, and descriptions thereof will not be repeated.

[0021] Such as figure 1 with figure 2 As shown in , the molded case circuit breaker 200 with an overcurrent trip sensitivity adjusting device according to the present invention includes a switching mechanism 220 configured to open or close a circuit, which can be rotated so as to trigger the switching mechanism 220 to the trip position to disconnect the circuit. rod 213, and a bimetal member configured to rotate the cross rod 213 by being bent by an overcurrent flowing on the circuit (refer to Figure 4 218a-1 in .

[0022] In the following, refer to image 3 The overcurrent trip sensitivity adjusting device 10 for the molded case circuit breaker 200 according to the present inventio...

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PUM

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Abstract

The invention discloses an overcurrent tripping sensitivity regulating device used for a MCCB (Molded Case Circuit Breaker). The overcurrent tripping sensitivity regulating device has a simple structure and can regulate sensitivity according to different rated current in the MCCB. The overcurrent tripping sensitivity regulating device includes a lever which is rotatable and arranged to push a cross rod with a predetermined force for the purpose of pushing the cross rod in a direction opposite to a direction in which a double metal piece pushes the cross rod when overcurrents flow in the circuit; a replaceable sensitivity regulating spring having one end contacting with the lever and providing elastics to the lever to facilitate the lever to rotate in one direction, and used for determining the pressure of the lever; and a supporting component having a surface supporting the other end of the overcurrent tripping sensitivity regulating device and arranged to support the lever in a rotary manner.

Description

technical field [0001] The present specification relates to a molded case circuit breaker, and more particularly, to an overcurrent trip sensitivity adjusting device for a molded case circuit breaker, which can have a compact configuration and can easily adjust sensitivity corresponding to different rated currents. Background technique [0002] A molded case circuit breaker is a low-voltage power device that is installed on a low-voltage power circuit below several hundred volts. When a fault current (such as an overcurrent or short-circuit current) occurs on the circuit, the device Ability to protect circuits, load equipment and users by breaking the circuit. [0003] refer to figure 1 , this molded case circuit breaker 200 includes a housing 200a and an upper cover 200b. Reference numeral 223 shows an operating handle for manually operating the molded case circuit breaker to an "on" or "off" position, and reference numerals 230 and 201 show a power supply side terminal s...

Claims

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Application Information

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IPC IPC(8): H01H71/74
CPCH01H71/16H01H71/52H01H2071/084
Inventor 宋修扬
Owner LSIS CO LTD
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