| 摘要 |
<p>The present invention provides a operating mechanism (1) and a compact circuit breaker (5) wherein short circuit release (2) is placed at an angle with respect to horizontal and is optimized in a manner so that enough space is available at the top for mechanism(1) and space for divergent de-iron plates at the bottom. With respect to short circuit release (2), moving contact (6) of mechanism (1) is placed in such a way that, during short circuit fault; plunger (10) of release pushes tripping latch (8) which hits to moving contact assembly (6,7). Also the present invention allows to place de-iron plates in slanted manner i.e. divergent de-iron plates in arc chamber (3), which gives higher blow out force during short circuit and hence fault clearing becomes fast. In addition to this, more number of de-iron plates than conventional method can be placed in arc chamber (3), which causes fast quenching of arc and hence clearing short circuit fault. Variable thermal assembly (4) is placed at right side of 45 mm cutout area (20). Trip plate (16) is sensitive to overload current, when overload current is above threshold value, it operates tripping latch (8) of mechanism (1) and turn the circuit breaker (5) to off. This threshold value is controlled through control knob (17), which is accessible to end user.</p> |
