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NF50-HRP Datasheet(PDF) 7 Page - Mitsubishi Electric Semiconductor |
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NF50-HRP Datasheet(HTML) 7 Page - Mitsubishi Electric Semiconductor |
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7 / 105 page  6 3.1 General The primary components are: a switching mechanism, an automatic tripping device (and manual trip button), contacts, an arc-extinguishing device, terminals and a molded case. 3. CONSTRUCTION AND OPERATION Fig. 3.1 Type NF100-SP Construction Handle 1. Trip indication The automatically tripped condi- tion is indicated by the handle in the center position between ON and OFF, the yellow (or white) line cannot be seen in this posi- tion. 2. Resetting Resetting after tripping is per- formed by first moving the han- dle to the OFF position to en- gage the mechanism, then re- turning the handle to ON to re- close the circuit. 3. Trip-Free Even if the handle is held at ON, the breaker will trip if an overcurrent flows. 4. Contact On Mechanism Even in the worst case in which welding occurs owing to an overcurrent, the breaker will trip and the handle will maintain to ON, indicating the energizing state. ON OFF Trip Handle indication Arc-Extinguishing Device Mitsubishi MCCBs feature excel- lent arc-extinguishing perfor- mance by virtue of the optimum combination of grid gap, shape, and material. Trip Button (Push to Trip) Enables tripping mechanically from outside, for confirming the operation of the accessory switch- es and the manual resetting func- tion. Switching Mechanism The contacts open and close rap- idly, regardless of the moving speed of the handle, minimizing contact wear and ensuring safety. Link-mechanism operation Magnetic flux Arc extinction Magnetic force Grid Arc Contact Molded case (Base) Terminal Molded case (Cover) Automatic tripping device ON OFF ON OFF |
Similar Description - NF50-HRP |
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