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OT100F3 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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OT100F3 Datasheet(HTML) 3 Page - List of Unclassifed Manufacturers |
3 / 8 page Disconnect switches - Nonfusible & fusible | 3 ABB differentiates itself in the disconnect switch market by offering UL98, UL508 and IEC rated switches. ABB’s UL98 listed disconnect range includes 30 to 2,000 A non-fusible and 30 to 1200 A fusible switches. These may be used in a variety of applications — on service equipment, motor control centers, or as motor branch circuits. The UL508 listed offering has clearance distances less than those required by UL98. ABB’s line of UL508 listed non-fusible disconnects ranges from 16 to 80 A and can be used as motor controllers. IEC rated switches are available from 16 - 3150 A (non-fusible) and 30 - 1200 A (fusible). Selecting disconnect switches Motor feeder Motor feeder short circuit and ground fault protection Motor disconnecting means (NEC ® 430.101 - 430.113) Motor controller (NEC ® 430.81 - 4.30.91) Motor overload protection (NEC ® 430.31 - 4.30.44) OSHA Lockout/tagout disconnect (NEC ® 430.81 - 430.91) Motor Motor branch-circuit short-circuit protection (NEC ® 430.51 - 430.58) To supply UL98 Fusible Switches OS30, OS60, OS100, OS200, OS400, OS600, OS800, OS1200 UL98 Non-Fusible Switches OT30, OT60, OT100 OT200, OT400, OT600, OT800, OT1200, OETL-NF1600 thru OETL-NF2000 UL508 Non-Fusible Switches OT16, OT25, OT40, OT63, OT80 (UL98 switches can also be applied) Typical control panel OL M Article 430 of the US National Electric Code includes two methods for properly sizing disconnect switches. Single motor application A properly sized disconnect switch for a single motor will: • Have an ampere rating greater than or equal to 115 percent of the rated motor full load current; or, • Have a HP rating greater than or equal to the rated motor HP (at applied voltage) if the disconnect switch under consideration is HP rated. Combination load application A properly sized disconnect switch for a combination load will be selected by adding all the simultaneous individual loads in the circuit under consideration. Using motor nameplate information, load information, and tables from section 430 of the NEC, determine one equivalent full load current and one equivalent locked rotor current. The equivalent locked rotor current can be used with table 430- 151 to determine an equivalent HP rating. Select a disconnect switch: • Greater than or equal to 115 percent of the equivalent full load current; or, • Greater than or equal to the equivalent HP rating. Use of UL98 & UL508 Disconnects according to NEC Article 430 |
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