Filnor Knife Switch Single Throw, One Pole, 400 Amp Rating, 250 VDC/480 VAC

Open knife switches are used as disconnect switches on switchboards, distribution, and control panels. End users include steel mills, utility plants, transportation industry, and mining equipment.

Type A, single-throw, non-fusible knife switches have a corrosion-resistant finish, are mounted on GPO-3 bases, and have high clips and hinges. The high clips and hinges simplify the front-of-board connections. Available in 30 amp through 2000 amp.

Ratings

Ampere ratings of Type A, non-fusible, knife switches are based on a temperature rise of not more than 30 degrees C. above an ambient temperature of not more than 40 degrees C. when mounted in open air. Enclosed ratings are based on the switches being mounted in enclosures with adequate ventilation and with a bus or cable of appropriate size.

Open knife switches are used as disconnect switches mounted on switchboards, distribution, and control panel boards. Extensive uses of knife switches are found in the heavy industries and laboratories for control and test panels where visible disconnects are required.