Why does the 9422TF3, 9422ATF13 and 9422ATF23 have 400A fuse clips? Is it 400A rated or 200A rated?
Issue:
200 A or 400 A rating of Fuse clips for 9422TF3, 9422ATF13 and 9422ATF23
Product Line:
Operating Mechanisms, Disconnect Switches, and Door-Closing Mechanisms
Environment:
Flange Mounted Disconnect Switches
Resolution:
This is a 200A fusible switch with 400A fuse clips. It still is a 200A disconnect with 200A horsepower ratings. Overfusing is permitted by the NEC and is sometimes required to accommodate the 175% rule when sizing the power fuses. Sometimes the upper horsepower ratings for a particular NEMA size category will result in requiring the next larger fuse size when the FLA of the motor is multiplied by 175%.
200 A or 400 A rating of Fuse clips for 9422TF3, 9422ATF13 and 9422ATF23
Product Line:
Operating Mechanisms, Disconnect Switches, and Door-Closing Mechanisms
Environment:
Flange Mounted Disconnect Switches
Resolution:
This is a 200A fusible switch with 400A fuse clips. It still is a 200A disconnect with 200A horsepower ratings. Overfusing is permitted by the NEC and is sometimes required to accommodate the 175% rule when sizing the power fuses. Sometimes the upper horsepower ratings for a particular NEMA size category will result in requiring the next larger fuse size when the FLA of the motor is multiplied by 175%.
Released for: Schneider Electric USA
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