Instruction Manual

REVISION 9/04 BJF
86
RECOMMENDED GRANULATOR MOTOR BRANCH CIRCUIT
PROTECTION PER THE 1996 NEC CODE BOOK RULES
FOR STANDARD EFFICIENCY MOTORS*
(NEMA DESIGN B, C & D)
Motor horsepower Voltage Time delay fuses Circuit
breaker
Auto
trans
Circuit breaker
Across the line
Motor circuit
protection
Amp rating
Motor circuit
protection
Trip range
50 200 300A 400A 400A 400A 875-1750A
50 208 250A 400A 400A 400A 875-1750A
50 230 250A 350A 350A 250A 625-1250A
50 460 125A 175A 175A 100A 300-1000A
50 575 100A 150A 150A 100A 300-1000A
60 200 350A 450A 450A 400A 875-1750A
60 208 300A 450A 450A 400A 875-1750A
60 230 300A 400A 400A 400A 875-1750A
60 460 150A 200A 200A 150A 450-1550A
60 575 125A 175A 175A 100A 300-1000A
75 200 400A 600A 600A Not recommended Not recommended
75 208 400A 500A 500A Not recommended Not recommended
75 230 350A 500A 500A Not recommended Not recommended
75 460 175A 250A 250A 250A 500-1000A
75 575 150A 200A 200A 150A 450-1550A
100 200 500A 800A 800A Not recommended Not recommended
100 208 500A 700A 700A Not recommended Not recommended
100 230 500A 600A 600A Not recommended Not recommended
100 460 225A 350A 350A 400A 625-1250A
100 575 200A 250A 250A 150A 450-1550A
125 200 600A 800A 800A Not recommended Not recommended
125 208 600A 800A 800A Not recommended Not recommended
125 230 500A 800A 800A Not recommended Not recommended
125 460 300A 400A 400A 400A 875-1750A
125 575 225A 300A 300A 400A 625-1250A
150 200 800A 1200A 1200A Not recommended Not recommended
150 208 800A 1000A 1000A Not recommended Not recommended
150 230 700A 1000A 1000A Not recommended Not recommended
150 460 350A 500A 500A 400A 1000-2000A
150 575 300A 400A 400A 400A 625-1250A
200 200 1000A 1400A 1400A Not recommended Not recommended
200 208 1000A 1400A 1400A Not recommended Not recommended
200 230 800A 1200A 1200A Not recommended Not recommended
200 460 450A 600A 600A Not recommended Not recommended
200 575 350A 500A 500A Not recommended Not recommended
250 200 1200A 2000A 2000A Not recommended Not recommended
250 208 1200A 2000A 2000A Not recommended Not recommended
250 230 1200A 1600A 1600A Not recommended Not recommended
250 460 500A 800A 800A Not recommended Not recommended
250 575 400A 600A 600A Not recommended Not recommended
300 200 1500A 2000A 2000A Not recommended Not recommended
300 208 1500A 2000A 2000A Not recommended Not recommended
300 230 1200A 2000A 2000A Not recommended Not recommended
300 460 650A 1000A 1000A Not recommended Not recommended
300 575 500A 800A 800A Not recommended Not recommended