Allen-Bradley 20F - Motor Overload Protection; Short Circuit Current Rating; Short Circuit Current Ratings - Floor Mount Drives; With Cabinet Options

192 Rockwell Automation Publication 750-IN001P-EN-P - April 2017
Chapter 4 Power Wiring
Motor Overload Protection
Class 10 motor overload protection according to NEC article 430 and motor
over-temperature protection according to NEC article 430.126 (A)(2). UL
508C File E59272.
Short Circuit Current Rating
The maximum short circuit rating is 200,000 A RMS symmetrical (only 20F
and 20G drives).
The actual short circuit rating is determined by the AIC rating of the installed
fuse or circuit breaker. See page 192
for 21G drives.
Short Circuit Current Ratings
– Floor Mount Drives with
Cabinet Options
Default ratings (no added protection) shown. A“•” indicates ratings that can
be achieved with additional protection.
Table 27 - Short Circuit Current Ratings – 400V AC Input
Drive Catalog
Number
Duty
Cycle
kW Short Circuit Current Rating (kA)
Circuit Breaker
Only (P3)
(1)
Circuit Breaker with Input Contactor
(P3 with P11)
(1)
Molded Case Switch Only
(P5)
(2)
Molded Case Switch with Input Contactor
(P5 with P11)
(2)
21G…C460 LD 315 100 30 65 or
• 100 w/700…800 A Class L fuse
5 or
• 30 w/700…1200 A Class L fuse
• 30 w/700…1200 A CB
ND 250 100 30 or
• 65 w/600 A Class J fuse
65 5 or
• 65 w/600 A Class J fuse
• 30 w/600…1000 A Class L fuse
• 30 w/600…1200 A CB
HD 200 100 5 or
• 100 w/500…600 A Class J fuse
• 18 w/600…800 A Class L fuse
• 18 w/500 A CB
65 5 or
• 100 w/500…600 A Class J fuse
• 18 w/600…800 A Class L fuse
• 18 w/500 A CB
21G…C540 LD 315 100 30 65 or
• 100 w/750…800 A Class L fuse
5 or
• 30 w/750…1300 A Class L fuse
• 30 w/800…1200 A CB
ND 315 100 30 65 or
• 100 w/700…800 A Class L fuse
5 or
• 30 w/700…1200 A Class L fuse
• 30 w/700…1200 A CB
HD 250 100 30 or
• 65 w/600 A Class J fuse
65 5 or
• 65 w/600 A Class J fuse
• 30 w/600…1000 A Class L fuse
• 30 w/600…1200 A CB
21G…C567 LD 355 100 30 65 or
• 100 w/800 A Class L fuse
5 or
• 30 w/800…1300 A Class L fuse
• 30 w/800…1200 A CB
ND 315 100 30 65 or
• 100 w/750…800 A Class L fuse
5 or
• 30 w/750…1200 A Class L fuse
• 30 w/800…1200 A CB
HD 250 100 30 or
• 65 w/600 A Class J fuse
65 5 or
• 65 w/600 A Class J fuse
• 30 w/600…1000 A Class L fuse
• 30 w/600…1200 A CB
21G…C650 LD 400 100 42 65 or
• 100 w/1000…1200 A Class L fuse
5 or
• 42 w/1000…1600 A Class L fuse
• 42 w/1000…1200 A CB
ND 355 100 42 65 or
• 100 w/850…1200 A Class L fuse
5 or
• 42 w/850…1400 A Class L fuse
• 42w/900…1200 A CB
HD 315 100 30 65 or
• 100 w/700…800 A Class L fuse
5 or
• 30 w/700…1200 A Class L fuse
• 30 w/700…1200 A CB