Motortronics
Page 18
4.2.1
Line Power Connections
Connect the line leads to the input terminals L1 and L2 provided on the unit. The line power must be supplied
from a source with suitable Short Circuit Protective Devices (SCPD) conforming to local and national electric
codes. Additional fusing is necessary only when the motor circuit is fused at a level too low to protect the ABC
Series per code. Recommendations for commonly available SCPDs are as follows:
UNIT RATING
SCPD
SCPD SIZED AS % OF ABC
UNIT RATING
10 – 100 Amps
Class RK5 Fuse
Class J Fuse
Circuit breaker
No greater than 250%
No greater than 400%
No allowable (fuses required)
200 – 1000 Amps
Class RK5 Fuse
Class J Fuse
No greater than 250%
No greater than 400%
Circuit breaker
No greater than 250%
WARNING!
Many motor safety disconnect switches are not rated to interrupt DC current. Replace any load side safety
disconnect switch with one that is rated for DC voltage at the motor line voltage rating or greater. As an
alternative, disconnect incoming line power before opening any load side disconnect switches in the
motor circuit during braking, and post warning labels at all affected devices. Failure to observe this
precaution may result in damage to the disconnect and /or bodily injury
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
