Rockwell Automation 825 Smart Motor Manager User Manual - Manual (Page 77)

Functions 3-44
Publication 825-UM001B-EN-P January 2001
Table 3.W Short Circuit Setting Parameters
➊ –5…60 ° C (23…140 ° F)
Earth (Ground) Fault Protection with a Core Balance Current Transformer
This function is integrated into the Cat. No. 825-MST option card. Refer to page 3-28 .
Stalling During Start
Function
If the motor stalls during the starting phase, the motor heats up very rapidly reaching the
temperature limit of the insulation after the permissible stalling time. Large, low-voltage
motors, and especially medium- to high-voltage motors often have short, permissible stalling
times, although their starts may be considerably longer. Accordingly, the permissible stalling
time must be set higher on the basic unit in these instances. With an external speedometer or
zero speed switch, the Smart Motor Manager recognizes that stalling has occurred during
starting, and it switches the motor off immediately. Thus, the motor and the driven
installation are not exposed to unnecessary or unacceptable stress from stalling.
Trip ➊
Function
Factory setting Off
Response Level
Setting range 4…12 ,
e
Factory setting 10 ,
e
Setting increments 0.5 ,
e
Tripping Delay
Setting range 20…990 ms
Factory setting 50 ms
Setting increments 10 ms
Output Relay
Selection (relays) #1, No output relay
Factory setting #1