GE MM200 - Specifications; Protection Specifications

MM200 MOTOR MANAGEMENT SYSTEM – QUICK START GUIDE 27
MM200 Motor Management System
Chapter 6: Specifications
GE
Grid Solutions
Specifications
NOTE
NOTE:
Specifications are subject to change without notice.
Protection specifications
ACCELERATION TIMER
Pickup:......................................................................I
av
> I
cutoff
Dropout: ..................................................................I
av
< I
pu
or timer expired
Time delay:............................................................. 0.5 to 250.0 seconds in steps of 0.1
Timing accuracy: ................................................ ±500 ms or 1.5% of total time
Elements: ................................................................ trip and alarm
CURRENT UNBALANCE
Range: ...................................................................... 4 to 40% in steps of 1%
Accuracy:................................................................ ±2%
Time delay:............................................................. 1 to 60 seconds in steps of 1 s
Timing accuracy: ................................................ ±500 ms
Elements: ................................................................ trip and alarm
CALCULATION METHOD
If I
AV
≥ I
FLA
: ( [I
M
- I
AV
] /I
AV
) x 100%
If I
AV
≤ I
FLA
: ( [I
M
- I
AV
] /I
FLA
) x 100%
Where:
I
AV
= average phase current
I
M
= current in a phase with maximum deviation from I
AV
I
FLA
= MOTOR FULL LOAD AMPS setpoint