GE
Grid Solutions
MM200 Motor Management System
Chapter 6: Specifications
NOTE:
Protection specifications
MM200 MOTOR MANAGEMENT SYSTEM – QUICK START GUIDE
Specifications
Specifications are subject to change without notice.
OTE
ACCELERATION TIMER
Pickup:......................................................................I
Dropout: ..................................................................I
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
≥ I
: ( [I
- I
AV
FLA
M
AV
If I
≤ I
: ( [I
- I
AV
FLA
M
AV
Where:
I
= average phase current
AV
I
= current in a phase with maximum deviation from I
M
I
= MOTOR FULL LOAD AMPS setpoint
FLA
> I
av
cutoff
< I
or timer expired
av
pu
] /I
) x 100%
AV
] /I
) x 100%
FLA
AV
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