GE Multilin MM300 - SPECIFICATIONS; Protection specifications

MM300 MOTOR MANAGEMENT SYSTEM – QUICKSTART GUIDE 1
MM300 Motor Management System
Chapter 7: Specifications
GE
Grid Solutions
Specifications
NOTE
NOTE:
Specifications are subject to change without notice.
Protection specifications
ACCELERATION TIMER
Pickup:......................................................................I
av
> I
pu
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
AUXILIARY UNDERVOLTAGE
Pickup level:........................................................... 60 to 90% of NCV
Time delay: ............................................................ 1 to 60 seconds in steps of 1
Timing accuracy:................................................ ± 500 ms
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 CURRENT setpoint