Specifications; Protection Specifications - GE Multilin MM300 Quick Start Manual

GE
Grid Solutions
MM300 Motor Management System
Chapter 7: Specifications
NOTE:

Protection specifications

MM300 MOTOR MANAGEMENT SYSTEM – QUICKSTART 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
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 ≥ 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 CURRENT setpoint
FLA
> I
av pu
< I or timer expired
av pu
] /I ) x 100%
AV
] /I ) x 100%
FLA
AV
1