GE MOTOR MANAGER 2 - Page 15

GE Power Management
MM2 Motor Manager 2 1-5
1 INTRODUCTION 1.3 SPECIFICATIONS
1
CALCULATION METHOD: if I
AV
≥
I
FLC
:
if
I
AV
<
I
FLC
:
where
I
AV
= average phase current
I
M
= current in a phase with maximum deviation from I
AV
I
FLC
=
MOTOR FULL LOAD CURRENT
setpoint
THERMAL COOLING TIMES
RANGE: 5 to 1080 min when motor is stopped;
50% of motor stopped value when motor is running.
ACCURACY: ± 1 minute
UNDERCURRENT
RANGE: 10 to 100%
×
motor FLC or OFF
DELAY RANGE: 1 to 60 seconds
ACCURACY: ±1 second
STALLED ROTOR
RANGE: 1.15 to 4.50
×
FLC or OFF
DELAY RANGE: 0.5 to 5 seconds
ACCURACY: ±0.5 second
THERMISTOR INPUTS
SENSOR TYPES: positive temperature coefficient PTC; R
HOT
=100 to 30000
Ω
negative temperature coefficient NTC;
R
HOT
=100 to 30000
Ω
DELAY: 1 second
ACCURACY: ±5% or 100
Ω
(whichever is greater)
ANALOG INPUT
RANGE: 4 to 20 mA
ACCURACY: ±1% of full scale
ALARM: programmable 4 to 20 mA
TRIP: programmable 4 to 20 mA
COMMUNICATIONS
TYPE: RS485 2 wire, half duplex
BAUD RATE: 1200 to 19200 baud
PROTOCOL: Modbus RTU
FUNCTIONS: Read/write setpoints, Read coil status, Read actual values, Read device status,
Execute commands, Loopback Test
UB%
I
M
I
AV
–
i
AV
----------------------
100%
×
=
UB%
I
M
I
AV
–
i
AV
----------------------
100%
×
=