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GE MM300 Instruction Manual Page 13

Motor management system low voltage motor protection and control.
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CHAPTER 1: INTRODUCTION
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
GROUND FAULT (CBCT OR RESIDUAL)
Pickup level: ........................................................... 0.5 to 15.0 A in steps of 0.1 (CBCT); 10 to 100% of FLA in
Trip time delay on start:................................... 0 to 10 s in steps of 0.1 s
Trip time delay on run: ..................................... 0 to 5 s in steps of 0.1 s
Alarm time delay on start/run:..................... 0 to 60 s in steps of 1 s
Timing accuracy: ................................................ ±50 ms or ±0.5% of total time
Elements: ................................................................ trip and alarm
LOAD INCREASE
Pickup level: ........................................................... 50 to 150% of FLA in steps of 1%
Timing accuracy: ................................................ ±500 ms
Elements: ................................................................ Alarm
MECHANICAL JAM
Pickup level: ........................................................... 1.01 to 4.50 × FLA in steps of 0.01
Time delay: ............................................................ 0.1 to 30.0 seconds in steps of 0.1
Timing accuracy: ................................................ ±500 ms
Elements: ................................................................ trip
PHASE OVERVOLTAGE
Pickup level: ........................................................... 101 to 120% of rated in steps of 1%
Time delay: ............................................................ 1 to 60 seconds in steps of 1 s
Timing accuracy: ................................................ ±500 ms
Elements: ................................................................ trip and alarm
PHASE UNDERVOLTAGE
Pickup level: ........................................................... 60 to 99% of rated in steps of 1
Time delay: ............................................................ 1 to 60 seconds in steps of 1 s
Timing accuracy: ................................................ ±500 ms
Elements: ................................................................ trip and alarm
RTD PROTECTION
RTD types: .............................................................. three-wire (100 ohm Platinum)
Range: ...................................................................... –50 to 250°C in steps of 1
Hysteresis:.............................................................. 2°C
THERMAL MODEL
Standard curve time multiplier:.................... 1 to 15 in steps of 1
Thermal overload pickup: ............................... 1.01 to 1.25 in steps of 0.01
Motor full load current (FLA):.......................... 0.5 to 1000 A in steps of 0.1
Motor rated voltage:.......................................... 100 to 690 V AC
Curve biasing:....................................................... phase unbalance (±5%) hot/cold ratio stator RTD
Update rate: .......................................................... 3 cycles
Hot/cold safe stall ratio:................................... 1 to 100% in steps of 1%
Timing accuracy: ................................................ ±200 ms or ±2% of total time (based on measured value)
Elements: ................................................................ trip and alarm
THERMISTOR
Sensor types: ........................................................ PTC (R
Timing accuracy: ................................................ ±500 ms
Elements: ................................................................ Trip and alarm
UNDERCURRENT
Pickup level: ........................................................... 1 to 100% of FLA in steps of 1
Time delay: ............................................................ 1 to 60 seconds in steps of 1
Timing accuracy: ................................................ ±500 ms
Elements: ................................................................ trip and alarm
steps of 1% (residual)
exponential running and stopped cooling rates
= 100 to 30 kohms); NTC (R
HOT
SPECIFICATIONS
= 100 to 30 kohms)
HOT
1–7

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