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CHAPTER 1: INTRODUCTION TECHNICAL SPECIFICATIONS
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL 1–7
1.2.2 Inputs
ANALOG INPUT
Range: ......................................4 to 20 mA
Accuracy:................................±1% of full scale
Alarm: .......................................programmable 4 to 20 mA
Trip:............................................programmable 4 to 20 mA
Isolation:..................................15 V isolated, active source
GROUND FAULT CURRENT INPUT
Conversion:............................true RMS, sample time 1.67 ms
Range: ......................................0.1 to 1.0
× FLC amps setpoint (for residual connection)
0.5 to 15.0 A (for 50:0.025 CT)
Full scale: ................................1.5 × FLC amps setpoint (for residual connection)
15 A (for 50:0.025 CT)
Accuracy:................................± (2% + 2), for FLC < 32 A
†
(residual connection)
± (2% + 6), for FLC ≥ 32 A
†
(residual connection)
± 0.3 A (for 50:0.025 CT)
† Accuracy given as ± ([% of reading] + [number of least significant digits])
PHASE CURRENT INPUTS
Conversion:...................... true RMS, sample time 1.67 ms
Range: ......................................0.1 to 8 × PHASE CT PRIMARY AMPS setpoint when external CTs used
0.2 to 250 A when FLC < 32 A
1 to 2000 A when FLC ≥ 32 A
Accuracy: ...............................± (2% +1)
†
Frequency: .............................20Hz - 200Hz sine wave
SUPPLY VOLTAGE
AC nominal:............................115 V AC, range 80 to 135 V AC
230 V AC, range 150 to 250 V AC
Frequency: .............................50/60 Hz
Power: ......................................25 VA (maximum), 7 VA (nominal)
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)
VOLTAGE INPUT / POWER READING
Conversion:............................true RMS, sample time 1.67 ms
Voltage full scale:................1.5
× VT primary
Voltage accuracy:...............± 2% of VT primary or 2% of reading, whichever is greater
Power accuracy:..................± 5% of nominal or ± 5% of reading, whichever is greater
Input voltage:........................120 V AC or 240 V AC nominal;
250 V AC maximum
VT burden: ..............................0.01 VA
1.2.3 Outputs
ANALOG OUTPUTS
Output:.....................................4 to 20 mA
Maximum load: ....................600
Ω
Maximum output: ...............21 mA
Accuracy:................................±1% of full scale reading
Isolation:..................................36 V isolated, active source