Delta MM300 Instruction Manual Page 15

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CHAPTER 1: INTRODUCTION SPECIFICATIONS
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL 1–9
GROUND CURRENT INPUT (50:0.025)
CT primary:.............................................................0.5 to 15.0 A
Nominal frequency: ...........................................50 or 60 Hz
Accuracy (CBCT):..................................................±0.1 A (0.5 to 3.99 A)
±0.2 A (4.0 A to 15 A)
Table 2: MM300 CBCT burden
PHASE CURRENT INPUTS (INCLUDING RESIDUAL GROUND CURRENT)
Range: ......................................................................0.2 to 40 A (8 × CT), direct connection up to 5 A FLA
Input type: ..............................................................combined 1 A / 5 A
Frequency:..............................................................50 or 60 Hz
Accuracy:................................................................ExtCT: ±2% of reading or ±1% of 8× CTPrimary, whichever
is greater
Direct: ±2% of reading or ±0.1 A, whichever is greater
Withstand (at 5A nominal):.............................0.2 s at 100×
1.0 s at 50×
2.0 s at 40×
continuous at 3× rated current
Table 3: MM300 phase and ground CT burden
PHASE VOLTAGE INPUTS (THREE-PHASE VOLTAGE)
Input range:...........................................................208 to 690 V
Nominal frequency: ...........................................50 or 60 Hz
Accuracy:................................................................±2% of reading, or ±1 V, whichever is greater
RTD INPUTS
Sensor type:...........................................................Three-wire RTD (100 ohm Platinum)
Sensing current:...................................................5 mA
Accuracy:................................................................±3°C
THERMISTOR INPUTS
Sensor type:...........................................................Positive temperature coefficient PTC (R
HOT
=
100 to 30000 ohms), negative temperature coefficient NTC
(R
HOT
= 100 to 30000 ohms)
Accuracy:................................................................±6% of reading or ±100 ohms, whichever is greater
Input Primary (A) Input Secondary (mA) Impedance (Ohms) VA
0.5 0.25 0.004
1 0.5 0.01
5 2.5 55 0.34
10 5.0 1.37
15 7.5 3.09
Secondary Input (A) Impedance (Ohms) VA
1.0 0.004
5.0 0.004 0.09
8.0 0.32
40.0 6.04
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