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SPECIFICATIONS
1–16
PHASE & GROUND CURRENT INPUTS
CT Primary: ............................................................ 30 to 1500 A
Range:...................................................................... 0.02 to 20 × CT
Input type:.............................................................. 1 A or 5 A (must be specified with order)
Nominal frequency:........................................... 50/60 Hz
Burden: .................................................................... <0.1 VA at rated load
Accuracy: ............................................................... 3%
CT withstand:........................................................ 1 second at 100 A (1 A option)
CBCT 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)
FREQUENCY
Accuracy: ............................................................... ±0.05 Hz
Resolution: ............................................................. 0.01 Hz
Range:...................................................................... 40.00 to 70.00 Hz
PHASE VOLTAGE INPUTS
Source VT: .............................................................. 100 to 20000 V
VT secondary range:......................................... 50 to 240 V
VT ratio: ................................................................... 1.0 to 300.0 in steps of 0.1
Nominal frequency:........................................... 50/60 Hz
Relay burden: ....................................................... <0.25 VA at 120 V
Accuracy: ............................................................... ±1.0% throughout range
Voltage withstand: ............................................. 260 VAC continuous
RTD INPUTS
RTD Type:................................................................ 100 Ohm platinum (DIN.43760)
RTD Sensing Current: ........................................ 5 mA
Isolation: ................................................................. 2 kV from base unit (RMIO only)
Distance: ................................................................. 250 m maximum
Range:...................................................................... -50 to +250
Accuracy: ............................................................... ±3
Lead Resistance: ................................................. 25 Ohm max per lead
RTD Trouble Alarm: ............................................ <-50 or >250
RTD Inputs Available: ........................................ 3 with INPUT/OUTPUT option 'R' installed OR
±10 mA or ±20% of reading from 0.02 to 0.19 × CT, whichever
is greater
1 second at 400 A (5 A or universal CT option)
2 seconds at 40 × rated current
continuous at 3 × rated current
±0.2 A (4.0 A to 15 A)
o
C
o
C
o
C
12 maximum with the RMIO option connected
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION
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