Inputs - GE 339 Instruction Manual

CHAPTER 1: INTRODUCTION

Inputs

339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CONTACT INPUTS
Inputs:.......................................................................10
Selectable thresholds: ......................................17, 33, 84, 166 VDC
Recognition time: ................................................1/2 cycle
Debounce time: ...................................................1 to 64 ms, selectable, in steps of 1 ms
Continuous current draw:...............................2 mA
Type:..........................................................................opto-isolated inputs
External switch: ...................................................wet contact
Maximum input voltage:..................................300 VDC
PHASE & GROUND CURRENT INPUTS
CT Primary:.............................................................30 to 1500 A
Range: ......................................................................0.05 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: ................................................................±1% of reading at 1× CT
CT withstand: ........................................................1 second at 100 × rated current
CBCT INPUT (50:0.025)
Range: ......................................................................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 to 300 in steps of 1
Nominal frequency: ...........................................50/60 Hz
Accuracy: ................................................................±1.0% throughout range
Voltage withstand: .............................................260 VAC continuous
RMIO RTD INPUTS
RTD Type: ................................................................100 Ohm platinum (DIN.43760)
RTD Sensing Current:.........................................5 mA
Isolation:..................................................................2 kV from base unit
Distance: .................................................................250 m maximum
Range: ......................................................................-50 to +250
Accuracy: ................................................................±2
Lead Resistance: .................................................25 Ohm max per lead
±3% of reading from 0.2 to 20 × CT
±20% of reading from 0.05 to 0.19 × CT
2 seconds at 40 × rated current
continuous at 3 × rated current
±0.2 A (4.0 A to 15 A)
o
C
o
C
SPECIFICATIONS
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