34 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 2: PRODUCT DESCRIPTION
METERING DISPLAY
Summary:...............................................................displays present values of voltage, current, real power,
reactive power, power factor, and frequency on a per-phase
and total basis
Phasors: ..................................................................digital and graphical display of present voltage and current
magnitudes and angles
Sequence components:...................................displays present magnitudes and angles of current and
voltage sequence components
Energy:.....................................................................four-quadrant display of accumulated energy
Demand: .................................................................present and peak demand values for current and real,
reactive, and apparent power
MAINTENANCE DISPLAY
Input and output status: .................................displays the current status of all contact inputs and outputs
Hardware specifications
AC CURRENT
CT rated primary:................................................1 to 50000 A
CT rated secondary:.......................................... 1 A or 5 A
Nominal frequency:........................................... 50 or 60 Hz
Relay burden:........................................................ <0.2 VA secondary
Conversion range:.............................................. 0.02 to 46 × CT rating RMS symmetrical
Current withstand: .............................................20 ms at 250 × rated, 1 second at 100 × rated, continuous at
3 × rated
AC VOLTAGE
VT rated secondary: ..........................................50.0 to 240.0 V
VT ratio: ...................................................................1.00 to 24000.0
Nominal frequency:........................................... 50 or 60 Hz
Relay burden:........................................................ <0.25 VA at 120 V
Conversion range:.............................................. 1 to 275 V
Voltage withstand:.............................................continuous at 260 V to neutral, 1 minute per hour at 420 V
neutral
CONTACT INPUTS
Input rating:...........................................................300 V DC maximum
Selectable thresholds:......................................24 to 250 V
Maximum current:..............................................10 mA during turn on, 0.5 mA steady-state
Recognition time:................................................<1 ms
Debounce timer: .................................................1.50 to 16.00 ms in steps of 0.25
CONTACT OUTPUTS: CRITICAL FAILURE RELAY
Make and carry for 0.2 s: ................................10 A
Continuous carry: ...............................................6 A
Break at L/R of 40 ms:......................................0.250 A at 125 V DC; 0.125 A at 250 V DC
Operate time:........................................................<8 ms
Contact material:................................................ silver alloy
CONTACT OUTPUTS: FORM-A RELAY
Make and carry for 0.2 s: ................................30 A as per ANSI C37.90
Continuous carry: ...............................................6 A
Break at L/R of 40 ms:......................................0.250 A at 125 V DC; 0.125 A at 250 V DC
Operate time:........................................................<4 ms
Contact material:................................................ silver alloy
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