CHAPTER 2: PRODUCT DESCRIPTION
SPECIFICATIONS
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
39
Metering specifications
CURRENT METERING
Type:..........................................................................phase and ground RMS current
Accuracy at 0.1 to 2.0 × CT:............................±0.25% of reading or ±0.1% of rated (whichever is greater) at
50/60 Hz nominal frequency
Accuracy at >2.0 × CT:......................................±1.0% of reading, at 50/60 Hz nominal frequency
DATA LOGGER
Channels: ................................................................1 to 16
Parameters:...........................................................any FlexAnalog value
Statistics:.................................................................maximum and time of maximum, minimum and time of
minimum, average
Alarms:.....................................................................high, high-high, low, low-low
ENERGY METERING
Type:..........................................................................positive and negative watt-hours and var-hours
Accuracy:................................................................±2.0% of reading
Range: ......................................................................–2.0 × 10
9
to 2.0 × 10
9
MWh/Mvarh
Parameters:...........................................................three-phase only
Update rate: ..........................................................50 ms
FREQUENCY METERING
Accuracy at
V
= 0.8 to 1.2 pu:........................±0.001 Hz (when voltage signal is used for frequency
measurement)
Accuracy at
I
= 0.1 to 0.25 pu: ......................±0.05 Hz (when current signal is used for frequency
measurement)
Accuracy at
I
> 0.25 pu: ...................................±0.001 Hz (when current signal is used for frequency
measurement)
PHASOR MEASUREMENT UNIT
Output format: .....................................................per IEEE C37.118 standard
Channels: ................................................................14 synchrophasors, 8 analogs, 16 digitals
TVE (total vector error):.....................................<1%
Triggering: ..............................................................frequency, voltage, current, power, rate of change of
frequency, user-defined
Reporting rate: .....................................................1, 2, 5, 10, 12, 15, 20, 25, 30, 50, or 60 times per second
Number of clients: ..............................................One over TCP/IP port, two over UDP/IP ports
AC ranges: ..............................................................as indicated in appropriate specifications sections
Network reporting format: .............................16-bit integer or 32-bit IEEE floating point numbers
Network reporting style:..................................rectangular (real and imaginary) or polar (magnitude and
angle) coordinates
Post-filtering: ........................................................none, 3-point, 5-point, 7-point
Calibration:.............................................................±5°
POWER METERING
Real power accuracy: .......................................±1.0% of reading at –1.0
≤
PF < 0.8 and 0.8 < PF
≤
1.0
Reactive power accuracy: ..............................±1.0% of reading at –0.2
≤
PF
≤
0.2
Apparent power accuracy:.............................±1.0% of reading
VOLTAGE METERING
Type:..........................................................................RMS voltage
Accuracy:................................................................±0.5% of reading from 30 to 208 volts at 50/60 Hz nominal
frequency
