16 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION
• Voltage symmetrical components
• Current phasors
• Current symmetrical components
• Current true one-cycle RMS values
• Active, reactive, and apparent power
• Power factor (all power values per phase and total)
• Four-quadrant energy
•Frequency
•Synchrophasors
• Data logger
The measured signals are available for larger local display in the color LCD, accessible
remotely using communications.
Figure 11: Phasors display example
Energy metering
The metered values for real, reactive, and apparent power, as well as power factor, are
displayed via the front panel interface or through the EnerVista UR
Plus
Setup software.
Phasors
The metered values and phasor representations for phase current, ground current, phase
voltage, and auxiliary voltage are displayed on the front panel and in the EnerVista UR
Plus
Setup software.
Sequence components metering
The metered values and phasor representations for negative-sequence current and
voltage, positive-sequence current and voltage, and zero-sequence current and voltage
are displayed on the front panel and in the EnerVista UR
Plus
Setup software.
Digital fault recorder features
The data acquisition and computing platform of the D90
Plus
provides high-resolution
recording of power system parameters, replacing the need for an expensive stand-alone
digital fault recorder (DFR), resulting in capital cost savings. The digital fault recorder
features a high-resolution transient recorder (fast scan), a long-term disturbance recorder
(slow scan), and a longer sequence of events with up to 8,000 events. The internal clock
used for time-tagging events can be synchronized with an IRIG-B signal or via the SNTP
protocol over the Ethernet port. This precise time stamping allows the sequence of events
to be determined throughout the system.
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