GE D90 Plus - Equipment Manager Features; Metering and Monitoring Features

CHAPTER 2: PRODUCT DESCRIPTION PRODUCT DESCRIPTION
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 15
For additional information, refer to:
Synchrocheck
on page 450
Scalable hardware
The D90
Plus
is available with a multitude of input and output configurations to suit the
most demanding application needs. The expandable modular design allows for easy
configuration and future upgrades. Types of digital outputs include trip-rated form-A and
solid-state (SSR) relays available with optional circuit continuity monitoring and current
detection to verify continuity and health of the associated circuitry.
Equipment manager features
Critical assets, such as circuit breakers and the station battery, are monitored with the
D90
Plus
. The D90
Plus
processes the interrupted current of the breaker, the auxiliary contact
status of the breakers, spring compressor operating time and frequency, compressor
motor current, SF6 pressure stages and the circuit breaker trip and close coil monitoring to
alert the operator of an impending circuit breaker problem. Up to two breakers, associated
trip, close coils and station battery can be monitored in real time. These features are
available through the front panel interface in real time, allowing operating personnel to
detect any abnormality and take corrective action. A comprehensive equipment-
monitoring feature of D90
Plus
reduces the downtime of your assets and improves the
availability of the power system.
NOTE
NOTE:
Only the battery monitor and breaker arcing current features are supported in the current
version of the D90
Plus
.
Figure 10: Circuit breaker monitoring example
For additional information, refer to:
Equipment manager
on page 493
Metering and monitoring features
Voltage, current, and power metering are built into the protection platform as a standard
feature. Current parameters are available as total waveform RMS magnitude, or as
fundamental frequency only RMS magnitude and angle (phasor).
Measured values include
• Voltage phasors
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