Equipment Manager Features; Metering And Monitoring Features - GE D90 Plus Instruction Manual

DEVICE OVERVIEW
Scalable hardware

Equipment manager features

NOTE:

Metering and monitoring features

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For additional information, refer to:
Synchrocheck on page 450
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The D90 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.
Critical assets, such as circuit breakers and the station battery, are monitored with the
Plus
powerful D90 condition monitoring and diagnostic features. The D90
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 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 the operating personnel to detect any
abnormality and take corrective actions. A comprehensive equipment-monitoring feature
Plus
of D90 reduces the downtime of your assets and improves the availability of the power
system.
Only the battery monitor and breaker arcing current features are supported in the current
Plus
version of the D90 .
Figure 11: Circuit breaker monitoring example
For additional information, refer to:
Equipment manager on page 493
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:
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D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION
Plus
processes the