Equipment Manager Features - GE D90 Plus Instruction Manual

CHAPTER 2: PRODUCT DESCRIPTION
Synchronism check
Scalable hardware

Equipment manager features

NOTE:
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Execution of the automation logic is independent of protection elements and protection
logic. The automation capability is segmented into seven independent modules to simplify
implementation and testing of complex schemes in which each module is independently
editable and password protected. While building and compiling these modules, intelligent
error detection automatically notifies the users of errors such as overflows, type
mismatch, division by zero, and square root of a negative number, allowing the user to
achieve maximum optimization. The programming interface complies with the global
standard IEC 61131 for industrial control programming and also allows for embedded
comments. Easy to use on-line and off-line debugging and simulation tools provide
extensive testing capabilities of complex schemes. This includes forcing of input variables,
simulation of analog values and visualization of live logic states and live analog values.
Synchrocheck and breaker control, disconnect switch control, and local/remote breaker
control are available as hard-coded schemes as part of the D90
capabilities.
The synchrocheck elements are typically used at locations where the two parts of the
system are interconnected through at least one other point in the system, which are to be
joined by the closure of one or more circuit breakers. The D90
voltage source inputs, digital inputs and outputs, and elements to monitor differences in
voltage magnitudes, phase angles, and frequencies to perform synchronism check across
Plus
two breakers. The D90 can be used to carry out full independent control over the
breakers associated to the line when connected to a substation with a breaker-and-a-half
or ring bus arrangement.
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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
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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
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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 .
DEVICE OVERVIEW
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automation
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provides the required
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processes the
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