GE D90 Plus Instruction Manual page 34

DEVICE OVERVIEW
Sequence of events recorder
Fault reports and fault locator
Transient recorder
Disturbance recorder
24
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.
Figure 13: Typical front panel fault report display
Plus
The D90 contains an advanced sequence of events recorder with the capability to
record up to 8000 events.
Sequence of events information can be accessed either through the front panel interface
or through the EnerVista Launchpad software. The very high sampling rate and large
amount of storage capacity available for data recording in the D90
need for installing costly standalone sequence of events recording equipment.
Plus
The D90 supports a fault report and associated fault location data. The fault report
stores data pertinent to an event that is triggered and provides the distance to the fault
location. A maximum of 15 records are stored in the nonvolatile memory providing a
comprehensive summary of events associated with a fault.
The transient recorder captures critical system data during a transient event. It is tailored
to capture shorter duration events such as faults at a high resolution. The transient
recorder can be programmed to sample at 256 samples per cycle. The D90
to 64 records in nonvolatile memory with up to one minute of storage capacity for all 16
analog channels and 128 digital channels. The transient recorder incorporates integrated
triggering. Any monitored channel may be configured to trigger the recorder.
Longer-term events are monitored by disturbance recorders, which include voltage sag,
swell and overloading. Any computed analog channel or digital channel can trigger the
disturbance recorder. The D90
to five minutes of storage capacity.
Plus
can store up to 64 records in nonvolatile memory with up
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION
Plus
can eliminate the
Plus
can store up