Transient Recorder - GE 845 Instruction Manual

DEVICE

Transient Recorder

4–48
IP ADDRESS
Range: Standard IPV4 network address format
Default: 0.0.0.0
SLAVE ADDRESS
Range: 1 to 254 in steps of 1
Default: 254
MODBUS PORT
Range: 0 to 10000 in steps of 1
Default: 502
POLL RATE
Range: OFF, 3 to 120 minutes in steps of 1
Default: 3 minutes
TRIGGER
Range: Any FlexLogic operand
fault: Off
The Transient Recorder contains waveforms captured at the same sampling rate as the
other relay data at the point of trigger. By default, data is captured for all AC current and
voltage inputs available on the relay as ordered. Transient record is generated upon
change of state of at least one of the assigned triggers: "Trigger Source", "Trigger on
Pickup", "Trigger on Operate", "Trigger on Alarm", or "Trigger on Trip".
The number of cycles captured in a single transient record varies based on the number of
records, sample rate, and the number of selected channels. There is a fixed amount of data
storage for the Transient Recorder: the more data captured, the less the number of cycles
captured per record. Since the 9 analog channels are captured in the record by default,
and the number of digital channels minimally affect the length of the record, the cycles per
record are well approximated in the following table.
Number of Records Sample Rate
1 128
1 64
1 32
1 16
1 8
8 128
8 64
8 32
8 16
8 8
16 128
16 64
16 32
16 16
16 8
Path: Setpoints > Device > Transient Recorder
Analog Channels
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Length-Cycles
250
450
751
1127
1503
55
100
167
250
334
29
53
88
132
176