Motor Start Statistics - GE 869 Instruction Manual

CHAPTER 7: RECORDS

Motor Start Statistics

869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
• True RMS values of the phase A-B, B-C and C-A voltages (Vab, Vbc, and Vca) if VT is
delta connected.
• Three-phase real power.
• Three-phase reactive power.
• Three-phase power factor.
• Thermal capacity used (%).
• Frequency.
• Motor status.
1-second pre-trigger data and 59-second post-trigger data are recorded. The data record
ignores all subsequent triggers and continues to record data until the active record is
finished.
A total of 6 records are stored in the relay. Record # 1 is the baseline record; it is written to
only by the first start that occurs after the user clears the motor start records. Records #2
to 6 are a rolling buffer of the last 5 motor starts. A new record automatically shifts the
rolling buffer and overwrites the oldest record, #2.
The record files are formatted using the COMTRADE file format. The files can be
downloaded and displayed via EnerVista 8 Series Setup software. All the files are stored in
non-volatile memory, so that information is retained when power to the relay is lost.
The viewing, customizing and saving the Motor Start Records is the same as the Transient
Records.
Clearing start records (RECORDS > CLEAR RECORDS > MOTOR START RECORDS) clears the
stored files. The date and time are recorded when clearing. An event 'Clear Start Rec' is
sent to the Event Record. The records can also be cleared using EnerVista 8 Series Setup.
Path:
Records > Motor Start Records
Path:
Records > Motor Start Statistics 1(5)
START DATE/TIME
Range: mm/dd/yy and hh:mm:ss
Default: 01/01/08 and 00:00:00
START ACCELERATION TIME
Range: 0.000 to 250.000 s in steps of 0.001Default: 0.000 s
START EFFECTIVE CURRENT
Range: 0.00 to 20.00 x FLA in steps of 0.01Default: 0.00 x FLA
START PEAK CURRENT
Range: 0.00 to 20.00 x FLA in steps of 0.01Default: 0.00 x FLA
Up to five starts are reported. When the buffer is full the newest record overwrites the
oldest one.
MOTOR START STATISTICS
7–3