Frequency Calculation - GE DR60 Technical Manual

3

Frequency Calculation

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28
Waveform/Fault recorder
memory usage above 98%
Disturbance recorder
memory usage above 98%
Trend recorder memory
usage above 98%
SOE recorder memory
usage above 98%
GOOSE subscriber failure
or timeout
Warnings
Sync OK
No communication
Ethernet interface 2
Waveform/Fault recorder
memory usage above 90%
Disturbance recorder
memory usage above 90%
Trend recorder memory
usage above 90%
SOE recorder memory
usage above 90%
The DR60 calculates frequency applying a moving average filter in the derivative of the
angle of the positive sequence voltage, the angle is calculated four times per cycle and
so is the frequency.
BSE/ALARMSGGIO1. Alm6
BSE/ALARMSGGIO1. Alm7
BSE/ALARMSGGIO1. Alm8
BSE/ALARMSGGIO1. Alm9
BSE/ALARMSGGIO1. Alm10
Data Name
BSE/ALARMSGGIO1.Wrn1
BSE/ALARMSGGIO1. Wrn5
BSE/ALARMSGGIO1. Wrn6
BSE/ALARMSGGIO1. Wrn7
BSE/ALARMSGGIO1. Wrn8
BSE/ALARMSGGIO1. Wrn9
DR60
Happens when the
memory becomes 98% full
for waveform recorder
Happens when the
memory becomes 98% full
for disturbance recorder
Records memory exceeds
98% for trend recorder
Records memory exceeds
98% for SOE recorder
Time for the next expected
GOOSE message to come
exceeded
Description
Equipment not sync
Loss of communication
with ethernet interface 2
Happens when the
memory becomes 90% full
for waveform recorder
Happens when the
memory becomes 90% full
for disturbance recorder
Records memory exceeds
90% for trend recorder
Records memory exceeds
90% for SOE recorder
DR60-TM-EN-2A