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VR101S
Users Manual
56
Time Measurement
Events <1 s(econd)
Accuracy
Hot to Neutral:
±0.5 cycle*
Neutral to Ground:
±1 cycle**
Resolution
Hot to Neutral:
0.5 cycle
Neutral to Ground:
1 cycle
Clock accuracy: ±2 s/day
Timer counter capacity 4.25 year (24 bit counter,
resolution 8 seconds)
* Outages are reported with ½ cycle resolution until the
VER goes into low power mode. A VER will go into the
low power mode after approximately one second of an
outage condition. In low power mode, the resolution
becomes 8 seconds.
Swell, sag, and frequency events have ½ cycle
resolution up to approximately 10 minutes after which
the resolution becomes 8 seconds.
** Neutral to Ground swells have 1 cycle resolution up to
approximately 10 minutes after which the resolution
becomes 8 seconds.