Voltage Interruptions - Allen-Bradley Rockwell Automation 857 User Manual

4-8
Supporting Functions

Voltage Interruptions

857-UM001A-EN-P – July 2009
Table 4.6 – Recorded Values of Sags and Swells Monitoring
Parameter
Recorded Count
values
Total
Count
Total
Sag/ swell Date
logs 1...4
Time
Type
Time
Min1
Min2
Min3
Ave1
Ave2
Ave3
Max1
Max2
Max3
The device includes a simple function to detect voltage interruptions.
The function calculates the number of voltage interruptions and the
total time of the voltage-off time within a given calendar period. The
period is based on the real time clock of the device. The available
periods are:
•
8 hours, 00:00 – 08:00, 08:00 – 16:00, 16:00 – 24:00
•
one day, 00:00 – 24:00
•
one week, Monday 00:00 – Sunday 24:00
•
one month, the first day 00:00 – the last day 24:00
•
one year, 1st January 00:00 – 31st December 24:00
After each period, the number of interruptions and the total
interruption time are stored as previous values. The interruption
counter and the total time are cleared for a new period. The old
previous values are overwritten.
Value Unit
- Cumulative sag counter
- Cumulative sag time counter
- Cumulative swell counter
- Cumulative swell time counter
- Date of the sag/swell
- Time stamp of the sag/swell
- Voltage inputs that had the
sag/swell
s Duration of the sag/swell
%Un Minimum voltage value during the
sag/swell in the input 1
%Un Minimum voltage value during the
sag/swell in the input 2
%Un Minimum voltage value during the
sag/swell in the input 3
%Un Average voltage value during the
sag/swell in the input 1
%Un Average voltage value during the
sag/swell in the input 2
%Un Average voltage value during the
sag/swell in the input 3
%Un Maximum voltage value during
the sag/swell in the input 1
%Un Maximum voltage value during
the sag/swell in the input 2
%Un Maximum voltage value during
the sag/swell in the input 3
Description