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PowerLogic
TM
Series 800 Power Meter 63230-500-225A2
Chapter 4—Metering Capabilities 3/2011
36
The power meter also provides an additional energy reading that is only available over the
communications link:
• Four-quadrant reactive accumulated energy readings. The power meter
accumulates reactive energy (kVARh) in four quadrants as shown in Figure 4–7. The
registers operate in unsigned (absolute) mode in which the power meter accumulates
energy as positive.
Energy-Per-Shift (PM810 with PM810LOG)
The energy-per-shift feature allows the power meter to group energy usage based on three
groups: 1st shift, 2nd shift, and 3rd shift. These groups provide a quick, historical view of
energy usage and energy cost during each shift. All data is stored in non-volatile memory.
Configuration
The start time of each shift is configured by setting registers using the display or by using
PowerLogic software. Table 4-5 summarizes the quantities needed to configure energy-
per-shift using register numbers.
Figure 4–7: Reactive energy accumulates in four quadrants
PLSD110171
watts negative (–)
vars positive (+)
watts positive (+)
vars positive (+)
watts negative (–)
vars negative (–)
watts positive (+)
vars negative (–)
Reactive
Power In
Real
Power
In
Reverse
Power Flow
Normal
Power Flow
Quadrant
2
Quadrant
1
Quadrant
3
Quadrant
4
Table 4–4: Energy-per-shift recorded values
Category Recorded Values
Time Scales
• Today
• Yesterday
• This Week
• Last Week
• This Month
• Last Month
Energy
•Real
• Apparent
Energy Cost
• Today
• Yesterday
• This Week
• Last Week
• This Month
• Last Month
User Configuration
• Meter Reading Date
• Meter Reading Time of Day
• 1st Day of the Week