Bulletin No. 3020IM9503R6/98 Power Meter
December 1998 Chapter 8—Metering Capabilities
1998 Square D All Rights Reserved 61
ENERGY READINGS
The power meter provides 3-phase total energy values for kWh, kVARh, and
kVAh (table 8-2). These values can be displayed on the power meter display,
or read over the communications link. In the default mode (unsigned), the
power meter accumulates energy as positive, regardless of the direction of
power flow (i.e., the energy value increases, even during reverse power flow
as in a tie breaker application).
Using POWERLOGIC
System Manager Software SMS-3000, SMS-1500, or
PMX-1500, the power meter can be configured to accumulate kWh and
kVARh in one of three additional modes: signed, energy in, and energy out.
In signed mode, the power meter considers the direction of power flow,
allowing the accumulated energy magnitude to both increase and decrease.
The power meter can also be configured to accumulate kWh and kVARh as
either energy into the load only or energy out of the load only. The default
accumulation mode is unsigned (absolute).
The power meter also calculates a 3-phase total apparent energy value. All
energy values are stored in nonvolatile memory.
Table 8-2
Energy Readings
Energy Reading, 3-Phase Reportable Range
Accumulated Energy
Real (Signed/Absolute/In/Out) 0 to 9,999,999,999,999,999 Wh
Reactive (Signed/Absolute/In/Out) 0 to 9,999,999,999,999,999 VARh
Apparent 0 to 9,999,999,999,999,999 VAh
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