Allen-Bradley Powermonitor 3000 User Manual page 344

Glossary 20
Publication 1404-UM001D-EN-E - October 2004
initiator pulses
Electrical impulses generated by pulse-initiator mechanisms installed
in utility revenue meters. Each pulse indicates the consumption of a
specific number of watts. These pulses can be used to measure energy
consumption and demand.
input register
This is a Modbus mapped location used for reading word length data.
For a Powermonitor 3000 slave device, the locations are defined by
the Modbus Memory Map.
lagging current
The current flowing in an AC circuit which is mostly inductive. If a
circuit contains only inductance the current lags the applied voltage
by 90 degrees. Lagging current means lagging power.
leading current
The current flowing in a circuit which is mostly capacitive. If a circuit
contains only capacitance the current leads the applied voltage by 90
degrees. Leading current means leading power factor.
load
Any device or circuit consuming power in an electrical system.
load shedding
The removal of load from the line to limit load and control demand
level.
load restoring
The energizing of loads that were previously removed from the line to
limit load and control demand level.
Modbus
Industrial communication network protocol created by the Modicon
Corporation.
neutral
The conductor chosen as the return path for the current from the load
to the source. It is also a voltage reference point in a power system.