Chapter 5 Configuring the EM720
General Meter Setup
EM720 Power Quality and Revenue Meter
85
Parameter Options Default
Description
Polarity NORMAL
(N.O.)
INVERTING (N.C.)
NORMAL
Normal polarity: the relay is normally de-
energized in its non-active state and is
energized in its active (operated) state.
Inverting polarity: the relay is normally
energized in its non-active state and is de-
energized in its active (operated) state. It is
called failsafe relay operation.
Retentive
mode
NO
YES
NO
Applicable for latched relays only.
Non-retentive mode: the relay always returns to
its non-active state upon power up.
Retentive mode: the relay status is restored to
what it was prior to loss of power.
Pulse width
20-1000 ms
100 ms
The actual pulse width is a multiple of the 1/2-
cycle time rounded to the nearest bigger value.
The pause time between pulses is equal to the
pulse width.
Pulse source
NONE
kWh IMP
kWh EXP
kvarh IMP
kvarh EXP
kvarh TOT
kVAh
NONE
Links a pulse relay to the internal energy pulse
source. The relay must be set into either pulse,
or KYZ mode.
Pulse rate,
kWh/Pulse
0.1-1000.0 1.0
kWh/Pulse
Defines the pulse weight in kWh units per pulse.
Output of Energy Pulses through Relay Outputs
To generate energy pulses through a relay output:
1. Set a relay to either pulse, or KYZ mode, and then
select a polarity (active pulse edge) for energy pulses
and a pulse width.
2. Select a source accumulator (type of energy) and the
pulse rate for your output.
3. Send your new setup to the meter.
