Satec Expertmeter EM720 Operation Manual page 80

Chapter 5 Configuring the EM720
Parameter
Operation
mode
Polarity
Retentive
mode
Pulse width
Pulse source
Pulse rate,
kWh/Pulse
80
Options Default
UNLATHCED UNLATCHED Unlatched mode: the relay goes to its active
LATCHED
PULSE
KYZ
NORMAL (N.O.) NORMAL
INVERTING (N.C.)
NO NO
YES
20-1000 ms 100 ms
NONE NONE
kWh IMP
kWh EXP
kvarh IMP
kvarh EXP
kvarh TOT
kVAh
0.1-1000.0 1.0
kWh/Pulse
Description
state when the control setpoint is in active
(operated) state, and returns to its non-active
state when the setpoint is released.
Latched mode: the relay goes to its active state
when the control setpoint goes to active state
and remains in the active state until it is
returned to its non-active state by a local or
remote command.
Pulse mode: the relay goes to its active state
for the specified time, goes to non-active state
for the specified time and remains in the non-
active state.
KYZ mode: the relay generates transition
pulses. The relay output state is changed upon
each command and remains in this state until
the next command.
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.
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.
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.
Links a pulse relay to the internal energy pulse
source. The relay must be set into either pulse,
or KYZ mode.
Defines the pulse weight in kWh units per pulse.
EM720 Power Quality and Revenue Meter
General Meter Setup