Relay Outputs - Landis+Gyr E450 User Manual

Description of Unit
Energy registers
Rates
Rate control
Four-quadrant
measurement
Channel configuration
1.6

Relay outputs

D000029326 en g – E450 PLC 1-phase ZCX100Px – User Manual
Each measurement channel has a total energy register assigned to it.
24 rated energy registers can be assigned to one of the measurement
channels by means of parameterisation.
All internal registers have 9 digits. The internal register magnitude is Wh
(Watt-Hours). Internal registers cannot be reset, when the register reaches
999999999, it rolls over to 0. The display and readout formats vary from the
internal format.
The meter is designed for up to 6 rates. The assignment of the rate regis-
ters is done by means of parameterisation.
Rate control is performed by the built-in time of use (TOU).
The reactive energy (±Rc, ±Ri) is allocated to the four quadrants as follows:
+ kvarh
+Rc
Quadrant II
Export -A
- kWh
Quadrant III
-Ri
- kvarh
Fig. 1.4 Four-quadrant measurement
The 5 measurement channels register fixed defined measurement quantities
as given in the table below:
Description
ME1 Active energy import
ME2 Active energy export
ME3 Active energy combined total, absolute
value
ME9 Reactive energy import
ME10 Reactive energy export
Relay output 1 (terminals 23 and 24) can be configured either as 90 mA
solid state relay or as 5 A mechanical on-off latching relay.
Relay output 2 (terminals 25 and 26) is an 8 A mechanical normal open
relay.
Both relay outputs of the E450 meters can be operated in normal mode or
inverted mode. The inversion can be controlled either remotely or via the
user interface.
In the inverted mode the relay functions are inverted, i.e. the relay will
report state "open" if it is closed, and state "closed" if it is open. Similarly,
the inverted relay will open after command "close", and will close after
command "open".
+R
+ kvarh
+Ri
Quadrant I
+A Import
Quadrant IV
-Rc
- kvarh
-R
+ kWh
+A (QI+QIV)
-A (QII+QIII)
|+A|+|-A|
+R (QI+QII)
-R (QIII+QIV)
11/54
OBIS code
1.8.0
2.8.0
15.8.0
3.8.0
4.8.0
© Landis+Gyr