User's Manual

16
POWER AND ENERGY CONSUMPTION
#8: Power and energy
consumption
FIBARO Dimmer 2 allows for the active power and energy consump-
tion monitoring. Data is sent to the main Z-Wave controller, e.g. Home
Center. Measuring is carried out by the most advanced micro-control-
ler technology, assuring maximum accuracy and precision.
Electric active power - power that energy receiver is changing into a
work or a heat. The unit of active power is Watt [W].
Electric energy - energy consumed by a device through a time
period. Consumers of electricity in households are billed by sup-
pliers on the basis of active power used in given unit of time. Most
commonly measured in kilowatt-hour [kWh]. One kilowatt-hour is
equal to one kilowatt of power consumed over period of one hour,
1kWh = 1000Wh.
CAUTION
FIBARO Dimmer 2 in
the 3-wire connection
has the power and
energy measurement
function. In case of the
2-wire connection this
function is available
only for load of cosφ
≥ 0.99. In other cases
power is estimated
and can dier from ac-
tual power consumed
by the device.
!
CAUTION
FIBARO Dimmer 2
stores periodically
(every 5 minutes) the
consumption data
in the device mem-
ory. Disconnecting
the module from the
power supply will not
erase the energy con-
sumption data.
!
Resetting consumption memory:
Dimmer 2 allows to erase stored consumption data in three ways:
a) By resetting the device (see „Operating the device” on page 12).
b) Using functionality of a Z-Wave controller (see the controller’s man-
ual).
c) Manually clearing the data using the following procedure:
1. Make sure that the device is connected to the power supply
2. Press and hold the B-button for a few seconds, until LED indica-
tor glows GREEN
3. Release the B-button.
4. Press the B-button briey
5. Energy consumption memory has been erased
FGD-212
3-wire connection 2-wire connection
Bright-
ness>70%
Bright-
ness<70%
Bright-
ness>70%
Bright-
ness<70%
resistive load
+/- (0.5 %
+ 0.2W)
+/- (2 %
+ 0.2W)
+/- (2 %
+ 0.2W)
+/- (4 %
+ 0.2W)
resistive-
inductive load
+/- (0.5 %
+ 0.2W)
+/- (2 %
+ 0.2W)
Power
metering
approximate*
Power
metering
approximate*
resisitve-
capacitive load
+/- (0.5 %
+ 0.2W)
+/- (2 %
+ 0.2W)
Power
metering
approximate*
Power
metering
approximate*
NOTE
Power measurement
in the 2-wire connec-
tion does not include
mains voltage uctu-
ations within +/- 10%.
i
Table of power measurement accuracy:
* Measurements in this
case are only illustra-
tive, returned values
may dier from the
actual measurement.
In the case of report-
ing incorrect values
change the values of
parameters 58 and 59.