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Once installed the CTs need to be configured. See
CT Config
for details of how to configure the CTs.
If using a
single-phase
system, the wired CT sensor (
supplied
) ideally needs to be clipped around the live
conductor leaving the meter tail with the arrow (located on the side of the CT) pointing towards the consumer
unit. It is possible to use the Neutral conductor, however you will need to reverse the direction of the sensor
(arrow towards the meter).
If using a
3-phase
system
, a CT sensor (
supplied
) needs to be clipped around each live tail.
The positioning of the Grid CT sensor is crucial, please take note of the following when deciding where best to
install the sensor:
•
The sensor can be connected to any
myenergi
device with a CT input e.g. the
eddi
,
zappi
(wired sensor)
or
harvi
(wireless sensor)
•
ALL
the import and exported power must be 'seen' by the sensor. Ensure that it is installed before ANY
junction box or 'Henley Block' (if necessary, the CT can be fitted inside the consumer unit)
•
There must be only one Grid CT per-phase for the whole installation. (There can be other CTs but only one
at the grid connection point. Also note that CTs for third-party devices do not matter)
•
The CTs can be clipped on either the Live or Neutral cable on single-phase systems
Note
: On 3 phase system you can only use the Live tails
•
The arrow on the bottom of the CT sensor must be pointing towards the consumer unit (in the direction of
grid import) if on the Live cable or reversed if on the Neutral cable (single phase only)
•
Ensure the CT is fully closed and clicks shut
•
Be sure to wire the CT the correct way round:
black [–],
red [+]
. Failure to do so will see the import and
export readings swapped
8.3.1
Grid CT
The Grid CT sensor (supplied) needs to be clipped around either the Live or Neutral meter tail of the electricity
supply meter. If using the Neutral conductor, reverse the direction of the sensor (so the arrow is reversed).
The positioning of the Grid CT sensor is crucial, take note of the following when deciding where best to install
the sensor:
•
Can be connected to any
myenergi
device with a CT
input e.g. the
eddi
or
zappi
(wired sensor) or
harvi
(wireless sensor).
•
ALL of the imported and exported power must be 'seen'
by the sensor – be sure to install it upstream of ANY
junction box or 'Henley Block' (the CT can be fitted inside
the consumer unit).
•
There must be only one Grid CT per-phase for the whole
installation. (There can be other CTs but only one at the
grid connection point, also note CTs for third-party
devices do not matter).
•
The CT should be on the Live or Neutral cable.
•
The arrow on the bottom of the CT sensor must be
pointing towards the consumer unit (in the direction of
grid import) if on the Live cable, or reversed if on the
Neutral cable.
•
Ensure the CT is fully closed and clicks shut.
•
Be sure to wire the CT the correct way round; black [–],
red [+] otherwise import and export readings will be
swapped.
Summary of Contents for zappi
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