3.3 Clamp Installation
Correct positioning of the current sensor clamp is vital to the operation and efficiency of the immerSUN.
Incorrect installation may result in increased electrical costs to the user.
The clamp should be located at the
main incoming grid supply
to the building. This will be the supply
from the main electric meter (NOT the PV generation meter). Close the clamp around one of the cables
(Live or Neutral) from the meter, this can be at the meter location or inside the consumer unit.
IMPORTANT!
Ensure the clamp is securely closed around the cable.
Connect the clamp wire to the CT terminals inside the immerSUN. Don't worry about polarity as the
immerSUN will figure it out during setup.
PV connected via Henley Block
If the PV system is connected via a 'Henley Block' then the clamp should be installed on the grid side of
the block, i.e. between the meter and Henley block.
More than one consumer unit
Where there is more than one consumer unit, the clamp should be installed at the primary incoming
supply (i.e. before it splits).
Three phase supply
One immerSUN will only work on one of the phases, the clamp MUST be installed on the SAME PHASE
that is wired to the immerSUN, the inverter MUST be on the SAME PHASE also.
If the inverter is 3-phase, then the immerSUN will only 'see' the import/export on that phase, therefore not
all of the export power can be utilised.
Extending the clamp cable
The clamp wire can be extended if required, however due to the small signal from the clamp, twisted-pair
cable should be used to help eliminate possible interference. The maximum cable length is 50m. Most
types of twisted-pair cable can be used, e.g. Beldon cable, Cat.5, telephone cable etc.
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