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32
Installation process – incoming auxiliary
power connected to electronics housing
The auxiliary power cable should be
connected according to the following
process using wire of the correct
specification to ensure IP 3x rating is
maintained for the terminal compartment.
1. The auxiliary power cable is fed through
the cable gland on the RCU enclosure
(item D in Figure 3 on page 10) a
suitable amount to allow connection
into the power supply compartment.
The cable gland should be tightened to
clamp the auxiliary power cable.
2. Active and neutral of the mains cable
are connected into the power supply
compartment terminal block and
tightened in place. Ensure the correct
wire is installed into the matching
terminal block location. Connect the
ground wire as shown.
3. Select the appropriate wire entry
blanking plate from the various plates
provided. Minimize the clearance
between the slot in the blanking plate
and the external diameter of the
auxiliary power cable insulation.
4. The plastic cable barrier suitable for the
auxiliary power cable (not the one for
solar power supply) is installed in place
over the auxiliary power cable outer
insulation.
5. Fit the power compartment cover and
screw in place (torque 13 in-lb (1.5 Nm))
using screwdriver.
Unless the RCU is operated from a dedicated
power transformer mounted on the same
pole, it is recommended to install surge
arresters on both the incoming auxiliary
power wires, with the arresters grounded to
the RCU enclosure ground to the external
enclosure ground (earth) stud.
Figure 26: Auxiliary power cable connection details
A
B
Item
Description
A
Active wire
B
Neutral wire
C
Ground wire
Wire entry blanking plate - auxiliary
D
power
Installation process – incoming auxiliary
power connected to power isolation unit
If the RCU is supplied with a power isolation
unit, then the incoming auxiliary power
supply active and neutral are connected to
the terminal block in the isolator rather than
the terminal block in the electronics
housing. The specification for the auxiliary
power supply wire is the same as above.
When the power isolation unit is factory
fitted to the RCU, the power cable to the
electronics housing will be pre-fitted to the
electronics housing.
1. The auxiliary power supply cable is fed
through the cable gland on the RCU
enclosure a suitable amount to allow
connection into the power isolation unit.
The cable gland (item D in Figure 3 on
page 10) should be tightened to clamp
the auxiliary power supply cable.
2. The cover of the power isolation unit is
then removed by a suitably qualified
person by undoing the screws on the
front.
C
D
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