Advertisement
36
RCU and solar panel grounding
When a solar panel is fitted, in addition to
the RCU grounding described, the frame of
the solar panel must be connected using the
M12 stud provided to the M12 ground stud
of the RCU using ground wire of #6 AWG
(16 mm
) in size or larger. It is the user's
2
responsibility to provide the ground wire
and to fit in accordance with the applicable
safety guidelines.
Item
Description
A
Ground wire from solar panel to RCU
B
Ground wire
C
Ground grid or ground rod
Figure 30: RCU and solar panel grounding diagram
RCU and VT grounding
When a voltage transformer is fitted, in
addition to the RCU grounding described
above, the following additional grounding is
required using ground wire of #6 AWG
(16 mm
One side of the VT secondary must be
grounded to the VT ground stud to create a
defined neutral wire in the supply to the
RCU. In the line wire, a service fuse and
point of isolation should be fitted.
The VT mounting frame must be
connected to the RCU enclosure ground
stud and to the ground grid or ground
rod. If the VT has a ground screen, it
must be grounded to the frame.
If the primary of the VT is fitted with
surge arresters, they must be grounded
to the VT mounting frame and
connected to the ground drive or ground
rod.
A
It is the user's responsibility to provide the
ground wire and to fit in accordance with
ANSI C2 (NESC).
B
C
Item
A
B
C
Figure 31: RCU and voltage transformer grounding
diagram
) in size or larger:
2
B
C
Description
Ground wire from VT to RCU
Ground wire
Ground grid or ground rod
A
Advertisement
