Siemens 3AD8 User Manual

KMS-0021
51
2022-02-10
5.10.2
1 Earth wire
2 Earth
Fig. 29 RCU Earthing Diagram
5.10.3 RCU and Solar Panel Earthing
When a solar panel is fitted, in addition to the RCU earthing described above, the frame of the solar
panel must be connected using the M12 stud provided to the M12 earth stud of the RCU using earth
wire of 16 mm
2
in size or larger. It is the user’s responsibility to provide the earth wire and to fit in
accordance with the applicable safety guidelines.
1 Earth wire from Solar Panel to RCU
2 Earth wire
3 Earth
Fig. 30 RCU and Solar Panel Earthing Diagram
5.10.4 RCU and VT Earthing
When a voltage transformer is fitted, in addition to the RCU earthing described above, the following
additional earthing is required using earth wire of 16mm
2
in size or larger:
 One side of the VT secondary must be grounded to the VT earth stud to create a defined neutral
wire in the supply to the RCU. In the active wire a service fuse and point of isolation should be
fitted.
1
2
3
1
2

Siemens 3AD8 Specifications

General

Brand	Siemens
Model	3AD8
Category	Control Unit
Language	English