Dulas VC150SDD, Инструкция по установке и руководство техника

Страница: 24 / 47

VC150SDD Installation & Technician’s Manual
Page 24 of 47
14. Advice on Lightning Protection
In order to reduce the risk of damage from a lightning strike on any part of the system, please take
note of the following information:
Keep all cable routes as short and straight as possible.
If an existing lightning protection system is present please bond the array directly to this and check
whether the Dulas array earthing kit supplied is required.
Keep the solar cable and earthing cable separate by at least 1.5 metres.
Ensure that all fastenings on the array earthing kit are secure and check them every year.
For a Solar Direct Drive installation where the refrigerator is directly connected to the solar array it
is important to also connect the refrigerator cabinet to earth. This protects the equipment and any
people who may be touching the refrigerator from electric shock during fault conditions. Dulas
SDD cabinets have a dedicated earthing block on the rear of the cabinet for this purpose (see
Section 4). This earth block can be connected to the same earth rod as the solar array if a
separate earth connection is not available.
15. Advice on Surge Protection
The refrigerator has surge protection fitted (varistors) to protect the electrical circuits of the
refrigerator. These are located at the rear of the refrigerator underneath the solar array connection
point (see page 39). Please disconnect the solar array before accessing the varistors (trained
technician only).
The electrical characteristics of varistors vary widely. Only use spares supplied by Dulas to
ensure that the correct part is installed.