CABLES

Types of failure

Cables run from modules to combiner boxes, combiner boxes to inverters, inverters to transformers and have different ratings.

They may be DC or AC, and incorporate fibreoptic cores for SCADA data transmission.

Failures may occur during construction due to improper handling, installation or accidental damage by digging operations.

During plant operations, cable theft is a recurrent problem due to the high copper content of power cables. Reducing this risk requires good site security, monitoring (e.g. via infrared and CCTV) and encasing cables in concrete in extreme cases (although this makes repairs more expensive).

Defects in the insulation can cause cable failures and water ingress at termination points, and is also more prevalent as the solar farm ages.

It is important that cable connections at combiner boxes or inverter interfaces are positioned above the maximum flood elevation for the site to prevent water ingress during storm events.

AXIS EXPLORES: FAILURES, DEFECTS AND DAMAGE – GROUND MOUNT SOLAR

Disclaimer

This material is for general information and education purposes. The advice and recommendations in this document may help to reduce the risk of property loss and business interruption. Implementing these recommendations does not guarantee the avoidance of loss or that all reasonable preventative measures have been taken. By providing this advice and recommendations, AXIS does not relieve the owner or others of their duties and obligations with respect to assessing and implementing loss prevention measures. AXIS disclaims any liability with respect to loss prevention or loss mitigation programs.