Increased CU ratings for Renewables
Consumer Units requiring a larger InA performance due to the additional power generated from solar PV
With the growing introduction of renewable energy sources, Consumer Units need to provide the correct circuit protection for parallel feeds.
BS 7671 provides clear guidance on the Consumer Unit ratings when you are introducing Parallel feeds from Solar PV systems
BS 7671 Chapter 55 Switchgear assembly rating
Regulation 551.7.2 (v) requires that where the generating set may operate in parallel with the supply for distribution of electricity to the public and is connected via a low voltage switchgear and controlgear assembly. The assembly shall be selected such that:
InA > In + Ig(s)
Where:
InA is the rated current of the assembly
In is the rated current or current setting of the incoming circuit overcurrent protective device either incorporated within the low voltage switchgear and controlgear assembly or upstream of it
Ig(s) is the rated output current of the generating set or sets.
- Proven, tested solutions to accommodate up to 116 A
- Utilising bidirectional devices for alternative energy flows
- Meets requirements of both BS 7671 & BS EN 61439-3
Solutions for solar PV, 116 A InA
Access our Declaration of Conformity for Consumer Units with InA 116 A
Solar Photovoltaic (PV)
Switchgear Considerations
Learn more about Solar Photovoltaic (PV) Switchgear Considerations with Hager Academy online.
This free CPD accredited course will provide you with the correct knowledge and considerations for Solar PV installations
