MV Switchgear (IEC) Specification 1

[NickParker]

I read specification as below regarding MV switchgear

"The Switchgear shall be type-tested according IEC 62271 – 1 and shall comply with classification LSC-2B PM (i.e. a fully compartmented metal clad switchgear with metallic compartment walls) as specified in IEC 62271-200. Where no back-feeding is possible, LSC-2A, for Vacuum contactor feeders only, is acceptable."

Why only for Vacuum contactor feeders? why not for circuit breakers?

 

[RRaghunath]

VCU panels are more compact when compared with VCB panels. Hence, it is economical to accept LSC-2A.
ABB switchgear Brochure does indicate that it is possible technically to supply VCU panels with LSC-2B specification.

R Raghunath