These substations are typically installed in locations accessible to the public and should ensure protection for all people according to specified service conditions. A CSS components shall be type tested and routine tested per their relevant product standards.
Functions in distribution network
- CSS’s for residential users
- Dedicated CSS for major electricity customer like light industrial or commercial user (typical 1500 KVA and higher)
- Satellite substations for the end of radial connections like a farm user
Testing according to IEC 62271-202 Standards
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Internal Arc Fault Tested CSS’s increase the safety for operators and the general public
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Internal Arc Classification (IAC) covers faults inside MV switchgear and MV interconnections to transformer
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Internal Arc Classification enclosure requires a specified testing procedure and evaluation
A (if protection to operator is proven)
B (if protection to public is proven)
AB (if protection to both operator and public is proven)
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ABB has passed IAC AB
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AC-AB to be required by the end user for network with highly condensed people
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ABB highly recommends IAC-AB for the safety of operators and public