Backfeed Protection-Enhanced Safety and Reliability
Backfeed Protection-Enhanced Safety and Reliability
Backfeed Protection-Enhanced Safety and Reliability
• Note: (AS 62040.1.1-2003 Uninterruptible power systems (UPS) — General and safety
requirements for UPS used in operator access areas, section 5.1.4 Back feed protection.)
The practical implications are that all isolators in the chain feeding the UPS must
be so identified if the UPS does not have backfeed protection.
*model dependent
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Benefits of an internal backfeed contactor
• In a centralised bypass
topology the system bypass
module (SBM) provides a
common bypass line for the
paralleled UPS modules