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Installation Guide APC Silcon 480kW 400V UPS 67
6.5.5 Wiring up UPS with External Optional Dzn0 Isolation Transformer at Output
WARNING!
Isolation transformer provides galvanic isolation between mains supply and load. Do not bypass
isolation transformer in order to avoid damaging circulation currents and to prevent load from
loosing galvanic isolation.
NOTICE!
Refer to local legal regulation for wiring information.