American Power Conversion 480kW 400V manual External Connection

External Connection

NOTICE!

Consistent use of designations (Q001, Q002, Q003, H002, H003) in diagrams simplifies information exchange.

System Integration Interface (SII) is the control link between UPS and system main switches as shown in above diagram. The purpose of the SII is to ensure correct operation of switches without losing system output power.

Auxiliary contacts on the main switches transmit the SII board inputs. Lamps on Service Bypass Panel and Battery Breaker Box/Battery Cabinet indicate “green light” for operation of output switches.

SII board also integrates input facilities for emergency shut-down and temperature compensation of charge voltage for external battery (use with battery monitor). “Battery operation” and “Common fault” are two main SII board status relay signals.

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Installation Guide APC Silcon 480kW 400V UPS	9