APC 10-40KW 400V UPS manual System Integration Interface

External Connection

4.2System Integration Interface

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 10-40kW 400V UPS	17