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
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Installation Guide APC Silcon 480kW 400V UPS | 11 |