Installation guide

22 Installation Guide Silcon DP300E 480V 120-160kVA
7OH0006 US rev. 03
4.2 System Integration Interface
4.2.1 Introduction
Single Utility
Dual Utility
The system Integration Interface (SII) is the control link between the UPS and the
system main switches as shown in the above diagram. The purpose is to ensure
correct operation of the switches without loosing the system output power.
Position information from auxiliary contacts on the main switches are the inputs for
the SII-board and the outputs are the lamp signals giving “the green light” for
operating the specific switches.
Connection
NOTE:
Use of the same designations
in your diagrams make informa-
tion exchange much easier.
WARNING!
System Integration Interface
can receive high voltage from
external alarm and signal circuit
field wiring even if all AC and
DC sources are off.
NOTE:
Refer to chapter 4.1.6
Changing from dual to single
utility input.