Chapter 13. Invertor Arrangement; Introduction; Inverter Input; Inverter Output Supply Distribution - C-DOT DSS MAX-XL Installation Manual

13.1. INTRODUCTION

Three 1 KVA inverters are provided to meet uninterrupted AC requirements of the
VDUs (Visual Display Unit) and the printers in IOP room, OMC room and the MDF
room (Test positions). All the three inverters will be in use to meet IOP room, OMC
room and MDF room power requirements. Although no spare inverter has been
provided to handle failure of any of the inverters, the output of the three inverters
has been distributed in such a fashion that in case of failure of any of the inverters,
the other two inverters will be able to handle the total load. In OMC room 4 CRP
terminals and two printer terminals will be provided out of which two terminals
and one printer will be connected to IOP-0 and other two CRP terminals and printer
will be connected to IOP-1. In addition to that two more operator terminals (test
positions) will be provided in MDF room.

13.2. INVERTER INPUT

Normally -48V input to inverters 1 & 2 is tapped from DCDP1 and for inverter 3
from DCDP2. However if DCDP2 is not installed, inverter 3 may also be connected
to DCDP1.

13.3. INVERTER OUTPUT SUPPLY DISTRIBUTION

The arrangement of distribution boards (DB) has been shown in Fig. 13.1 for
catering power supply to the terminals and printers from inverters. Distribution
boards DB1 & DB2 are provided in IOP room for catering two console terminals.
Distribution boards DB3 to DB6 have been provided in the wall in OMC room at a
height of about 20 cm from the floor. Similarly distribution boards DB7 and DB8
have been provided in MDF room on the wall at about 20 cm height from floor. The
output of inverter 1 is terminated on DB1, the detail of DB1 is explained in Fig.
13.1 (detail of A). All the distribution boards DB1 to DB8 are identical. DB1 is
parallel with DB4 and DB7 so that inverter 1 output is available at DB4 and DB7.
Now inverter 2 output is terminated at DB2 in IOP room and DB2 is parallel to
DB5 at OMC room and DB8 at MDF room. Similarly inverter 3 output is
terminated at DB3 in OMC room and DB3 is paralleled to DB6 in OMC room. In
such case, two DB points (ex. DB1 & DB2 etc.) coming from two inverters are put
317 C-DOT DSS MAX-XL
Chapter 13.
Invertor Arrangement