Eaton Powerware 9390 IAC-B, Инструкция по установке и эксплуатации

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4-1
EATON Powerware
®
9390 IAC-B and IAC-T Installation and Operation Manual
S
164201590 Rev C powerware.com
Chapter 4 Understanding IAC Operation
The Integrated Accessory Cabinet (IAC) can be configured for maintenance bypass, parallel
redundant, or parallel redundant with maintenance bypass operation.
4.1 Maintenance Bypass Configuration
4.1.1 UPS Mode
When the maintenance bypass switch (MBP) is open and the maintenance isolation switch
(MIS) is closed, conditioned and protected power from the UPS is routed through the MIS
to the critical load.
If the optional bypass input breaker (BIB) is installed, power is supplied to the UPS through
the BIB, and the UPS rectifier and bypass input terminals are jumpered together. If the
optional BIB and rectifier input breaker (RIB) are installed, the UPS rectifier is supplied
power through the RIB and the UPS bypass is supplied power through the BIB, for a dual
feed system. In a single feed system, the BIB and RIB input terminals are jumpered together
and power is supplied to the UPS rectifier and bypass input terminals from a single source.
Figure 4-1 shows the path of electrical power through the IAC when operating in UPS
mode.
AC INPUT TO
UPS FROM
UTILITY
OUTPUT TO
CRITICAL LOAD
IAC
RIB
(OPTIONAL)
BIB
(OPTIONAL)
MIS
MBP
AC INPUT TO
BYPASS FROM
UTILITY
TO UPS RECTIFIER
INPUT
FROM UPS OUTPUT
TO UPS BYPASS
INPUT
MAIN POWER FLOW IN UPS MODE
MAIN POWER FLOW IN MAINTENANCE BYPASS MODE
Figure 4-1. Path of Current Through the IAC in UPS Mode