Powerware BPIV 15 kVA, Руководство по установке и эксплуатации

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3--4 Powerware BPIV Parallel Cabinet Installation and Operation
164201409 REV. B 101503
3.2.2
Bypass Mode
The Parallel System automatically switches to Bypass mode if it detects a UPM
overload, UPMs unavailable, load fault, or internal failure. The bypass source
supplies the commercial AC power to the load directly.
Figure 3---2 shows the path of electrical power through the Parallel System when
operating in Bypass mode.
UPM1
UPM2
UPM3
UPM4
BATT
UPM
INPUT
BATT
BATT
BATT
OUTPUT TO
CRITICAL
LOAD
PARALLEL CABINET
PATH OF ELECTRICAL POWER
CONTACTOR
BYPASS
K4
UPM SWITCH 1
UPM SWITCH 2
UPM SWITCH 3
UPM SWITCH 4
BYPASS
INPUT
FROM
BYPASS
SOURCE
BYPASS
INPUT
OPEN
CLOSED
CONTACTORS SWITCHES
Figure 3---2. Path of Current Through the Parallel System in Bypass Mode
CAUTION:
The critical load is not protected while the Parallel Cabinet is in Bypass mode.