16
the slave UPS works at “0” load status.Once the master UPS is failed,the master
will transfer to bypass and then the slave UPS provides the power.
See Figure 2.11
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Ｍａｓｔｅｒ ＵＰＳ
ＡＣ ｉｎｐｕｔ
ＲＥＣ
ＩＮＶ
Ｂｙｐａｓｓ
Ｂｙｐａｓｓ
ＲＥＣ
ＩＮＶ
Figure2.11
Master UPS abnormal work flow
2.9
Inspection of installation
2.9.1
Inspection of UPS
After UPS installation,plz do the necessnary inspections below
：
Whether the UPS trucke brake fixed or steady or skew.
Whether the UPS scraped or hit damage.
Whether there is sundries around the UPS body or around it.
2.9.2
Electric inspection
After UPS switching finished
，
plz inspect following items:
The input and output switching is ok and the in and out terminals are canonical
Make sure the input and ouput connected cable steady
，
phase series correct and
mark complete.
Make sure battery cable connection fastened,polarity normal and battery setted
steady.
Make sure the cable laying of system cononical , neat and easy for future
inspection and extendable.
3
ON/OFF OPERATION
3.1
Preparation before switching on the UPS
Reconfirm the all connection and power supply are right.
Inspect the input voltage and frequenct are within the range.
