MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
1-10
B) Bypass
Operation:
Load Power supplied through UPS internal static bypass line.
Figure 1.2
Single Line Diagram - Bypass Operation: Load fed through static bypass line
Referring to Figure 1.2: The Internal Bypass line is a Hard-wired line through 52S which
supplies the critical load with unconditioned bypass input power. Upon switching to the Internal
Bypass line, the Static Transfer Switch line through CB3 (herein after STS contactor CB3)
supplies the power immediately, and then the Internal Bypass line through 52S supplies the
power. In the event of a switching to the Bypass line, the power to the critical load will be
uninterrupted. The purpose of this Internal Bypass line is to route power to the critical load while
the UPS module is de-energized (converter and inverter), and during Start-up before the system
is fully operational.
Each UPS internal static bypass line will equally share the power supplied to the critical load in
the Parallel Operation if a cable length of bypass line is equal each other. For a MMS unable to
equalize the cable length, additional rectors should be installed to compensate the difference in
cable impedance.
Bypass Module
CB3
CONVERTER / INVERTER
CHARGER
52C
Static Transfer
Switch
52S
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module
AC
input
Bypass
Input
CB
User
supplied
MCCB
User
supplied
MCCB
CB
Power Flow
Not in Use
Output
Battery
Cabinet
External
BATTERY
CB
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module
UPS
CABINET
~
~ ~
~
3
~
6 UPS
Modules
Содержание 9900C Series
Страница 2: ...Preface Revision A 04 04 2017 4GBA0114 ...
Страница 61: ......