MITSUBISHI ELECTRIC 1100B SERIES UPS
1100B SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
1-12
B) Bypass Operation:
Load power supplied through UPS internal static bypass line.
Figure 2
Single Line Diagram - Bypass Operation: Load Fed Through Static Bypass Line
Referring to Figure 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 (STS) line through CB3 supplies the power immediately. 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 (converter and inverter) is de-energized,
and during startup before the system is operating on the UPS module.
In the event of a load overcurrent, the UPS transfers to bypass without interruption to the critical
load.
The internal control system determines the operation of the two paths, with the load powered
from the inverter being the normal operation.
UPS Module
Power Flow
AC
input
CB
3
CONVERTER
/
CHARGER
Output
52
C
Static Transfer
Switch
52S
72B
MCCB
User
supplied
CB
52RC
INVERTER
Not in Use
BATTERY
External Battery
Bypass
input
MCCB
User
supplied
CB
Summary of Contents for 1100B Series
Page 2: ...Preface ...
Page 64: ......
