Bypass Operation: Load Power Supplied Through Ups Internal Static Bypass Line; Figure 3-2 Single Line Diagram - Bypass Operation: Load Fed Through Static Bypass Line - Toshiba G9000 SERIES Installation And Operation Manual

In the event of a UPS module failure during Parallel Operation, the critical load power will be continually
supplied and shared by all other UPS.
!
The Bypass Input breaker and cables are to be supplied and installed by the user or the
constructor. (See WARNING 4 on page 5)
NOTE
3.2.2

Bypass Operation: Load Power supplied through UPS internal static bypass line.

CB
Bypass
input
User
supplied
CB
AC input
User
supplied
Figure 3-2 Single Line Diagram – Bypass Operation: Load fed through static bypass line
Figure 3-2 shows 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 whenever the
system is in the Parallel Operation.
G9000 Enhanced Series UPS Installation and Operation Manual – 93823-004
UPS Module
CONVERTER
/ CHARGER
CB1
Battery Cabinet
CB2
External
BATTERY
52S
CB3
Static Transfer
Switch
INVERTER
52C
Power Flow
Not in Use
Output
9