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.
!
NOTE

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

Bypass
Input
AC
Input
External
Battery
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.
10
The Bypass Input breaker and cables are to be supplied and installed by the user or the
constructor. (See WARNING 4 on page 6)
CB
User supplied
MCCB
CONVERTER
CB
User supplied
CB1
MCCB
CB2
Battery
UPS Module
Cabinet
G9000 Series UPS 300-750kVA Installation and Operation Manual – 61480-017
CB3
Static Transfer
Switch
INVERTER
CHARGER
52S
CB
Output
52C
Power Flow
Not in Use