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 G2020 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
3.2.2

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

CB
Bypass
input
User
supplied
MCCB
CB
AC input
User
supplied
MCCB
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
contractor. (See WARNING 4 on page 5)
UPS Module
CONVERTER
/ CHARGER
CB1
Battery Cabinet
External
BATTERY
52S
CB3
Static Transfer
Switch
INVERTER
52C
CB2
G2020 Series UPS Installation and Operation Manual – 94861-004
Output
Power Flow
Not in Use