Toshiba G9000 operation manual CB3 Mccb

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

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.

Bypass	CB		52S
Input	User supplied
		CB3
	MCCB		Static Transfer
			Switch
		CONVERTER	INVERTER
AC	CB		CB
			Output
Input
	User supplied	CB1	52C
	MCCB
		CHARGER
	CB2
External	Battery		Power Flow
		UPS Module
Battery	Cabinet		Not in Use

Figure 1.2 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 Installation and Operation Manual 9