Mitsubishi 2033D SERIES technical manual Internal Static Bypass Line

MITSUBISHI	2033D SERIES UPS	Page Number:
ELECTRIC	OWNERS / TECHNICAL MANUAL	1-6

B) Internal Static Bypass Line

FIGURE 1.2 Single Line Diagram- Bypass Operation. Load fed through static bypass line.

CB

AC Bypass

Input

CB

AC input

User supplied

		Static Transfer		Maintenance
				Bypass
		Switch
				Switch
	52RS
	CONVERTER	INVERTER
				Output
52RC	FI	FO	52C	52CS
		FB
		72B		Power Flow
				Not in Use
	BATTERY	50kVA,	80kVA:
				UPS Module
		External Battery

Referring to Figure 1.2, the Internal Static Bypass line is a Hard wired line through Static Transfer Switch which supplies the critical load with unconditioned input power. The purpose of this line is to route power to the critical load while the UPS module is de-energized during Start-up before the system is fully operational.

The internal control system determines the operation of the two paths, with the load powered from the inverter being the normal operation.

MITSUBISHI ELECTRIC 2033D SERIES UPS