Mitsubishi Electronics 2033C technical manual Single Line Diagram Battery Operation

MITSUBISHI	2033C SERIES UPS	Page Number:
ELECTRIC	OWNERS / TECHNICAL MANUAL	1-7

FIGURE 1.3 Single Line Diagram - Battery Operation
			Static Transfer		Maintenance
					Bypass
			Switch		Switch
		CB3
CB		CONVERTER	INVERTER
AC input					Output
User	CB1	FI		FO	52C
supplied					52CS(7.5-20kVA)
		FB
					52MB&52L(30-50kVA)
		CB2			Power Flow
	BATTERY				Not in Use
			40kVA,	50kVA:
					UPS Module
			External Battery

The UPS is equipped with an internal rotary type Maintenance Bypass Switch (MBS) that can be used to divert utility power to the load during maintenance sessions. Figure 1.4 illustrates the power path when the MBS is in the BYPASS mode.

FIGURE 1.4 Single Line Diagram - UPS on Maintenance Bypass Operation.

CB

	Static Transfer	Maintenance
		Bypass
	Switch	Switch
CB3
CONVERTER	INVERTER

AC input

User supplied

CB1 FI

BATTERY

	Output
FO	52C
FB	52CS(7.5-20kVA)
	52MB&52L(30-50kVA)
CB2	Power Flow
	Not in Use
40kVA, 50kVA:	UPS Module
External Battery

(7.5/10/15/20kVA)

The rotary maintenance bypass switch is shown as 52CS in Figure 1.4. 52CS is a two position three point make-before-break transfer switch.

(30/40/50kVA)

Two contactors (52MB, 52L) are used instead of the 52CS. A rotary switch(SWM) is used for control of the two contactors.

MITSUBISHI ELECTRIC 2033C SERIES UPS