Emerson 30-200kVA, 50 and 60 Hz, 400V user manual Isolation Transformer Option

External Optional Cabinets

EXT-MaintX3-1&2on UPS Parallel Board M3 (leave open if no external bypass switch is used). Pro- vides external maintenance bypass interlock protection for the UPS. Short circuit means external bypass closed.

EXT-Out(X3-3&4)on UPS Parallel Board (leave shorted if no external output switch is used). Pro- vides external output interlock protection for paralleled UPS modules. Short circuit means external output switch closed.

4.3Isolation Transformer Option

Isolation transformers are required in cases requiring galvanic isolation between the input supply mains and the UPS.

These options are housed in cabinets and they are available for every range of UPS. These optional cabinets provide the Top Cable entry function.

NOTE

Terminals and cabling for the battery connection is not a part of the MBP or TC cabinet.

Figure 36 Equipment arrangement—UPS, battery cabinet and top-entry Isolation Transformer Cabinet

TCE
TX	UPS	BATTERY
		cabinet
	FRONT

Figure 37 Single input external isolation transformer cabinet

Isolation Transformer Cabinets

QF1

3P T1

Bypass

Supply

N	Q3
	Q2
Q1	Q5	To Load

	Input Mains Supply
Supplied by		X3
Others	UPS

CB X1

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