APC 6000 installation manual Power circuit wiring diagrams, Connection via the top, Special case

Installation (cont.)

◗on the floor under the cubicles, in the free space equal to the height of the feet. In this case the cables should be run side by side to avoid blocking the flow of air for ventilation. The cables exit from the rear or sides of the cubicles;

◗connection via the top

◗the Static Switch, filter and auxiliary cubicles are designed for connection via the bottom or top,

◗for the rectifier-inverter cubicles, a special 400 mm wide connection duct must be added to the right of the cubicle to allow connection via the top.

Layout for an installation with two parallel UPSs and a centralised SSC

rear	battery		auxiliaries	rect./inv.
			cubicle1
	cubicle(s) 2		(if applicable)	cubicle 1
	auxiliaries	rect./inv.	battery	static switch
front	cubicle 2	cubicle 2	cubicle(s) 1	cubicle
	(if applicable)

Fig. 8

Power circuit wiring diagrams

The single-wire diagrams for typical UPS installations are given in figures 9 to 15. The heavy lines represent the cables that must be connected

(see the table in the previous chapter for the required cross-sectional areas of the cables).

Note:

◗for frequency converters, the input and output frequencies may be different (50 or 60Hz);

◗for frequency converters without batteries, ignore the battery cubicles and the + and - cables shown in the diagram.

Special case:

The UPSs can be optionally supplied with the neutral conductor not interrupted by switches Q4S, Q3BP and Q5N.

Diagram for a single-unit or single modular UPS with separate Mains 1 and 2

	rectifier-inverter cubicle
								Q3BP
mains 2		Q4S		static						earth
				switch
mains 1	Q1	rectifier	inverter					Q5N	load
		charger
						frames interconnections for earthing
	battery cubicle		QF1	+	-	+	-	other battery
earth	beside the							cubicles (if		earth
	rectifier-inverter cubicle							applicable)

Fig. 9

Diagram for a single-unit or single modular UPS with common Mains 1 and 2

		rectifier-inverter cubicle
									Q3BP
mains	mains 2										earth
	input		Q4S		static
					switch
mains 1		Q1	rectifier	inverter					Q5N	load
			charger
input
							frames interconnections for earthing
		battery cubicle		QF1	+	-	+	-	other battery
earth		beside the							cubicles (if		earth
		rectifier-inverter cubicle							applicable)

Fig. 10

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