Emerson U /400/S/6P, U/300/S/12P, U /400/S/12P, U/300/S/6P, 400KVA, 200 Power Cables, Control Cables

56 Chapter 7 “1+N” System

7.4.3 Power Cables

The wiring of power cables is similar to that of single module system. Refer to 3.1 Power Cabling.

The bypass and the main input sources must be referenced to the same neutral potential and input earth leakage monitoring devices, if installed, must be located upstream of the common neutral sinking point.

7.4.4 Control Cables

Control cable connection of dual bus system consisting of two single units

If the dual bus system consists of two single units, use the optional 9-core LBS cable to connect between the LBS interfaces (X4 socket on parallel board) of the two single units, and use another optional LBS cable to connect between any two 25-core interfaces (X2-1 or X2-2) of the two single units, as shown in Figure 7-4.

Warning

Although the dedicated 25-core LBS cable looks like the parallel cable, it is absolutely not the parallel cable, and cannot be replaced by it. Otherwise, UPS system chaos may occur.

		04116319	20m	DB9-DB9
Parallel board		04115338	10m	DB9-DB9	Parallel board
		04115339	15m	DB9-DB9
X4		LBS cable			X4
X2-1	X2-2				X2-1	X2-2
		LBS cable
		04116100 15m DB25-DB25
X1-1	X1-2				X1-1	X1-2

UPS unit 1 UPS unit 2

Figure 7-4 Control cable connection of dual bus system consisting of two single units

Control cable connection of dual bus system consisting of a single unit and a parallel system

Figure 7-5 shows the control cable connection of the dual bus system consisting of a single unit and a parallel system composed of two or more single units. Use the optional 9-core LBS cable to connect from the LBS interface (X4 socket on parallel board) of the single unit to the LBS interface of any single unit in the parallel system; and use another optional LBS cable to connect from any 25-core interface (X2-1 or X2-2) of the single unit to the LBS interface of any single unit except for the aforesaid one in the parallel system, note that this LBS cable has a 9-core end and a 25-core end, respectively connecting the X4 interface of the parallel system and the 25-core interface of the single unit.

HIPULSE U UPS Single Module And “1+N” (Expandable) 160/200/300/400kVA User Manual