Chapter 4 Parallel Installation

The Powerware 9155 has the following power connections:

S2-phase (L1 and L2), neutral, and ground connection for rectifier/bypass input

S2-phase (L1 and L2), neutral, and ground connection for load output The nominal input/output voltages are:

S100/200, 110/220, or 120/240 Vac with 180° phase displacement

S120/208 or 127/220 Vac with 120° phase displacement

Output overcurrent protection and disconnect switch must be provided by others.

Figure 14 on page 22 shows a oneline diagram of the parallel UPS system.

EATON Powerware® 9155 Parallel UPS (8–15 kVA) User’s Guide S 164201592 Rev C www.powerware.com

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