Eaton 93E Operation Manual page 26

UPS Installation Plan and Unpacking
• Parallel UPS input wiring size requirements and output wiring size requirements from the UPSs to the Tie
Cabinet are the sames as those for single systems.
• This device is not equipped with its own mains separation device. It is , therefore, essential that the customer
install such a device at the installation site near the UPS.
• Install a proper three-pole overcurrent disconnect device or four-pole overcurrent disconnect device before
connecting to the UPS, the disconnect device shall disconnect simultaneously all line conductors of the AC
MAINS SUPPLY.
• The UPS requires an input neutral connection. Ensure that an input neutral is connected prior to energising
the UPS. If a 4 pole Automatic Transfer Switch is installed upstream of the UPS it must work with a break
before make transition with a minimum transfer time of 50ms.
Figure 4-6 and Figure 4-7 show the location of the UPS power cable terminals.
3-6 Eaton 93E UPS (300/400 kVA, 380/400/415V) Installation and Operation Manual