Version 1 Wall-Mounted Bypass Switch Installation - Eaton 9355 User Manual

Chapter 5

Version 1 Wall-Mounted Bypass Switch Installation

This chapter describes installing the wall-mounted bypass switch with the UPS. The wall-mounted bypass
switch is a Make-Before-Break (MBB) maintenance bypass switch.
Note:
The Eaton 9355 UPS has the following power connections:
3–phase (L1, L2, and L3), neutral, and ground connection for rectifier/bypass input
l
3–phase (L1, L2, and L3), neutral, and ground connection for load output
l
The nominal input/output voltages are:
120/208 or 127/220 Vac
l
Output overcurrent protection and disconnect switch must be provided by others.
Figure 26 and Figure 27 beginning on page 29 show the oneline diagrams.
Only qualified service personnel (such as a licensed electrician) should perform the UPS installation.
Initial startup must be performed by an authorized Eaton Customer Service Engineer. Risk of electrical
shock.
To hardwire the bypass cabinet:
1. Verify that the electrical connections to the installation site have been properly installed.
2. A wall-mounted, user–supplied, readily–accessible disconnection device must be incorporated in the input
wiring.
Compare the circuit breaker ratings to the ones in Table 2 on page 26.
3. Switch off utility power to the distribution point where the bypass cabinet and UPS will be connected. Be
absolutely sure there is no power.
4. Determine your equipment's grounding requirements according to your local electrical code.
5. Remove the bypass cabinet front cover (see Figure 18).
Figure 18. Version 1 Bypass Cabinet Front Cover
The input isolation transformer cannot be used with the wall-mounted bypass switch.
Eaton 9355 UPS (10/15kVA) User's Guide 164201594—Rev G
WARNING
www.eaton.com/powerquality 23