Transfer The Ups From Double Conversion Mode To Maintenance Bypass Mode; Figure 6-8: Double Conversion Mode - Eaton 93PR User And Installation Manual

6.7. Transfer the UPS from Double Conversion Mode to Maintenance Bypass Mode

The operation of the internal MBS is allowed for a trained person only who is familiar with the UPS behavior and
functions. The full UPS wiring diagram with a MBS switch is presented in the installation instructions.
The integral MBS and Static Bypass need to supplied by the same source.
Transfer the UPS to Maintenance Bypass Mode:
1. The normal start position should be following:
Maintenance
bypass input
Static
bypass input
Rectifier input
66
NOTE
Bypass switch
Input switch
UPM cabinet IO cabinet
Front view

Figure 6-8: Double Conversion Mode

Eaton 93PR 500 kW UPS
User's and Installation Guide
Maintenance bypass switch (MBS)
Output switch
Input switch (closed)
Vertical position
switch (closed)
Bypass
Vertical position
MBS switch (open)
Horizontal position
switch (closed)
Output
Vertical position
Output