Turning Ups From Mechanical Bypass To Double Conversion Mode; Figure 6-8: Mechanical Bypass Mode; Figure 6-9: Double Conversion Mode - Eaton 93PM User And Installation Manual

6.9 Turning UPS from mechanical bypass to double
conversion mode
To turn the UPS back to double conversion mode:
1. The normal start position should be the following:

Figure 6-8: Mechanical bypass mode

2. Turn ON rectifier switch to connect rectifier input to UPS.
3. Turn ON Static bypass switch to connect bypass input to UPS:
4.
Perform the UPS start-up procedure (bypass mode) in Chapter 6.4.2 Starting the UPS system in
Bypass mode on page 64.
5. Turn MBS from bypass position to UPS position to connect UPS output to load.
6.
Perform transfer from bypass to double conversion mode as described in Chapter 6.4.4
Transfer from Bypass to Double conversion mode on page 65.
The UPS is now in double conversion mode:

Figure 6-9: Double conversion mode

P-164000249
Revision 2
Maintenance Bypass
Switch (MBS)
30-200 kW
User's and Installation Guide
71