Figure 6-6: The Normal Positions Of The Mbs Switches And Rectifier Disconnect Switch (Must Be Located In The Site Wiring); Figure 6-7: Mechanical Bypass Mode - Eaton 93PM User And Installation Manual

NOTE
The integral MBS and Static Bypass need to supplied by the same source.
To turn the UPS to mechanical bypass switch:
1. The normal start position should be following:
Figure 6-6: The normal positions of the MBS switches and rectifier disconnect switch
(must be located in the site wiring)
2.
Perform transfer from double conversion mode to bypass mode as described in Chapter 6.4.3
Transfer from Double conversion mode to Bypass mode on page 64. Remember to verify
the transfer before proceeding to the next step.
3. Turn the MBS from UPS position to Bypass position.
4.
Perform the LOAD OFF procedure in Chapter 6.4.7 UPS system and critical load shutdown on
page 66.
5. Turn OFF the rectifier switch to disconnect UPS rectifier input.
6. Turn OFF the Static bypass switch to disconnect UPS bypass input.
UPS is now in the mechanical bypass mode:

Figure 6-7: Mechanical bypass mode

70
Maintenance Bypass
Switch (MBS)
30-200 kW
User's and Installation Guide
P-164000249
Revision 2