Eaton 93PR Series, User And Installation Manual

Page: 82 / 98

25-75 kW
User's and Installation Guide 73
6.9 Transfer UPS from Maintenance Bypass to double Conversion Mode
To transfer the UPS back to double Conversion Mode:
1.The normal start position should be the following:
Figure 6-11: Maintenance Bypass Mode
2. Turn on the rectifier input switch, bypass input switch and the N line switch, Make sure the output switch
is still off.
3. Refer the chapter 6.4.2 to start the UPS in Bypass Mode.
4. Turn on the output switch and then turn off MBS. Lock the protective cover plate in front of the MBS.
5. Refer the chapter 6.4.4 to transfer the Maintenance Bypass Mode to Normal Mode.
The UPS is now in Double Conversion Mode:
Figure 6-12: double Conversion Mode
Maintenance
bypass input
Static
bypass input
Rectifier input
Bypass switch
Input switch Output switch
Maintenance bypass switch (MBS)
Maintenance
bypass input
Static
bypass input
Rectifier input
Bypass switch
Input switch Output switch
Maintenance bypass switch (MBS)