Transfer The Ups From Double Conversion Mode To Maintenance Bypass Mode; Figure 6-37: Switch Status In Online Mode; Figure 6-38: Switch Status In Maintenance Bypass Mode - Eaton 93PR Series Installation And Operation Manual

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

The operation of the internal MBS is allowed for trained personnel 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.
CAUTION
The integral MBS and Static Bypass need to supplied by the same source.
Maintenance bypass input
1. In terms of switching from "Online Mode" to "Bypass Mode", please see Section
Maintenance bypass input
"Online" mode to "Bypass" mode for the method;
2. Close the maintenance bypass switch;
Static bypass input
3. Shut down the system by the method presented in Section
4. Open the input switch to cut off the UPS rectifier input;
5. Open the output switch to cut off the UPS inverter output;
6. Open the bypass switch to cut off the UPS bypass input;
7. Open the external battery switches (including battery N-wire switch).
Maintenance bypass input
UPS in "Maintenance Bypass Mode"
Static bypass input
Maintenance bypass input
Maintenance bypass input
Maintenance bypass input
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Static bypass input
Rectifier input

Figure 6-37: Switch status in online mode

Maintenance bypass input
Rectifier input
Static bypass input
Rectifier input
Rectifier input
Static bypass input
Rectifier input

Figure 6-38: Switch status in maintenance bypass mode

Static bypass input
Static bypass input
Eaton 93PR 15-80 kW UPS
Installation and Operation Manual
Maintenance bypass switch (MBS)
Output
Output switch
Maintenance bypass switch (MBS)
Output
Maintenance bypass switch (MBS)
6.3.7 "System Shutdown";
Output switch
Output
Maintenance bypass switch (MBS)
Output switch
Maintenance bypass switch (MBS)
Output
Output
Output switch
Maintenance bypass switch (MBS)
Output switch
Maintenance bypass switch (MBS)
Output
6.3.3
Switch from
72