Vertiv Liebert APM 300, Руководство пользователя

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Chapter 7 Parallel System And Dual Bus System 55
APM 300 Integrated UPS Single Module And Parallel System User Manual
UPS1
J10:3
J10:4
UPS2
J10:3
J10:4
J10:3
J10:4
UPS1
Bypass module
Bypass module
Bypass module
UPS1
J10:3
J10:4 Bypass module
UPS2
J10:3
J10:4
Bypass module
UPS1
J10:3
J10:4
Bypass module
Figure 7-4 EPO circuit diagram
7.3 Operation Procedures For Parallel System
Warning
If UPS input uses RCD, differential switch is only used in the system's bypass mains supply. At the moment of electrical
connection, current may not be immediately separated, which may result in the tripping of RCCB respectively.
Only one step is needed for once, and only after finishing this operation step of each UPS module, the next
step can be carried on.
7.3.1 Startup Procedures In Normal Mode
These procedures are applicable to start the UPS under total power-down state, which means the UPS or the
maintenance bypass switch has not supplied the load before. Make sure UPS has been completely installed and
commissioned by the engineer, and external power supply switch has been turned off.
Warning
1. These procedures result in mains voltage being applied to the UPS output terminals.
2. If any load equipment is connected to the UPS output terminals, check with the user that it is safe to apply power. If
the load is not ready to receive power, disconnect the downstream load switch, and stick a warning label on the
connection point of the load.
For the detailed operation procedures, see 5.2.1 Start-Up Procedures .