Vertiv
™
| Liebert® XDC | User Manual
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3 Electrical Installation
This chapter introduces the electrical installation of Vertiv™ Liebert® XDC unit, including brief introduction of key
components, installation notes, cabling and electrical inspection for the unit.
Note: Liebert XDC unit is a professional equipment, used in industrial, commercial or other professional environment, and
is not sold to the general public.
Note: Its total rated power is greater than 1 kW and complies to the IEC61000-3-12 standard. It is necessary to provide an
interface between the user’s power supply and the grid with a short-circuit ratio greater than or equal to 350.
Note: The user needs to obtain permission from the local power supply department to ensure that the air conditioner is
connected to the power supply with short-circuit ratio greater than or equal to 350.
3.1. Installation Tasks and Cautions
3.1.1. Cabling Connection at the Site
1. Liebert XDC unit power cables and control cables.
2. Outdoor unit (air-cooled): control signal cable and power cable.
3. Unit input and output control cables.
3.1.2. Installation Notes
1. The connection of all power cables, control cables, and ground cables must comply with the national and local electrician
regulations.
2. For full load current, refer to the unit’s nameplate. The cable size should comply with local cabling/wiring regulations.
3. Main power supply requirement: 380 V to 415 V (-10% to +6%)V, 50 Hz, 3 N~.
4. The power supply cord adopts Y-type connection. If the power supply cord is damaged, it must be replaced by
professional maintenance personnel.
5. The electrical installation and maintenance must be performed by authorized and trained professionals.
6. Before connecting the circuit, use a voltmeter to measure the input power voltage, and ensure the power supply is off.
7. The unit needs to be fixed firmly with screws, guide rails or other methods during installation to avoid shaking during
startup or operation.
8. The emergency power supply off and emergency stop requirements of the air conditioner should be considered in the
power distribution system, and a suitable all-pole disconnection device for disconnection of the power supply should be
provided.
9. Appropriate RCD should be installed according to the actual installation situation.
10. Without the confirmation of Vertiv technical personnel, the user cannot install electrical devices, such as electric meters,
in the unit.
