Vertiv™ | Liebert® SRC-G | User Manual 34
Electrical Installation
Chapter 3: Electrical Installation
In this chapter, the electrical installation of Vertiv™ Liebert® SRC-G unit is explained in-depth to help users with
the various activities, which include work introduction and installation notes, connecting power cables of the
indoor and outdoor units, connecting the control cables, and the installation inspection.
• Liebert SRC-G is a range of sophisticated units used in industrial, commercial, or other professional
ecosystem. It is not tailored for the general public. The total rating power is larger than 1 kW and is in
accordance with the IEC61000-3-12 standards. Hence, the short-circuit ratio between the user’s power
supply and the power grid needs to be greater than or equal to 250 interfaces.
• The user needs to obtain permission from the utility power department to ensure that the unit connection
to the power supply with the short-circuit ratio is greater than or equal to 250.
3.1. Task Introduction
3.1.1. Cables to Connect On-site
Table 3-1 tabulates the various copper cables recommended for cabling of indoor and outdoor units with control
panel. Table 3-2 provides a list of the copper cables to be arranged by customer.
Table 3-1 Recommended cables for dierent models
Name of Items SRC03GES SRC07GES SRC07GET SRC11GET
Gas (Suction) pipe
pipe 1/2” with
insulation
5/8” with
insulation
5/8” with
insulation
7/8” with
insulation
Liquid (Discharge) pipe
3/8” with
insulation
3/8” with
insulation
3/8” with
insulation
3/8” with
insulation
Indoor power cable 3C x 1.5 mm
2
3C x 1.5 mm
2
3C x 1.5 mm
2
3C x 1.5 mm
2
Fan control cable 3C x 0.5 mm
2
4C x 0.5 mm
2
4C x 0.5 mm
2
5C x 0.5 mm
2
Outdoor power cable* 2C x 2.5 mm
2
2C x 2.5 mm
2
4C x 2.5 mm
2
4C x 2.5 mm
2
Fan and contactor 4C x 0.5mm2
Outdoor HP & LP cable 3C x 0.5mm2
Outdoor pressure sensor cable 3C x 0.5mm2
All field cables are recommended as armored cables to avoid external influence such as rat bite etc.
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