2.11.1 Three-phase power supply
The machine requires a symmetrical three-phase power supply.
In a symmetrical three-phase supply the phase angles and voltages are all the same.
This machine may only be supplied from an earthed TN or TT three-phase supply in which the neutral
point is earthed.
Connection to an IT supply is not permitted without taking further measures (earth leak detection,
etc.).
Further information When connecting to a European 400 V/3/50 Hz power supply the requirements in chapter 2.12 are
also to be observed.
See electrical diagram in 13.3.
2.11.1.1 Power supply specifications
The following supply cable conductor cross sections (copper multi-core) and fusing (slow-blow
class gL) are selected according to German
DIN VDE 0100-430 (IEC 60364–4–43 and IEC 60364–4–473)) and DIN VDE 0298–4 standards for
30 °C ambient temperature and wiring type C.
➤ For other application conditions, check conductor diameters and change accordingly.
➤ Cables laid side-by-side must be separated by a distance equal to one cable diameter.
Other conditions would include, for example:
■ Higher temperature
■ Other cable installation method
■ Cable length >50 m
■ Bundled cables
Mains frequency: 50 Hz
Rated voltage: 230V±10%/3/50Hz
Direct online starting
Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm
2
]
Backup fuse
[A]
Supply cable
[mm
2
]
150-2-G
4.7
●
10
4 x 1.5
–
–
230-2-G
6.9
●
10
4 x 1.5
10
4 x 1.5
420-2-G
11.8
●
25
4 x 4
16
4 x 2.5
550-2-G
17.3
○
35
4 x 6
20
4 x 2.5
750-2-G
21.0
○
50
4 x 10
25
4 x 4
1000-2-G
29.4
○
63
4 x 16
35
4 x 6
● Pressure switch
○ Controller (star-delta)
Tab. 16 Supply details 230V/3/50Hz
2
Technical Specification
2.11 Power Supply
8
Assembly and operating manual 2-stage piston compressor
EPC-2-G
No.: 9_5753_04 E
