Reference Conditions And Limitations; Compressor Data - Atlas Copco GA 18 VSD+ Instruction Book

• I = 128 A + 25 % = 128 x 1.25 = 160 A
• For AWG2/0, the maximum current is 175 A, which is sufficient => use AWG2/0
• Install the prescribed maximum fuse (150 A) on each cable
• Parallel supply cable (2 x 3 phases + 2 PE - configuration (2)):
• I = (128 A + 25%)/2 = (128 x 1.25)/2 = 80 A
• For a AWG4, the maximum current is 85 A x 0.8 = 68 A, which is insufficient. For an
AWG3, the maximum current is 100 x 0.8 = 80 A. So 2 parallel cables of 3 x AWG3 + 2
x AWG8 are sufficient.
• Install 80 A fuses on each cable.
9.3

Reference conditions and limitations

Reference conditions
Air inlet pressure (absolute)
Air inlet pressure (absolute)
Air inlet temperature
Air inlet temperature
Relative humidity
Working pressure
Limitations
Maximum working pressure
Minimum working pressure
Minimum working pressure
Maximum air inlet temperature
Maximum air inlet temperature
Minimum ambient temperature
Minimum ambient temperature
9.4

Compressor data

Reference conditions
Common compressor data
Number of compression stages
110
All data specified below apply under reference conditions, see section
conditions and limitations.
bar 1
psi 14.5
˚C 20
˚F 68
% 0
See section
See section
bar(e) 4
psig 58
˚C 46
˚F 115
˚C 0
˚F 32
Instruction book
Compressor data.
Compressor data.
Reference
Unit
1
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