Quincy Compressor QGS 90, Инструкция

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• For supply cables up to AWG8: same size as the supply cables
• For supply cables larger than AWG8: use maximum allowed ampacity of the selected
supply cables and compare with value in table below (see CEC Part 1 table 17)
< 100 A: use AWG8
< 200 A: use AWG6
< 300 A: use AWG4
Always check the voltage drop over the cable (less than 5 % of the nominal voltage is
recommended).
Example of supply cable calculation: I
tot
= 128 A, maximum ambient temperature is 45 °C,
recommended fuse = 150 A
• Single supply cables (3 1 PE - configuration (1)):
• 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 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.
• Recommended fuse values are based on full service factor and 10% under- and
over-voltage.
• Caution:
Always double check the fuse size against the calculated cable size. If required,
increase the cable size.
9.2 Reference conditions and limitations
Reference conditions
Air inlet pressure (absolute) bar 1
Air inlet pressure (absolute) psi 14.5
Air inlet temperature ˚C 20
Air inlet temperature ˚F 68
Relative humidity % 0
Limits
Maximum working pressure See section Compressor data
Minimum working pressure bar(e) 4
Minimum working pressure psig 58
Maximum air inlet temperature ˚C 46
Instruction book
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