Atlas Copco DZS 300P

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Instruction Book

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< 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: Itot = 128 A, maximum ambient temperature is 45 °C, recommended fuse = 150

 Single supply cables (3 phases + 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 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.

Atlas Copco DZS 300P - Page 51