Atlas Copco SF 15+ Instruction Book page 100

Compressor type
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SFD 22
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SFD 22
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SFD 22
+
SFD 22
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SFD 22
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SFD 22
I (1): maximum current in the supply lines at maximum load and nominal voltage for
tot
compressors without integrated dryer.
Max fuse (1): maximum fuse size in case of compressors without integrated dryer.
I (2): maximum current in the supply lines at maximum load and nominal voltage for
tot
compressors with integrated dryer.
Max fuse (2): maximum fuse size in case of compressors with integrated dryer.
IEC fuses: class gL/gG
UL fuses: class K5; CSA: HRC form II
Possible configurations
There are 3 possible cabling layouts:
• (1): Single supply cables (for DOL variants, only K21 is used)
• (2): Parallel supply cables (for DOL variants, only K21 is used)
• (3) is only valid for Y-D versions
Cable sizing according IEC
The tables below indicate the current carrying capacities of cables for 3 commonly used
installation methods, calculated according to standard 60364-5-52 - electrical installations of
buildings part 5 - selection and erection equipment and section 52 - current carrying capacities in
wiring systems.
The allowed currents are valid for PVC insulated cables with three loaded copper conductors
(maximum conductor temperature 70 °C).
98
IEC 60 Hz 380 V
IEC 50 Hz 400 V
UL/cUL 60 Hz 200 V
UL/cUL 60 Hz 230 V
UL/cUL 60 Hz 460 V
UL/cUL 60 Hz 575 V
Instruction book
I (1) Max Q21/Q2
tot
fuse (1) 2
27 A 32 A 14.5 A
25 A 25 A 12.8 A
51 A 60 A 21.9 A
44 A 50 A 19.0 A
22 A 25 A 9.5 A
18 A 20 A 7.6 A
2920 7140 52