Cable size and main fuses
Overview of fuse types
Electrical approval Fuse type
IEC aR
CSA/UL class RK5
1
1
Class RK5 according UL248-9
Electrical approval
SSCCR
1
IEC gG/gL type 2
2
CSA HRC form II
1
SSCCR = Standard Short Circuit Current Rating
2
gG/gL type 2 according to IEC609471-4-1, IEC60269, DIN43620, VDE0636
3
Class RK5 according UL248-9
Maximum fuse size
•
The pre-described fuses mentioned in the Technical Data Sheet (TDS) or on the service
diagram are the maximum main fuses to protect the installed compressor electrical panel.
• The pre-described fuse types are to be used.
• Final cable and fuse selection will depend on the customer’s installation and local legislation.
• Installing smaller fuses of the same type/class might lead to smaller main feeder cables.
• Always double-check the fuse size versus the calculated cable size. If required, reduce the
fuse size or enlarge the cable size.
• Cable length should not exceed the maximum length according to IEC 60204 (table 10).
• Obey local regulations if they are stricter than the examples mentioned in this document.
Package current
The Package current mentioned on the technical data sheet is defined as follows:
• Package current is the current the compressor uses:
• At reference conditions
• At 100 % load
• At maximum pressure
• At nominal voltage
• Before service interval (so including fouled filters, etc…)
The pre-described fuses on the technical data sheet are the maximum main fuses to protect the
installed compressor electrical panel.
Instruction book
64 9829 3178 63
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