Important notes
Specification of cables used
6
Basic unit wiring
6.2
6.2.7
L
6.2-5
EDS82EV903-1.0-11/2002
6.2.7 Specification of cables used
l The cables used must comply with the approvals required for the
application (e.g. UL).
l Use low-capacitance motor cables:
8200 vector power range Capacitance per unit length
Core/core Core/shield
0.25 ... 2.2 kW up to 1.5 mm
2
≤ 75 pF/m
3 ... 11 kW from 2.5 mm
2
≤ 100 pF/m
≤ 150 pF
m
15 ... 30 kW ≤ 140 pF/m ≤ 230 pF/m
45 ... 55 kW ≤ 190 pF/m ≤ 320 pF/m
75 ... 90 kW ≤ 250 pF/m ≤ 410 pF/m
l Max. permissible motor cable length without additional measures (if you
have to comply with EMC regulations, the permissible cable lengths can
change):
– shielded: 50 m
– unshielded: 100 m
l Control cables must always be shielded to avoid interference.
The efficiency of shielded cables is determined by
l a good shield connection
– a contact surface as large as possible
l a low resistance:
– Only use shields with tin-plated or nickel-plated copper braids!
– Shields of steel braid are not suitable.
l For the overlapping degree of the shield braid:
– Min. 70 to 80 % with overlap angle of 90°.
Power connections
Control connections
Shielded cables
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