Lenze 8200 motec frequency inverter 0.25kW-7.5kW - Manual (Page 31)

Installation
Electrical installation − Important notes
4−6
L
EDB82MV752 EN 5.2
4.2.1.7 Specification of the cables used
Power terminals
·
The cables used must comply with the approvals required for the application (e.g. UL).
·
Use low−capacitance motor cables. Capacitance per unit length:
– Core/core
£ 75 pF/m
– Core/shield
£ 150 pF/m
·
Max. permissible motor cable length without external measures:
– unshielded: 10 m
– shielded: 10 m
Control connections
·
Control cables must always be shielded to prevent interference injections.
Shielded cables
The efficiency of shielded cables is determined by
·
a good shield connection
– a contact surface as large as possible.
·
a low shield resistance:
– only use shields with tin or nickel−plated copper braid!
– shields made of steel braid are not suitable.
·
the overlap rate of the braid:
– at least 70 to 80 % with an overlap angle of 90°.