Lenze i700 Manual - Manual (Page 94)

Electrical installation
Installation according to EMC (installation of a CE−typical drive system)
Motor cable
6
l
94 EDS700ACBA EN 4.0
6.3.3 Motor cable
ƒ Only use shielded motor cables with braids made of tinned or nickel−plated copper.
Shields made of steel braids are not suitable.
– The overlap rate of the braid must be at least 70 % with an overlap angle of 90 °.
ƒ The cables used must correspond to the requirements at the location (e.g.
EN 60204−1).
ƒ Connect the shield with a large surface and fix it with metal cable binders or a
conductive clamp.
ƒ Connect the shield directly to the corresponding device shield sheet.
– If required, additionally connect the shield to the conductive and earthed
mounting plate in the control cabinet.
ƒ The motor cable is optimally installed if
– it is separated from mains cables and control cables,
– it only crosses mains cables and control cables at right angles,
– it is not interrupted.
ƒ If the motor cable must be opened all the same (e.g. due to chokes, contactors, or
terminals):
– The unshielded cable ends may not be longer than 100 mm (depending on the
cable cross−section).
– Install chokes, contactors, terminals etc. spatially separated from other
components (with a min. distance of 100 mm).
– Install the shield of the motor cable directly before and behind the point of
separation to the mounting plate with a large surface.
ƒ Connect the shield with a large surface to PE in the terminal box of the motor at the
motor housing.
– Metal EMC cable glands at the motor terminal box ensure a large surface
connection of the shield with the motor housing.
Motor supply cable Cable gland
Motor supply cable
max. 500mm
Large-surface
contact of
cable shield
Braid
Heat-shrinkable tube
Cable gland acc. to EMC with
high degree of protection
Cable gland
8200EMV023 8200EMV024
Fig. 6−2 Shielding of the motor cable