Lenze 8400 - Manual (Page 169)

Electrical installation
Installation according to EMC (installation of a CE-typical drive system)
Motor cable
6
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169 EDS84ASC552 EN 9.1
6.2.3 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 Shield the cable for motor temperature monitoring (PTC or thermal contact) and
install it separately from the motor cable.
– In Lenze system cables, the cable for brake control is integrated into the motor
cable. If this cable is not required for brake control, it can also be used to connect
the motor temperature monitoring up to a length of 50 m.
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. 6-3 Shielding of the motor cable