Shanghai STEP Electric Corporation
Appendix A EMC Installation Guide
Fig A9.1 Electric Installation of elevator integrated drive controller In order to meet the EMC
directive, the following notices must be taken:
(1) Elevator integrated drive controller shall be installed in a cabinet where the base plates of
elevator integrated drive controller and such peripherals as input filter will be secured on the rear
panel in order to ensure good electric contact; the elevator integrated drive controller and filters
must be arranged as close as possible within 15cm in order to minimize the high-frequency
impedance of their grounding line and reduces high-frequency noises.
(2) Install a wide ground terminal bank at the inlet (5cm or less from outlet) of control cabinet
and than secure all the shielding layers of cabinet in/out cables onto the terminal bank by 360°
girth jointing method in order to ensure good electric contact.
(3) Motor cable shall be of type shielded cable and it is more preferable to use shielded cables
with such two shielding layers as spiral metal belt and metal mesh. By the elevator integrated
drive controller side, the shielding layer of motor cable shall be connected, by 360° girth jointing
method and with cable clip, to the rear panel of cabinet at two points: one point shall be close to
elevator integrated drive controller as far as possible within 15cm, another point is located on
ground terminal bank. 360° girth jointing method shall also be used when the motor cable‘s
shielding layer threads through motor terminal box and grounds at motor metal casing; if it is
impractical, firstly strand both shielding layers as braid, then flatten it to width of more than 1/5
braid length in for connecting to motor terminal. The core conductor of motor cable and its PE soft
braid lead shall be as short as possible within 5cm.
(4) Terminal control cable must be of type shielded cable, which shielding layer should be
connected to terminal bank at the cable inlet of cabinet by 360° girth jointing method; the
shielding layer end connecting elevator integrated drive controller may be secured to the metal
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