Section 3. Installation - Parker PDHX-E Series User Manual

Section 3. INSTALLATION

Precautions
During installation, take the normal precautions against damage caused by electrostatic
discharges. Earthed wrist straps should always be worn.
Power Connections
Input power is taken directly from AC supplies via the front panel mounted IEC 3-way mains
inlet socket. A mating connector is supplied with the drive. Connect the terminals marked L
and N to the AC supply live and neutral respectively, and the terminal marked E to earth.
Motor Wiring EMC Requirements
2
You must wire the motor using 1mm 5-core screened cable with a high-quality braided
screen. Cables using a metallised plastic bandage for an earth screen are unsuitable, as
there is a problem in terminating the screen in a mechanically stable manner and the screen
itself is comparatively fragile - bending it round a tight radius can seriously affect the
screening performance.
There must be no break in the 360° coverage that the screen mesh provides around the
cable conductors. If a connector must be used it should retain the 360° coverage, possibly
by the use of an additional metallic casing where it passes through the bulkhead of the
enclosure. The cable screen must not be bonded to the cabinet at the point of entry. Its
function is to return high-frequency switching current back to the drive. This may require
mounting the connector on a sub-panel insulated from the cabinet, or using a connector
having an internal screen which is insulated from the connector housing.
Within the cabinet itself, all the motor cables should lie in the same trunking as far as
possible. They must be kept separate from any low-level control signal cables. This applies
particularly where the control cables are unscreened and run close to the drive.
Motor-end connections
At the motor end, the motor cable screen must form a continuous and complete shield of the
motor wires by connecting directly to the metal motor housing. It is preferable to use motors
with internally mounted screw terminations, where provision has been made for a conductive
gland to connect the motor cable screen to the motor body. If flying-lead motors are used, it
is important that the unscreened leads are converted into a braided-screen cable within
100mm conductor length of the motor body. A separate terminal box may be used for this
purpose but the braided cable screen must be properly strapped to the motor body using a
suitable metal P-clip. The loop created at the motor end of the cable by the exposed motor
leads, between where the cable screen is bonded to the motor body and the leads enter the
motor body, must be made as small as possible. Take the drive ground connection to the
motor earth stud.
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