Selection Of Suited Connection Cables - ABB EBN861 Operating Instruction

20 EBN853 / EBN861 ELECTRONIC UNIT | OI/EBN853/EBN861/EX-EN REV. C
... 7 Electrical connections
... Conductor cross-section on electronic unit

Selection of suited connection cables

Please observe the following information when selecting cables:
• Use suited cables only for the electric connection
between the Contrac control actuator in potentially
explosive atmospheres and the components outside of
the potentially explosive atmospheres.
• Use shielded cables for the motor / brake cable, the
sensor cable, and the signal cable to the control system /
controller.
• Connect the shielding of the motor / brake cable and the
sensor cable on both sides (to the actuator and to the
Contrac electronic unit).
• For the connection between the motor and motor
temperature monitoring unit and for the power supply,
shielded cables are not required.
Installation information on the cable harness for actuators in
Ex design
The electrical connection between the Contrac electronic unit
and the Contrac actuator can be established using the cable set
(order code 695). The cable harness is not part of the Ex
prototype test certificate and must therefore be tested for
safety-relevant functionality within the complete installation by
the installer or operator.
If the specified cable harness does not meet all safety-relevant
requirements, the proper installation material must be used.
For the specified motor connection cable, the shielding must be
connected at both ends and connected with protective ground.
Change from two to one column
Please observe the following information when installing the
cable set:
• The specific regulations governing the installation of
electric systems in potentially explosive atmospheres
must be observed during electric installation work. The
provisions in accordance with EN 60079-14 must be
observed, particularly in respect of installing the shield
bonding and potential equalization between the actuator,
electronic unit, and motor protection equipment, see
Connection of cable shielding on page 30.
• The motor and position sensor may only be connected
using IP 66 Ex cable glands in accordance with EN 60079
ff with EU type examination certificate in accordance
with Directive 2014/34/EU.
• Use a cable lug or a solid wire, bended to a 'U', to connect
the motor cable
• Make sure that sufficient strain relief measures are in
place for all cable connections.
• Protect all cables in the connection chambers sufficiently
against contact with metal components. Guarantee a gap
of at least 6 mm (0.24 in) between all conductive
components.
• Remove the desiccant in the connection chamber of the
motor and position sensor.
• Do not change the factory-set installation position of the
motor junction box.
• Close off any cable entries that are not required using
ATEX-certified IP 66 sealing plugs.