Grounding; Printed Circuit Boards And Fiber Optic Cables - ABB DCS880 Manual

Notes:
−
The motor/load cable terminals on the drive/unit are at a dangerously high voltage
when the mains power is on, regardless of whether the motor/load is running or not.
−
Depending on the external wiring, dangerous voltages (115 V, 220 V or 230 V) may be
present on the relay outputs of the drive/unit system (e.g. XRO1 ... XRO3).
−
DCS880 with enclosure extension: Before working on the drive/unit, isolate the whole
drive/unit system from the supply.

Grounding

These instructions are intended for all who are responsible for the grounding of the drive/unit. Incorrect
grounding can cause physical injury, death and/or equipment malfunction and increase electromagnetic
interference.
WARNING
−
Ground the drive/unit, motor/load and adjoining equipment to ensure personnel safety
in all circumstances, and to reduce electromagnetic emission and pick-up.
−
Make sure that grounding conductors are adequately sized and marked as required by
safety regulations.
−
In a multiple-drive/unit installation, connect each drive/unit separately to protective
earth (PE
−
Minimize EMC emission and make a 360° high frequency grounding (e.g. conductive
sleeves) of screened cable entries at the cabinet lead-through plate.
−
Do not install a drive/unit equipped with an EMC filter to an ungrounded power system or
a high resistance-grounded (> 30 Ω) power system.
Notes:
−
Power cable shields are suitable as equipment grounding conductors only when
adequately sized to meet safety regulations.
−
As the normal leakage current of the drive/unit is higher than 3.5 mA
protective earth connection is required.
−
This product can cause a DC current in the protective earthing conductor. Where a
residual current-operated protective (RCD) or monitoring (RCM) device is used for
protection in case of direct or indirect contact, only an RCD or RCM of Type B is allowed
on the supply side of this product.

Printed circuit boards and fiber optic cables

These instructions are intended for all who handle the circuit boards and fiber optic cables. Ignoring the
following instructions can cause damage to the equipment.
WARNING
−
The printed circuit boards contain components sensitive to electrostatic discharge.
Wear a grounding wrist band when handling the boards. Do not touch the boards
unnecessarily.
−
Use grounding strip:
−
ABB order no.: 3ADV050035P0001
WARNING
−
Handle the fiber optic cables with care.
−
When unplugging optic cables, always grab the connector, not the cable itself.
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5
or 10 mA a fixed
AC DC
Safety instructions