Installation; General Information; Normal Installation Conditions; Preliminary Operations - ABB HD4/R Installation And Operating Instructions Manual

7. Installation

7.1 General information

Correct installation is of primary importance.
The manufacturer's instructions must be
carefully studied and followed. It is good
practice to use gloves for handling the com-
ponents during installation.
All the operations required for installation,
putting into service, service and mainte-
nance must be carried out by qualified per-
sonnel.

7.2 Normal installation conditions

Maximum ambient air temperature
Minimum ambient air temperature
Relative humidity
Altitude
It must be possible to ventilate the installation room.
Comply with the indications in the product standards (IEC
62271-100) if other installation conditions are involved. Please
contact ABB for special installation requirements.
The areas through which power conductors or auxiliary circuit
conductors are routed must be protected against the access of
animals which could lead to damage or disservice.

7.3 Preliminary operations

– Clean the insulating parts with clean dry rags.
– Make sure that the upper and lower terminals are clean and
free of any deformation caused by shocks received during
transport or storage.

7.4 Installation of fixed circuit-breakers

The circuit-breaker can be installed straight on the floor or on
supporting frames provided by the customer (see fig. 8).
The areas on which the supporting frames or truck (if provided)
rest must be on the same plane to avoid any risk of distortion
in the breaker structure.
A minimum degree of protection (IP2X) must be guaranteed
from the front towards live parts.
The apparatus can be fixed in the following ways:
– by means of special expansion anchoring bolts with M8
threaded hole if the apparatus is fixed to a cement floor
– by means of M8 bolts if the apparatus is fixed to metal
structures or to cement floors into which special steel sec-
tions have been embedded.
Whatever the method used, the fixing surface must be well-
levelled and all the resting points must be on the same hori-
zontal plane.
+ 40 °C
– 5 °C
% ≤ 95
≤ 1000 m

7.5 Installation of plug-in circuit-breakers

Plug-in circuit-breakers are designed for use in UniSwitch or
UniAir switchgear. Special assembly operations are not usually
required.
However, consult the documentation of the switchgear in ques-
tion.

7.6 Power circuit connections

7.6.1 General recommendations
– Make sure that the circuit-breaker terminals are clean and
are free from any deformation caused by shocks received
during transport or storage.
– Choose the conductor cross-sections to suit the service
and short-circuit current of the installation.
– Provide suitable supporting insulators near the fixed circuit-
breaker terminals or the monoblocs of the cubicles, sized
according to the electrodynamic stress caused by the
short-circuit current of the installation.
Figura 7
The circuit-breaker terminals are always sil-
ver-plated. To clean them, use only dry rags,
soaked in a suitable solvent if necessary.
NOTE. Never use a file or emery cloth!
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