ABB HD4/R, Installation And Operating Instructions Manual

19

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 

+ 40 °C 

Minimum ambient air temperature 

– 5 °C 

Relative humidity 

% 

≤

 95 

Altitude

≤

 1000 m

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.

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. 

  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!  

Figura 7