ENGLISH
______________________________________________________________________________________________
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C.A.P.T. S.r.l. con Unico Socio
Soggetta a direzione e coord. di
Maschinenfabrik Reinhausen GMBH
Via Postale Vecchia 17
36070 Trissino (VI), Italia
Phone:. +39(0)445/962297
Fax: +39(0)445/490606
http://www.capt.it
E-mail:
PEC :
capt@legalmail.it
REINHAUSEN
GROUP
MAN-099-EN - rev.02 EN
8
4.2
Maintenance
During the maintenance of the transformer or at least once a year it is recommended (although
not a requirement), especially if the switch remained in the same position, with the transformer
de energized, to carry at least 10 operations across the range of taps. Such operation is
recommended for a longer life of the switch. In this way, you avoid the formation of a thin film in
correspondence of the active part of the fixed and moving contacts, due to oxidation and
impurities dispersed in the oil.
It also protects against the formation of "pyrolytic" carbon formation that can occur when the
contacts remain on a position for a long time, with a consequent increase of the contact
resistance. Before and after this self-cleaning of the contacts, it may be useful to check the
efficiency of the switch by means of a resistance measurement (mΩ) of the phases.
5.
INSTALLATION
5.1
Tap-changer
The tap-changer has to be fixed inside the transformer by using the through holes (X).
It is recommended, for models 099-04.100 and 099-45.117 with voltage class 24 kV,
using fixing supports or brackets made of insulating material
Information about fixing dimensions and material for finding support are easily available on
C.a.p.t catalogue on web site www.capt.it.
Install the tap-changer in one of the central positions as shown in figure 7. Check the correct
position of moving contacts by holes in the fixed bar of tap-changers as shown in figure 8.
Before carrying out any operations lubricate fixed and movable contacts with
insulating oil