Drying Process - c.a.p.t. AT Serie Manual Del Instrucciones

TECHNICAL INFORMATION
In case of any doubt concerning assembling or operational question, please contact CAPT Technical office.
TO PRESERVE TAP CHANGER
When tap changer has been removed from packaging and envelope is necessary keep it in a dry and clean
environment, without dusty and pollution. For better preserve the contact surface, especially in case of a
long period of stock, we suggest to lubricate fixed and sliding contacts with transformer dielectric oil.
ASSEMBLING
Tap changer assembling procedure, drive and fittings are explained on attached drawings.
- During assembling operations check that surfaces where OR & seals are inserted must be flat and clean,
without dusty or corrugated.
- Be very careful when the shaft must be drilled to insert the elastic/cylindrical pins. Avoid any slot and
check the correct drill diameter.
- Arrange tap changer and drive control in the middle position before to lock the gear shafts with pins to
divide the clearance in both operation directions. (i. e. when tap changer has 5 positions, in pos. 3). (Fig.
B/C pag. 11)
- Please check very carefully that in all phases, the moving contacts are well centered between the fixed
contacts (Fig. D pag. 12).
- The tap changers have to be installed parallel with the tank wall/cover from which they exit. Therefore
the driveshaft has to be perfectly perpendicular (Fig. A /C pag. 11).
SHAFT AND CLAMP MOUNTING INSTRUCTIONS (Fig. A/C pag. 11)
1. For transport reason, when shaft is very long, you receive this tap changer with shaft and clamp
dissassembled.
2. To position the shaft you have to procede as follows:
A) Insert the shaft inside support with pin hole in the below side of tap changer.
B) Insert the elastic pin to block shaft/gear.
3. To position the clamp proceding as follows:
A) Unscrew the white bolts and nuts in polyammide
B) Insert the clamp with free holes in the top side
C) Screw the white bolts and nuts.
INDIRECT TRANSMISSION:
In the case the assembly diagram instructions call for the use of universal type "1S" joints, pay great
attention to the drilled sections "Z" where the cylinder pins are inserted. These pins are highlighted in the
enclosed diagram (see fig. F page 12)

DRYING PROCESS

1) Before and after the treatment is necessary to lubricate all fixing and moving contacts and the gear of
tap changer with dielectric oil.
2) Do not manoeuvre the tap changer when contacts are not lubricated, especially if the temperature of tap
changer is hotter than ambient temperature.
3) After treatment is indispensable check the tap changer screws, bolts and nuts, including the elastic pins
of tap changer, bevel gears and drive and if necessary screw the loosened parts or replace (pins). For series
"at" check also that the rack of bakelite moving rod touch the gear inside the aluminium support. In case
is necessary unscrew a bit the bolt and push the brass cylinder.
ASSEMBLY OF CONTROL DEVICE WITH INDIRECT TRANSMISSION (Fig. pag. 13-14-15)
In the enclosed design-instruction booklet the main assembly phases are shown.
Consult the CAPT catalogue for further information.
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