Applications; Operation And Maintenance - COMEM eSDB10 Instruction Manual

Applications

eSDB type
Tap Changers eSDB10C/10 350W
eSDB12C
Network transformer eSDB14C
<40MVA
Network transformer eSDB15
>40MVA <200MVA
Network transformer eSDB30
>200MVA
Shunt reactors eSDB15
>40Mvar <200Mvar
Shunt reactors eSDB30
>200Mvar
HVDC transformers eSDB40
Furnace transformers eSDB40
GSU transformers eSDB40
* during the heating procedure
** main tank
Table 4
For each application, in case of the quantity of oil exceed the max
value for each breather, we advise to put 2 eSDB in parallel.
Operation and
maintenance
CAUTION
The total regeneration phase takes about 20 hours.
To abort the regeneration cycle, follow instructions in Appendix E.
COMEM advices to disconnect eSDB during the electrical
transformer routine test.
Maintenance
During regular maintenance on the transformer, we recom-
mend performing the following checks on the dehydrating
breather:
• Check the exterior condition of the device (especially the
filter air Fig 5-11/A)
• Check the failure contact
• Check the upper level (Fig 16-17-18/E), the internal
bubble must be inside the smallest black ring
• To perform a functional test, follow instructions in
Appendix C.
10
Power Silicagel**
consumption*
2 kg
350W 2 kg
350W 2 kg
600 W 2,5 Kg
600 W 3 kg
600W 2,5 Kg
600 W 3 kg
600 W 6 kg
600 W 6 kg
1200W 6 kg
NOTE
NOTE
SELF-DEHYDRATING BREATHERS eSDB 10/15/30
If the fitting is not powered for more than 3 days, the clock will
re-start at the next powering from the date and hour of the end of
the last regeneration cycle.
It is not possible to do the functional test if the regeneration
process is activated.
Movement, transport and storage
Move the eSDB15/30 using the eyebolts in the upper part
(Fig 16-17-18/F). Handle the device with care.
When you remove the device from the transformer (for
example during shipping operation), please follow the
procedure:
• Switch off the supply voltage
• Remove the supply wire from the terminal box
• Turn the screw on the bottom side (Fig. 5-11) with the
maximum torque of 2 Nm (1.5 lbft)
CAUTION
During the transformer transport, we advise to disassemble the
air breather and to place it inside the original box.
Not to paint the device. In this case any guarantees concerning
the corrosion resistance decline.
Only mild soap and water should be used to clean the electrical
box cover. Solvents must not be used for any reason as they will
degrade the performance of the paint. Use of solvents on the
unit will immediately void the warranty.
When you install the device please follow section from page
6 to 10.The eSDB must be stored in the original packing
and in a dry place with temperature in the range -10÷40°C
(14÷104 °F).
Upon receiving the device, please check:
• The outer surface of the packaging to ensure that it is
intact
• That there are no breakages.
If damages are found, please contact COMEM and pro-
vide the information from the shipping list and the serial
number of the Self-dehydrating breather.
NOTE
NOTE