COMEM R.I.S. Einbauanweisungen Seite 12

- Before installing the device remove the protective cap from the oil down flow hole.
- Ensure the bearing surface is smooth and flat.
- A four stud fixing is racommended.
- Protect the R.I.S. device from any subsequent paint operation.
- Only install the R.I.S. after the transformer drying operation.
- Switch off the supply voltage prior to working on the R.I.S.
- Operation and maintenance of the R.I.S. should only be carried out by skilled personnel.
- COMEM SPA disclaim all responsability for incorrect installation or improper use.
- On receipt of the goods please check the attached test certificate.
- The R.I.S. is guaranteed against defective parts for 12 months.
- Do not use powerful solvents or benzines for cleaning. A damp cloth should.
- Do not use the oil filter on the R.I.S. for general filling of the transformer, only for topping up the R.I.S.
- When filling the R.I.S. with oil make sure the bleed cock is open and fill until float reaches the "MAX" position.
- After filling ensure the bleed cock and filler cap are fully closed. Hand tighten only, no tools required.
- After setting the thermometer pointer ensure the protective window is secured, hand tighten only.
- Check the cable gland is securely fitted.
- The eventual connection with the conservator cupling shall be made at room temperature (≈ 23 °C) with a torque of
max. 12 Nm as specified.
- When connecting to a conservator use LOCTITE 542 type sealing glue.
- The event of a major oil level variation or high gas evolvement the float will reach "MIN" position, triggering the alarm
switch, it will then be necessary to bleed off gas or add oil.
The device is filled with oil exclusively by the transformer manufacturer at environment temperature. At the time of put-
ting into service, ensure what the R.I.S. device is completely filled with oil. For various reasons, the oil may be below
the set level. If the transformer is warm, due to high environment temperature or to its own operation, the internal pres-
sure may increase, causing a visible drop in the oil level in the chamber ofthe device.
- To solve this problem it is sufficient to remove the lead seal on the lever ofthe tap 1 (see diagram), partly unscrew
cap 2, slightly turn the lever of tap 1, thus releasing pressure and causing the oil level to rise until the device is com-
pletely full. After operation, ensure that cap 2 is closed and clean off any oil I that may have leaked out ofthe device.
- When the transformer is cold, due to a long period of inactivity, and/or an outdoor temperature below that of the envi-
ronment, a vacuum may form inside the transformer, with consequent fall of the oil level visible on the external cham-
ber of the device. This problem may be solved by removing the lead seal on the cap 2, unscrewing the cap and top-
ping up the oil level slowly with the aid of a funnel until the device is completely full, taking care not to let it overflow.
Close the device with the cap 6, without using tools or spanners. Once the oil level in the device has been topped up,
the transformer may be started.
If there is no oil available for topping up, Comem supplies a set of accessories with the pump which can create a
vacuum in the device, thus restoring the oil level.
12
R.I.S. INSTALLATIONS AND OPERATING INSTRUCTIONS
INSTRUCTIONS FOR TOPPING UP THE LEVEL ON THE R.I.S. DEVICE
WARNING
FOREWORD