HYDROCAL 1005 Manual for Installation and Operation Page 5/111
2. Mounting of HYDROCAL1005 unit
2.1 Locations for installation of HYDROCAL1005
To ensure the correct function of the HYDROCAL1005 the location of mounting is very important.
For a typical transformer, four places are possible:
On return side of cooling circuit:
Please install the unit on a straight piece of tube on the cooler output between the cooler
and the main oil tank. In order to avoid negative pressure, the unit must absolutely be
mounted on the downstream side (after the bend) of the oil circulation pump.
Remark: Choose this place only in case of continuous oil flux through the cooler.
Flange below on the transformer tank:
The flange must be at minimum height of 40 cm in order to allow installation and mounting
of HYDROCAL1005 unit.
Upper filling valve:
It is possible to mount the Hydrocal 1005 unit on this position, if the filling level of
the oil is min. 100 cm higher than the mounting position. This position is not rec-
ommended, because the filling process is influenced by the hydrostatic pressure of
the oil and it may be difficult to operate and read the data of the unit.
Never install the HYDROCAL1005 unit on top of the cooler or on the suction face of
the pump. In this case, filling oil step cannot be carried out in the right way.
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