GE Hydran 201i Instruction Manual page 89

Hydran* 201i Instruction Manual
Location #A: Cooling Return
Some transformers may have a valve that is on the pipe that joins the bottom
of the cooling system to the transformer main tank. This location has excellent
circulation of oil. It offers easy access for installation and taking oil samples
directly from the Hydran 201Ti.
Note: If a pump is part of the cooling system, it is recommended that the
Hydran 201Ti be installed on the discharge side of the pump.
Location #B: Drain Valve
All transformers are equipped with a drain valve. This location offers easy
access for installation and taking oil samples directly from the Hydran 201Ti. Oil
flow is reduced compared to the other locations and overtime there can be a
build up of sludge which can further impede the oil flow. Due to the availability of
the valve this is an attractive location for an installation.
Note: A minimum distance of 12 in. between the ground and the valve is
required so that the Hydran enclosure and cables can be properly installed.
MA-033 Rev. 14.0, 12-Nov-18
Figure 6-9: Typical Valve Locations on a Transformer
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