GE Hydran 201i Installation Manual page 11

readings; however, the lower operating temperatures and ease of access
make this location a valid alternative choice.
Also, note the following points:
1. The H201Ti must always be easily accessible. The distance between the valve
and the ground must exceed 30cm (12in) to install and wire the H201Ti.
2. Do not install the H201Ti on an elbow (see Figure 10) or a fitting box. The
turbulent oil flow at these locations may result in inaccurate gas level
readings.
3. If the H201Ti is mounted directly on the wall of the transformer tank, ensure it
is installed below the oil level.
4. No obstructions (baffle, pipe, etc.) must exist behind the valve (inside the tank).
5. Regardless of the selected location, it is recommended to mount the H201Ti
horizontally. If no horizontal valve is available, a vertical installation may be
acceptable; contact General Electric Customer Service (contact information
can be found at the bottom of page 2). If the H201Ti is installed vertically,
note the following points:
- The sensor's threaded extremity must be oriented upward.
Page 12
Figure 2: Mounting Locations of the H201Ti on a Transformer
Hydran* 201i Installation Guide
17996 Rev5, August 2013