Preferred Locations - GE Hydran 201i Installation Manual

Hydran* 201i Installation Guide
A description of each component:
1. Hydran 201Ci Controller (Hydran 201Ci-C Communications Controller or
Hydran 201Ci-1 One -Channel Controller) installed on vibration-absorbing
rubber pads (see Figure 3)
2. Full-bore gate or ball valve
3. Hydran 201Ti Intelligent Transmitter
4. H201Ti's supervisory link cable in a rigid or flexible steel conduit
5. H201Ti's power supply cable in a rigid or flexible steel conduit
6. Cable for communications and analog outputs in a rigid or flexible steel
conduit (distinct from alarm cable conduit), toward a supervisory control and
data acquisition (SCADA) system
7. Cable for alarms in a rigid or flexible steel conduit, toward a SCADA system
8. H201Ci Controller's power supply cable in a rigid or flexible steel conduit

2.2 Preferred Locations

For meaningful readings and good response time, the most important factors are
proper location and installation of the H201Ti. For a typical transformer, the four
most common locations to install the H201Ti are shown in Figure 2.
1. Radiator's return pipe: The recommended location to mount the H201Ti is on
the straight section of the radiator's return pipe, which is joining the bottom
of the radiator to the transformer's main tank (on the discharge side of the
pump to avoid negative pressure). This location presents the H201Ti with the
best combination of oil flow, temperature and ease of access.
CAUTION
2. Filling valve (top of tank): In terms of performance (excellent convective oil
flow), this location is a very good alternative location to install the H201Ti.
However, the higher operating temperatures somewhat reduce the Hydran
201 sensor lifetime. Access to the H201Ti is also more difficult.
3. Inlet of radiator: See the comments on location 2.
4. Drain valve (bottom of tank): At this location, the H201Ti performances are
good, rather than excellent.
17996 Rev5, August 2013
No obstructions (baffle, pipe, etc,) must exist behind the valve
(inside the tank).
The low oil flow may affect the gas level
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