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Hydran* 201
i
Installation Guide
17996 Rev5, August 2013
A description of each component:
1.
Hydran 201C
i
Controller (Hydran 201C
i
-C Communications Controller or
Hydran 201C
i
-1 One -Channel Controller) installed on vibration-absorbing
rubber pads (see Figure 3)
2.
Full-bore gate or ball valve
3.
Hydran 201T
i
Intelligent Transmitter
4.
H201T
i
’s supervisory link cable in a rigid or flexible steel conduit
5.
H201T
i
’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.
H201C
i
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 H201T
i
. For a typical transformer, the four
most common locations to install the H201T
i
are shown in Figure 2.
1.
Radiator’s return pipe
: The recommended location to mount the H201T
i
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 H201T
i
with the
best combination of oil flow, temperature and ease of access.
No obstructions (baffle, pipe, etc,) must exist behind the valve
(inside the tank).
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 H201T
i
.
However, the higher operating temperatures somewhat reduce the Hydran
201 sensor lifetime. Access to the H201T
i
is also more difficult.
3.
Inlet of radiator:
See the comments on location 2.
4.
Drain valve
(bottom of tank): At this location, the H201T
i
performances are
good,
rather than excellent. The low oil flow may affect the gas level
CAUTION
