Internal Components; Brass Adaptor - GE Hydran 201 i Instruction Manual

Chapter 2 • Hydran 201Ti Intelligent Transmitter
4. Breathing Membrane: This Gore* porous membrane is impervious but allows
oxygen to penetrate inside the H201Ti. The H201 sensor requires oxygen to detect
the dissolved gases in oil.
5. Knob: It maintains the aluminum cover in place.
2.4

INTERNAL COMPONENTS

An internal view of the Hydran 201Ti is presented in Figure 2-2 on page 2-5. The major
components are described in this Section:
1. Brass adaptor: See Section 2.4.1 on page 2-4.
2. Heating plate: See Section 2.4.2 on page 2-5.
3. Hydran 201 sensor: See Section 2.4.3 on page 2-6.
4. CPU module: See Section 2.4.4 on page 2-7.
5. DB-9 male connector for the RS-232 link: See Section 2.4.5 on page 2-7.
6. I/O module: See Section 2.4.6 on page 2-7.
7. Connection box: See item 2 on page 2-2.
2.4.1

Brass Adaptor

The Hydran 201Ti and the Hydran 201 sensor mount onto the valve of the transformer or
other electrical equipment using a flanged brass adaptor (item 1 in Figure 2-2 on page 2-5).
This adaptor has male threads at one end that screw directly onto the transformer valve, and
female threads at the other end to which the sensor is screwed. The heating plate of the
H201Ti's enclosure bolts onto the adaptor flange. The H201Ti can thus be installed or
replaced without removing the adaptor and the sensor from the transformer valve.
The standard brass adaptor (Figure B-3 on page B-2) has 1.5-in NPT male threads (internal
diameter of 38 mm) on the valve side. It can also be purchased from General Electric
Canada with 1- or 2-in NPT sizes (25 or 51 mm) male threads (Figure B-4 on page B-3 and
Figure B-5 on page B-4). The female threads of the adaptor are 1-in NPT (25 mm) to adapt
to the threads of the H201 sensor.
2-4 Rev. 6, March 2011 Part 17997