GE Hydran 201i, Instruction Manual

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Chapter 1 • Introduction
1-2 Rev. 6, March 2011 Part 17997
The Hydran 201 i System consists of an Intelligent Transmitter, named the Hydran 201T i ,
and a family of Controllers, collectively named the Hydran 201C i Controllers.
When the Hydran 201T i Intelligent Transmitter is combined with the Hydran 201C i -1
One-Channel Controller, it is called a Hydran 201R Model i Incipient Fault Monitor. A
Hydran 201T i being used alone or with other Hydran 201C i Controllers is named a
Hydran 201 i System Incipient Fault Monitor.
Both the Hydran 201R Model i and the Hydran 201 i System Incipient Fault Monitors can
be networked. The network can be tied to a Supervisory Control and Data Acquisition
(SCADA) computer with a single RS-232 line, either locally at the substation or remotely
through a telephone line and modem.
1.2 COMPONENTS OF THE HYDRAN 201
I
SYSTEM
1.2.1 Hydran 201T i Intelligent Transmitter
The Hydran 201T i Intelligent Transmitter (Figure 1-1 on page 1-3) is the foundation upon
which the Hydran 201 i System is built. It consists of a small cylindrical enclosure which
attaches directly to a transformer valve using a brass adaptor. This enclosure contains a
standard Hydran sensor, a thermal conditioning system and a microprocessor-based
intelligent electronic transmitter.
Terminal blocks are provided for easy connection of: ac power; alarm contacts (Gas High,
Gas High-High and System Fail); supervisory link; and one isolated, analog 4–20 mA
output. An RS-232 connector is provided for local computer interface.
A membrane keypad and an alphanumeric, backlit, LCD display enable full interaction
with the unit without requiring the use of an external computer.
The H201T i is described in detail in Chapter 2.