computer can be connected to the network as long as only one is communicating at the
same moment.
When an optional smart modem is installed in an H201Ci, the network can be
accessed through the public telephone system. The H201Ci manages the modem
operation to allow receiving and handling phone calls from distant modems, and
properly ending the calls. Conversely, the modem is instructed to dial a distant modem if
an alarm is sensed in an H201Ti (unless this function is disabled by the user).
2.4 Description of the Hydran 201i systems
The Hydran 201i System is made up of different units assembled in several possible
configurations to provide a variety of useful combinations for the detection and
monitoring of failure conditions in oil-filled electrical equipment. The following
vocabulary and abbreviations are used to describe the main components of this system:
• Hydran 201Ti Intelligent Transmitter: The basic building block; includes the
sensor; can be used in full stand-alone mode. Can be abbreviated as follows:
- H201Ti Intelligent Transmitter
- H201Ti Transmitter
- H201Ti
• Hydran 201Ci-1 One-Channel Controller: Combined with one H201Ti. Can be
abbreviated as follows:
- H201Ci-1 One-Channel Controller
- H201Ci-1 Controller
- H201Ci-1
• Hydran 201Ci-C Communications Controller: Allows computer supervision of up
to four H201Ti’s. Can be abbreviated as follows:
- H201Ci-C Communications Controller
- H201Ci-C Controller
- H201Ci-C
• Hydran 201Ci Controller: Generic designation of H201Ci-1 and/or H201Ci-C. Can
be abbreviated as follows:
- H201Ci Controller
- H201Ci
• Hydran 201R Model i Incipient Fault Monitor: Made of an H201Ti plus an H201Ci-
1. Can be abbreviated as follows:
- Hydran 201R Model i
• Hydran 201i System Incipient Fault Monitor: Combination of H201Ti’s and
H201Ci’s. Can be abbreviated as follows:
- Hydran 201i System
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