GE Hydran 201i, Инструкция по эксплуатации

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Chapter 6 • Hydran 201T
i
Installation
6-26 Rev. 6, March 2011 Part 17997
• Conduits, or cable armors, should be made of steel to shield against magnetic fields.
• Nonconducting conduit fittings (made of plastic, for example) can be used on the
connection box if ground loops through the conduits may cause problems (for example,
if the transformer tank is grounded at a single point and monitored continuously for tank-
to-ground currents).
The procedure is as follows:
1. Remove the cover from the connection box located under the brass adaptor.
2. As required, install one or two watertight conduit fittings (not supplied) onto the
connection box.
• One conduit is used to run the supervisory link cable (which connects the H201T i to the
Hydran 201C i Controller) and, if used, the cable of the H201T i ’s analog output.
• One conduit is used to run the power supply cable and, if used, the cable of the H201T i ’s
alarm contacts.
3. Mount a conduit to each fitting.
Note: The ac power to the H201Ti can be supplied from the H201Ci-1 Controller (via
terminals 4 to 6 of the main terminal block) or from a different source. The H201Ci-C does
not have terminals used to supply power to the H201Ti.
4. Ground the conduits and/or cable shields at some point. Follow the company
regulations meticulously.
6.3.9 Installing the Supervisory Link and Analog Output Cable
Note the following considerations prior to installing:
• The supervisory link cable is supplied only when the Hydran 201T i is part of a
Hydran 201R Model i or is ordered with a Hydran 201C i -C Controller.
• A supervisory link cable connected to a H201C i -1 requires three twisted pairs and an
overall shield.
CAUTION
WARNING
The H201Ti must always be grounded, even if the transformer tank
is grounded at a single point and monitored for tank-to-ground
currents.