Vaisala Optimus OPT100, Руководство по установке

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• Operating altitude : DGA monitor is intended for use in altitude range -1000 … 3000 m.
If you have any questions, contact Vaisala for more information.
Performing a site inspection in person is a good idea. Take photographs of the
intended installation location, oil connections, and electrical connections. Measure
the amount of cable and oil pipe needed.
2.8.1 Installation location of DGA monitor
DGA monitor can be attached to the transformer chassis or to its immediate vicinity. The
location must fulfill the following requirements:
• The location must be close to the oil connections to minimize the length of the oil lines.
The maximum length of the lines is 10 m (33 ft) each.
• The location must be safely accessible from the floor without the need to climb or reach.
• There must be enough room and suitable supporting structures to install the DGA monitor
in a vertical orientation. The DGA monitor must not be tilted more than 5 degrees.
• If the Ground Mounting Set is used, there must be a level concrete surface that is at least
100 mm thick.
If you have many suitable locations, prefer the following:
• Locations that are protected from rain and solar radiation.
• Locations where the vibration and heat from the transformer are not directly conducted
to the DGA monitor.
2.8.2 Installation weather
If the installation site is outdoors and not protected from the effects of weather, make sure you
can keep the equipment clean and dry during installation and service activities:
• Avoid working on the DGA monitor in rain or any kind of storm, and in temperatures
below −20 °C (−4 °F).
• Keep equipment off the ground, especially if the ground is wet.
• Cover any tools and parts that are not being used. It is especially important to keep the
oil pipes and oil connectors clean and dry.
• Keep the cabinet doors closed when not working inside the cabinets. This is important for
keeping the inside of the DGA monitor clean and the measurement environment stable.
2.8.3 Recommended locations of oil connections
DGA monitor needs to pump oil out of the transformer and return it after each measurement
cycle. It is important that the oil is clean and from a representative location in the transformer,
and the same oil volume is not measured repeatedly.
The oil volume needed for a single measurement cycle is slightly more than one liter. To make
it possible to pump a new sample and return the measured oil without mixing them up, you
must build two oil lines between the DGA monitor and the transformer. Consider the following
when selecting the locations of the oil connections in the transformer and preparing for the
installation:
Chapter 2 – Planning the installation
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