3 INSTALLATION
The Hydran M2-X is typically installed on a full-bore gate or ball valve of a
transformer. There are two cables:
• The Hydran M2-X’s power supply cable is passed in a flexible (recommended) or
rigid steel conduit toward a supervisory control and data acquisition (SCADA)
system.
• The alarm cable is passed in a flexible (recommended) or rigid steel conduit
toward a SCADA system.
Mounting Locations of the Hydran M2-X
A Hydran M2-X monitor can be installed on any available transformer valve.
However, care must be taken in selecting a suitable location while respecting the overall
dimensions and weight of the monitor.
To achieve optimal performance from the Hydran monitor, ensure that:
• The Hydran M2-X is installed on a single transformer valve. The valve should
have no internal restrictions, recommended to be installed full-bore gate valve
or ball valve.
• GE recommends that all cables carrying; Power, Communications, analogue
inputs and outputs, be run in either rigid steel conduit or flexible steel liquid
tight armoured conduit.
Figure 11 illustrates some typical valve locations that can be found on a transformer.
These locations vary between transformers, but there are some valve locations on a
transformer where the oil circulation is much better due to the nature of a transformer’s
operation.
The circulation of oil is generally the same in all transformers — the natural
convection of the oil circulates from warm to cool as the transformer warms up. The
oil at the bottom is usually cooler than the top as it returns from the cooling system, as
illustrated in Figure 11.
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