Compact in size but powerful in performance
Oil Filter Unit
WHY OIL FILTER UNIT?
- Features
Oil Filter Unit
In its cylindrical tank, the pump unit contains the feed pump, the pump motor and the filter cartridge.
The flange connection for the oil feed /return pipes are installed on the upper and the lower covers of the tank. This ensures clear arrangement of the pipes between pump unit and on-load tap-changer head.
A pressure switch and a manometer monitor permissible working pressure. A temperature switch is available for low temperature operation as a special feature.
Easily accessible when the upper cover is removed, the filter insert is simple to replace when necessary with the existing lifting handles.
The pump unit is connected by pipes on the on-load tap-changer head. The head is equipped with the flange connection for oil feed (suction pipe) and oil return.
With each diverter switch action, the Oil Filter System automatically handles the filtering and drying of the switching oil. The pump motors starts up and suctions the oil in to the oil filter via the suction line of the on-load tap-changer and the pipe. The oil enters the filter tank from the bottom and is pressed with the feed pump through the filter insert. The purified oil leaves the pressure tank from the upper cover and flows back through the pipe to the on-load tap-changer head.
The working pressure between feed pump and filter insert can be read with the manometer. This working pressure increases with the time due to the accumulation of solid materials in the filter insert. When the increasing pressure exceeds the set maximum value, the filter insert must be changed. When the pressure switch triggers, a signal contact is activated this tells the control room that the maximum value has been reached.
Transformer Monitoring
MODERN, SUPERIOR & VERSATILE
Load current and Voltage measurement
Active and reactive power
Oil temperature
Winding temperature
Ambient temperaturev • Alarm and tripping signals from various devices (e.g. Bucholz, etc)
Gas and Moisture measurement as taken from Sensors
Oil level indication
Control System Communication
MODERN, SUPERIOR & VERSATILE
Connection to SCADA / DCS
IEC 60870-5-101 and 104
IEC 61850
Integrated web-server
Individual Solutions
MODERN, SUPERIOR & VERSATILE
Tailor-made monitoring functions (e.g. overload capability)
Freely configurable inputs and outputs
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