MR ETOS IM, Operating Instructions Manual

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4 Product description
Maschinenfabrik Reinhausen GmbH 2019 27 5163667/06 EN ETOS
®
IM
The monitoring system takes advantage of the implemented algorithms to
largely compensate for voltage fluctuations and temperature fluctuations in
the 3-phase system, thereby ensuring reliable monitoring for the bushings.
Figure 4: Operating principle
4.3 Performance features
Depending on your order, the device is equipped with the following optional
function packages:
▪ Basic monitoring
– Voltage, current, frequency
– Active power, reactive power, apparent power, power factor
– Temperature monitoring (ambient temperature, temperature of top-oil,
temperature of bottom oil (optional), calculation of hot-spot temperature
in accordance with IEC 60076-7 or IEEE C57.91)
– Optional: Transformer oil level
– Loss-of-life and relative aging rate
– Status of the motor-drive unit (motor protective switch, motor is running)
– Tap position display
– Optional: Status of protective devices (Buchholz relay, protective relay,
pressure relief device)
▪ On-load tap-changer monitoring
– Contact wear calculation (only for OILTAP® V, M, R, RM, MS, G)
– Maintenance interval calculation
– Oil carbonization (only for OILTAP® V, M, R)
– Monitoring of OLTC temperature (optional)
– Tap-change statistics of on-load tap-changer
– Optional: on-load tap-changer oil level
– Optional: oil filter unit