MR monitoring system – know what's going on

More than 40 years of electronic voltage regulation and more than 10 years of monitoring expertise have allowed us to continually develop and improve our monitoring systems.

Our monitoring solutions measure and calculate the most important operating states of the transformer and its components. This enables them to fulfill all current standards. Sensors can be connected via digital or analog inputs. The operating states are displayed locally in a browser and can be sent to the control room using conventional control system protocols. This is a perfect method for monitoring the operating states of your equipment. Users also have the option of adding automation tasks (e.g. cooling system control, automatic voltage regulation) to our monitoring systems. Thanks to ISM® Intuitive Control Interface (IICI), on-site commissioning can be carried out quickly and easily with an intuitive graphical interface.

The ETOS® series monitors MR on-load tap-changers. Our expert knowledge spanning four decades was used in the development of this technology. In addition to the tap changer, the ETOS® monitors the transformer and all its components. These systems have a modular design, which allows them to be configured to fulfill various requirements for monitoring and controlling power transformers.

 

Open for everything. Our module blocks.

Efficient control and monitoring of transformers.

  • Innovative top drive or proven drive technology with mechanical drive linkage
  • Integrated motor current monitoring and monitoring of tap position
  • Conforms to IEC 60214-1:2014
 
Standard functions (contained in every ETOS® design)
  • Status monitoring of the protective devices (e.g. RS2001, Buchholz relay, PRD)
  • Monitoring the oil temperature
  • System voltage, load current, frequency, load factor, active power, reactive power, apparent power
  • Hot-spot calculation in accordance with IEC 60076-7 or ANSI/IEEE C57.91
  • Calculation of aging rate and loss-of-life
  • Tap position capture
Advanced functions
  • Capability of transformer to handle overload in the short or long term with live calculation and simulation of overload forecasts in accordance with IEC 60076-7 or ANSI/IEEE C57.91
  • Calculation of the bubbling temperature
  • Calculation of paper moisture content
 
Cooling system monitoring
  • Number of starts per cooling level
  • Operating time per cooling level
  • Monitoring of Rth and cooling efficiency
Cooling system control
  • Switching points, hysteresis and delay times adjustable to your needs
  • Various control algorithms (Periodic cooling group activation or predictive cooling)
  • Fail-safe mode
 
Standard functions
  • Status monitoring of the motor-drive signals
  • Maintenance recommendations and maintenance interval calculation for OILTAP® and VACUTAP®
  • Calculation of contact wear for OILTAP®
  • Tap-position statistics for the OLTC (number of tap-change operations/tap, duration per tap)
  • Monitoring of OLTC oil temperature
Advanced functions
  • Motor current index in accordance with IEEE PC57.143
  • ETOS® ED: OLTC torque monitoring
 
  • Online recording of up to ten corrosive gases, relative moisture in oil and relative overall gas content
  • Configurable limit value for each gas
  • Diagram of the measured values
  • Measured value memory
  • Universal 4…20mA or Modbus RTU Interface for capturing the DGA sensor signals
  • Standard evaluation methods in accordance with Duval, Rogers, Dörnenburg and IEC 60599
 
Standard functions
  • Measurement of system voltage and load current (single- or three-phase)
  • One desired value
  • Voltage regulation with linear delay time T1
  • Status of the motor-drive unit
Advanced functions
  • Various types of desired-value setting (three or fi ve desired values, TAPCON® Dynamic Setpoint Control, desired-value setting via analog value, raise/lower pulse, desired value via BCD)
  • Automatic voltage regulation with linear or integral time characteristics and two delay times T1 and T2
  • Parallel operation via CAN bus (up to 16 transformers)
  • Line drop compensation (RX or Z compensation)
  • Monitoring of bandwidth
  • Function monitoring
  • Limit-value monitoring
 
  • Monitoring of changes in C1 capacitance
  • Monitoring of the dissipation factor (tan δ)
  • System voltage
 
Additional functions
  • Freely programmable digital and analog inputs and outputs
  • Open programming with function blocks possible with TPLE function
  • Optional: Integration of functions in a motor-drive unit for the on-load tap-changer (side drive or innovative top drive)
  • Optional: Integration of the complete control including power unit of a conventional cooling system. Can also be combined with the advantages of intelligent cooling system control, such as predictive cooling, on request
Visualization
  • Visualization using web server (SVG and HTML 5) included as standard for various end devices
Communication
  • IEC61850 Ed. 1 and Ed 2. MMS, and GOOSE
  • IEC60870-5-101, -103, -104
  • DNP3
  • Modbus TCP, RTU, ASCII
  • Remote maintenance support