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70 Permskaya street, Suite 403,
Perm, Russia, 614000
Phone :+7-(342) 212-23-18
Ph/Fax:+7-(342) 212-84-74
E-mail : dimrus@dimrus.com

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Dimrus company

Safe and reliable operation of High Voltage equipment is absolutely critical issue in any industry. DimRus developing and manufacturing a variety of modern diagnostic equipment for monitoring of multiple operating parameters and conditions of almost all electrical and mechanical systems in Medium and High Voltage electrical apparatus. Versatile systems for continuous monitoring and portable instruments for periodical testing are available from our company.

Performance and quality of our products are recognized worldwide. DIMRUS test equipment is working in more than 45 countries including UK and USA.

Using our continuous monitoring systems allow for fully automated diagnostics of any HV equipment in power generation, power distribution and in other industrial applications.

All our monitoring systems and portable devices are coming with expert diagnostic software giving very efficient tools into the hands of operating and maintenance personnel for safe and reliable operation of their equipment. Invaluable information can be used in advanced planning for maintenance and repair, saving money by avoiding unplanned outages and lost production and by minimizing insurance premiums.

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Company news

21 September 2015

TDM-TS – Cooling Control System for High-Power Transformers

TDM-TS

«TDM-TS» multipurpose microprocessor system is for effective operation control of fans and oil pumps in the cooling systems of high-power transformers (220 – 500 kV).

«TDM-TS» includes the whole set of monitoring and control functions, which provides sustaining optimal temperature parameters for the power transformer in all the operation modes, including transient modes (switching on/off).

«TDM-TS» system consists of the four main parts:

  • the set of sensors;
  • the microprocessor device (controller) for the sensor signal measurement and processing and for control signals formation;
  • the control board with contactor switches for connecting pump and fan motors;
  • the protective enclosure for the device mounting beside the transformer.

«TDM-TS» Control Functions:

«TDM-TS» system has got the following control functions:

  • Transformer cooling system activation during the transformer start-up. The controller operation algorithms depend on the cooling system type and the initial oil temperature.
  • Switching on/off the fan and pump motors of the cooling system for maintaining the transformer tank temperature at the desired level.
  • Fast activation of additional cooling system elements when the transformer loading grows up. This function allows avoiding transformer winding overheating.
  • Switching the cooling system beforehand, in accordance with the planned loading schedule - «precooling» function. This function allows bringing down the temperature of the hottest spots of the winding.
  • Planned deactivation of cooling system fans and pumps during planned transformer switch off.

21 September 2015

TDM-TR – Cooling Control System for 110kV Transformers

TDM-TR

«TDM-TR» microprocessor system is for effective operation control of fans and oil pumps in the cooling systems of 110kV transformers. «TDM-TR» includes the whole set of monitoring and control functions, which provides sustaining optimal temperature parameters for the power transformer in all the operation modes.

«TDM-TR» system consists of the four main parts:

  • the set of sensors for monitoring transformer parameters;
  • the microprocessor device (controller) for the sensor signal measurement and processing and for control signals formation;
  • the control board with contactor switches for connecting pump and fan motors;
  • the protective enclosure for the device mounting beside the transformer.

«TDM-TR» Control Functions:

«TDM-TR» system has got the following control functions:

  • Transformer cooling system activation during the transformer start-up.
  • Switching on/off the fan and pump motors of the cooling system for maintaining the transformer tank temperature at the desired level for all the operational modes.
  • Fast switching on/off the additional cooling system elements when the transformer loading changes.
  • Switching the cooling system beforehand, in accordance with the planned loading schedule - «percooling» function. This function allows bringing down the temperature of the hottest spots of the winding.

For the control functions to be realized to the full extent, all the elements of the transformer cooling system are divided into several groups in accordance with their level of importance, for big transformers one group can include several fans.

«TDM-TR» efficiently evaluates the cooling system operation by analyzing the following parameters:

  • average transformer tank temperature;
  • the difference between the top and bottom tank temperatures;
  • transformer phase loading;
  • ambient temperature and humidity.

The imbalance of the mentioned above parameters indicates the cooling system problems and efficiency degradation.