For 1 year MIKO-9A milli-ohmmeter is been used in the laboratory of insulation testing and over voltage protection service.
The device is used to test the resistance of substation equipment. During the operation, device was distinguished by its simplicity in assembling the measuring circuit, reliability when taking into account operation temperature conditions, relative speed of measurements that makes it possible to reduce the time during testing. The compactness and low weight of the device simplify the operation and transportation process. The resistance measurement function is the best because of the accuracy and quick detection of results. It is also worth noting that the mode of non-demountable diagnostic of OLTC devices is very convenient for assessing the state of the switching device and significantly reduces the amount of work. Since the device has been used relatively recently, no electrical equipment malfunctions have been detected.
Despite the short period of use, for the quality, versatility and conformity of price and quality, Uranenergo, LLP confidently recommends MIKO-9A for testing high-voltage equipment, and hopes for the appearance of new and innovative devices manufactured by SKB EP, LLC.
TSU Rus, LLC
To date, one MIKO-21 device is used in the laboratory of TSU Rus, LLC.
This device is used in field tests to check the resistance of the equipment protective grounding as a part of the process of obtaining CE marking. During the tests, MIKO-21 showed high reliability, accuracy in severe conditions of exposure to electromagnetic interference in production.
The main advantage of this device within the framework of the carried out tasks are the ability to work from a rechargeable battery, a strong case that is durable to mechanical influences during transportation of the device, as well as the stability of the device to climatic external factors.
The main faults detected by MIKO-21 are non-compliance of the protective grounding resistance of the equipment with the harmonized EU standards.
The use of the above device helped to automate and speed up the testing of equipment as part of the process of obtaining CE marking.
During the operation of the device since July 2020, there have been no serious shortcomings and malfunctions. It is possible to recommend the use of MIKO-21 micro-ohmmeter for use in electrical laboratories.
Voronezh City Electric Grid, JSC
Currently, MIKO-7MA milli-ohmmeter is used in the electrotechnical laboratory of the equipment repair shop of VCEG, JSC.
This device has been used since May 2021 for testing power transformers with a capacity of 6-10 kV 25-630 kVA. The use of this device made it possible to reduce the time spent on measuring the ohmic resistance of the transformer windings compared to previously used devices.
The use of digital measurement indication allows you to reduce the number of errors when taking readings. Low weight, compactness and absence of fragile parts is an undoubted advantage of the device. During the short period of MIKO-7MA operation, no failures and malfunctions were detected.
Vorkutinskiye thermal power plants, LLC
The electrical laboratory of Vorkutinskaya TPP-2 Vorkutinskiye TPP, LLC T Plus, PJSC has in its instrumental and technical base the following devices manufactured by SKB EP, LLC:
- MIKO-1 micro-ohmmeter that is used since 2005;
- MIKO-10 micro-ohmmeter that is used since 2017;
- PKV/M5N high-voltage circuit breaker analyzer that is used since 2006 with an angular movement transducer DP21 and a linear movement transducer DP12;
- PKV/M7 high-voltage circuit breaker analyzer with a PUV-regulator device that are used since 2018, with an angular movement transducer DP21 and a linear movement transducer DP12.
With the help of micro-ohmmeters, electrical laboratory personnel measures DC resistance of contact connections, and PKV/M5N and PKV/M7 devices are actively used to measure the speed and time parameters of circuit breakers of 6, 35 and 110 kV voltage classes.
Micro-ohmmeters are convenient to use due to their autonomy and mobility. PKV/M5N device, despite its long service life, is relevant during the diagnostic of high-voltage circuit breakers (due to the presence of linear and angular movement transducers in the complete set), but, due to moral aging and replacement with new analogues, the device cannot be supplemented with new components. The new PKV/M7 device is supplemented with all the necessary spare parts, is modern, mobile, accurate and, based on this, is more in demand by electrical laboratory specialists.
As a result of the operation of devices manufactured by SKB EP, LLC by the personnel of Vorkutinskaya TPP-2, we can say about the reliability and high-quality operation of the above-mentioned devices and express a desire to continue interaction with specialists of SKB EP, LLC on technical and commercial issues.
Tver Carriage Building Plant, JSC
On behalf of the SSD of TVZ, JSC MW in Moscow we would like to express our sincere gratitude and deep appreciation to SKB EP, LLC for providing digital and modern measurement equipment! Since February 2021, our department has been using MIKO-9A milliohmmeter.
The milliohmmeter is used for diagnostic and detection of turn-to-turn short circuits of traction electric motors and network reactors of electric trains of the EG2Tv "Ivolga" series.
Due to MIKO-9A compactness and lightness, as well as the presence of a built-in battery and the ability to measure the resistance of the conductor under inductive load, the device can be used in space-limited conditions allowing to detect malfunctions without dismantling the trolleys from the car.
During MIKO-9A operation, it was possible to identify a malfunction in 3 traction electric motors with a capacity of 300 kW and two network reactors. And these defects could not be determined by the available measurement instruments of our division.