Milliohmmeter MIKO-7M(A) new version

Since 2015, in the electrical laboratory of Engineering solutions and technologies, LLC has being used a device from another manufacturer to measure the ohmic resistance.

Since 2017, due to the laboratory expansion, MIKO-7 milliohmmeter was purchased that is manufactured by SKB EP, LLC. The reason for the purchase of MIKO-7, and not its analogue that has been properly working, was the measurement speed that made it possible to measure ohmic resistance on power transformers from 6 to 10 times faster. An inconvenience of MIKO-7 was the absence of an in-built battery.

In 2019, it became necessary to purchase one more device for DC resistance measurements.

Having considered the offers on the market, the choice was made in favor of MIKO-7MA, because:

1. MIKO-7 proved to be excellent in its work.
2. MIKO-7MA got rid of the drawback of the previous generation SKB EP milliohmmeters, namely, it got an in-built battery.

In practice, MIKO-7MA device perfectly copes with the assigned tasks. According to the subjective feeling of our engineers, MIKO-7 screen is a bit more convenient than the screen of MIKO-7MA. At the same time, MIKO-7MA has pleased our engineers with the in-built function of automatic measurement stop that was previously supplied to MIKO-7 devices for an additional payment.

MIKO-7MA milliohmmeter manufactured by SKB EP, LLC can be surely recommended for other organizations.

Moreover, the specialists of our company noted the comfort of working with SKB EP, LLC, attentive attitude towards customers and established feedback.

Our company has been operating MIKO-7MA milliohmmeter manufactured by SKB EP since 2019.

Energoseti Sibiri, LLC is involved in taking measurements on objects both inductive and non-inductive, and, therefore, we needed a device that enables such measurements. The price of the complete set is also a key. MIKO-7MA met all criteria. We were pleased with the strength of the cables, the presence of an in-built battery, the speed of measurements and the ease of device transportation. One more advantage is the lower limit of resistance range measurement of 1 µΩ.

The device perfectly copes with the assigned tasks. We can recommend MIKO-7MA milliohmmeter to other companies that are working in energy and other industries.

The companies of our group successfully use MIKO-7MA milliohmmeter. The device has a modern interface and is very easy to use. Another advantage of the device is its portability. The device copes perfectly with the assigned tasks. We can definitely recommend MIKO-7MA milliohmmeter to all companies operating, repairing and diagnosing high-voltage circuit breakers and transformers.

Considering the above, we are ready to recommend MIKO-7MA for other companies, whose main criteria are the presence of an in-built battery, and the reliability of the device and the cables.

1. What device do you use (number of devices used)? For how long?
We have been using MIKO-7MA milliohmmeter for 1 month.

2. What equipment do you check with the devices manufactured by SKB EP, LLC?
Power transformers, current transformers, voltage transformers, etc.

3. How convenient is it to use the device?
It is very convenient to use MIKO-7MA, the device itself is very easy to use.

4. What functions of the device do you consider the best?
Very fast measurement of the resistance.

5. What problems or malfunctions were detected using the device? On what kind of high-voltage equipment?
A fault of the power transformer winding was detected.

6. Specify the economic effect you received from using the device: the number of detected faulty objects from the entire list of diagnosed equipment, the number of saved man-hours when working with the device compared to using old methods of measurement, etc.
This device takes less time to measure the parameters of electrical equipment, thereby its use causes a positive economic effect.

7. Can you recommend our devices to other organizations?
Yes, we will recommend it.

MIKO-7M milliohmmeter has been used by FSFI CSM of Novosibirsk region since 2019.

The device has a clear-to-understand software and user-friendly interface. Furthermore, the device itself is easy to use in measurements.

Stated characteristics of the device are fully confirmed in practice.

The advantages of MIKO-7M are its compact size, light weight and the ability to work from the network.

In addition, the device has shown good repeatability of the results, a wide range of resistance range, and ability to adjust test current manually.

We recommend MIKO-7M milliohmmeter manufactured by SKB EP, LLC for use in specialized enterprises.

Our company has been using the MIKO-7M microohmmeter since May 2020.

A positive point device using in a production environment is protection against external mechanical influences and adverse weather conditions. In our work, it is necessary to carry out a large number of measurements of a 35 kV transformer with a power of up to 1600 kVA. For these needs, the specialists selected MIKO-7M and MIKO-8M instruments, however, given the clearly defined testing mechanism, the MIKO-8M functionality was redundant for us. An important role in choosing a device was played by price and, due to these factors, a decision was made to purchase MIKO-7M.

The instrument copes with its tasks good, we can recommend it for use by other companies.

Upon request for feedback on the use of the device manufactured by your enterprise, we inform you that the MIKO-7 milliohmmeter was used at FSUE PO October, the operating time was 1 year.

With this device, the transition resistance of the contact areas and the grounding of the product bodies was checked.

In operation, the instrument is convenient, it is possible to connect the device to a computer and control it from a computer, it is possible to save the measurement results. But there is a drawback: it is inconvenient to take measurements on pads less than 20x20mm (there is no repeatability of measurements, a large measurement error) [Manufacturer comment: the main purpose of the MIKO-7 milliohmmeter is to measure the inductive resistance, therefore, for the work described above, we recommend microohmmeters produced by SKB EP].

This device can be recommended for electrical equipment maintenance work to check the equipment grounding, transient resistances, connector and adapter pads [Manufacturer comment: to carry out these works, we recommend  microohmmeters produced by SKB EP].

Since June 2017, the MIKO-7 instrument has been used to conduct cable and drives acceptance tests. Previously, another device was used for these purposes.

The MIKO-7 instrument has a modern interface and it is convenient in work. The advantage of the device is also its mobility. The use of this device allowed us to reduce the time allotted for acceptance tests of cables produced by our company.

On October 21, 2019, SKB Electrotechnical Instrument Making LLC, in a classroom at the Novo-Sverdlovsk Thermal Power Plant, conducted a demonstration and demonstration measurements for MIKO and PKV instruments to employees of the electrotechnical laboratories of several stations of the PJSC T Plus Sverdlovsk branch of "Novo-Sverdlovsk CHP.

The measurements were performed on the VGM-20 circuit breaker in conjunction with representatives of SKB EP: Konstantin Muravin, Gennady Kurov, Natalia Korneeva. The following devices were demonstrated: the MIKO-21 microohmmeter (transition resistance of the contacts was measured) and the control device for the high-voltage circuit breakers PKV / M7 (the characteristics of the stroke, speed, time, and also the timing of the contacts were taken).

On 6 kV 5DV-A motors, designed to measure the active resistance of DC windings, the operation of millimeters MIKO-7M (A) and MIKO-9A have been shown.

Instruments have proven themselves on the good side in terms of operation and accuracy, as well as measurement speed. We recommend them for purchase and operation.

The instrument was purchased for checking the validity of our products in a production workshop - current and voltage measuring devices in the I-TOR high-voltage network with a rated voltage of 35, 110kV, rated current of 100-600A, namely: measuring the DC resistance of the current circuit of the device. All equipment diagnosed within a month has shown its serviceability - 12 phases of I-TOR-110kV and 6 phases of I-TOR-35kV.

Some features of the MIKO-7 device can be identified: