Reviews

To date, the following instruments are in operation at the Lower Volga PMES: PKV-3, PKV-M7, MIKO-2.3.

This equipment is used to monitor the technical condition of high-voltage circuit breakers and disconnectors. During practical use, no serious shortcomings or substandard components were identified that would make the use impossible.

The use of MIKO-2.3 compared to traditional methods of measuring ohmic resistance reduces the time for conducting a single measurement, and the digital indication of measurement results eliminates errors when reading the result. Light weight, absence of fragile parts, ease of use, convenient carrying bag for transportation from one site to another are the main factors that determined our choice.

High-voltage circuit breaker controls are used during scheduled maintenance. The use of PKV reduces the time for diagnostics and increases the accuracy of the obtained data.

V.N. Shvetsov
Deputy Director – chief engineer

The MIKO-21 is supplied in a convenient, solid case and has a small weight. The menu is simple and intuitive. In the operation additional spring-loaded needle cables and measuring cables with a clamp were purchased, which expanded the possibility of using this instrument.

In winter, when operating the instrument, there is one nuance: the instrument works well at sub-zero temperatures, but the battery is charged only at positive ambient temperatures. What requires special attention when using the device in cold weather.

In general, MIKO-21 has proven itself positively in terms of simplicity, accuracy, and speed of measurements. The instrument has many measuring cables that can be selected for various tasks. An additional advantage is a shunt to check the operability at any time.

Tishkov I.V.
Lead commissioning engineer Electrical equipment LLP "KKTS"

To date, the Substation Service of LLC "BCS" has several instruments manufactured by LLC "SKB EP", namely: two micro-ohmmeters MIKO-1 and two MIKO-10.

Thanks to many years of successful use of these instruments, we can confidently state that busbar contacts under maintenance are reliable, and that various types of disconnectors and circuit breakers function properly.

The MIKO-10 microohmmeter has established itself as a compact and reliable instrument, and the ability to attach it to the arm and automatic measurement function has made it indispensable for testing disconnectors and bus sections of 35-110 kV.

The measuring current of 50 Amperes allowed the successful use of MIKO-1 microohmmeter for diagnosing contacts of high-voltage circuit breakers of 6-35кВ both oil and vacuum, and the length of the measuring cables allows comfortable use of the instrument for measuring the contact resistance of 110 kV gas-insulated circuit breakers.

The main advantage of using existing micro-ohmmeters is the speed and accuracy of measurements, as well as the mobility, because connection to a 220 V network is not required.

A.B. Borzenko
Head of the Substation Service LLC "BSK"

Currently, SPO Arctic, JSC uses three types of measuring instruments manufactured by SKB EP, LLC: low/high resistance meter MIKO-2.3, micro-ohmmeters MIKO-1, milli-ohmmeter MIKO-8 (six pieces in total). For more than 10 years, these measuring instruments have been operated at a manufacturing facility without complaints.

With the help of MIKO-2.3 and MIKO-8, the ohmic resistance of windings of DC and AC electric machines with a capacity of up to 500 kW is measured, as well as the ohmic resistance of rheostat stages. The measuring instruments are quite convenient and functional in operation. The presence of a built-in battery (MIKO-2.3) allows you to take measurements distantly. Light weight simplifies transportation (carrying).

I.L. Grigoriev
Chief metrologist

One MIKO-10 has been in operation at the plant of cars on B0 platform since April 2021. In operation of the instrument, no operational shortcomings have been identified to date.

The main advantages of the instrument are its compactness, reliability, and necessary functionality. The ability to place the instrument on the hand or belt, as well as the automatic start mode, reduce the time required for measurements.

The instrument is supplied with a full set of documents, which in turn allowed the device to be registered for metrological accounting in our production in the shortest possible time.

MIKO-10 was purchased due to the need for operational measurements of transitional electrical resistance to direct current under operating conditions. The main purpose of the instrument in welding is to conduct a comprehensive assessment of contacts of the secondary circuit of welding equipment, and as a result, to implement timely actions aimed at improving the quality of the welding of parts.

Silchenko I.A.
Deputy Chief of shop manager bureau