Reviews

Nowadays, specialists of an electrical laboratory of Udokan copper, LLC operate the following instruments, which are manufactured by SKB EP, LLC: MIKO-9A, MIKO-21 and PKV/M7.

These instruments have been used since 2020 when conducting a comprehensive diagnostic of power and measuring transformers, high-voltage circuit breakers and disconnectors.

We would like to note the universality of MIKO-21, extensive functionality when measuring parameters on electrical installations of 4-220 kV: for example, measuring the contact resistance of metallic bounding equipment with an earthing system, measuring the contact resistance of a contact system of circuit breakers with a voltage class of 6-10 -35-220 kV, measuring the contact resistance of bolted joints of 4-220 kV. Speaking about a specified functionality of the instrument, advantages are revealed both in terms of the cost (instead of several instruments we use one) and in terms of labor costs reducing for carrying out work.

While using MIKO-9A, the following advantages were found: the ability to measure contact resistances of circuit breakers contact system 6-220 kV, measure the ohmic resistance of windings of power and measuring transformers of 6-220 kV with an AUTO 3Ph mode. These advantages can significantly reduce the time for preparing and performing measurements in comparison with instruments of previous generations and produced by other manufacturers.

The instrument PKV/M7 is a reliable device for measuring parameters of circuit breaker VEB-UETM-220 of 10-35 kV manufactured by Elmash, LLC from Yekaterinburg.

Having gained experience in the operation of instruments manufactured by SKB EP, LLC, we can confidently recommend these products for conducting a comprehensive diagnostic of power equipment.

A.V. Sevostyanov
Chief power engineer

A high-voltage circuit breaker analyzer PKV/M7 is operated in the branch Karelian enterprise of the main power networks of FGC UES, PJSC.

During operation, I may note positive operation of the instrument in the diagnostic of such HV circuit breakers as U-220, U-110, VMT-220, VMT-110 and the ease of use.

The instrument measures the speed and time parameters of a HV circuit breaker operation well, carries out simultaneous measurement in three phases. Also it has a wide variety of attachment devices, which help install transducers on different HV circuit breakers and help make a connection with every computer.

The ability to make measurements (triggering) of a HV circuit breaker, as well as the opportunity to obtain results in the specialized software allow to significantly reduce the operation time. A special software helps analyze, predict and eliminate various defects immediately on the spot of operation.

We recommend all companies operating high-voltage circuit breakers and electrical laboratories performing HV circuit breaker diagnostic the usage of these instruments.

R.A. Valiev
Acting First Deputy General Director – Chief Engineer – Deputy Chief Engineer – Chief Dispatcher

Yamalo-Nenets enterprise of the main power networks the branch of FGC UES, PJSC thanks your company SKB EP, LLC for the fruitful cooperation in the supply of measuring instruments for the diagnostic of high-voltage equipment. We also thank you for prompt, professional work and individual approach, as well as for the high quality of instruments and its components.

Our company operates such instruments as MIKO (10 pcs.), and PKV (10 pcs.) manufactured by SKB EP, LLC.

These instruments are used to determine repair quality of high-voltage circuit breakers and disconnecting switches. The contact resistance of the current-carrying circuit, the time and speed characteristics of HV circuit breakers are checked with a help of them.

The instruments are very convenient, they give an opportunity to identify the worsened condition of contact connectors on HV circuit breakers and of disconnecting switches. They reduce the time for detecting a defect and prevent accidents and technological disturbances. The defects are periodically identified. That fact allows us to schedule a necessary repair work on time and maintain the equipment in a good working condition.

We recommend these instruments for use in organizations, which operate high-voltage equipment.

Thank you for your help in solving our production tasks and sincerely hope for further mutually beneficial cooperation.

S.I.Kandiano
Acting Chief Engineer-Deputy Director

Currently two instruments are operated by the Electrical repair production of Severstal, PJSC: HV circuit breaker analyzers PKV/U3.0 and PKV/M7. According to practical evaluation, PKV/M7 is more convenient to operate than PKV/U3.0.

These instruments we use for high-voltage circuit breakers from 6 to 220 kV.

As for convenient functions, we need to mention the possibility of measuring angular movement and converting to linear. For example, speaking about one of the last cases, an increased contact time difference between the phases of VGBU-220 HV circuit breaker was revealed.

Economic effect calculations of using these instruments have not been carried out by our company.

Taking into account the operating experience of PKV/M7, we can definitely recommend it for use.

V.G.Koryago
Head of the Technical Department of Severstal, PJSC

In 2020 our company purchased HV circuit breaker analyzer PKV/M7 produced by SKB EP (Irkutsk). The delivery of the instrument was carried out on time and in full compliance with contractual obligations. It was organized by the official sales representative in Belarus, NPP Belenergokip, LLC.

During operation, the instrument is used to diagnose HV circuit breakers up to 6-10 kV such as VV/TEL, RiM-VV, etc. The user-friendly interface as well as the wide functionality of PKV/M7 allows you to conduct a full range of diagnostic work quickly and effectively and identify equipment malfunctions at early stages.

We can notice the simplicity and reliability of the instrument, there are no facts of its incorrect operation, technical and software malfunctions. NPP Belenergokip, LLC specialists has been providing promptly the qualified support concerning supply and technical operation issues of above mentioned instruments.

S.B.Kireev
Director