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SPECIAL DESIGN BUREAU
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ENGINEERING
Certificates
PKV/М7 is designed for measuring characteristics of SF6, oil, magnetic-type and vacuum high-voltage circuit breaker of all types and manufactures (such as ABB, AREVA, ALSTOM, SIEMENS etc.), and of isolators and short-circuiting devices.
Additionally, PKV / M7 allows you to register instantaneous values of currents and voltages of control electromagnets.
PKV/M7 instrument is complete with attachment devices for the installation of measuring transducers on all types of Russian and foreign-manufactured (ABB, AREVA, ALSTOM, SIEMENS, etc.) high-voltage circuit breakers.
Adaptability of the instrument involves designing of transducer attachments to the circuit breakers and receiving of transfer function of movement from the shaft to the cross-arm. Transfer functions of kinematic chains of all circuit breakers are stored in the memory of the instrument. Adaptation work began with the first produced model of the instrument (PKV/М1) in 1995 and continues to this day.
For example, in similar devices, a shorter time range does not allow testing circuit breakers in complex cycles.
There are many nuances when taking measurements on circuit breakers. It is easy to register time characteristics for any type of circuit breakers, but special sensors are required to obtain stroke and speed characteristics.
Incremental (discrete) type sensors are supplied together with the PKV/M7 device for measuring speed characteristics and stroke parameters. They do not require adjustment or customization of conversion factors. Moreover, the sensors are accurate and easy to use.
For example, devices with cable-type sensors have a limit on the upper-speed value. The return spring does not have time to wind the cable onto the drum with rapid changes in speed. The inaccuracy of measurement increases. The use of laser displacement sensors is not advisable because of the danger of eye damage from the laser beam during rough handling. In addition, the installation of the laser sensor is made approximately without clamps. This leads to a high inaccuracy of the measurements.
For measuring speed and stroke parameters high accuracy of measurements of time characteristics (±0.1 ms), travel and speed characteristics is ensured with digital angular and linear movement pickups with resolution in 0,09° and 0.5 mm.
Often used in other devices (analogs of the PKV/M7 device) sensors based on a potentiometer even under normal conditions have a large (up to ± 1%) inaccuracy. For example, with a maximum stroke of 900 mm, such an inaccuracy gives an uncertainty of ± 9 mm.
The diagnostic results are displayed in a table with measured and calculated parameters for each cycle operation (when processing measurement results for complex cycles, the device automatically breaks down the cycle into simple operations). The tables provide such data as:
Apart from tables with measured parameters, more detailed information on breaker status can be derived from registrable graphs that are navigated using cursors and scaling.
The instrument registers:
The type of graphs is determined by the state of all links (levers, springs, rods, axles, traverses, dampers, etc.) of the kinematic chain of the mechanism that controls the closing-opening of the circuit breakers contacts. And the occurrence of a malfunction in at least one of the links (increase in play, loosening of the spring, increased friction, failure of the damper, etc.) changes the form of the graph from the normal form of a working switch immediately. It allows using the in-place method to identify its current or incipient malfunctions at an early stage.
Equipped with a power switchboard to control drives of switching devices, both DC and AC, and enables to perform both simple operations and complex cycles, including life tests.
PKV/M7 is an independent device for diagnostics and data analysis, which does not require third-party equipment.
All settings, calculations and graphics are on a graphic b/w LCD display (320x240).
If you have to carry out diagnostics in difficult weather conditions you can be sure that PKV/M7 will provide you with the most accurate results as it operates properly in the temperature range from -20 to +40°С.
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Instrument and accompanying documents: operation manual, record book, software / user manual. |
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For measuring of moving parts’ movement in high-voltage circuit breakers (set includes data sheet and calibration certificate). Range – 0 ÷ 900 mm. Resolution – 0.5 mm. Used together with a measuring stick. |
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Measuring stick in a box. Used together with linear movement transducer DP12 (length – 700 mm // on order – 550 mm and 1,000 mm). |
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For measuring of shaft turn angle in high-voltage circuit breakers (set includes data sheet and calibration certificate). Measuring range – 0 ÷ 360°. Resolution – 0.09°. |
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For connecting linear (DP12) or angular (DP21) movement transducer to the instrument. Cable insulation – silicone (length – 7 m // on order – 12 m). |
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For connecting to the pole of high-voltage circuit breaker. Equipped with alligator type end caps. Cable insulation – silicone. Throat Ø - 30 mm (length – 11 m). |
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For remote start of measuring processes of the instrument. Connected to the drives of high-voltage circuit breaker electromagnet. Rubber insulation (length – 5 m). |
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For connecting to the high-voltage circuit breaker drive. Equipped with alligator type clamps. Rated current – 50А. Cable insulation – silicone (length – 2.5 m). |
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For commutated voltage supply. Rated current – 50А. Cable insulation – silicone (length – 2 m). |
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For measuring resistance in the range between 0 ÷ 240 Ohm and 0 ÷ 2.5 kOhm. Equipped with M5 screw end caps (length – 2.5m). |
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For attachment of DP12 and DP21 transducers to various Russian-manufactured high-voltage circuit breakers (clamps, boards, connector adapters, etc.). |
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For connecting the instrument to the power line. Temperature range – 25°С ÷ +45°С. Rubber insulation (length – 2 m). |
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For PKV/M7 case grounding. Equipped with a ground clamp and screw end cap. Rated current – 50А (length – 1.75 m). |
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For connecting the instrument to the computer network or notebook (length – 2 m). |
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For connecting to the drive of the high-voltage circuit breaker in case it is not convenient to connect to the screws of the drive strip through alligator type end caps. |
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For power source protection (2 + 2 pcs.). |
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Measuring stick in a box. Used together with linear movement transducer DP12 (length - 550 mm or 1,000 mm // 700 mm in standard complete set). |
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For connecting linear (DP12) or angular (DP21) movement transducer to the instrument. Cable insulation – silicone (length – 12 m // in standard complete set – 7 m). |
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For measuring voltage in the range between 0 ÷ 12V and -6 ÷ +6V. Equipped with М5 screw end caps (length – 2.5 m). |
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Power cable adapter with a rectifier up to 32А (embodiment 2). Connecting to the network with a europlug. Temperature range: -25ºС ÷ +40ºС (length – 2 m, 5 m, 10 m). |
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For measuring linear movements of moving parts of vacuum circuit breakers with open insulating housing in the range of 25 mm. Includes: |
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For measuring currents of electromagnets and solenoids. Supplied complete with a coupler. Current of up to 600А (cable length – 2.5 m). |
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For attaching of DP21 angular movement transducer to SF6 circuit breakers manufactured by Siemens, ABB, Areva, etc. |
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Mounting fixture for high voltage circuit breakers Schneider Electric Evolis, Susol VL-06. |
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Mounting fixture for high voltage circuit breakers Schneider Electric Evolis, Susol VL-06. |
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Mounting fixture for high voltage circuit breakers Schneider Electric Evolis, Susol VL-06. |
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For connecting the instrument to the computer network or notebook (length - 1.5 m). |
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For installation of DP21 linear movement transducer on VE or VES type (or other type) high-voltage circuit breakers. |
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Installed instead of housing below the drive for fixing of DP12 linear movement transducer to VGU and similar type high-voltage circuit breakers. |
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Installed on the axis of the main movable contact of VE or VES type high-voltage circuit breakers. After that DP21 linear movement transducer is attached to the brackets. |
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To install the angle sensor DP21 to the high-voltage switch VBP-10 and the similar. |
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For PKV/М7 control from computer as well as for measurement data processing in a special program. |
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The rod is designed to ensure convenient connection to contacts of a HV circuit breakers.
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Open Original
In the Eastern Electrical Grids the branch of IPGC, OJSC we have been using the following devices manufactured by SKB EP, LLC:
PKV/M7 circuit breaker analyzer proved to be reliable, there was not a single case of failure. The device allows to measure several parameters in one measurement cycle, which significantly reduces the total time spent on assessment of the circuit breaker technical condition. The ability to use local and remote start expands the application area of this instrument.
MIKO-1 microohmmeter has established itself as a simple, unpretentious in use, but quite accurate device. It is compact, and its test cables are flexible, therefore the work might be done even at low temperatures.
MIKO-2.3 device is easy to use due to its small size. The device is equipped with a convenient and useful carrying bag in that you can put all the accessories and test cables. Additionally, we purchased test cables of different lengths and different other accessories that made it easier to work with the device on various equipment. During the use of the device, no failures in its operation were detected.
We express our gratitude to SKB EP, LLC for the production of high-quality and reliable devices and we recommend the use of these devices to companies of various activity types.
Open Original
To date, the following devices are in operation in the electrotechnical laboratory of the Yaroslavl Power Supply Distance of the Northern Energy Supply Directorate: MIKO-2.3, MIKO-7, PKR-1 and PKV/M7.
These devices are used in conducting a comprehensive survey of electrical equipment of substations, such as power and converter transformers, high-voltage circuit breakers, and disconnectors. During the tests, SKB EP devices gave a good account of their reliability, stability of operation, and ease of use. When using the above-mentioned devices, total measurement time was reduced.
The use of PKR-1 OLTC analyzer made it possible to more accurately determine the defects of the power transformer and tap changing device during a comprehensive check-up. The most frequently diagnosed damages are burning and adjustment of the contactor contacts of the tap changing device. The second most common defect is the burning of circuit breaker contacts. One of these defects was confirmed by the visual inspection.
The use of MIKO-2.3 and MIKO-7 devices that are dedicated to the resistance measurement in inductive circuits gave the greatest reduce of measurement time. When using an AC bridge, one resistance measurement of the 110 kV transformer winding lasted about 1.5 minutes. When using MIKO-2.3 or MIKO-7 devices, the time spent on one measurement was reduced to 30 seconds.
PKV/M7 circuit breaker analyzer is used for a comprehensive assessment of the state of high-voltage circuit breakers. As the main direction was chosen the assessment of SF6 circuit breakers of MKP-110 type. There is a big survey conducted of SF6 circuit breakers installed instead of oil circuit breakers. The use of PKV/M7 circuit breaker analyzer has reduced the time spent on the diagnostics of circuit breakers, and increased the accuracy of the data obtained. Previously, the measurements of the moving parts movement and compression were controlled by a ruler with oil drained from the circuit breaker tank. PKV/M7 circuit breaker analyzer is, first of all, more comfortable to use and has better accuracy comparing to the previously used methods.
Having experience in the operation of SKB EP devices since 2016, we can definitely recommend the use of these devices for diagnostics of energy facilities.
Open Original
We have been using the devices MIKO-2.3 (2 pcs.), PKV/M7 (1 pc.) and MIKO-1 (1 pc.) in the Vakhsky district of Nizhnevartovsk electrical networks.
We have been working with your devices for more than 10 years on the following types of high-voltage switches: VGB-35 (6-110kV), S-35 (with the drives SHPE-12 and PP-67), VMT-110, VGT-110, transformers TM (6-10 kV), TMG (6-10kV), and various types of disconnectors with the voltage 6-220 kV.
All the devices are quite convenient to use.
With the help of your devices, we have detected a lot of equipment malfunctions.
The accuracy of the results compared to similar devices of other manufacturers is at a high level. I can sincerely recommend your devices to other organizations.
T. N. Ratnikov
Chief Foreman of the Vakhsky District of Nizhnevartovsk electrical networks
Open Original
The electrotechnical laboratory of Kanskaya CHPP, JSC has used the following devices of SKB EP, LLC in operation: MIKO-1 (since 2009); PKV/M7 and PUV-regulator (since 2016).
These devices are used to measure and diagnose oil circuit breakers, vacuum circuit breakers; load-break switches; measurement of transient resistances of contact connections of disconnectors, busbars.
MIKO-1 microohmmeter has optimal overall dimensions, easy and convenient to use. This device is equipped with a built-in battery, which makes it easier to use it even on the high objects. The disadvantage of this device is the inability to work while charging and the inability to connect power bank when working in the field.
[Manufacturer note]: MIKO-1 was developed more than 20 years ago, when the ability to connect to a power bank, as well as the ability to work when charging from mains, weren’t so widespread and necessary. These disadvantages are eliminated for our more modern microohmmeters MIKO-10 and MIKO-21. At the same time, we also would like to note that the built-in battery is safer from the point of view of the device's safety than the external one, and makes it possible to conduct diagnostics and measurements even when the device can’t be connected to the network. If your MIKO-1 runs out of power quickly, we recommend you to replace the battery in the device by yourself (we can send you instructions).
We also equipped the crocodile-type measuring clamps with measuring forks, which allows to take measurements faster.
[Manufacturer note]: As regards the additional supply of the measuring terminals with measuring plugs by yourself, we would like to note that it may affect the condition of the cables and the accuracy of the measurement results. In the additional configuration of MIKO-1 (you can learn more about them in the section Complete set) there are measuring cables with with spring loaded needle-type contacts (art. SKB018.13.00.000 and SKB018.17.00.000), which can be used for measuring transient resistances in hard-to-reach areas of any objects with painted or dirty surfaces.
The devices PKV/M7, PUV-regulator also proved its great quality. They are convenient and easy to use, and what is more, they have high measurement accuracy. The devices allow you to measure a number of important parameters in one cycle (time diversity, compression, speed, etc.), which significantly cuts the processing time and assessment of the technical condition of the switch. The complete set of the device is sufficient for carrying out work on the equipment operated by us.
The devices of SKB EP LLC have proven themselves positively in terms of operation, accuracy and speed of measurements. Their use can significantly save time for diagnostics of electrical equipment and improve the quality of service.
We express our gratitude to SKB EP LLC for high-quality and reliable products and recommend these devices to organizations engaged in the repair and operation of equipment.
V. N. Vladimirov
Director
Open Original
Since 2006, Tulenergo the branch of IDGC of Center and Volga region, PJSC, has been using devices PKV/M6, PKV/M7, MIKO-1 and PKR-2M manufactured by SKB EP, LLC.
PKV/M7 and MIKO-1 have become irreplaceable assistants in diagnostic of high-voltage switches the following types: VMG-133, VMP-10, VK-10, VBM-10-20, S-35, VT-35, VGBE- 35, MKP-110, VGT-110. PKR-2M is used to accurately and quickly assess the state of the switching device of power transformers.
All devices are reliable, convenient and easy to use thanks to the clear interface and small dimensions.
We express our gratitude to SKB EP, LLC for the production of high-quality and also we recommend devices of the company to organizations involved in the installation, debugging, operation and repair of electrical equipment.
Churakov A.V.
Commissioning and testing engineer of Diagnostic Service
Odinets A. A.
Acting head of Diagnostic Service
Open Original
Specialists of Irkutsk HPP (hydro power plant) have been using the SKB EP instruments for several years. The PKV/M7 instruments were used for measuring time characteristics of moving parts of such circuit breakers as ABB HGI-3 (13.8kV), AREVA HGF-1012 (110kV), SIEMENS 3AP1DT-145 (110kV, 220kV), and 3AP1DT-245 (220kV); the MIKO-2.3 and MIKO-7 instruments are used on electric motors (0.4kV) and the RVR(Z)-20/2000 M-U3, RGNP-110/2000-50UHL1, RDZ-1-110-2000UHL1, and RNDZ-220/2000U1 (13.8/110/220kV) disconnecting devices.
The PKV/M7 instrument meets all our needs in HV circuit breaker diagnosis. It provides convenient control of poles time difference using the PC software that shows defects in a circuit breaker long before they may cause a heavy failure.
The MIKO-2.3 milliohmmeter provides quick output of the results of measurements; it is a universal instrument that integrates four modes in one. The instrument is rather convenient and mobile. But for some circuit breaker models the length of a cable for the milliohmmeter mode is not quite sufficient for convenient instrument manipulation. Battery charge for ‘microohmmeter with account of a current transformer’ mode is sufficient for one measurement only, which extends the diagnosis time, but the instrument has an option of fast battery charge.
The MIKO-7 in the course of operation proved to be rather efficient. The only drawback is non-reliable "crocodile" clips. The instrument has a robust shock-proof housing that “saved” the instrument many times.
The updated software of the milliohmmeter allowed us to save time and eliminate personnel’s mistakes. When we used a voltampermetre we had to carry several instruments, and a battery; their assembly took time, and measurements on a transformer took two hours minimum. Time of measurements using the MIKO-7 is halved or even makes one third of that.
Benefits of the PKV/M7 include: information on the results of measurements and ability to operate the circuit breaker from the instrument. The MIKO-2.3 is rather mobile; the MIKO-7 has a large set of functions and automatic mode of operation.
During the SKB EP instruments operation on the main electric equipment of the plant we did not face any problems, the instruments worked properly, without failures. On the auxiliary equipment the problems with electric motors were timely revealed (inter-winding short circuit, break of windings end).
Specialists of Irkutsk HPP recommend the PKV/M7, MIKO-2.3 and MIKO-7 to all the companies as they are cost-effective analogues of the instruments of foreign manufacture.
Open Original
The PKV/M7 Instrument is used in MES of East for measurement of time characteristics of moving parts of the U-220, and MKP-110 circuit breakers.
The PKV/M7 Instrument meets all our needs in HV circuit breaker diagnosis. It provides convenient control of poles time difference using the PC software that shows defects in a circuit breaker long before they may cause a heavy failure.
The instrument allows early identification of misalignment of a drive and contact system (squeeze, time of contact system delays, bounce) in the circuit breakers. Early detection of these developing faults eliminates costly repair of a contact system of a circuit breaker.
Open Original
A set of the PKV/M7, MIKO-2.3, and PKV-35 instruments manufactured by SKB EP has been in use at Balakovoatomtechenergo since 2011.
During their operation the instruments proved to be rather efficient.
The PKV/M7 instrument meets all our needs in the HV circuit breaker diagnosis. It provides convenient control of poles time difference using the PC software that shows defects in a circuit breaker long before they may cause a heavy failure; the function of graphs overlapping is also rather convenient.
The PKV-35 instrument is used for measurement of minimum voltage of circuit breakers. It operates perfectly.
The MIKO-2.3 MikroMilliKiloOhmmeter is characterized by universal nature (four modes in one) and high accuracy of measurements. The instrument is rather functional and convenient in use.
Specialists of JSC ATOMTECHENERGO recommend the PKV/M7, MIKO-2.3, PKV-35 instruments to all the companies dealing with electric equipment maintenance, adjustment and operation in the electric networks.
Open Original
At the end of 2014 the Kostroma Energy College procured the PKV/M7 instrument for HV circuit breaker control, and the MIKO-1 microohmmeter manufactured by your company. The instruments are used for training the students of electro-technical department in the college workshop for HV circuit breaker maintenance. These instruments are used for maintenance and diagnosis of HV live-tank circuit breakers of VMP-110, VMPE-10, VKE-10, and VMG-10 type, and for vacuum circuit breakers of VBM-10, and VBES-35 type.
The instruments are rather compact and have light weight. The PKV/M7 instrument allows measurement of the main parameters of HV circuit breakers, and early detection of defects without circuit breakers disassembly. The PKV/M7 has special software for PC. The instruments are simple in operation and can be used on the site of a circuit breaker under repair.
Use of these instruments allows us to train students in the modern methods and technologies for HV equipment diagnosis.
These instruments will be also used for advanced training of the personnel of MRSK Center of Kosctromaenergo Company in the Advanced Training Center of the College.
Open Original
The PKV/M7 instrument for HV circuit breaker testing that was manufactured by SKB EP Company (Irkutsk) has been used by KARAGANDAENERGOREMONT since 2015. The instrument was used by electrical laboratory for controlling the performances and revealing the faults in the 220kV oil circuit breakers of MKP-35, MKP-110, MKP-220, U-110, U-220 types.
During operation the instrument proved to be rather reliable, convenient and safe. Its main merit is ability to control a large number of performances of a circuit breaker, to display the information obtained, to download it on an external carrier for further analysis on the PC. An in-built block for drive control raises its mobility and contributes to its compactness.
With the help of the PKV/M7 instrument for HV circuit breaker testing our specialists identified the following faults in the electric equipment: divergence of time commuting characteristics from passport values; unbalance between commuting phases in oil circuit breakers of MKP-35, MKP-110-5, and MKP-110M type.
Ability to perform on-line testing of circuit breakers without involving third party companies is rather cost-effective for our company. We also did not lose time on making reports about faults.
Judging from our experience, the PKV/M7 instrument is the most convenient tool for analyzing the performances of HV circuit breakers. We recommend it to all the companies dealing with maintenance and installation of high-voltage commuting equipment.
We offer to consider the features of diagnostics using automatic monitoring systems (transducers) in real operating conditions and using specialized portable devices produced by SKB EP LLC, which require disconnection of voltage coming to the measured object, by the example of a high-voltage circuit breaker.
21 may 2020
A distinctive feature of the SKB EP instruments is the ability to diagnose a circuit breaker without disassembling it, without draining the oil and disconnecting the shunt resistors, etc. Theyinspect all the mechanical parts and components of the circuit breaker at once, as well as check several characteristics of the assembly simultaneously.
13 may 2020
In early April, SKB EP specialists have conducted an integrated testing at 110/35/10 "Pivovariha" substation, where the following instruments have been used: instruments for control and testing of high-voltage circuit breakers; instruments for resistance measurement (microohmmeters and milliohmmeters) and instruments for control of transformer OLTCs.
20 april 2019
Unlike conventional oil, vacuum or SF6 circuit breakers, HV vacuum circuit breakers of BB/TEL type consist of two main functional modules: A switch module and a control unit.
21 july 2016
PKV/M7 is an advanced HV circuit breaker analyzer that provides high precision measurements of time, travel, and speed characteristics of moving parts.
PKV/М7 is designed for measuring characteristics of SF6, oil, magnetic-type and vacuum high-voltage circuit breaker of all types and manufactures (such as ABB, AREVA, ALSTOM, SIEMENS etc.), and of isolators and short-circuiting devices. Additionally, PKV / M7 allows you to register instantaneous values of currents and voltages of control electromagnets.
We hope that next time you will be able to participate.
Our manager will contact you shortly to clarify the data.
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