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SPECIAL DESIGN BUREAU
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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: calibration certificate, 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
Since 2008, CEG the branch of Magadanenergo, PJSC has been using the following devices manufactured by SKB EP, LLC: MIKO-1, MIKO-2.2, PKV/M7, PKR-1.
During the use, these devices have proven themselves from the best side.
MIKO-1 and MIKO-2.2 microohmmeters have optimal overall dimensions for performing the operation process on existing electrical installations. These devices are equipped with in-built rechargeable batteries. Availability of this feature significantly facilitates their operation when working at height.
PKV/M7 circuit breaker analyzer and PKR-1 OLTC analyzer are easy to operate and control. And despite all this simplicity the devices have a high measurement accuracy. Their use can significantly save time for diagnostics of electrical equipment and improve the quality of repair.
We express our gratitude to SKB EP, LLC for the production of high-quality and reliable products and we recommend its use to organizations involved in the operation, diagnostics and repair of electrical equipment.
Open Original
In the Ust-Labinsk Electrical Grids the branch of Rosseti Kuban, PJSC are used the following devices manufactured by SKB EP, LLC: MIKO-1 microohmmeter, MIKO2.2 micromillikiloohmmeter, PKV/M7 circuit breaker analyzer.
During their use since 2007, the devices have been showing themselves to be on the good side both in terms of use and in terms of reliability. The devices are convenient to operation due to their small dimensions, built-in rechargeable batteries, and low weight. The devices are equipped with the all the necessary complete set of documents (such as user manual), test cables, fasteners and other accessories to easily start their use. PKV/M7 high-voltage circuit breaker analyzer is simple and convenient in operation. It allows measuring several parameters in one measurement cycle. This feature significantly reduces the time spent for the circuit breaker technical state diagnostics and measurement results processing. Anyway, it would be more convenient and faster to carry out measurements operating by several phases at one time. We see that SKB EP engineers are working in this direction in the example of PKV/M17 that is the next generation of high-voltage circuit breaker analyzers.
We commend SKB EP, LLC for your high-quality devices, and recommend these devices for organizations engaged in the operation and repair of electrical equipment.
Open Original
We would like to inform you that PKV/M7 circuit breaker analyzer and MIKO-1 microohmmeter manufactured by SKB EP, LLC are in operation in the structural department "Central Electrical Grids" the branch of "DRSK", JSC "Amursk region Electrical Grids".
With the help of PKV/M7 circuit breaker analyzer, we can take all necessary time and speed parameters of high-voltage circuit breakers 6-110 kV. The ability to use local and remote start expands the application area of this device. Convenient panel of device control and measurement indication, as well as the use of various types of test cables connectors on the device panel exclude the possibility of personnel faults when connecting test cable to the device or to the equipment.
MIKO-1 microohmmeter is used for resistance measurements of high-voltage circuit breaker contacts. The advantage of MIKO-1 is its autonomous power supply from the in-built battery, the capacity of which allows carrying out a large number of measurements.
All the above-mentioned devices are easy to operate, have a compact design and light weight that allows them to be used directly at the installation site of equipment that has been removed for repair or diagnostics. The high quality of assembly and measurement accuracy of the devices manufactured by SKB EP, LLC improved the control quality of the required parameters during scheduled repairs.
We recommend these devices to all organizations involved in setting up, repairing and operating high-voltage equipment.
Open Original
Upon your request, we would like to inform you that in Kuzbassenergo-RES the branch of Rosseti Siberia, PJSC are operated the following devices: MIKO-21, PKV/M7.
MIKO-21 microohmmeter is used to measure the resistance of the main circuit contacts of the high-voltage circuit breakers and disconnectors in order to detect defects and reduce the likelihood of failure of switching devices caused by an increase of the contact resistance. The convenience of using MIKO-21 is the presence of an in-built battery that makes it possible to carry out measurements autonomously without connecting the device to the network. The battery does not require frequent recharging.
PKV/M7 circuit breaker analyzer makes it possible to control the time difference of the poles with the help of the visual software for a PC. In this software, it is possible to identify defects in an informative and accessible way at the initial stage of the breakdown development that avoids expensive repairs of the circuit breaker contact system.
We recommend these devices for organizations that are engaged in the repair and operation of electrical equipment.
Open Original
ActiveEnergo, LLC employees started to work with PKV/M7 circuit breaker analyzer in 2018. During its operation, PKV/M7 proved to be a good device for monitoring the main parameters of high-voltage circuit breakers. It is convenient that you can process measurement results on a PC and generate protocols. Equally important is the presence of an in-built switchboard, that allows to operate the circuit breaker, and to set compound cycles. The device is built into a very comfortable and robust case. One more advantage of PKV/M7 analyzer is the light weight of the device.
We would like the test cables of the device to be completed with wire spools and / or special cases.
[Manufacturer note]: The question of adding special cases or spools for teh cables to the standard or additional complete set of the device was previously raised in the production department of our company, now we have test samples of spools at our disposal. We can discuss the terms of their provision on an individual basis.
It would also be great, if it is possible to add to the device the functionality of measuring the characteristics of the circuit breaker at the minimum voltage of closing / opening electromagnets or to describe this function in the methodological material, if it has already been implemented.
[Manufacturer note]: An ability to check the characteristics of the circuit breaker at low voltage is not implemented in the PKV-group devices. And when these changes are made, the device will increase in size and weight. Among the devices of our production there is a PUV-regulator, with that you can perform measurements at low voltage in conjunction with the PKV/M7 circuit breaker analyzer.
Considering the above, we would like to recommend PKV/M7 circuit breaker analyzer to be used at power facilities.
Open Original
In 2018, our company purchased PKV/M7 circuit breaker analyzer. The use of this device allows our specialists to assess the condition of the circuit breakers without opening them. This opportunity significantly reduces the labor costs of the repair personnel. We consider graphs such an interesting and useful feature for equipment diagnostics because they can show hidden faults. We also would like to point out the possibility of operating the device autonomously, with subsequent results processing on the computer. One more positive point in use is the color indication and the different structure of the connectors of each cable, as well as the robust case of the device
Among the disadvantages, we would like to mention the absence of the possibility to get measurement procedure in an electronic form that increases the time spent for developing the procedure of circuit breaker diagnostics.
[Manufacturer note]: Our company always stands for active cooperation with the companies that are envolved in the release of new switching equipment. Our technical engineers are often invited to report tests of high-voltage circuit breakers at manufacturers' testing facilities, to supervised installation at measurement objects, as well as to repair actions. We look forward to working with you! We are ready to take an active part in the development of new measurement procedures, as well as in the manufacture and testing of new fixing devices and measurement templates.
In addition, a disadvantage is the size of the crocodiles using which it is not always convenient to connect to the contacts on the terminal panel.
[Manufacturer note]: If you have a need to use a unique cable, we are ready to fulfill such need in accordance with your technical specification.
We can recommend this device to all companies that operate circuit breakers, as well as to mobile laboratories that run circuit breaker diagnostics.
Open Original
Review to PKV/M7 circuit breaker analyzer
In 2019, our company purchased PKV/M7 device. After studying the User Manual that is competently compiled by the specialists of SKB EP, LLC, the engineers of Capital-Stroy Diagnostics, LLC started to run measurements on 110 kV circuit breakers. It is worth noting that VGT-110 SF6 circuit breakers have different design features depending on the manufacturer, however, this was not reflected in the measurement circuit assembly instructions.
PKV/M7 device has shown its best. It provides enough information to determine the technical condition of the circuit breakers, has a convenient interface and is easy to operate.
In particular, we would like to note the good work of the technical support service of SKB EP, LLC that promptly helps to deal with issues that might arose.
We recommend PKV/M7 device to the companies that are involved in operating and diagnostics of high-voltage circuit breakers.
Review to MIKO-9A milliohmmeter
In 2019, our company purchased MIKO-9A device to measure ohm resistances of 110 kV power transformers. After studying the device documentation and carrying out reference measurements (reference resistance is included into device complete set) engineers of Capital-Stroy Diagnostics, LLC started working with MIKO-9A milliohmmeter. Significant advantages and minor disadvantages were revealed while working with MIKO-9A on 110 kV power transformers, in comparison with other similar devices.
Among the advantages, it is worth noting high accuracy of the measurements, large battery capacity, and most importantly, transformer demagnetization function. This feature reduces the time spent on measurements and reduces bulky equipment amount that we had to use previously. User-friendly interface, an ability to connect the cables to all three phases simultaneously, and an ability to run measurements with an automatic switch between the windings by the device itself significantly reduce total operating time and simplify the measurement process.
One of the disadvantages is a long time of windings saturation, despite 10 Amps test current that is supplied to the windings by the device. With each tap switch of the OLTC the device saturates the winding for quite a long time.
[Manufacturer comment]: To check winding resistance of the power transformer with an OLTC it is highly recommended to use Manual measurement mode.
Before measurement start you have to set OLTC to the first or to the last tap, and then start the measurement. Device will magnetize the winding and show resistance value. Then, without measurement stop, you need to switch OLTC to the next tap, and the device will almost immediately display the next resistance value. You must also indicate on the device display that this is the next tap. This method will significantly reduce total measurement time.After resistance measurement on all phases and taps, it is necessary to save the results. All values will be displayed in the archive of this object.
We recommend MIKO-9A milliohmmeter to the companies that are engaged in the operation, repair and diagnostics of electrical equipment.
Open Original
EnergoRazvitie Engineering Center, LLC reports that the MIKO-9A, PKR-2M, MIKO-2.3, PKV/M7 instruments operated by our organization, manufactured and delivered by your enterprise, meet the requirements for them. The equipment and functionality of the devices are provided in accordance with the order.
The MIKO-2.3 instrument and the control instrument for high-voltage circuit breakers PKV/M7 are actively used by our organization in measuring the contact resistance of contacts of high-voltage circuit breakers, disconnectors and other electrical equipment, as well as for monitoring the characteristics of oil, vacuum and gas-insulated circuit breakers.
These devices have a number of positive advantages:
The PKR-2M instrument is used to check the technical condition of all types of on-load tap-changers, both resistor and reactor ones. The device allows you to check the status of the on-load tap-changer using both collapsible and CIP methods. For example, to diagnose on-load tap-changers with current-limiting resistors, it is not necessary to remove the contactor tank cap (DRM method).
The presence of a built-in battery increases its mobility and ease of use. Equipped with long probes and a cable with crocodile clamps, it makes it easy to connect to most on-load tap-changers.
The use of the above instruments allows our specialists to reduce the time of testing and measurement. These devices proved to be positive to use, correspond to the declared characteristics and surpass in many aspects similar devices from other manufacturers.
IC EnergoRazvitie LLC expresses its gratitude for your work invested in the released devices and looks forward to further fruitful cooperation.
Open Original
For more than ten years, JSC PE Elektroapparat has been operating instruments manufactured by SKB EP. These devices are used both in production and in the process of servicing measuring transformers, switchgear, high-voltage switches, disconnectors.
PKV/M7, MIKO-1, MIKO-2.3 instruments are an integral attribute in the work of chief engineers of the warranty service.
The devices of the MIKO group are used to measure the transition resistance of the main electrical circuit of the remote control switches. These tools allow timely, accurate identification of developing defects, reduce the risk of accidents and failures and violations in the operation of high-voltage equipment. Their use allowed to increase the control and quality of diagnostics during commissioning and repair work.
The PKV/M7 high-voltage circuit breaker monitoring instrument has established itself as the best domestic measuring instrument for monitoring the main parameters of high-voltage circuit breakers during operation.
The main advantages of PKV/M7, MIKO-1, MIKO-2.3 instruments are:
Considering the above, we confidently recommend these devices for test-services and organizations involved in the production, commissioning, repair and operation of high-voltage equipment.
Open Original
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 2016We hope that next time you will be able to participate.
Our manager will contact you shortly to clarify the data.
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