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PKV/M7 is designed for monitoring time, travel, and speed parameters of moving parts of oil, vacuum, SF6, and magnetic-type circuit breakers of all types, as well as for monitoring time parameters of isolators and short-circuiting switches.
Additionally, PKV/M7 allows you to register instant values of currents and voltages of control solenoid.
PKV/M7 instrument is complete with attachment devices for the installation of measuring transducers on all types of high-voltage circuit breakers (ABB, AREVA, ALSTOM, SIEMENS, Susol, etc.).
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 a lot of nuances when taking measurements on circuit breakers. It is easy to register time parameters for any type of circuit breakers, but special transducers are required to obtain travel and speed characteristics.
Incremental (discrete) type transducers are supplied together with the PKV/M7 device for measuring speed characteristics and travel parameters. They do not require adjustment or customization of conversion factors. Moreover, the transducers are accurate and easy to use.
For example, devices with cable-type transducers 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 measurement error increases. The use of laser movement transducers is not advisable because of the danger of eye damage from the laser beam during rough handling. In addition, the installation of the laser transducer is made approximately and without clamps. This leads to a high error of the measurements.
For measuring speed and travel parameters, high accuracy of measurements of time parameters (±0.1 ms), travel and speed characteristics is ensured with incremental (discrete) angular and linear movement transducers with a resolution of 0.09° and 0.5 mm.
Transducers that are often used in other devices (analogues of PKV/M7 device) are based on a potentiometer. And even under normal conditions they have a large error (up to ±1%). For example, with a maximum travel of 900 mm, such an error 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 circuit breaker status can be derived from recorded 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, axes, traverses, dampers, etc.) of the kinematic chain of the mechanism that controls the closing / opening of the circuit breaker 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 circuit breaker immediately. It allows to identify its current or incipient malfunctions at an early stage by using a non-demountable method.
PKV/M7 is equipped with a power control module 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 diagnostic and data analysis, which does not require third-party equipment.
All settings, calculations and graphics can be performed on a graphic b/w LCD display (320 x 240 pixels).
If you have to carry out diagnostic 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 -15°С to +40°С.
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Instrument and accompanying documents: Calibration Certificate, User Manual, Log book, software. |
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For measuring the movement of moving parts in high-voltage circuit breakers. Range – 1 - 900 mm. Resolution – 0.5 mm. To be used together with a measuring stick. |
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Measuring stick in a case. To be used together with linear movement transducer DP12 (length – 700 mm // on order – 550 mm and 1,000 mm). |
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For measuring the angle of shaft turn in high-voltage circuit breakers. Measuring range – 0.2 - 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 crocodile clamps. Cable insulation – silicone. Jaw Ø - 30 mm (length – 11 m). |
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For remote triggering of measuring processes of the instrument. Cable should be 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 crocodile clamps. Nominal test current – 50 А. Cable insulation – silicone (length – 5 m). |
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For commutated voltage supply. Nominal test current – 50 А. Cable insulation – silicone (length – 2 m). |
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For measuring resistance in the range between 0 - 240 Ω and 0 - 2.5 kΩ. Equipped with M5 screw end caps (length – 2.5 m). |
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For attachment of DP12 and DP21 transducers to various high-voltage circuit breakers (clamps, boards, connector adapters, etc.). |
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For connecting the instrument to the power supply. 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. Nominal test current – 50 А (length – 2 m). |
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For connecting the instrument to the computer network or laptop (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 with crocodile clamps. |
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Type: VP2B-1V-2А (2 pcs.) / VP2B-1V-10А (2 pcs.). For the power source protection. |
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Convenient, robust, wear proof bag for transportation of cables, documentation and other accessories to PKV/M7 instrument. |
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Measuring stick in a case. To be 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 - 12 V and -6 - +6 V. Equipped with М5 screw end caps. Rubber insulation (length – 2.5 m). |
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It is required for DC drive control of high-voltage circuit breaker at the local triggering. Power cable adapter with a rectifier up to 32 А (modification 2). Connecting to the network with a europlug. Temperature range: -25ºС - +40ºС (length – 5 m, 10 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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Attachment device for high-voltage circuit breakers Schneider Electric Evolis, Susol VL-06. |
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Attachment device for high-voltage circuit breakers Schneider Electric Evolis, Susol VL-06. |
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Attachment device for high-voltage circuit breakers Schneider Electric Evolis, Susol VL-06. |
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For connecting the instrument to the computer network or laptop (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 angular movement transducer DP21 to the high-voltage circuit breaker 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 software. |
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Manipulating rod is designed for test cables connection from the ground or from the tank cover to the bushings of high-voltage circuit breakers, and to the structural elements of high-voltage disconnecting switches and earthing devices, without the use of ladders or elevated platforms. The manipulating rod is completed with special extension cables. There is a Kelvin clamp with current and potential contacts to connect to the object on one side, and a contact pad on the other side. The device test cable is connected to the contact pad from the ground or a tank cover. Manipulating rod extension cable is made according to a four-wire (Kelvin) scheme with the test current capacity of 100 A in the presence of a good contact.
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We will talk about attachment devices and the differences between "recalculation templates" and "measurement templates".
27 february 2023
Sharing the results of testings on 110 kv HV circuit breaker of HGF 1012 type and telling in details about template types to make diagnostic easier
23 june 2022
Various methods are used to assess the condition of high-voltage circuit breaker, but the most convenient way of circuit breaker diagnostic is the use of specially designed instruments such as PKV/M15, PKV/M7 and PKV/U3.0. PKV group instruments application significally reduces the time of the complete diagnostic with a considerable increase in its quality and allows you to avoid the necessity of major maintenance.
21 june 2022
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
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.
Open Original
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
Open Original
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
Open Original
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
Open Original
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
Open Original
The electrical laboratory of Vorkutinskaya TPP-2 Vorkutinskiye TPP, LLC T Plus, PJSC has in its instrumental and technical base the following devices manufactured by SKB EP, LLC:
With the help of micro-ohmmeters, electrical laboratory personnel measures DC resistance of contact connections, and PKV/M5N and PKV/M7 devices are actively used to measure the speed and time parameters of circuit breakers of 6, 35 and 110 kV voltage classes.
Micro-ohmmeters are convenient to use due to their autonomy and mobility. PKV/M5N device, despite its long service life, is relevant during the diagnostic of high-voltage circuit breakers (due to the presence of linear and angular movement transducers in the complete set), but, due to moral aging and replacement with new analogues, the device cannot be supplemented with new components. The new PKV/M7 device is supplemented with all the necessary spare parts, is modern, mobile, accurate and, based on this, is more in demand by electrical laboratory specialists.
As a result of the operation of devices manufactured by SKB EP, LLC by the personnel of Vorkutinskaya TPP-2, we can say about the reliability and high-quality operation of the above-mentioned devices and express a desire to continue interaction with specialists of SKB EP, LLC on technical and commercial issues.
Open Original
The branch of Rosseti Tomsk, PJSC has been using PKV/M7 circuit breaker analyzer manufactured by SKB EP, LLC since 2019.
With the help of this device, we carry out diagnostic of oil circuit breakers VMP(E)-10, VKE-10, VMT-110, MKP-110.
PKV/M7 device has proven itself on the positive side. The device is very convenient and easy to use, thus allowing to reduce the labor costs of repair personnel. The device measures important parameters with high accuracy (time difference, compression, speed, etc.).
We express our gratitude to SKB EP, LLC for the production of high-quality and reliable products and recommend their use to organizations engaged in the operation, diagnostics and repair of electrical equipment.
Open Original
The technical maintenance and repair services of substations of the Permenergo the branch of IDGC of Urals, OJSC have been using PKV/M7, PKV/M6N, PKV/M5 and MIKO-1 devices manufactured by SKB EP, LLC for more than eight years.
The instrument pool consists of:
With the use of the above-mentioned devices, the state diagnostics and adjustment of the following switching equipment are performed:
During the operation, PKV/M7, PKV/M6N, PKV/M5, and MIKO-1 devices have proven themselves on the good side. Due to the simple interface, they are simple and easy to operate, while they have high measurement accuracy, small overall dimensions and are very reliable.
PKV/M7 software makes it possible to create and maintain measurement archive, including the ability to enter nominal test data, which, in turn, allows you to conduct a primary analysis of the equipment diagnostic results directly at the workplace.
PKV-group devices allow you to measure a number of important parameters in one measurement cycle (time difference, pressure, speed, time, etc.), which significantly reduces the processing time and evaluation of the circuit breaker technical condition, and generally reduces the time for equipment repair.
The devices are equipped with a high-quality set of test cables, clamps, and fasteners.
We recommend the devices manufactured by SKB EP, LLC to other organizations working in the field of operation and adjustment of electrical equipment.
Open Original
Currently, the following devices manufactured by SKB EP, LLC are used at the substations of the Prioksky EMPN:
With the help of these devices, all the necessary time and speed characteristics of high-voltage circuit breakers of various types are removed, as well as the transient resistances of the equipment contacts are measured.
All of the above-mentioned devices are easy to operate, have a compact design and light weight. These features allow them to be used directly at the installation site of the equipment that is being repaired.
During the operation, the devices have proven themselves to be good in terms of operation and measurement accuracy.
Open Original
In the Taksimovskaya distance of power supply we have been operating PKV/M7 that is dedicated for high-voltage circuit breakers monitoring and diagnostic. Devices manufactured by SKB EP, LLC have been in operation at the distance for about ten years. PKV/M7 replaced the previous version of circuit breaker analyzers PKV/M5, which, in turn, proved to be working only on the positive side. Just as PKV/M7 is now similarly well-established. This circuit breaker analyzer allows to perform a wide range of measurements of the switching devices parameters. With this device, you can detect a lot of malfunctions, including single-phase breakage or multi-phase breakage of the current-carrying circuit of high-voltage circuit breakers that can lead to large-scale accidents and damage of the electrical equipment.
The main advantages of PKV/M7 are high accuracy of measuring the time parameters, detailed information about the state of the circuit breakers based on the recorded graphs. Extended operation temperature range of the device from -20°C to +40°C, which allows you to perform the diagnostic in low temperature conditions. Compared to PKV/M5, the overall dimensions of PKV/M7 have been reduced, which makes it easier to transport the device to the measurement objects. I can surely recommend devices manufactured by SKB EP, LLC to other operating companies.
Open Original
Since 2013, Kaliningrad TPP-2 the branch of Inter RAO - Power Generation JSC has been successfully operating PKV/M7 a high-voltage circuit breaker analyzer. This device is used by the personnel of the electrical department to measure the parameters of SF6 switching devices 110-330 kV.
PKV/M7 device is very simple and easy to use. A simple and clear menu does not require special training or skills to work with it. The device itself is quite compact, easy to carry and transport to remote objects. PKV/M7 is suitable for carrying out measurements for all types of circuit breakers (SF6, oil, vacuum) and does not require additional remote units, which makes it very convenient to operate. The fact that one employee is able to complete all the work significantly reduces the labor costs for preparing and performing measurements. The device allows you to automatically measure and calculate the parameters of the tested equipment, and the use of the internal memory of the device simplifies and speeds up the process of filling out measurement reports and protocols. Also important is the presence of the extended range of supply voltages of the device that significantly reduces the time spent looking for a power source, especially at remote sites.
During the entire operation of PKV/M7, no problems or malfunctions were detected with the device. Without a doubt, I would recommend using this device to other companies.
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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