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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:
Stroke parameters (full stroke, stroke to contact closure, stroke, difference of responses along the course, bounce along the course, flight, rebound);
Time parameters (total time of circuit breaker closing, proper time of circuit breaker closing and pole turning on time);
Speed parameters (speed when turned on, contact timing different times and time bounce).
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:
dependence of speed on time and travel;
dependence of currents and voltages of electromagnets on time and travel;
diagrams of closing/opening processes of the contacts.
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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| Photo | Item, Index | Application |
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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
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.
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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.
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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.
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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 breakersIn particular, gas-insulated core circuit breakers of the ELF type SP7-2 at 500 kV manufactured by ABB. MIKO-2.3 is convenient to use due to its small size. The current generated by the device allows you to burn through the contact and get stable readings of the transition resistance. The advantage of the device is also the combination of potential and current circuits in two terminals and taking into account the own resistance of the wires included in the kit. In general, MIKO-2.3 allows you to reduce the measurement time and get stable and reliable results. However, it is worth paying attention to the fast discharge of the battery when using a microohmmeter, which determines the dependence of the instrument on the availability of the mains. Test leads for 500 kV circuit breakers must be of a minimum length of 10 meters with reliable and convenient clamps for connection, and this requires additional specification of the order.
Circuit breaker analyzer PKV/M7 is simple and convenient to operate, it allows you to control the main characteristics of high-voltage switching devices. The positive thing is that in one measurement cycle the device allows you to measure several parameters, which significantly reduces the processing time and assess the technical condition of the circuit breaker. A small number of contact cables and the use of different instrument connectors make it possible to reduce the likelihood of personnel errors when assembling the test circuit. PKV/M7 is a universal device that allows you to control the parameters of high-voltage circuit breakers, and can be safely recommended to organizations involved in the commissioning and operation of high-voltage equipment.
The MIKO-9A instrument is used to test power transformers and autotransformers. In particular, in May 2020, the device was successfully tested on the ATDCTN-250000/220/110 autotransformer. MIKO-9A is equipped with a wide range of test leads, (it is possible to measure three-phase circuit), which makes it possible to quickly perform a large number of measurements, reducing connection operations, with a minimum of specialists.
The presence of a built-in high-capacity battery allows measurements in the field, regardless of the availability of the mains. The device is very convenient to use (the presence of automatic mode, an important demagnetization option for the transformer, a convenient and intuitive interface), is small and lightweight.
The PKR-2M instrument is used to check the technical condition of switching devices of transformers of all types, both resistor and reactor, using the collapsible method, as well as for diagnosing on-load tap-changers with current-limiting resistors without removing the contactor tank cap. The presence of a built-in battery increases its mobility and ease of use. Equipped with long probes (optional) and a cable with crocodile clamps, it makes it easy to connect to most on-load tap-changers.
The use of these instruments allows our specialists to reduce the time of testing and measurement. These devices these devices are good to use, correspond to the declared characteristics and surpass in many aspects similar devices from other manufacturers.
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PKV-5M instrument has been in operation in Arzamas networks since 2003. According to our experience, the instrument can take readings of mechanical and speed characteristics of MV-10, 35, 110 kV circuit breakers, i.e., the instrument is rather universal.
It is convenient in operation as it has simple attachments and allows printing the results via a computer; it is mobile, reliable (there were no failures during six years of operation).
Open Original
In May 2008 our company procured an instrument for testing and monitoring the high-voltage circuit breakers of PKV/M7 type manufactured by SKB EP, LLC.
Merits of PKV/M7 instrument:
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The PKV/M7 Instrument of SKB EP manufacture (Irkutsk) for testing the high-voltage circuit breakers has been used in the power supply system of Trans-Baikal Railway since 2008. The instrument is used for testing the condition of U-220, VMT-110, and VMT-220 circuit breakers.
The PKV/M7 is reliable and convenient in operation; it allows control of time characteristics of high-voltage breakers operation, squeeze and full travel of contacts. Availability of a Local Start function allows operations on a circuit breaker without involving the personnel of a power substation. Ability to connect the instrument to a personal computer facilitates creation of a data base on diagnosis of the high-voltage circuit breaker conditions in the power supply system of Trans-Baikal Railway.
Open Original
The PKV/M6N Instrument has been used by the Company since 2006. Tested were VMG-133, VMG-10, VMP-10, MGG-10, and VMT-110 circuit breakers. The instrument is rather convenient and simple to operate.
The instrument has enough functions for analysis of the circuit breaker operability.
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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