Circuit breaker analyzer PKV/M7

Certificates

  • Safety Test Certificate IEC 61010-1:2001
  • Russian State Register Certificates
  • Внесен в Госреестр Республики Казахстан
  • Внесен в Госреестр Республики Беларусь
  • Внесен в Госреестр Киргизской Республики
  • Declaration of Conformity of the Customs Union
  • Russian Register of Innovative Products
  • Recommended for use in JSC Russian Railways electric installations

Monitoring the technical condition of high-voltage circuit breakers up to 4 breaks

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Diagnostics of domestic and foreign circuit breakers

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Sufficient measuring ranges for time (up to 5.2 s), speed (up to 20 m/s) and travel (up to 900 mm) intervals

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High measurement accuracy

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Table of measured and automatic calculations of the technical characteristics of high-voltage circuit breakers

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More detailed information on the status of the circuit breaker can be extracted from the recorded schedules

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Monitoring of high-voltage circuit breakers in simple and compound cycles

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Work with diagnostic results, device control and data transfer on PC

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Proper operation in all weather conditions

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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.

Specifications Value
Number of channels for circuit breaker contacts monitoring, pcs. 4
Range of measurement and recording of time intervals, sec 0.001 ÷ 5.2
Maximum permissible intrinsic error of time interval measurement, ms ±[0,1 + 0,0001*Тх],where Тх – measured time interval
Range of linear movements measurement by DP12 transducer, mm 0.5 ÷ 900
Resolution of linear movements measurement by DP12 transducer, mm 0.5
Maximum permissible intrinsic error of linear movements measurement by DP12 transducer, mm ±1
Range of angular movements measurement by DP21 transducer, degree 0.09 ÷ 360
Resolution of angular movements measurement by DP21 transducer, degree 0.09
Maximum permissible intrinsic error of angular movements measurement by DP12 transducer, mm ±[0,2 + 0,001*a], where a – measured movement
Range of moving speed measurement, m/sec 0,002 ÷ 20
Maximum permissible intrinsic relative error of speed measurement by DP12 transducer in the range of 0.02 ÷ 10 m/sec, % ±2
Power switch cycles "Open", "Close", "Open-Pause-Close", "Close-Delay-Open", "Open-Pause-Close-Delay-Open
Range of current measuring for switch on/off channels (peak value), А ±14
Response level of power switch current protection, А 15 ÷ 20
Range of voltage measurement on "Switch voltage" input (peak value), V ±350
Range of voltage measurement by "Analog input" channel (peak value), V 0 ÷ 12 (monopolar mode), ±6 (bipolar mode)
Resistance range of "Analog input" channel, Ohm 0 ÷ 160 Ohm; (output current of 60 мА); 0 ÷ 2500 Ohm (output current of 4 мА)
Types of data transfer channels USB Device, LAN, RS-232 and RS-485
Maximum consumed power, W 60
Operation temperature range, ºС -20 ÷ +40
IP for transportation IP64
IP rating in operating state IP20
Maximum measuring unit weight, kg 7
Dimensions, mm 360х290х165
Interface and user's manual language English
Calibration interval, year 3
Warranty period, year 13 months

Standard complete set

Photo Item, Index Application
PKV/М7 measuring unit
  • PKV/М7 measuring unit
  • SKB026.00.00.000
  • PKV/М7 measuring unit
  • SKB026.00.00.000

Instrument and accompanying documents: calibration certificate, operation manual, record book, software / user manual.

Linear movement transducer DP12
  • Linear movement transducer DP12
  • SKB012.00.000-02
  • Linear movement transducer DP12
  • SKB012.00.000-02

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.

Measuring stick
  • Measuring stick
  • SKB010.15.00.000-02
  • Measuring stick
  • SKB010.15.00.000-02

Measuring stick in a box. Used together with linear movement transducer DP12 (length – 700 mm // on order – 550 mm and 1,000 mm).

Angular movement transducer DP21
  • Angular movement transducer DP21
  • SKB009.00.00.000
  • Angular movement transducer DP21
  • SKB009.00.00.000

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°.

Transducer cable
  • Transducer cable
  • SKB010.06.00.000-01
  • Transducer cable
  • SKB010.06.00.000-01

For connecting linear (DP12) or angular (DP21) movement transducer to the instrument. Cable insulation – silicone (length – 7 m // on order – 12 m).

А, В, C, D poles cables(4 pcs.)
  • А, В, C, D poles cables(4 pcs.)
  • SKB010.05.00.000/-01/-02/-06
  • А, В, C, D poles cables(4 pcs.)
  • SKB010.05.00.000/-01/-02/-06

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).

Remote start cable
  • Remote start cable
  • SKB021.26.00.000
  • Remote start cable
  • SKB021.26.00.000

For remote start of measuring processes of the instrument. Connected to the drives of high-voltage circuit breaker electromagnet. Rubber insulation (length – 5 m).

Local start cable
  • Local start cable
  • SKB026.16.00.000
  • Local start cable
  • SKB026.16.00.000

For connecting to the high-voltage circuit breaker drive. Equipped with alligator type clamps. Rated current – 50А. Cable insulation – silicone (length – 2.5 m).

Switch input voltage cable
  • Switch input voltage cable
  • SKB026.15.00.000
  • Switch input voltage cable
  • SKB026.15.00.000

For commutated voltage supply. Rated current – 50А. Cable insulation – silicone (length – 2 m).

Resistance measurement cable
  • Resistance measurement cable
  • SKB026.18.00.000
  • Resistance measurement cable
  • SKB026.18.00.000

For measuring resistance in the range between 0 ÷ 240 Ohm and 0 ÷ 2.5 kOhm. Equipped with M5 screw end caps (length – 2.5m).

Attachment devices set
  • Attachment devices set
  • Attachment devices set

For attachment of DP12 and DP21 transducers to various Russian-manufactured high-voltage circuit breakers (clamps, boards, connector adapters, etc.).

Mains cable
  • Mains cable
  • SKB018.09.00.000
  • Mains cable
  • SKB018.09.00.000

For connecting the instrument to the power line. Temperature range – 25°С ÷ +45°С. Rubber insulation (length – 2 m).

Ground cable
  • Ground cable
  • SKB010.01.00.000
  • Ground cable
  • SKB010.01.00.000

For PKV/M7 case grounding. Equipped with a ground clamp and screw end cap. Rated current – 50А (length – 1.75 m).

LAN cable
  • LAN cable
  • SKB024.26.00.000
  • LAN cable
  • SKB024.26.00.000

For connecting the instrument to the computer network or notebook (length – 2 m).

Cable end caps (8 pcs.)
  • Cable end caps (8 pcs.)
  • SKB021.26.00.003
  • Cable end caps (8 pcs.)
  • SKB021.26.00.003

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.

VP2B-1V-2А / VP2B-1V-10А cut-outs
  • VP2B-1V-2А / VP2B-1V-10А cut-outs
  • VP2B-1V-2А / VP2B-1V-10А cut-outs

For power source protection (2 + 2 pcs.).

Attachment devices set kit
  • Attachment devices set kit
  • SKB126.06.02.000
  • Attachment devices set kit
  • SKB126.06.02.000

Cabel carrying case
  • Cabel carrying case
  • SKB126.10.00.000
  • Cabel carrying case
  • SKB126.10.00.000

Additional complete set (on order)

Photo Item, Index Application
Measuring stick in a box
  • Measuring stick in a box
  • SKB012.03.00.000/-01
  • Measuring stick in a box
  • SKB012.03.00.000/-01

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).

Transducer cable
  • Transducer cable
  • СКБ010.06.00.000-02
  • Transducer cable
  • СКБ010.06.00.000-02

For connecting linear (DP12) or angular (DP21) movement transducer to the instrument. Cable insulation – silicone (length – 12 m // in standard complete set – 7 m).

Cable for voltage measurement by
  • Cable for voltage measurement by "Analog input" channel
  • SKB026.19.00.000
  • Cable for voltage measurement by "Analog input" channel
  • SKB026.19.00.000

For measuring voltage in the range between 0 ÷ 12V and -6 ÷ +6V. Equipped with М5 screw end caps (length – 2.5 m).

Power cable adapter
  • Power cable adapter
  • SKB010.25.00.000/-01/-02
  • Power cable adapter
  • SKB010.25.00.000/-01/-02

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).

DP32.1 variable-resistance linear movement transducer
  • DP32.1 variable-resistance linear movement transducer
  • SKB026.22.00.000
  • DP32.1 variable-resistance linear movement transducer
  • SKB026.22.00.000

For measuring linear movements of moving parts of vacuum circuit breakers with open insulating housing in the range of 25 mm. Includes:
For fixing of DP32.1 transducer position behind the movable contact of the arch chute with diameter of up to 25 mm.
For fixing of DP32.1 transducer position behind the insulating frame of VVTE-M-10 vacuum circuit breaker pole.

Clamp meters
  • Clamp meters
  • SKB026.21.00.000
  • Clamp meters
  • SKB026.21.00.000

For measuring currents of electromagnets and solenoids. Supplied complete with a coupler. Current of up to 600А (cable length – 2.5 m).

Attachment devices set (for foreign-made circuit breakers)
  • Attachment devices set (for foreign-made circuit breakers)
  • Attachment devices set (for foreign-made circuit breakers)

For attaching of DP21 angular movement transducer to SF6 circuit breakers manufactured by Siemens, ABB, Areva, etc.

 Nozzle No. 61
  • Nozzle No. 61
  • SKB010.00.00.039
  • Nozzle No. 61
  • SKB010.00.00.039

Mounting fixture for high voltage circuit breakers Schneider Electric Evolis, Susol VL-06.

 Nozzle No. 62
  • Nozzle No. 62
  • SKB10.00.00.039-01
  • Nozzle No. 62
  • SKB10.00.00.039-01

Mounting fixture for high voltage circuit breakers Schneider Electric Evolis, Susol VL-06.

 Nozzle No. 63
  • Nozzle No. 63
  • SKB010.00.00.039-02
  • Nozzle No. 63
  • SKB010.00.00.039-02

Mounting fixture for high voltage circuit breakers Schneider Electric Evolis, Susol VL-06.

RS-232 cable
  • RS-232 cable
  • SKB024.25.00.000
  • RS-232 cable
  • SKB024.25.00.000

For connecting the instrument to the computer network or notebook (length - 1.5 m).

Nozzle No.12
  • Nozzle No.12
  • SKB009.11.00.000
  • Nozzle No.12
  • SKB009.11.00.000

For installation of DP21 linear movement transducer on VE or VES type (or other type) high-voltage circuit breakers.

Attaching clamp No.20
  • Attaching clamp No.20
  • SKB010.17.00.000
  • Attaching clamp No.20
  • SKB010.17.00.000

Installed instead of housing below the drive for fixing of DP12 linear movement transducer to VGU and similar type high-voltage circuit breakers.

Fixing bracket No.22
  • Fixing bracket No.22
  • SKB010.14.00.000
  • Fixing bracket No.22
  • SKB010.14.00.000

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.

Bushing №54
  • Bushing №54
  • SKB010.38.00.001
  • Bushing №54
  • SKB010.38.00.001

To install the angle sensor DP21 to the high-voltage switch VBP-10 and the similar.

Laptop
  • Laptop
  • Laptop

For PKV/М7 control from computer as well as for measurement data processing in a special program.

Manipulating rod
  • Manipulating rod
  • SKB110.41.00.000
    SKB110.41.00.000-01
    SKB110.41.00.000-02
  • Manipulating rod
  • SKB110.41.00.000
    SKB110.41.00.000-01
    SKB110.41.00.000-02

The rod is designed to ensure convenient connection to contacts of a HV circuit breakers.

The rod is completed with a clamp with current and potential contacts connected by wires with the measurement platform. Test cables are connected to the measurement platform from the ground.

  • Manipulating rod for equipment of up to 35kV (2.2 m);
  • Manipulating rod for equipment of up to 110kV (3.7 m);
  • Manipulating rod for equipment of up to 220kV (5.1 m);

Circuit breaker analizers PKV/M6N
Circuit breaker analizers PKV/M7
  • Open Original

    Central Electrical Grids the branch of Magadanenergo, PJSC

    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

    Ust-Labinsk Electrical Grids the branch of Rosseti Kuban, PJSC

    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

    SD "Central Electrical Grids" the branch of "Amursk region Electrical Grids" "DRSK", JSC

    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

    Kuzbassenergo-RES the branch of Rosseti Siberia, PJSC

    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

    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

    ZETO SMP Siberia, LLC

    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

    Capital-Stroy Diagnostics, LLC

    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

    Engineering Center EnergoRazvitie, LLC

    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:

    • informative, accurate in measurements; 
    • easy to use; 
    • reliable and compact.
    The MIKO-9A instrument is used to test power transformers. The device is equipped with a wide range of test leads, it is possible to measure in a three-phase scheme, which makes it possible to quickly perform a large number of measurements with a minimum of specialists, reducing the number of connection operations. The presence of a built-in high-capacity battery allows measurements in the field, regardless of the availability of the mains. The instrument has small weight and size parameters, and is also very convenient to use due to the presence of the following functions:

    • automatic operation mode;
    • demagnetization of the transformer;
    • convenient and intuitive interface.

    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

    JSC PE Elektroapparat

    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:

    • measurement accuracy, simplicity and information content of the measurement process control; 
    • mobility, autonomous power supply from the built-in battery, small dimensions and weight, convenient carrying bag, which allows you to use it in the field; 
    • devices meet the stated requirements
    All this allows you to perform the required number of measurements quickly and accurately with the least effort.

    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

    ITC UralEnergoEngineering, LLC

    In 2018, our company purchased the PKV/M7 instrument. The use of this device allows the company’s specialists to provide comprehensive inspection services for circuit breakers without opening, which significantly reduces the labor costs of repair personnel. The interface of the instrument and software for processing measurement results is friendly and intuitive.Thanks to its impact-resistant housing, the device is very reliable with frequent relocation of a team of diagnostic engineers from facility to facility. Separately, we note the qualitatively developed by the manufacturer methodology for the diagnosis of circuit breakers, which is a positive point in the training and internship of young specialists.

    We can recommend the PKB/M7 instrument to all enterprises operating, repairing and diagnosing high-voltage circuit breakers.

    This review is allowed to use for promotional purposes.

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