Advanced precision milli-ohmmeter MIKO-9A

Certificates

  • Safety Test Certificate IEC 61010-1:2001
  • Conformity certificate with safety requirements EC/EU
  • Russian State Register Certificates
  • Declaration of Conformity of the Customs Union

Resistance measurement in inductive and non-inductive circuits in the range of 1 μΩ - 30 kΩ

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Automatic measurement of three-phase transformers

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Simultaneous resistance measurement across 2 windings

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AUTO demagnetization mode

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Non-demountable estimation of the OLTCs (DRM test)

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Heat run test

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Various auto calculations and non-volatile memory

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High level of protection and safety conformity

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Autonomy, TFT touch display, remote control and bluetooth data transfer

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MIKO-9A milli-ohmmeter is developed to measure DC resistance in the range of 1 µΩ - 30 kΩ with test current up to 10 А, as well as to generate oscillograms of a switching contactor in the high-speed OLTC; it also provides for demagnetization and "Heat Run Test".

MIKO-9A diagnostic objects:

  • Windings of power and instrument transformers, windings of electric motors, generators, linear compensators and windings of other high-inductive equipment;
  • Contacts of circuit breakers, resistors, buses and other non-inductive circuit;
  • Compensatory, current limiting and other resistors of high-voltage circuit bre­akers;
  • Сables.

Test current range is specified both in automatic and manual modes; resistance measurement range is set automatically. The instrument ensures fully automated resistance measurement of highly inductive load and thermal EMF balancing in external circuit.

MIKO-9A implements specialized measurement modes for various configurations of 11 objects (resistive object, inductive object, voltage transformer, current transformer and power transformer, generator, motor, reactor, compensator, connection filter and magnet), taking into account their specific features. The user can select a standard object from the list, or create his own object.

The device automatically takes into account the configuration of the object for setting measurement modes.

Watch detailed video-reviews about MIKO-9A milli-ohmmeter up above or on our YouTube. Watch videos and subscribe.

Depending on the object type, special measurement modes can be selected. For a resistive object, the modes are completely similar to the MIKO-8М(А), and for an inductive object, in addition to the two modes MANUAL and AUTO 1Ph, you can select AUTO 3Ph and 2 WINDINGS.

AUTO 3Ph makes it possible to simultaneously connect to three phases of the transformer and take measurements with automatic switching between them. This mode reduces the amount of reconnecting to/from the object under test.

AUTO 1Ph and AUTO 3Ph modes have SKB EP patented automatic measurement method that guarantees results with the highest accuracy.

It is achieved by setting the max test current in the measurement circuit not on a staggered basis (depending on the value of the measured resistance), but continuously w/o fixed measurement ranges in a wide load range.

This measurement mode provides high signal level in a complex electromagnetic environment of industrial production or substation. Moreover, in AUTO modes of the measurement process the instrument produces the highest current that enables guaranteed saturation of the transformer magnetic system.

Depending on the object type, special measurement modes can be selected. For a resistive object, the modes are completely similar to the MIKO-8М(А) device, and for an inductive object, in addition to the three modes MANUAL, AUTO 1Ph and AUTO 3Ph, you can choose 2 WINDINGS mode.

This mode enables resistance measurement simultaneously on two windings, and guarantees a quick and reliable measurement of the electrical resistance of heavy power transformers, in particular, with secondary windings delta connected when using traditional methods does not give a stable result.

The device indicates which phases should be connected to accelerate the measurement process, taking into account the distribution of magnetic fluxes in the magnetic circuit. In addition, the simultaneous measurement of two windings reduces the total number of test cable reconnection from 6 to 3.

Demagnetization mode is designed to eliminate the remnant magnetism of the transformer magnetic core. It is compulsory to be made before open-circuit test, short-circuit loss measurement, transformation ratio measurement, etc.

The instrument can be used for demagnetization of both single-phase and three-phase transformers. Magnetic core demagnetization requires alternating current applied to the corresponding winding bidirectionally.

Demagnetization is performed automatically. Current decreases with each direction change. Each rod of a three-phase transformer is subjected to demagnetization.

Current change is at the same time displayed in a graph form to control demagnetization accuracy. Demagnetization stops automatically when the current reaches threshold value or upon the user’s command

OLTC non-demountable check mode allows the user to assess the state of the switching OLTC equipment with current limiting resistors without removing the contactor tank cover.

This mode involves measuring of instant test current values. Test current firstly passes through the transformer winding and then through OLTC contacts at switching from one tap to another. The DRM graph is built on the basis of the measurement results and shows current change during tap changing. This graph enables to check tap changing time and general object state.

Analysis of the acquired graphs enables not only to sort out OLTC by fault-free/faulty criteria but also to define the nature of the defect eliminating the opening of fault-free OLTCs. Milli-ohmmeter mode and DRM test complement each other and provide the user comprehensive information about the transformer state.

The test is performed by continuous measurement and periodic result saving of the transformer winding resistance (recalculated to t°) during the cooling process of the winding.

To receive the most reliable information about the max winding t° the user should connect the instrument to the winding and start the measurement immediately after the transformer heating is stopped.

Before the start of the measurement process the user has to specify winding, phase, max measurement duration, frequency of measurement results saving, winding resistance and temperature under normal conditions. Correlation between the winding temperature and the time can be represented in tabular or graphical form. The time is counted from the moment of the measurement start. Heat run test stops automatically on expiry of preset test duration or manually by the user.

MIKO-9A has a built-in archive of up to 1,000 measurements for viewing, copying or deleting data. And due to the possibility of choosing an object at the measurement stage, the results are presented more systematically. This facilitates interaction with the archive.

The group of MIKO-7M(A), MIKO-8M(A) and MIKO-9A instruments has a number of automatic recalculation functions:

  • Auto δ calculation of Rphase between one another.
  • Auto conversion of Rlinear to Rphase. Linear windings are Delta or Star without neutral connected.
  • Auto correction of R measured at to R at t°p taking into account the winding material.
  • Auto δ calculation between Rcorrected and Rp.
  • Auto calculation of by its R.

Measurement results are automatically saved to the non-volatile memory and can be later processed by special software on PC or transmitted via Bluetooth to a smartphone.

MIKO-9A has the safety certificate IEC 61010-1. The instrument also meets the requirements of electromagnetic compatibility that are applied to class A instruments according to IEC 61326-1.

The instrument has a high degree of protection against:

  • test cable or mains cable breakdown;
  • excess of test current;
  • EMF of self-induction;
  • overheat of the test block.

At disconnection of the test cable from transformer bushings or from the instrument as well as at disconnection of the mains cable from the mains in the course of measurement, EMF of self-induction of up to several kV is generated in the disconnected circuit and the electric arc appears in the break point.

MIKO-9A is characterized by the redundant protection against EMF of self-induction in case of involuntary disconnection of the test cable or mains cable protecting users from electric shock and the instrument from being damaged.

MIKO-9A instrument can be powered from the mains (AC 90-253 V, 47-63 Hz // DC 127-354 V) or from a built-in battery.

Color graphic display of high brightness ensures easy reading on a sunny day, whereas intuitively understandable interface with a sensor display facilitates the instrument use.

The instrument can be manipulated either from the film keyboard or from the sensor display, as suits.

The instrument can be built into the testing systems under control of software complexes of test laboratories and equipment manufacturers. It is supported by Modbus RTU Protocol.

Specifications Value
Resistance range 1 μΩ - 30 kΩ
Resolution capability 0.1 μΩ
Accuracy ±(0.1%+0.5 µΩ)
Test current output 0.0005 A - 10 A
Test current range in DRM mode 0.1 A - 10 A
Measurement display resolution 5 digits
MIKO-9A: Power supply (built-in battery) Li-ion battery
MIKO-9A: Battery charge time 3 hours
MIKO-9A: Duration of continuous operation of the battery 8 hours
Built-in memory up to 1,000 measurements
PC connection USB, RS-485 and Bluetooth
Display Color graphic TFT touch, 800 x 480 pixels
Power consumption 120 W
Output capacity, W 60 W
MIKO-9A: Power supply (mains voltage) AC 90-253 V, 47-63 Hz
DC 127-354 V
Dimensions 270 х 250 х 130 mm
MIKO-9A: Main instrument weight 4.0 kg
Operating temperature range -20ºС - +55ºС
Environmental protection with open cover IP40
Environmental protection with closed cover IP67
Interface and user manual language English
Testing period 3 years
Calibration period 3 years
Warranty period 3 years

Standard complete set

Photo Item, Index Application
MIKO-9A main instrument
  • MIKO-9A main instrument
  • SKB041.00.000-01
  • MIKO-9A main instrument
  • SKB041.00.000-01

Instrument and documents: User Manual, and a Log Book.

Test cables <br><b>on order</b>
  • Test cables
    on order
  • Test cables
    on order

As a matter of convenience for the user, test cables are not included to the standard complete set. Each user can select a cable to his/her own requirements.
Please, select at least one test cable (see "additional complete set on order" below).

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

Mains cable 1 x 2 m. Weight 0.24 kg.
For instrument connection to the main network. Temperature range -25°С - +120°С. Rubber insulation.

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

Ground cable 1 x 2 m. Weight 0.08 kg.
For instrument grounding. The cable is equipped with a ground clamp and a screw end cap. Nominal test current is 50 A.

Zero resistance standard
  • Zero resistance standard
  • SKB023.15.00.000
  • Zero resistance standard
  • SKB023.15.00.000

Resistance zero point accuracy check. Value – 0.000 µOhm.

Shunt
  • Shunt
  • Shunt

Type: 75ShSM M3 (75ШСМ М3). For checking MIKO-9A operability. Value – 1 mΩ ± 0.5%.

Fuses
  • Fuses
  • Fuses

Type: VP2B-1V-2A (ВП2Б-1В-2А) (2 pcs). For the power source protection.

USB 2.0 A-B Cable
  • USB 2.0 A-B Cable
  • USB 2.0 A-B Cable

USB cable 1 x 1.8 m. For computer connection and data transfer.

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

Additional complete set (on order)

Photo Item, Index Application
Test cable<br>(set of 2 pcs.)
  • Test cable
    (set of 2 pcs.)
  • SKB041.18.00.000
    SKB041.18.00.000-01
  • Test cable
    (set of 2 pcs.)
  • SKB041.18.00.000
    SKB041.18.00.000-01

10A Kelvin Clamp test cable 2 x 8.5 m (jaw up to 80 mm) for connection to transformer bushings. Set weight 3.45 kg (1.72 kg + 1.72 kg).
Elastic silicone tube resistant to low and high temperatures and corrosive media.

Test cable<br>(set of 2 pcs.)
  • Test cable
    (set of 2 pcs.)
  • SKB041.22.00.000
    SKB041.22.00.000-01
  • Test cable
    (set of 2 pcs.)
  • SKB041.22.00.000
    SKB041.22.00.000-01

10A Kelvin Clamp test cable 2 x 8.5 m (jaw up to 80 mm) for connection to transformer bushings. Modification of the SKB041.18.00.000(-01) cable. To be used on transformers with bushings located close to each other. Set weight 3.45 kg (1.72 kg + 1.72 kg).
Elastic silicone tube resistant to low and high temperatures, and corrosive media.

Test cable
  • Test cable
  • SKB041.19.00.000
  • Test cable
  • SKB041.19.00.000

10A Kelvin test cable 1 x 3 m. Weight 0.5 kg.
With 2 probes and 4 crocodile clips (jaw up to 25 mm) (length: 70 mm, plug: 3 mm) for contact resistance measurement of CT and VT contact joints and windings.

Test cable<br>(set of 2 pcs.)
  • Test cable
    (set of 2 pcs.)
  • SKB041.26.00.000
    SKB041.26.00.000-01
  • Test cable
    (set of 2 pcs.)
  • SKB041.26.00.000
    SKB041.26.00.000-01

10A Kelvin C-clamp test cable 2 x 8.5 m (jaw up to 103 mm) for connection to transformer bushings. Set weight 4.42 kg (2.2 kg + 2.22 kg).
Alternative version of test cables SKB041.18.00.000(-01).

Test cables for CT and VT
  • Test cables for CT and VT
  • SKB041.21.00.000
  • Test cables for CT and VT
  • SKB041.21.00.000

10A Kelvin Clamp test cable 1 x 4 m (jaw up to 25 mm) for resistance measurement of CT and VT windings. Weight 0.61 kg.

Cable is used for CTs and VTs which are stand-alone or built into transformers / circuit breakers.

Test cable
  • Test cable
  • 041.28.00.000
  • Test cable
  • 041.28.00.000

10A Kelvin test cable 1 x 2.5 m with spring-loaded probes. To be used for electrical resistance measurement in hard-to-reach places.

Test cable extension<br>(set of 2 pcs.)
  • Test cable extension
    (set of 2 pcs.)
  • SKB031.20.00.000
  • Test cable extension
    (set of 2 pcs.)
  • SKB031.20.00.000

Extension cable 2 x 6.5 m. Set weight 2.33 kg (1.17 kg + 1.16 kg).
Elastic silicone tube resistant to low and high temperatures and corrosive media.

To be used together with test cables SKB041.18.00.000/(-01) (jaw up to 80 mm) and SKB041.26.00.000/(-01) (jaw up to 103 mm).

Short-circuiting cable<br>(set of 3 pcs.)
  • Short-circuiting cable
    (set of 3 pcs.)
  • SKB041.23.00.000
  • Short-circuiting cable
    (set of 3 pcs.)
  • SKB041.23.00.000

Short-circuiting cable set 3 x 3 m with crocodile clips (jaw up to 80 mm). Set weight 1.89 kg (0.63 kg + 0.63 kg + 0.63 kg).

The set is used for applying the DRM-test by short-circuiting secondary circuits. This cable is for OLTCs of power transformers.
Furthermore, this cable is needed for connecting high-voltage and low-voltage windings when 2 windings mode is applied.

Short-circuiting cable (set of 3 pcs.)
  • Short-circuiting cable (set of 3 pcs.)
  • SKB035.31.00.000
  • Short-circuiting cable (set of 3 pcs.)
  • SKB035.31.00.000

Short-circuiting cable set 3 x 12 m with crocodile clips (jaw up to 50 mm). Set weight 0.8 kg (0.27 kg + 0.27 kg + 0.27 kg).

The set is used for applying the DRM test by short-circuiting secondary circuits. This cable is for OLTCs of power and auto transformers.

Additional resistor
  • Additional resistor
  • SKB032.25.00.000
  • Additional resistor
  • SKB032.25.00.000

For non-demountable OLTC monitoring at total resistance of the winding of no more than 0.5 Ω.
Length 0.11 m + 0.35 m. Weight 0.23 kg.

KMDLAX-6P plug
  • KMDLAX-6P plug
  • KMDLAX-6P plug

An adapter for the RS-485 cable for the analyzer communication with the SCADA-controlled measurement system.

Adapter for a reference coil
  • Adapter for a reference coil
  • SKB023.12.00.000
  • Adapter for a reference coil
  • SKB023.12.00.000

For testing laboratories: inspection / calibration of the instrument.
Length 0.025 m + 0.16 m. Weight 0.04 kg.

Tool bag
  • Tool bag
  • SKB126.06.00.000
  • Tool bag
  • SKB126.06.00.000

Convenient, robust, wear proof bag for transportation of cables, documentation and other accessories to the MIKO-9A instrument.

Manipulating rod
  • Manipulating rod
  • SKB010.41.00.000
    SKB010.41.00.000-01
    SKB010.41.00.000-02
  • Manipulating rod
  • SKB010.41.00.000
    SKB010.41.00.000-01
    SKB010.41.00.000-02

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 50 A.

  • Open Original

    Uranenergo, LLP

    For 1 year MIKO-9A milli-ohmmeter is been used in the laboratory of insulation testing and over voltage protection service.

    The device is used to test the resistance of substation equipment. During the operation, device was distinguished by its simplicity in assembling the measuring circuit, reliability when taking into account operation temperature conditions, relative speed of measurements that makes it possible to reduce the time during testing. The compactness and low weight of the device simplify the operation and transportation process. The resistance measurement function is the best because of the accuracy and quick detection of results. It is also worth noting that the mode of non-demountable diagnostic of OLTC devices is very convenient for assessing the state of the switching device and significantly reduces the amount of work. Since the device has been used relatively recently, no electrical equipment malfunctions have been detected.

    Despite the short period of use, for the quality, versatility and conformity of price and quality, Uranenergo, LLP confidently recommends MIKO-9A for testing high-voltage equipment, and hopes for the appearance of new and innovative devices manufactured by SKB EP, LLC.

  • Open Original

    Tver Carriage Building Plant, JSC

    On behalf of the SSD of TVZ, JSC MW in Moscow we would like to express our sincere gratitude and deep appreciation to SKB EP, LLC for providing digital and modern measurement equipment! Since February 2021, our department has been using MIKO-9A milliohmmeter.

    The milliohmmeter is used for diagnostic and detection of turn-to-turn short circuits of traction electric motors and network reactors of electric trains of the EG2Tv "Ivolga" series.

    Due to MIKO-9A compactness and lightness, as well as the presence of a built-in battery and the ability to measure the resistance of the conductor under inductive load, the device can be used in space-limited conditions allowing to detect malfunctions without dismantling the trolleys from the car.

    During MIKO-9A operation, it was possible to identify a malfunction in 3 traction electric motors with a capacity of 300 kW and two network reactors. And these defects could not be determined by the available measurement instruments of our division.

  • Open Original

    KazTransOil, JSC

    1. What device do you use (the number of devices used)? For how long?
    Since June 2019, MIKO-9A device has been used in the amount of 1 piece.

    2. What equipment do you check with the devices manufactured by SKB EP, LLC?
    3-phase power transformers up to 1000 kVA and single-phase transformers of 6-10 kV. Also, high-voltage synchronous and asynchronous electric motors of 10 kV.

    3. How convenient is it to use the device?
    The device is very convenient for working with the tested equipment.

    4. What functions of the device do you consider the best?
    Measurements of the ohmic resistance of the windings of transformers and electric motors.

    5. What problems or malfunctions were detected with the help of the device? On what kind of high-voltage equipment?
    No malfunctions were detected. The device works flawlessly.

    [Manufacturer note]: This question was not understood correctly by the specialists of KazTransOil, JSC.

    6. Specify the economic effect you have received from using the device: the number of detected faulty objects from the entire list of diagnosed equipment, the number of man-hours saved when working with the device compared to using old measurement methods, etc.?
    Working with this device speeds up the work on checking and testing the equipment. The measurement is performed faster, probably 5 (five) times, compared to analog devices.

    7. Can you recommend our devices to other organizations?
    I already recommend them to colleagues from other regions of Kazakhstan.

  • Open Original

    Taksimovskaya distance of power supply the branch of Russian Railways

    MIKO-9A milli-ohmmeter manufactured by SKB EP, LLC is operated in the Taksimovskaya distance of power supply. During use, the device has proven itself on the positive side. The main advantage of MIKO-9A is high measurement speed that significantly reduced the overall test time compared to the previously used device DC bridge R4833. The following equipment was checked using MIKO-9A: voltage transformers ZNOM 27.5 kV, ZNOM 35 kV, power transformers TMG-25/6/10, OSGZ-1-25/27.5, TSZKU-400/10, TMZH-100/27.5, TM-630/10, autotransformers, and current limiting reactors.

    With the help of the device were detected the following malfunctions of the diagnosed equipment: the ohmic resistance of the windings - a difference of more than 100% on the equipment TMG-25/6/10, OSGZ-1-25/27.5, TM-630/10, circuit break of the OCTC position on the equipment TMG-25/6/10, TM-630/10.

    I would like to recommend MIKO-9A to other organizations.

  • Open Original

    Central Power Networks the branch of Yakutskenergo, PJSC

    The service of isolation, overvoltage protection and measurements of Central Power Networks of Yakutskenergo, PJSC currently uses 4 measurement devices manufactured by SKB EP, LLC:

    • MIKO-1 - 3 pcs.;
    • MIKO-9A - 1 pc.

    MIKO-1 device has been actively operated since 2012 to measure contact resistance of high-voltage circuit breakers, disconnectors, separators, and other electrical equipment of switchgears. The device is easy to use, has a small weight and dimensions. Due to the reliable contact and cable connections measurement accuracy of the data obtained is high. Furthermore, the device is equipped with a convenient bag. During operation, the device has proven itself as a simple, unpretentious to use, but quite an accurate device.

    MIKO-9A device has proven itself perfectly (it has been in operation since 2019) when working on measuring DC resistance of power and measurement transformers. Among the main advantages of the device, we would like to point out the following:

    • Possibility of simultaneous measurement by 3 phases;
    • Reliable contact and cable connections;
    • High accuracy and speed of the measurements;
    • The ability to compare the data obtained with the factory data directly during the measurement process;
    • Large battery capacity, choice of operation from mains or battery;
    • Compactness, light weight, easy-to-use interface.

    Devices manufactured by SKB EP, LLC have definitely proven themselves on the positive side, no malfunctions were found in their work. These devices can be recommended to the enterprises engaged in the repair, operation and diagnostics of high-voltage equipment.

  • Open Original

    Mysovskaya distance of power supply branch of Russian Railways

    In 2019, we purchased and accepted for continuous using MIKO-2.3 micromillikilohmmeter and MIKO-9A milliometer, manufactured by SKB EP. The instruments are used in the process of servicing high-voltage equipment 220 - 6 kV - power, step-down and measuring transformers, high-voltage circuit breakers, disconnectors, separators and short-circuits, contact joints of busbars and connecting buses, cable lines. MIKO-2.3 and MIKO-9A came to replace obsolete AC and DC bridges.

    During the operation, the personnel of our company have repeatedly noted the positive aspects of the devices: ease of use, wide scope and accuracy. Considering the peculiarities of our enterprise’s territorial location (7 traction substations of 110 —220 kV with a total capacity of 780 MVA, 4 transformer substations of 35 kV, more than 350 complete transformer substations of 6 — 27.5 kV, in an area of ​​over 300 km) it is worth noting the convenience of devices when using in the role of a compact laboratory, allowing to replace a large number of devices and measuring instruments of the repair and revision team, without loss in quality and completeness of the complex of technological operations.  We would also like to draw attention to the simplicity of data processing after performing tests and measurements.

    MIKO-2.3 and MIKO-9A instruments allow timely and accurate detection of developing equipment defects, which in turn reduces the risk of emergencies, violations and malfunctions of technical equipment. Excessive costs for equipment and diagnostic tools, significantly reduced the cost of metrological support and repair.

    The management and personnel of the Mysovskaya distance of power supply, recommends the use of MIKO-2.3 and MIKO-9A instruments manufactured by SKB EP for organizations that perform maintenance of high voltage electrical equipment. This is one of the best market solutions.
  • Open Original

    Tayshetskaya distance of power supply branch of Russian Railways

    In 2018, our company purchased the MIKO-9A device. In this instrument, our employees like the versatility of the device and its size. Сarrying bag, in which you can fold all the cables and the necessary tools, is very convenient. Among the features of the device, we highlight the high accuracy of measurements with the ability to save results. Pleased with the high autonomy of the device, the battery lasts for several dozen measurements.

    During the use of the device, failures in its operation were not detected.

    Considering the above, we can recommend MIKO-9A for various laboratories (mobile and stationary) and we allow the use of feedback for advertising purposes.

  • Open Original

    Engineering Center EnergoRazvitie, LLC

    EnergoRazvitie Engineering Center, LLC reports that MIKO-9A, РКR-2М, MIKO-2.3, РКV/М7 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.

    МIКО-2.3 instrument and high-voltage circuit breaker analyzer РКV/М7 are actively used by our organization in measuring the contact resistance of high-voltage circuit breakers. ln particular, gas-insulated core circuit breakers of the ELF type SP7-2 at 500 kV manufactured by АВВ. 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 contact 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 а micro-ohmmeter, which determines the dependence of the instrument on the availability of the mains. Test leads for 500 kV circuit breakers must be of а minimum length of 10 meters with reliable and convenient clamps for connection, and this requires additional specification of the order.

    Circuit breaker analyzer РКV/М7 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. А small number of contact cables and the use of different instrument connectors make it possible to reduce the likelihood of personnel error when assembling the test circuit. РКV/М7 is а 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.

    МIКО-9А instrument is used to test power transformers and autotransformers. In particular, in May 2020, the device was successfully tested on the А ТDСТN-250000/220/11 О autotransformer. MIKO-9 А is equipped with а wide range of test cables (it is possible to measure three-phase circuit), which makes it possible to quickly perform а large number of measurements, reducing connection operations, with а minimum of specialists.

    The presence of а 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, а convenient and intuitive interface), is small and lightweight.

    РКR-2М 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 а built-in battery increases its mobility and ease of use. Equipped with long probes (optional) and а 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.

  • Open Original

    Sakhalin Energy Investment Company Ltd.

    Sakhalin Energy Investment Company Ltd. (hereinafter - the Company) informs that the MIKO-9A instrument operated by our organization, manufactured and delivered by your enterprise, meets the requirements for it. Special equipment and functionality are provided in accordance with the order. 

    Although the operating experience of the device is relatively small (since June 2019), at the moment it seems possible to note a number of positive comments on the effectiveness of its use:

    • Compactness and lightness;
    • A wide range of test leads and probes;
    • The presence of power from the network and from the built-in battery.

    For example, in the field, there is no need to organize the device’s power supply from the network, and when the battery is discharged, it is possible to connect the mains power and continue the measurement without waiting for the battery to charge.

    • Fast saturation of windings when measuring objects with high inductance (powerful power transformers, synchronous / asynchronous machines);
    • The large capacity of the built-in battery allows you to perform a large number of measurements without recharging it;
    • There are manual and automatic measurement modes, which allows you to choose the necessary functional settings.

    For example, it is very convenient to measure the transition resistance of contacts (including the ground loop) in automatic mode using needle probes with spring-loaded contacts, since the device starts to measure automatically after connecting the probes to the measurement object, which makes it possible to quickly perform a large number of routine and similar measurements and does not require the involvement of two people.

    • In the kit for the device there is a calibration shunt and an element of zero resistance, which allows you to quickly monitor the performance of the instrument in the field;
    • In the measurement options there are options for the demagnetization of the transformer and in-place on-load tap-changer diagnostics using the DRM method;
    • The demagnetization option of the transformer has already proven its effectiveness - the inrush of the magnetization current has been reduced to a safe value;
    • The device interface is intuitive and understandable;
    • Instructions for use of the device are itemized and detailed (there is no need to contact technical support on any issues related to its setup and use)
    The advantages of this instrument, as indicated above, allow you to maximize the efficiency and quality of measurements in the field with minimal human resources.

    Sakhalin Energy Investment Company Ltd. hopes for further fruitful cooperation.

  • Open Original

    PJSC T Plus Sverdlovsk branch of "Novo-Sverdlovsk CHP"

    On October 21, 2019, SKB Electrotechnical Instrument Making LLC, in a classroom at the Novo-Sverdlovsk Thermal Power Plant, conducted a demonstration and demonstration measurements for MIKO and PKV instruments to employees of the electrotechnical laboratories of several stations of the PJSC T Plus Sverdlovsk branch of "Novo-Sverdlovsk CHP.

    The measurements were performed on the VGM-20 circuit breaker in conjunction with representatives of SKB EP: Konstantin Muravin, Gennady Kurov, Natalia Korneeva. The following devices were demonstrated: the MIKO-21 microohmmeter (transition resistance of the contacts was measured) and the control device for the high-voltage circuit breakers PKV / M7 (the characteristics of the stroke, speed, time, and also the timing of the contacts were taken).

    On 6 kV 5DV-A motors, designed to measure the active resistance of DC windings, the operation of millimeters MIKO-7M (A) and MIKO-9A have been shown.

    Instruments have proven themselves on the good side in terms of operation and accuracy, as well as measurement speed. We recommend them for purchase and operation.

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