Multipurpose low / high resistance meter MIKO-2.3

Certificates

  • Safety Test Certificate IEC 61010-1:2001
  • Russian State Register Certificates
  • Declaration of Conformity of the Customs Union
  • Russian Register of Innovative Products

Operates in 4 modes: micro-ohmmeter, milli-ohmmeter, kilo-ohmmeter and thermometer

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Multipurpose instrument that performs all tasks regarding resistance measurement in high-voltage equipment

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Micro-ohmmeter mode: contact resistance measurement at maximum current of 1,000 А in the range 0.1 μΩ - 0.1 Ω

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Milli-ohmmeter mode: winding resistance measurement within the range 100 μΩ - 1 kΩ

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Kilo-ohmmeter mode: resistance measurement within the range 0.1 kΩ - 300 kΩ

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Thermometer mode: measurement of temperatures of different environments within the range -20°C to +120°C

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Automatic self-tuning for the measurement object

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Self-contained power supply, small dimensions and weight

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Test cables of unique and ergonomic design

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MIKO-2.3 is a portable mini-laboratory allowing performing of all tasks connected with resistance measurement in electrical equipment as this instrument operates in four modes: micro-ohmmeter, milli-ohmmeter, kilo-ohmmeter and thermometer.

Watch detailed video-reviews about MIKO-2.3 Multipurpose low / high resistance meter up above or on our YouTube. Watch videos and subscribe.

All types of electrical equipment (transformers, electrical machines and electrical switching devices) require different means for full-rate diagnostic. However, in case of direct-current resistance measurement the multipurpose instrument MIKO-2.3 can be used.

Resistance range for the above listed equipment is wide and resides within the values from 10-3 to 600А and more.

For monitoring of a transformer or a sole circuit-breaker, for instance, a micro-ohmmeter, milli-ohmmeter, thermometer and even kilo-ohmeter are needed. It means that you have to use three or even four instruments one at a time which is not usually convenient. Increasing of the number of instruments increases not only the total cost of a set, but also its weight which complicates transportation of equipment to remote facilities.

Micro-ohmmeter mode is designed for measuring contact resistances of any switching devices as well as collapsible and non-collapsible contact connections in the range within 1 µOhm - 105 µOhm.

In addition, this mode allows you to take into account the presence or abse­nce of a current transformer in the measured circuit:

  • sub-mode "CT-no";
  • sub-mode "CT-yes";
  • sub-mode "CT-yes, Tmax".

But the main requirements for micro-ohmmeters are to provide a rather large operating current, which is able to burn through oxidized films. They are formed on the contacts and give a significant inaccuracy in the measurement of resistance.

MIKO-2.3 surpasses all foreign and domestic micro-ohmmeters. The closest micro-ohmmeter in terms of characteristics at a current of up to 500 A has a mass of 7.5 kg and mains charge. MIKO-2.3 with a mass of only 2.7 kg gives a current of up to 1000 A, and also runs on a capacitor bank.

In the micro-ohmmeter mode, the device has an archive for saving 62 results with the values ​​of the measured resistance. Archive is designed to store, view, delete measurement results, as well as to transfer them to a PC.

To transfer data to a PC and maintain a measurement archive, an RS-232 cable, a special adapter (optional) and the MIKO measurement archive program are used.

Milli-ohmmeter mode is designed for measurement of direct-current resistance in circuits with high inductance (transformers, electromagnets etc.) within the range of 100 μΩ - 1 kΩ.

Two submodes are used here: measurement of one-phase and three-phase windings. Besides, MIKO-2.3 has a function of automatic recalculation of resistance measurement results for a three-phase winding:

  • calculation of relative deviations of resistance values of moving coils between each other;
  • recalculation of resistance values of moving coils connected according to the triangle scheme into resistance values of phase windings;
  • recalculation of resistance values of moving coils connected according to the star scheme into resistance values of phase windings;
  • recalculation of a winding resistance measured at current temperature T into resistance at base temperature Ɵ with due account for the winding material.

The appliance has an archive for storage of results of changing the "milli-ohmmeter" mode that allows for storing and reading 63 results for electrical resistance of one-phase windings and 21 result for three-phase windings.

A special program by the manufacturer is used for transmission of data to a computer and for keeping archive records of measurements on a PC.

Kilo-ohmmeter mode is designed for measurement of resistance of ballast, shunt, additional and other resistors with induced voltage up to 5 kV, as well as without induced voltage within the range of 0.1 kΩ - 300 kΩ.

Thermometer mode is designed to measure the temperature of oil, water, air and other non-aggressive environments within the range from -20°C to +120°C.

Identification of each of the four modes is automatic by connecting the corresponding test cable.

Due to a combination of functional and mass-dimensional parameters (150 x 190 x 75 mm; 2.7 kg) MIKO-2.3 achieves cutting edge innovation, while the above features and self-contained power supply (charge time is 3 to 5 min) ensure full portability and high mobility of the instrument over the vast territory of substation or facility.

Versatility and weight of the appliance are especially critical for organizations responsible for facility commissioning that have to constantly carry heavy weights of instruments and equipment for significant distances.

MIKO-2.3 instrument is easy to use and maintain, reliable and resistant to electromagnetic field influence.

MIKO-2.3 test cables are equipped with Kelvin clamps of crocodile and G-clamp types of unique design that has no analogues by other manufacturers of instruments. This design ensures quick and faultless connection to an object that excludes errors of measurement of small resistance values, and ensures reliable contact even in case of oxygenated surfaces of an object.

Besides, there is an option of a four-clamp connection of the instrument cables to circuit-breaker bushings and to transformers through external potential contacts.

Specifications Value
Resolution 0.1 μΩ
Measurement display resolution 4 digits
MICRO-OHMMETER MODE -
Resistance range 0.1 μΩ - 0.1 Ω
Accuracy ±0.2 %
Test current output 10 - 1,000 А
Measurement time -
submode "CT-no" < 2 sec
submode "CT-yes" < 30 sec
submode "CT-yes Tmax" < 20 sec
MILLI-OHMMETER MODE -
Resistance range 100 μΩ - 1 kΩ
Accuracy ±0.2 %
Test current output 0.5 - 5 А
Measurement time from 10 to 900 sec
KILO-OHMMETER MODE -
Resistance range 0.1 kΩ - 300 kΩ
Accuracy ±0.5 %
Measurement time < 3 sec
THERMOMETER -
Temperature measurement range -20°C - +120°C
Accuracy ±1.0°C
- -
Power supply (built-in battery) Condenser
Battery charging time 5 min
Built-in memory 100 measurements
PC connection RS-232 and USB (when using adapter)
Display Alpha-graphic, 6 x 2.5 cm
Power consumption < 60 W
Power supply (mains voltage) AC 100-242 V, 47-63 Hz
DC 100-300 V
Dimensions 150 x 190 x 75 mm
Instrument weight 2.7 kg
Environmental protection IP20
Operating temperature range -20°C - +40°C
Warranty period 13 months
Recommended calibration interval 1 year
Interface and user manual language English

Standard complete set

Photo Item, Index Application
Main instrument MIKO-2.3
  • Main instrument MIKO-2.3
  • SKB025.01.00.000
  • Main instrument MIKO-2.3
  • SKB025.01.00.000

Instrument, a stand for the instrument, and documents: User Manual and Log book.

Charger ZU-1A (BC-1A)
  • Charger ZU-1A (BC-1A)
  • SKB023.20.00.000
  • Charger ZU-1A (BC-1A)
  • SKB023.20.00.000

For battery charging during resistance measurement on electrical equipment.

Micro-ohmmeter test cable K162
  • Micro-ohmmeter test cable K162
  • SKB023.02.00.000-01
  • Micro-ohmmeter test cable K162
  • SKB023.02.00.000-01

Micro-ohmmeter test cable 1 x 2.3m + 1.1m with C-clamps.

For resistance measurement of oil (U-110; MKP-110; VMT-110 types), air (ВВОА-15 type) and SF6 high-voltage circuit breakers (VGU-220; VGV-110; ZAR1DT-145; ZNM428; VGBU-110; VGB-330 types).

Potential spring-loaded contact (2 pcs.)
  • Potential spring-loaded contact (2 pcs.)
  • SKB023.21.00.000/-01
  • Potential spring-loaded contact (2 pcs.)
  • SKB023.21.00.000/-01

For connection to the input pin. Included into the complete set of the K162 measuring cable.

Potential probe (2 pcs.)
  • Potential probe (2 pcs.)
  • SKB023.22.00.000/-01
  • Potential probe (2 pcs.)
  • SKB023.22.00.000/-01

For connection to the input pin. Included into the complete set of the K162 measuring cable.

Milli-ohmmeter test cable K233
  • Milli-ohmmeter test cable K233
  • SKB023.07.00.000-02
  • Milli-ohmmeter test cable K233
  • SKB023.07.00.000-02

Milli-ohmmeter test cable 1 x 6m + 2m with input pin diameter up to 37 mm.
For resistance measurement of power transformer windings with the voltage of 110 kV and less under direct current.

Kilo-ohmmeter test cable K322
  • Kilo-ohmmeter test cable K322
  • SKB023.06.00.000-01
  • Kilo-ohmmeter test cable K322
  • SKB023.06.00.000-01

Kilo-ohmmeter test cable 1 x 3.4m + 2.1m.

For measurement of additional, shunt and dividing resistances in case of presence of induced voltage for them.

Thermometer with cable K411
  • Thermometer with cable K411
  • SKB023.08.00.000
  • Thermometer with cable K411
  • SKB023.08.00.000

Thermometer cable 1 x 1.8m. For temperature measurement of oil, water and air.

Mains extension cable
  • Mains extension cable
  • SKB023.16.00.000
  • Mains extension cable
  • SKB023.16.00.000

Mains cable 1 x 11 m. Weight 0.68 kg.

For charging device connection when placing the instrument on the input of the high-voltage circuit breaker.

RS-232 interface cable
  • RS-232 interface cable
  • SKB023.11.00.000
  • RS-232 interface cable
  • SKB023.11.00.000

Interface cable 1 x 1.5m. For PC connection and data transfer.

Shunt
  • Shunt
  • Shunt

Type: 75ShSM M3 (75ШСМ М3). For functional check in micro-ohmmeter and milli-ohmmeter modes.

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

Accuracy check of the zero point on the resistance scale. The value is 0,000 µOhm.

Instrument transportation bag
  • Instrument transportation bag
  • SKB123.02.01.000
  • Instrument transportation bag
  • SKB123.02.01.000

Convenient and durable bag, providing additional mobility during the operation of the device.

Bag for a cable set
  • Bag for a cable set
  • SKB123.02.02.000
  • Bag for a cable set
  • SKB123.02.02.000

Convenient and durable bag for transporting cables and accessories.

Additional complete set (on order)

Photo Item, Index Application
Micro-ohmmeter test cable K161
  • Micro-ohmmeter test cable K161
  • SKB023.02.00.000
  • Micro-ohmmeter test cable K161
  • SKB023.02.00.000

Micro-ohmmeter test cable 1 x 0.9m + 0.9m with crocodile clips and G-cramps. Maximum current up to 1000A.

For resistance measurement of oil (all for 6, 10 and 35 kV), air (VBB-10; VVE-35; VVChP-15 types) and SF6 high-voltage circuit breakers (VGT-110; ZAR2F1; VGV-35; VGU-110; ZAR1FE; VGT-110; ZNM427.04980; VGB-35 types).

Micro-ohmmeter test cable K163
  • Micro-ohmmeter test cable K163
  • SKB023.02.00.000-02
  • Micro-ohmmeter test cable K163
  • SKB023.02.00.000-02

Micro-ohmmeter test cable 1 x 4.5m + 1m with crocodile clip and G-cramp. Maximum current up to 500A.

For resistance measurement of oil (U-220; MKP-220; VMT-220 types in case of work on a hoist), air (VV-330B; VVBK-110; VVBK-220; VVD-220B; VVS-220B; VVU-110G; VVBM-110B; VVS-110B; VVBK-220 types) and SF6 high-voltage circuit breakers (ZAR2F1; VGU-220; VGU-330; VGB-220; ZNM427.07465 types).

Micro-ohmmeter test cable K164
  • Micro-ohmmeter test cable K164
  • SKB023.02.00.000-03
  • Micro-ohmmeter test cable K164
  • SKB023.02.00.000-03

Micro-ohmmeter test cable 1 x 3.8m + 1.7m with crocodile clip and G-cramp. Maximum current up to 500A.

For resistance measurement of oil high-voltage circuit breakers (U-220; MKP-220; VMT-220 types in case of work without a hoist).

Micro-ohmmeter test cable K165
  • Micro-ohmmeter test cable K165
  • SKB023.02.00.000-04
  • Micro-ohmmeter test cable K165
  • SKB023.02.00.000-04

Micro-ohmmeter test cable 1 x 10m + 1m with crocodile clip and G-cramp. Maximum current up to 500A.

For resistance measurement of air (VNV-330; VV-500B; VVBK-500; VDN-330Б; VNV-330; VNV-500; VVDM-330B types) and SF6 high-voltage circuit breakers (VGU-500; VGB-750; VGB-500; VGB-330).

Micro-ohmmeter test cable K151
  • Micro-ohmmeter test cable K151
  • SKB023.03.00.000
  • Micro-ohmmeter test cable K151
  • SKB023.03.00.000

For resistance measurement of
- of oil high-voltage circuit breakers (all for 6, 10 and 35 kV),
- air high-voltage circuit breakers (VBB-10; VVE-35; VVChP-15 types) and
- SF6 high-voltage circuit breakers (VGT-110; ZAR2F1; VGV-35; VGU-110; ZAR1FE; VGT-110; ZNM427.04980; VGB-35 types).

Lightweight version of the cable K161.
Cable cross section 24mm2. Current up to 200A. Length 0.9m. + 0.9m.

Micro-ohmmeter test cable K152
  • Micro-ohmmeter test cable K152
  • SKB023.03.01.000
  • Micro-ohmmeter test cable K152
  • SKB023.03.01.000

The cable is intended / recommended for monitoring:
- oil high-voltage circuit breakers (U-110; MKP-110; VMT-110 types),
- air high-voltage circuit breakers (ВВОА-15 type) and
- SF6 high-voltage circuit breakers (VGU-220; VGV-110; ZAR1DT-145; ZNM428; VGBU-110; VGB-330 types).

Lightweight version of the cable K162.
Cable cross section is 24mm2. Current up to 200A. Length is 2.27m. + 1.1m.

Micro-ohmmeter test cable K153
  • Micro-ohmmeter test cable K153
  • SKB023.03.02.000
  • Micro-ohmmeter test cable K153
  • SKB023.03.02.000

For resistance measurement of: - air high-voltage circuit breakers (VNV-330; VV-500B; VVBK-500; VDN-330Б; VNV-330; VNV-500; VVDM-330B types) and
- SF6 high-voltage circuit breakers (VGU-500; VGB-750; VGB-500; VGB-330).

Lightweight version of the K165 cable.
Cable cross section 24mm2. Current up to 200A. Length 5.0m. + 5.0m.

Micro-ohmmeter test cable K121
  • Micro-ohmmeter test cable K121
  • SKB023.09.00.000
  • Micro-ohmmeter test cable K121
  • SKB023.09.00.000

Micro-ohmmeter cable 1 x 1.8m + 1.8m (can be changed on demand) with removable probes and removable small crocodile clips.

To be used along with one of K161 ÷ K165 cables for resistance measurement in any area between crocodile clips and G-cramps connection points.

Micro-ohmmeter test cable K154
  • Micro-ohmmeter test cable K154
  • SKB023.05.00.000
  • Micro-ohmmeter test cable K154
  • SKB023.05.00.000

Micro-ohmmeter double hand spike test cable 1 x 1.1m + 1.9m (potential contact is spring-loaded).

Applied in case of impossibility of equipment connection using cables with crocodile clips and G-cramps. For pairwork.

Micro-ohmmeter test cable K155
  • Micro-ohmmeter test cable K155
  • SKB023.13.00.000
  • Micro-ohmmeter test cable K155
  • SKB023.13.00.000

With one double hand spike and one crocodile clip. Potential contact is spring-loaded. Length 0.9m. + 2.3m.

Milli-ohmmeter test cable K236
  • Milli-ohmmeter test cable K236
  • SKB023.07.00.000-04
  • Milli-ohmmeter test cable K236
  • SKB023.07.00.000-04

Milli-ohmmeter test cable 1 x 9m + 9m (input pin diameter up to 37 mm).

For resistance measurement of direct current of power transformer windings with the voltage of 110 kV and less. In case MIKO-2.3 is placed on the ground.

Milli-ohmmeter test cable K238
  • Milli-ohmmeter test cable K238
  • SKB023.07.00.000-06
  • Milli-ohmmeter test cable K238
  • SKB023.07.00.000-06

Milli-ohmmeter test cable 1 x 6.5m + 6.5m (input pin diameter up to 37 mm).

For resistance measurement of direct current of power transformer windings with the voltage of 500 kV and less. In case MIKO-2.3 is placed on the transformer cover.

Milli-ohmmeter test cable K239
  • Milli-ohmmeter test cable K239
  • SKB023.25.00.000
  • Milli-ohmmeter test cable K239
  • SKB023.25.00.000

Milli-ohmmeter test cable 1 x 6.5m + 6.5m (input pin diameter up to 80 mm).

For resistance measurement of direct current of power transformer windings with the voltage of 500 kV and less (the diameter of an input pin is up to 80 mm). In case MIKO-2.3 is placed on the transformer cover.

Milli-ohmmeter extension test cable K240
  • Milli-ohmmeter extension test cable K240
  • SKB023.24.00.000
  • Milli-ohmmeter extension test cable K240
  • SKB023.24.00.000

Extension cable 1 x 8.5m.

For combined operations with K238 and K239 test cables. In case MIKO-2.3 is placed on the ground.

Milli-ohmmeter test cable K235
  • Milli-ohmmeter test cable K235
  • SKB023.23.00.000
  • Milli-ohmmeter test cable K235
  • SKB023.23.00.000

Milli-ohmmeter cable 1 x 3m.

For resistance measurement on direct current of electric motors, electromagnets, current transformers, etc.

Kilo-ohmmeter test cable K321
  • Kilo-ohmmeter test cable K321
  • SKB023.06.00.000
  • Kilo-ohmmeter test cable K321
  • SKB023.06.00.000

Kilo-ohmmeter cable 1 x 0.8m + 0.8m.

For measurement of additional, shunt and dividing resistances in the presence of induced voltage.

Manipulating rod
  • Manipulating rod
  • SKB010.41.00.000
    SKB110.41.00.000-01
    SKB110.41.00.000-02
  • Manipulating rod
  • SKB010.41.00.000
    SKB110.41.00.000-01
    SKB110.41.00.000-02

The rod is designed to ensure convenient connection to contacts of high-voltage equipment inputs.

The rod is completed with Kelvin clamps with current and potential contacts. With the help of the manipulating rod test cables are connected to the measurement platform from the ground.

Micromillikilloohmmeter MIKO-2.3
  • Open Original

    SS Sakhalin RHPP the branch of Sakhalinenergy, PJSC

    We would like to inform you that the following devices manufactured by SKB EP, LLC are in operation at Sakhalin RHPP: PKV/M7, MIKO-2.3, PKR-2.

    The devices have proven themselves to be a good side in terms of operation. Their use allows you to significantly save time for diagnostics of electrical equipment and improve the quality of repairs. The devices are distinguished by ease of operation, compact design, good build quality and high accuracy.

    We are grateful to SKB EP, LLC for the manufacture of high-quality diagnostic devices and for the interest that was shown to the experience of use of their devices. We also hope for the manufacture of new developments that will interest the specialists of electrical laboratories of power enterprises.

  • Open Original

    Kuban MEN the branch of FGC UES, PJSC

    I would like to inform you that in the branch of FGC UES, PJSC - Kuban CMEN uses MIKO-1, MIKO-2.3, MIKO-10, and MIKO-21 microohmmeters.

    During the operation, MIKO-group devices have proven themselves to be the best in terms of reliability, ease of use and accuracy of the results obtained on the state of the switching equipment (circuit breakers, disconnectors). The devices are also good at resistance measurement of pressed connections, resistance measurement of transformer windings. The devices are easy to transport (there is a special carrying bag), they are convenient to use due to the small size and built-in power supply.

    Among the disadvantages there is the lack of crocodile clips (or clamps) in the standard complete set for connecting to a large-section busbar (rigid busbar, hollow wires).

    [Manufacturer note]: Device complete set includes those cables that are most often used on various types of objects. Cables that help to measure resistance on large-section busbars are unfortunately used not as often, so they are included to the additional complete set of the devices and are available by request.

    Devices manufactured by SKB EP, LLC gave a good account of themselves and can be recommended to the companies performing adjustment or repair works, testings and measurements.

  • Open Original

    Eastern Electrical Grids the branch of IPGC, OJSC

    In the Eastern Electrical Grids the branch of IPGC, OJSC we have been using the following devices manufactured by SKB EP, LLC:

    • PKV/M7 circuit breaker analyzer (since 2012);
    • MIKO-1 microohmmeter (since 2014);
    • MIKO-2.3 micromillikiloohmmeter (since 2019).

    PKV/M7 circuit breaker analyzer proved to be reliable, there was not a single case of failure. The device allows to measure several parameters in one measurement cycle, which significantly reduces the total time spent on assessment of the circuit breaker technical condition. The ability to use local and remote start expands the application area of this instrument.

    MIKO-1 microohmmeter has established itself as a simple, unpretentious in use, but quite accurate device. It is compact, and its test cables are flexible, therefore the work might be done even at low temperatures.

    MIKO-2.3 device is easy to use due to its small size. The device is equipped with a convenient and useful carrying bag in that you can put all the accessories and test cables. Additionally, we purchased test cables of different lengths and different other accessories that made it easier to work with the device on various equipment. During the use of the device, no failures in its operation were detected.

    We express our gratitude to SKB EP, LLC for the production of high-quality and reliable devices and we recommend the use of these devices to companies of various activity types.

  • Open Original

    Electrotechnical Laboratory of the Yaroslavl Power Supply Distance of the Northern Energy Supply Directorate

    To date, the following devices are in operation in the electrotechnical laboratory of the Yaroslavl Power Supply Distance of the Northern Energy Supply Directorate: MIKO-2.3, MIKO-7, PKR-1 and PKV/M7.

    These devices are used in conducting a comprehensive survey of electrical equipment of substations, such as power and converter transformers, high-voltage circuit breakers, and disconnectors. During the tests, SKB EP devices gave a good account of their reliability, stability of operation, and ease of use. When using the above-mentioned devices, total measurement time was reduced.

    The use of PKR-1 OLTC analyzer made it possible to more accurately determine the defects of the power transformer and tap changing device during a comprehensive check-up. The most frequently diagnosed damages are burning and adjustment of the contactor contacts of the tap changing device. The second most common defect is the burning of circuit breaker contacts. One of these defects was confirmed by the visual inspection.

    The use of MIKO-2.3 and MIKO-7 devices that are dedicated to the resistance measurement in inductive circuits gave the greatest reduce of measurement time. When using an AC bridge, one resistance measurement of the 110 kV transformer winding lasted about 1.5 minutes. When using MIKO-2.3 or MIKO-7 devices, the time spent on one measurement was reduced to 30 seconds.

    PKV/M7 circuit breaker analyzer is used for a comprehensive assessment of the state of high-voltage circuit breakers. As the main direction was chosen the assessment of SF6 circuit breakers of MKP-110 type. There is a big survey conducted of SF6 circuit breakers installed instead of oil circuit breakers. The use of PKV/M7 circuit breaker analyzer has reduced the time spent on the diagnostics of circuit breakers, and increased the accuracy of the data obtained. Previously, the measurements of the moving parts movement and compression were controlled by a ruler with oil drained from the circuit breaker tank. PKV/M7 circuit breaker analyzer is, first of all, more comfortable to use and has better accuracy comparing to the previously used methods.

    Having experience in the operation of SKB EP devices since 2016, we can definitely recommend the use of these devices for diagnostics of energy facilities.

  • Open Original

    The branch of Rosseti Tymen, JSC - Nizhnevartovsk Electrical Networks

    We have been using the devices MIKO-2.3 (2 pcs.), PKV/M7 (1 pc.) and MIKO-1 (1 pc.) in the Vakhsky district of Nizhnevartovsk electrical networks.

    We have been working with your devices for more than 10 years on the following types of high-voltage switches: VGB-35 (6-110kV), S-35 (with the drives SHPE-12 and PP-67), VMT-110, VGT-110, transformers TM (6-10 kV), TMG (6-10kV), and various types of disconnectors with the voltage 6-220 kV.

    All the devices are quite convenient to use.

    With the help of your devices, we have detected a lot of equipment malfunctions.

    The accuracy of the results compared to similar devices of other manufacturers is at a high level. I can sincerely recommend your devices to other organizations.

    T. N. Ratnikov
    Chief Foreman of the Vakhsky District of Nizhnevartovsk electrical networks

  • Open Original

    Kursk NPP the branch of Rosenergoatom Concern, JSC

    At the present time in high-voltage test, measurements and diagnostic laboratory of the Kursk NPP electrical department there are two MIKO-2.3 devices in operation.

    A complete package of documents, that was included in the complete set of devices, made it possible to register them with our metrology center without any problems.

    During almost daily operation since January 2019, MIKO-2.3 didn’t have serious shortcomings and low-quality that could make the use of devices impossible have not been identified.

    The main advantages of the MIKO-2.3 devices are the ease of use and the absence of errors in assembling the measuring circuit to compare with the traditional method of measuring ohmic resistance by the voltmeter-ammeter method. Digital indication of the measurement result eliminates the subjective factor when the operator senses the readings from the pointer indicator and the errors when calculating the result. Low weight, compactability, absence of moving and fragile details in the device simplifies the requirements for transportation on the territory of the outdoor switchgear and manual movement along the main building of the NPP.

    During the working process with the devices on different types of NPP power equipment (from 0.4 kV and 6 kV switchgear equipment, 400 kVA power transformers, electric motors of all capacities to 630 000 kVA transformers, and 330 kV and 750 kV outdoor switchgear power equipment), the staff of our laboratory had several suggestions for improvement characteristics of MIKO-2.3.

    Kursk NPP would like to thank SKB EP for the manufacture of high-quality devices and for the interest in the experience of its operating. We also look forward to the new developments that will be interesting to the specialists of electrical laboratories of various enterprises.

    U.U. Bogomazov
    Head of the laboratory for high-voltage tests, measurements and diagnostics

  • Open Original

    Branch IRKUTSKENERGO PJSC IRKUTSK HPP

    Specialists of Irkutsk HPP (hydro power plant) have been using the SKB EP instruments for several years. The PKV/M7 instruments were used for measuring time characteristics of moving parts of such circuit breakers as ABB HGI-3 (13.8kV), AREVA HGF-1012 (110kV), SIEMENS 3AP1DT-145 (110kV, 220kV), and 3AP1DT-245 (220kV); the MIKO-2.3 and MIKO-7 instruments are used on electric motors (0.4kV) and the RVR(Z)-20/2000 M-U3, RGNP-110/2000-50UHL1, RDZ-1-110-2000UHL1, and RNDZ-220/2000U1 (13.8/110/220kV) disconnecting devices.

    The PKV/M7 instrument meets all our needs in HV circuit breaker diagnosis. It provides convenient control of poles time difference using the PC software that shows defects in a circuit breaker long before they may cause a heavy failure.

    The MIKO-2.3 milliohmmeter provides quick output of the results of measurements; it is a universal instrument that integrates four modes in one. The instrument is rather convenient and mobile. But for some circuit breaker models the length of a cable for the milliohmmeter mode is not quite sufficient for convenient instrument manipulation. Battery charge for ‘microohmmeter with account of a current transformer’ mode is sufficient for one measurement only, which extends the diagnosis time, but the instrument has an option of fast battery charge.

    The MIKO-7 in the course of operation proved to be rather efficient. The only drawback is non-reliable "crocodile" clips. The instrument has a robust shock-proof housing that “saved” the instrument many times.

    The updated software of the milliohmmeter allowed us to save time and eliminate personnel’s mistakes. When we used a voltampermetre we had to carry several instruments, and a battery; their assembly took time, and measurements on a transformer took two hours minimum. Time of measurements using the MIKO-7 is halved or even makes one third of that.

    Benefits of the PKV/M7 include: information on the results of measurements and ability to operate the circuit breaker from the instrument. The MIKO-2.3 is rather mobile; the MIKO-7 has a large set of functions and automatic mode of operation.

    During the SKB EP instruments operation on the main electric equipment of the plant we did not face any problems, the instruments worked properly, without failures. On the auxiliary equipment the problems with electric motors were timely revealed (inter-winding short circuit, break of windings end).

    Specialists of Irkutsk HPP recommend the PKV/M7, MIKO-2.3 and MIKO-7 to all the companies as they are cost-effective analogues of the instruments of foreign manufacture.

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    JSC ATOMTECHENERGO Balakovo Branch Balakovoatomtechenergo

    A set of the PKV/M7, MIKO-2.3, and PKV-35 instruments manufactured by SKB EP has been in use at Balakovoatomtechenergo since 2011.

    During their operation the instruments proved to be rather efficient.

    The PKV/M7 instrument meets all our needs in the HV circuit breaker diagnosis. It provides convenient control of poles time difference using the PC software that shows defects in a circuit breaker long before they may cause a heavy failure; the function of graphs overlapping is also rather convenient.

    The PKV-35 instrument is used for measurement of minimum voltage of circuit breakers. It operates perfectly.

    The MIKO-2.3 MikroMilliKiloOhmmeter is characterized by universal nature (four modes in one) and high accuracy of measurements. The instrument is rather functional and convenient in use.

    Specialists of JSC ATOMTECHENERGO recommend the PKV/M7, MIKO-2.3, PKV-35 instruments to all the companies dealing with electric equipment maintenance, adjustment and operation in the electric networks.

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    Branch of OJSC Generating Company Naberezhno-chelninskaya TPP

    The MIKO-2.3 MicroMilliKiloOhmmeter has been used by electrical laboratory of Naberezhnye-Chelny TPP (thermal power plant) since 2015, and despite this short period of operation it proved to be rather efficient. The instrument is used for measuring the DC resistance of windings of electric motors, of transformers with the capacity of up to 240 000 kVA, turbine generators of up to 2000 000 kVa, for measuring the transient resistances of contacts of disconnectors, and of 110 kV circuit breakers. The instrument is convenient in operation; fast charging of an in-built battery whose capacity allows a considerable number of resistance measurements of contacts of up to 1000A or tests of several transformers of up to 1000 kVA at a time is worth special mentioning. Owing to relatively high test current the works performance on power transformers and turbo generators takes much less time as compared to measurements using DC bridges. The instrument also has a function of measuring the tested object temperature. Quality of connecting wires and clamps is appropriate. This instrument can be recommended for use in all the companies dealing with equipment testing.
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    BRANCH OF PAO FSK EES WEST SIBERIAN COMPANY OF MAIN ELECTRIC NETWORKS

    Our company has been using 36 different instruments for more than 10 years, namely: MIKO-1, MIKO-2.3, PKV/M7 that are competed with linear and angular displacement transducers DP12, DP21, PKV/V3А, PKV/U3.0, PKV/U3.1, and PUV-50.

    Those instruments are used for testing different connections of substation equipment, for controlling the parameters of high-voltage circuit breakers and disconnectors of 6-500 kV voltage classes.  The devices are simple and easy to operate. The function of automatic construction of oscillograms following the results of measurements is a great merit of the instruments.

    In the course of the power equipment operation the instruments many times detected different incipient defects thus preventing equipment failures and possible subsequent emergencies.

    The instruments can be recommended to companies operating high-voltage equipment.  

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