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Operates in 4 modes: microohmmeter, milliohmmeter, kiloohmmeter and thermometer
Multipurpose instrument performing all tasks regarding resistance measurement in high-voltage equipment
"Microohmeter" mode: contact resistance measuring at the maximum current of 1,000 А in the range within 1 µOhm ÷ 105 µOhm
"Milliohmmeter" mode: measuring winding resistance within the range of 0.1 mOhm-106 mOhm
"Kiloohmmeter" mode: measurement of resitance within the range of 0.1 kOhm-3*102 kOhm
"Thermometer" mode: measurement of temperatures of windings, oil and air within the range of -20°C to +120°C
Automatic self-tuning for the object measured
Self-contained power supply, small dimensions and weight
Measuring cables of unique and ergonomic design

Micromillikilloohmmeter MIKO-2.3

Certificates
  • Safety Test Certificate IEC 61010-1:2001
  • EMC Compatibility IEC 61326-1:2005
  • Russian Register of Innovative Products
  • Russian State Register Certificates
  • Declaration of Conformity of the Customs Union
Operates in 4 modes: microohmmeter, milliohmmeter, kiloohmmeter and thermometer

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: microohmmeter, milliohmmeter, kiloohmmeter and thermometer.

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

All types of electrical equipment (transformers, electrical machines and electrical switching devices) require different means for full-rate diagnostics. 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 microohmmeter, milliohmmeter, thermometer and even kiloohmeter 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.

"Microohmeter" mode: contact resistance measuring at the maximum current of 1,000 А in the range within 1 µOhm ÷ 105 µOhm

This mode is designed for measuring transfer resistances of any switching devices as well as of demountable and nondemountable contact connections in the range within 1 µOhm  ÷ 105 µOhm. Moreover, this mode allows considering the availability or absence of current in the measured circuit of transformer. 

When measuring transfer resistances of contacts and connections questions regarding the strength of the measuring current arise as in case of dry contacts the result of measurement will be falsely high. That is why the main requirements to microohmeters are the following: provision of quite heavy operating current which allows burning of acidified film forming on contacts and giving significant error at resistance measuring.

MIKO-2.3 surpasses all foreign- and home-produced microohmmeters. The closest foreign analogue microohmeter with the current of 500A has the weight of 7.5 kg and mains supply. At the same time MIKO-2.3 with its weight of only 2.7 kg produces current of 1,000А. It is particularly true about dead-tank circuit breakers of MKP and U type, the contact circuit of which contains up to eight series-connected arcing contacts and two main contacts which means that they are more sensitive to corrosion and repair labour input is bigger due to the great amount of oil in the tank.

MIKO-2.3 complies with the international standard IEC 60694 "Common specifications for high-voltage switchgear and controlgear standards" (International Electrotechnical Commission (IEC)), specifying current strength for microohmmeters from 50А to the nominal current of the measured item which excludes erroneous diagnostics results.

The instrument has an archive for storing the results of measurements in "microohmmeter" mode; meant for storing of 62 measuring results. For each measurement the value of resistance, current strength and measurement date/time are stored in the archive.

Data transmission to the computer and filing of measurement results is performed with the help of a special program developed by the manufacturer.

"Milliohmmeter" mode: measuring winding resistance within the range of 0.1 mOhm-106 mOhm

It is designed for measurement of direct-current resistance in circuits with high inductance (transformers, electromagnets etc.) within the range of 0.1 mOhm-106 mOhm.

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 "milliohmmeter" 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.

"Kiloohmmeter" mode: measurement of resitance within the range of 0.1 kOhm-3*102 kOhm

It is designed for measurement of resistance of potential dividers, ballast, closing and other resistors in terms of considerable interference and induced voltage within the range of 0.1 kOhm-3*102 kOhm.

"Thermometer" mode: measurement of temperatures of windings, oil and air within the range of -20°C to +120°C

It is designed for measurement of temperatures of windings, oil and air within the range of -20°C to +120°C.

Automatic self-tuning for the object measured

Switching on each of four modes occurs automatically when appropriate input cable from the instrument set is connected.

Self-contained power supply, small dimensions and weight

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.

Light weight and self-contained supply (charge time is 3 to 5 min) give an opportunity to use MIKO-2.3 not while standing on ground, but while being on a switch cover or in a cradle scaffold. That is why the length and weight of cables of MIKO-2.3 are significantly lesser, and one can go down and up the equipment only once instead of two times in case of measurement with a ground-based appliance.

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

Measuring cables of unique and ergonomic design

MIKO-2.3 input cables are equipped with clamps of "alligator clip with ground clamp" type 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 remote potential contacts.

Specifications Value
"Microohmeter" mode: -
Electric resistance measuring range, µOhm 1 ÷ 100,000
Maximum permissible intrinsic relative error of electric resistance measurement, % ±0.2
Measuring current intensity range during electric resistance measurement in "CT (current transformer)-available" and "CT-not available" submodes, А 10 ÷ 1000
Measuring current intensity range during electric resistance measurement in "CT-available Тmax" submode, А 100 ÷ 400
Maximum time of one measurement in "CT-not available" submode, sec 2
Maximum time of one measurement in "CT-available" submode, sec 30
Maximum time of one measurement in "CT-available Тmax" submode, sec 20
"Milliohmmeter" mode: -
Electric resistance measuring range, mOhm 0.1 ÷ 1,000,000
Maximum permissible intrinsic relative error of electric resistance measurement, % ±0.2
Measuring current intensity range during electric resistance measurement, А 0.5 ÷ 5
One measurement time, sec 10 ÷ 900
"Kiloohmmeter" mode: -
Electric resistance measuring mode, kOhm 0.1 ÷ 300
Maximum permissible intrinsic relative error of electric resistance measurement, % ±0.5
Value of induced voltage across the resistor, kV ≤ 5
Maximum time of one measurement, sec 3
"Thermometer" mode: -
Temperature measuring range, °С -20 ÷ +120
Maximum permissible intrinsic absolute error of temperature measurement, °С ±1.0
Maximum accumulator charge time, min 5
Maximum power consumed in the power circuit, W 60
Operation temperature range, ºС -20 ÷ +40
IP rating in operating state IP20
Maximum measuring unit weight, kg 2.7
Dimensions, mm 150х190х75
Interface language English
User manuals language English
Calibration period, year 1
Standard complete set
Photo Item, Index Application
MIKO-2.3 measuring unit MIKO-2.3 measuring unit СКБ025.01.00.000 The instrument and accompanying documents: calibration certificate, operation manual and record book.
3U-1A charging device 3U-1A charging device СКБ023.20.00.000 For charging of the accumulator during measurement of resistance on electric equipment.
K162 microohmmeter cable K162 microohmmeter cable СКБ023.02.00.000-01 For measurement of resistance of oil (U-110; MKP-110; VMT-110 types), air (ВВОА-15 type) and gas-insulated high-voltage circuit breakers (VGU-220; VGV-110; ZAR1DT-145; ZNM428; VGBU-110; VGB-330 types). Clamps of "alligator clip + ground clamp" type (length 2.3 m + 1.1 m).
Potential spring-loaded contact (2 pcs.) Potential spring-loaded contact (2 pcs.) СКБ023.21.00.000/-01 For connection to the input pin. Included into the complete set of the K162 measuring cable.
Potential pin contact (2 pcs.) Potential pin contact (2 pcs.) СКБ023.22.00.000/-01 For connection to the input pin. Included into the complete set of the K162 measuring cable.
K233 milliohmmeter cable K233 milliohmmeter cable СКБ023.07.00.000-02 For measurement of resistance of power transformer windings with the voltage of 110 kV and less under direct current. Input pin diameter is up to 37 mm (length 6.0 m + 2.0 m).
K322 kiloohmmeter cable K322 kiloohmmeter cable СКБ023.06.00.000-01 For measurement of multiplier, shunt and dividing resistances in case of presence of induced voltage for them (length 3.4 m + 2.1 m).
Thermometer with K411 cable Thermometer with K411 cable СКБ023.08.00.000 For measurement of oil, water and air temperature (length 1.8 m).
RS-232 interface cable RS-232 interface cable СКБ023.11.00.000 For transmission of measurement results to a computer as well as for control of the instrument via a PC (length 1.5 m).
Mains extension cable Mains extension cable СКБ023.16.00.000 For connection of the charging device when placing the instrument on the input of the high-voltage circuit breaker.
Test shunt 75ШСМ МЗ-0,5 Test shunt 75ШСМ МЗ-0,5 Functional check in microohmmeter and milliohmmeter modes. The value is 1 mOhm ± 0.5%.
Zero resistance equivalent Zero resistance equivalent 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 СКБ123.02.01.000
Bag for a cable set Bag for a cable set СКБ23.02.02.000
Additional complete set (on order)
Photo Item, Index Application
K161 microohmmeter cable K161 microohmmeter cable СКБ023.02.00.000 For measurement of resistance of oil (all for 6, 10 and 35 kV), air (VBB-10; VVE-35; VVChP-15 types) and gas-insulated high-voltage circuit breakers (VGT-110; ZAR2F1; VGV-35; VGU-110; ZAR1FE; VGT-110; ZNM427.04980; VGB-35 types). Clamps of “alligator clip + ground clamp” type (length 0.9 m + 0.9 m). The maximum current up to 1000A.
K163 microohmmeter cable K163 microohmmeter cable СКБ023.02.00.000-02 For measurement of resistance 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 gas-insulated high-voltage circuit breakers (ZAR2F1; VGU-220; VGU-330; VGB-220; ZNM427.07465 types). Clamps of “alligator clip + ground clamp” type (length 4.5 m + 1.0 m). The maximum current up to 500A.
K164 microohmmeter cable K164 microohmmeter cable СКБ023.02.00.000-03 For measurement of resistance of oil (U-220; MKP-220; VMT-220 types in case of work without a hoist). Clamps of “alligator clip + ground clamp” type (length 3.8 m + 1.7 m). The maximum current up to 500A.
K165 microohmmeter cable K165 microohmmeter cable СКБ023.02.00.000-04 For measurement of resistance of air (VNV-330; VV-500B; VVBK-500; VDN-330Б; VNV-330; VNV-500; VVDM-330B types) and gas-insulated high-voltage circuit breakers (VGU-500; VGB-750; VGB-500; VGB-330). Clamps of “alligator clip + ground clamp” type (length 10.0 m + 1.0 m). The maximum current up to 500A.
K154 microohmmeter with contacts K154 microohmmeter with contacts СКБ023.05.00.000 Cable with two needle contacts – potential contact is spring-loaded. Applied in case of impossibility of connection to the facility using cables with clamps of “alligator clip + ground clamp” type. For example, in control of collecting and connecting buses. For pairwork (length 1.0 m + 1.9 m).
K155 microohmmeter cable with contacts K155 microohmmeter cable with contacts СКБ023.13.00.000 Cable with one needle contact and one clamp of “alligator clip + ground clamp” type. Applied in case of impossibility of connection to the facility using cables with clamps of “alligator clip + ground clamp” type. Allows working alone (length 0.9 m + 2.3 m).
K121 microohmmeter cable with contacts K121 microohmmeter cable with contacts СКБ023.09.00.000 Cable with removable probes and removable small clamps of "alligator clip" type. It is used along with one of K161 ÷ K165 cables for measurement of resistance in any area between connection points of clamps of "alligator clip + ground clamp" type. Cable length (standard length 1.8 m + 1.8 m) can be changed on demand.
Cable for microohmmeter with quick-operating ground clip Cable for microohmmeter with quick-operating ground clip Cable for control of high-voltage switches with input pins with diameter of over 80 mm. The cable clamp is equipped with a quick-operating ground clip that ensures instant connection to input pins due to availability of a button at its bottom. One can instantly place a clamp on a pin by pushing the button and fix it reliably by tightening a ground clip screw against stop. High reliability of the fastening excludes the possibility of the cable breakdown. Cable length (standard length 0.9 m + 0.9 m) can be changed on demand.
K238 milliohmmeter cable K238 milliohmmeter cable СКБ023.07.00.000-06 Cable for measurement of resistance of direct current of power transformer windings with the voltage of 500 kV and less (pin input diameter up to 37 mm.) In case MIKO-2.3 is placed on the transformer cover (length 6.5 m + 6.5 m).
K236 milliohmmeter cable K236 milliohmmeter cable СКБ023.07.00.000-04 Cable for measurement of resistance of direct current of power transformer windings with the voltage of 110 kV and less (input pin diameter is up to 37 mm). In case MIKO-2.3 is placed on the ground (length 9.0 m + 9.0 m).
K239 milliohmmeter cable K239 milliohmmeter cable СКБ023.25.00.000 Cable for measurement of resistance 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 (length 6.5 m + 6.5 m).
К240 extension cable К240 extension cable СКБ023.24.00.000 An extension cable for combined operation with K238 and K239 measuring cables. In case MIKO-2.3 is placed on the ground (length 8.5 m).
K235 milliohmmeter cable K235 milliohmmeter cable СКБ023.23.00.000 Cable for measurement of resistance on direct current of electric motors, electromagnets, current transformers etc. (length 3 m).
K321 kiloohmmeter cable K321 kiloohmmeter cable СКБ023.06.00.000 Cable for measurement of multiplier, shunt and dividing resistances in the presence of induced voltage (length 2.1 m + 3.4 m).
Manipulating rod Manipulating rod СКБ010.41.00.000
СКБ010.41.00.000-01
СКБ010.41.00.000-02
The rod is designed to ensure convenient connection to contacts of a high-voltage item.

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);
Safety Test Certificate IEC 61010-1:2001 on the MIKO-2.3
EMC Compatibility IEC 61326-1:2005 on the MIKO-2.3
MIKO-2.3 is included in Russian Register of Innovative Products under #239, valid until 12.10.2018.
MIKO-2.3 is included in Russian State Register under #51888-12, valid until 09.10.2022
MIKO-2.3 - EAC № RU Д-RU.ME97.B.00024; valid until 21.10.2019.
Testimonials about Micromillikilloohmmeter MIKO-2.3, PKV/U3.0, PKV/U3.1
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.

Testimonials about Micromillikilloohmmeter MIKO-2.3
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.

Testimonials about Micromillikilloohmmeter MIKO-2.3
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.

Testimonials about Micromillikilloohmmeter MIKO-2.3, Milliohmmeter MIKO-7 with advance software, Milliohmmeter MIKO-7 with basic software
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.

Testimonials about Micromillikilloohmmeter MIKO-2.3, Milliohmmeter MIKO-8
OGUEP OBLKOMMUNENERGO

In 2010 OGUEP Oblkommunenergo procured MIKO-1 micro ohmmeter for measuring the transient resistance of high-voltage circuit breaker contacts. It should be noted that capacity of the battery ideally fits the instrument, its charge is sufficient for the whole working day of heavy operation.

In 2011 we procured the MIKO-2.3 instrument for measuring the ohm resistance of high-voltage transformer windings. The instrument has advantages similar to those of MIKO-1 but capacity of the battery is sometimes insufficient for making measurements on a high-voltage transformer if it cannot be charged on site.

After positive experience of operating the MIKO instruments, in 2013 we procured five MIKO-8 devices.

MIKO instruments ideally suit companies that deal with maintenance, adjustment and testing. The instruments have high precision, are simple in operation, compact and have low weight. During operation of MIKO 2-3 and MIKO-8 when measuring the DC resistance the transformer windings are rapidly saturated and, as a result, the time of measurements reduces. Current output by the instrument allows burning the oxide and oil films occurring between contacts thus giving regular records of transient resistance. Another advantage of the instruments is ability to combine potential and current circuits in two terminals and account of proper resistance of wires included into the kit.

Testimonials about Micromillikilloohmmeter MIKO-2.3
SVERDLOVSKY PLANT OF CURRENT TRANSFORMERS

Our Company used MIKO-2.3 instruments #18 manufactured in 2009, and #18 manufactured in 2010.

The instruments are used for measuring the resistance of main switchgears, circuits, of current and power transformers.

The instruments are rather convenient in operation though length of conductors.

We failed to use the instrument for measuring the resistance of transformer windings during thermal tests (in the conditions of rapid change in the windings temperature).

The MIKO-2.3 can be recommended for use by other companies.

Testimonials about Micromillikilloohmmeter MIKO-2.3, PKR-2, PKR-2M
OJSC RUSSIAN RAILWAYS BRANCH NORTHERN RAILWAY STRUCTURAL SUBDIVISION ELECTROTECHNICAL LABORATORY

In 2011 the elctrotechnical laboratory performed trial operation of PKR-1 (an instrument for transformer testing), PKV/M7 (an instrument for high-voltage circuit breaker testing), MIKO-2.3 (micromillikiloohmmeter) instruments manufactured by SKB EP. The instruments demonstrated high efficiency and are of great practical value.

The MIKO-2.3 instrument replaces the whole set of diverse devices for measuring both low (e.g., transient resistances of contacts, DC resistance of transformer windings) and high (e.g., shunt resistances of circuit breakers) resistances. Despite that the instrument is simple in operation, compact and has low weight. Its advantage is ability to be powered both from a battery and from a 220 V network. Rapid saturation of windings during DC resistance measurements drastically reduces the period of measurements.

PKR-1 device for transformer testing is worth special mentioning. Northern Railways currently has no specialized instruments for LTC diagnosis and for recording the circular diagram, therefore, this equipment is of special value. The instrument is easy to operate, has a friendly interface, is rather compact and convenient for transportation, measurements do not take much time. Defects were detected in six out of nine tested transformers and their presence was confirmed during repair.

Testimonials about Micromillikilloohmmeter MIKO-2.3
CJSC ENERGY TECHNOLOGIES

It is used for measuring the DC resistance of transformer windings, for measuring the transient resistances of high-voltage circuit breakers, and for measuring the resistance of metal bonds.

MIKO-2.3 is convenient to use owing to its small size, though rapid battery discharge cause some inconveniences as the device is dependent of the availability of a power network. 950A current produced by the instrument burns the contact and produces reliable data on the transient resistance. Advantage of the instrument is ability to combine potential and current circuits in two clamps, and account of proper resistance of wires included into the kit.

Milliohmmeter mode has a function of automatic conversion of resistance versus temperature difference at the factory and on site.

On the whole MIKO-2.3 considerably reduces the time of measurements and produces reliable and accurate results.

Testimonials about Micromillikilloohmmeter MIKO-2.3
OJSC NORILSK-TAIMYR ENERGY COMPANY Teploelektrocentral-3

MIKO-2.3 instrument has been used by the Company since December 2010. Measurements of DC resistance using this instrument were made on:

  • Power contacts, solenoid coils for VGM-20, MGU-20, VMPEE-10 circuit breakers;
  • Rotor and stator windings of TVF-120, and TVF-63 generators;
  • Stator windings of DAZO2-18-59-10, DAZO-13-67-6M, 2A3M-5000/6000, VAZ-215-89-20, AV-113-4M, and AV-114-6M electric motors;
  • Windings of TCZS-1000, 3NOM-15, NTMI-10, and 2NOM-10 transformers.

The instrument is rather simple and convenient in operation due to small weight, independent power supply, availability of a bag. The instrument is rather precise; the measurements are accurate and reliable. Availability of a digital thermometer reduces calculation time when measuring active resistances.

The MIKO-2.3 can be recommended to all the companies dealing with adjustment, maintenance and operation of electric equipment.

Testimonials about Micromillikilloohmmeter MIKO-2.3
Branch of FAR EASTERN POWER DISTRIBUTION COMPANY South-Yakut Electric Networks

MIKO-2.3 instrument was procured by the Company in December 2008 and has been intensively used during different tests of electric equipment.

The Instrument was used for testing VMPE-10, VMG-133, C-35-M, and MKP-110 circuit breakers (Microohmmeter; Milliohmmeter). The instrument is also used for measuring the DC resistance of transformer windings (Milliohmmeter) and for temperature measurements (Digital Thermometer).

Milliohmmeter mode is the most convenient function. Range of the instrument’s measurements in this mode allows both circuit breaker testing and measurements of DC resistance of transformer windings.

Main advantages of the instrument are its multiple functionality, low weight and small size, availability of a robust casing and a convenient bag for transportation, as well as availability of accessories.

The MIKO-2.3 instrument can be recommended to all the companies dealing with electric equipment testing.

Testimonials about Micromillikilloohmmeter MIKO-2.3
OJSC Negusneft

The MIKO-2.3 instrument was procured in May, 2009. The instrument is being operated in the majority of complex tests of electric equipment of different types. The MIKO-2.3 is operated using all of its capabilities.

Main advantages of MIKO-2.3 instrument over similar instruments:

  • Small weight;
  • Independent power supply;
  • Short period of battery charging;
  • Universal nature (four functions in one instrument);
  • Friendly man-machine interface;
  • High quality of assembly;
  • Availability of robust connection cables.
Articles (3)
Selection of a universal analyzer for the transformers, electric machines and switching equipment
Selection of a universal analyzer for the transformers, electric machines and switching equipment
The MIKO-2.3, a universal lightweight instrument, is capable to replace at competitive price the whole set of special-purpose instruments with the same range of functions.
Power transformer defects detected by the MIKO-2.3
Power transformer defects detected by the MIKO-2.3
By measuring the ohmic resistance of transformer windings, the MIKO-2.3 detects such defects as break of one or several parallel wires in the taps-off, soldering defects, poor connection of winding taps-off to terminals, etc.
Reviews (2)
Field of application of micromillikiloohmmeter MIKO-2.3
Field of application of micromillikiloohmmeter MIKO-2.3
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: microohmmeter, milliohmmeter, kiloohmmeter and thermometer.
Integrated Testing of SKB EP Instruments
Integrated Testing of SKB EP Instruments
In early April, SKB EP specialists have conducted an integrated testing at 110/35/10 "Pivovariha" substation, where the following instruments have been used: instruments for control and testing of high-voltage circuit breakers; instruments for resistance measurement (microohmmeters and milliohmmeters) and instruments for control of transformer OLTCs.