Control instrument of OLTC transformers PKR-2M

Certificates

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

OLTC maintenance check

More

OLTC in-place check mode (DRM method)

More

Radial diagram measurement of the resistor and reactor type OLTCs

More

Resistor type OLTC contactor switchover oscillography

More

Automatic self-adjustment to OLTC

More

OLTC check in static mode

More

Ergonomic calipers or alligator clip cable

More

Self-contained power supply, storage, transfer and analysis of measurement results in the instrument and PC

More

The instrument is represented in two modifications

More

PKR-2M is intended for demountable diagnostics of OLTC all type (both resistor and reactor type), as well as for in-place check, which enables to diagnose OLTCs with current-limiting resistors without removing the contactor tank cover.

OLTC manufactures: MR, ABB, Hyundai Heavy Industries-Bulgaria.

Watch detailed video-rewievs about PKR-2 OLTC-analyzer up above or on our YouTube. Watch videos and subscribe.

OLTC in-place check enables to conduct express diagnostics of the OLTC technical condition without opening the tank or OLTC removing. This check enables to obtain the contactor switchover diagrams for a wide range of switching devices (except reactor type ones) and conduct the OLTC condition evaluation based on the obtained diagrams, that gives the reasons to denote a defect nature and grounds for decisions related to repair of these on-load tap changers.

For example, for type RS, RNOA, etc., OLTC the correctness of operation of the main and arcing contactor contacts, their condition (burned or not burned contact), current-limiting resistor integrity may be determined. For type RNTA – 35/320 on-load tap changers and in the analogous on-load tap changers, in which the contactor and selector are changed for a fine control circuit breaker, the main and arcing contacts, current-limiting resistor condition, as well as condition of surface of all fixed contacts of the circuit breaker, through which the moving contacts move, may be checked.

The application of in-place check mode based on the DRM method doesn’t require:

  • Opening of the tank or hatch of the fault-free/faulty OLTC and oil drain;
  • Additional money and labor costs for the OLTC diagnostics;
  • Connection of additional elements or knowledge of resistances of current-limiting resistors of the checked on-load tap changer, since all fine adjustments to a certain OLTC are conducted automatically in the instrument.

The instrument is completed with a special transducer for the radial diagram measurement. Its interface with shafts of different drives is provided with a set of axes and bushings, which are installed without any tools by simply putting on the shaft extension.

All characteristics are measured simultaneously based on three phases for OLTCs located in the neutral conductor of "star-connected" windings, and single phase for OLTCs located in the line of "star-" or "delta-connected windings".

The switchover oscillography enables to detect the actuation delay, non-simultaneity of in phase actuation and bouncing during switchover.

All characteristics are measured simultaneously based on three phases for the OLTCs located in the neutral conductor of "star-connected" windings, and single phase for the OLTCs located in the line of "star-" or "delta-connected windings".

No additional elements (for example, resistors) or knowledge of resistances of current-limiting resistors of the checked on-load tap changer are required to measure the OLTC parameters. All adjustments to a specific OLTC are performed automatically in the instrument.

Check conducted during the drive shaft slow rotation using a handle with simultaneous display of contact closures/openings in degrees and voltage and current values.

The instrument is completed with special long calipers to be conveniently connected to some OLTCs (in this case, it is not necessary to drain oil from the contactor tank).

The instrument may be connected to the on-load tap changer with measuring cables provided with alligator clips without contact calipers with oil being partially drained from the contactor tank or removal of the OLTC from the transformer tank.

PKR-2М is equipped with inbuilt battery, which makes it more mobile and easy to use. The inbuilt battery enables to use the instrument during the entire workday without recharge on the vast territory of substation or workshop, which does not require the use of the power supply cable, mains socket extension cord and grounding.

The instrument is equipped with a large color high-brightness and high-contrast display facilitating the graph processing to present information in graphical or tabular form.

The measurement results are stored in the non-volatile memory of the instrument, on the external flesh memory, and they may be transferred to the computer.

Therefore, the instrument may be controlled by the PC. It enables to measure diagrams being inside a car with the computer, which is important in winter.

  PKR-2 PKR-2M
OLTC check mode
demountable
demountable and in-place*
Inbuilt battery supply
none
available
(operation time from 2 to 16 h)

*In-place check mode enables to conduct the in-place diagnostics of OLTCs with current-limiting resistors with the contactor tank cover in place. This mode is based on the DRM method (see above) and consists in measurement of current intensity through the winding, in which the OLTC is switched on.

Specifications Value
Time interval measuring range, sec 0.01 ÷ 1200
Maximum permissible intrinsic absolute error of time interval measurement, sec ±(3+tx)×10-4
Time interval measurement resolution ability, ms ±0.1
Angular movement measuring range, degrees 2 ÷ 360
Maximum permissible intrinsic absolute error of angular movement measurement, degrees ±0.56
Direct current intensity measuring range, А 1 ÷ 4
Maximum permissible intrinsic relative error of direct current intensity measurement, % ±2
Direct current electric voltage measuring range, V 1 ÷ 20
Maximum permissible intrinsic relative error of direct current electric voltage measurement, % ±5
Direct current electric voltage measurement range, Ohm 1 ÷ 20
Maximum permissible intrinsic relative error of direct current electric resistance, % ±5
Resistance measurement sampling rate per channel, kHz 10 ±0.1
Maximum recording time (radial diagram measurement), min 20
Maximum recording time (oscillography using the DRM method), min 20
Number of computer communication channels, pcs. 2 (USB, USB host)
Time of inbuilt battery operation in mixed mode (operation/standby), h 2 ÷ 16
Battery charge time from complete discharge till complete charge, h 2.5
Maximum consumed power in start standby mode, W 15
Maximum consumed power in measurement mode, W 210
Operation temperature range, ºС -20 ÷ +50
IP for transportation IP64
IP rating in operating state IP20
Maximum measuring unit weight, kg 6.1
Dimensions, mm 360×290×165
Interface language English
User manuals language English
Calibration period, year 3

Standard complete set

Photo Item, Index Application
PKR-2М measuring unit
  • PKR-2М measuring unit
  • SKB035.00.00.000-1
  • PKR-2М measuring unit
  • SKB035.00.00.000-1

Instrument and accompanying documents: inbuilt OLTC in-place diagnostics mode (DRM-test), calibration certificate, operation manual, record book, measurement procedure, software (SW) for PC.

Measuring cable with a connector<br>A, B, C poles cables
  • Measuring cable with a connector
    A, B, C poles cables
  • SKB035.34.00.000
    SKB035.34.00.000-01
    SKB035.34.00.000-02
    SKB035.39.00.000
  • Measuring cable with a connector
    A, B, C poles cables
  • SKB035.34.00.000
    SKB035.34.00.000-01
    SKB035.34.00.000-02
    SKB035.39.00.000

Intrusive method of diagnosis. For connection to transformer LTC terminals inside the tank.
Non-destructive method of diagnosis (DRM-test). For connection to transformer terminals up to 200 kV (inclusive).

A short-circuit cable
  • A short-circuit cable
  • SKB035.31.00.000
  • A short-circuit cable
  • SKB035.31.00.000

For in-place check of the transformer OLTCs (DRM-test).

Secondary circuit shorting - alligator type clamps with the jaw of up to 50 mm. To be used for LTCs of power transformers and auto transformers (Length - 12 m).

Angular movement transducer DP22
  • Angular movement transducer DP22
  • SKB035.26.00.000
  • Angular movement transducer DP22
  • SKB035.26.00.000

The transducer enables to measure the angle and speed of the OLTC shaft rotation (complete with data sheet and calibration certificate). Angle measuring range – 0 - 360º (it is necessary to select the appropriate axis from the additional complete set).

Ground clamp
  • Ground clamp
  • SKB035.30.00.000
  • Ground clamp
  • SKB035.30.00.000

To fix the DP22 transducer on the OLTC drive.

Handle
  • Handle
  • SKB028.25.00.000
  • Handle
  • SKB028.25.00.000

To fix the magnetic clamp. Handle for the OLTC shaft rotation. It is used together with axes from the additional complete set.

Axis No.10 together with a bushing
  • Axis No.10 together with a bushing
  • SKB035.25.00.000
    SKB028.25.01.008
  • Axis No.10 together with a bushing
  • SKB035.25.00.000
    SKB028.25.01.008

Axis No. 10 is intended for the OLTC drives of MZ-4.1; M3.2; M3-4 types. It is used for the drive PDP-4U together with bushing SKB035.25.05.000.

Mains cable
  • Mains cable
  • SKB018.09.00.0000
  • Mains cable
  • SKB018.09.00.0000

For connecting the instrument to the power line. Temperature range -15 ÷ +45 ºС (length – 1.5 m).

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

For instrument case grounding. Equipped with a ground clamp and screw end cap. Rated current – 50А (length – 1.8 m).

VP2B-1V-2А cut-out (2 pcs.)
  • VP2B-1V-2А cut-out (2 pcs.)
  • VP2B-1V-2А cut-out (2 pcs.)

For power source protection.

Tool bag
  • Tool bag
  • SKB126.10.00.000
  • Tool bag
  • SKB126.10.00.000

Additional complete set (on order)

Photo Item, Index Application
DRM test lead
  • DRM test lead
  • SKB035.38.00.000
  • DRM test lead
  • SKB035.38.00.000

To be used together with the standard СКБ035.39.00.000 test lead at non-destructive diagnosis (DRM-method) for connection to transformer and to auto transformer terminals above 200 kV. Length - 6 m.

Additional resistor
  • Additional resistor
  • SKB035.40.00.000
  • Additional resistor
  • SKB035.40.00.000

It is applied at OLTC in-place check mode to filter the noises, that appear within the measurement due to transformer self-excitation.

Contact caliper set in a special case
  • Contact caliper set in a special case
  • SKB035.27.00.000
  • Contact caliper set in a special case
  • SKB035.27.00.000

Contact calipers (7 pcs.) for connection to the OLTC contacts without oil discharge. They are supplied in the convenient lockable carrying case.

Axises for setting a measuring sensor DP22 at the output shaft
  • Axises for setting a measuring sensor DP22 at the output shaft
  • Axises for setting a measuring sensor DP22 at the output shaft

Select the axis for setting a measuring sensor DP22 at the output shaft:

  • Axis No. 1 - for OLTC drives of BUL type (СКБ035.25.01.000);
  • Axis No. 2 - for OLTC drives of PDP; МА-1; МAK-1 types (СКБ035.25.02.000);
  • Axis No. 3 - for OLTC drives of PDP; МА-1; MAK-1 types (СКБ035.25.03.000);
  • Axis No. 4 - for OLTC drives of PDP; МА-1; MAK-1 types (СКБ035.25.04.000);
  • Axis No. 6 - for OLTC drives of PDP-4U type (when a manual drive is used) (СКБ035.25.06.000);
  • Axis No. 9 - for OLTC drives of PDP-4U type (when an electric drive is used) (СКБ035.25.09.000);
  • Axis No. 7 - for OLTC drives of MZ-4.1, MZ-4.4 types (when the electric drive is used) (СКБ035.25.07.000);
  • Axis No. 8 - for OLTC drives of MZ-4.1, MZ-4.4 types (when the manual drive is used) (СКБ035.25.08.000);
  • Axis No. 11 - for OLTC drives of SMA-7 (SMS-China), ED 100/200 S, ED 100/200 S types (MR-Germany) (when the manual drive is used) (СКБ035.25.11.000);
  • Axis No. 12 - for OLTC drives of SMA-7 (SMS-China), ED 100/200 S, ED 100/200 S types (MR-Germany) (when the electric drive is used) (СКБ035.25.12.000);
  • Axis No. 13 - for OLTC drives of VAKUTAP type manufactured by MR (СКБ035.25.13.000);

USB 2.0 A-B cable
  • USB 2.0 A-B cable
  • USB 2.0 A-B cable

For the instrument connection to PC (length – 1.8 m).

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

The rod is designed to ensure convenient connection to contacts of a transformer inputs.

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.

Control instrument of OLTC transformers PKR-2
  • Open Original

    Engineering Center EnergoRazvitie, LLC

    EnergoRazvitie Engineering Center, LLC reports that the MIKO-9A, PKR-2M, MIKO-2.3, PKV/M7 instruments operated by our organization, manufactured and delivered by your enterprise, meet the requirements for them. The equipment and functionality of the devices are provided in accordance with the order.

    The MIKO-2.3 instrument and the control instrument for high-voltage circuit breakers PKV/M7 are actively used by our organization in measuring the contact resistance of contacts of high-voltage circuit breakers, disconnectors and other electrical equipment, as well as for monitoring the characteristics of oil, vacuum and gas-insulated circuit breakers. 

    These devices have a number of positive advantages:

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

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

    The PKR-2M instrument is used to check the technical condition of all types of on-load tap-changers, both resistor and reactor ones. The device allows you to check the status of the on-load tap-changer using both collapsible and CIP methods. For example, to diagnose on-load tap-changers with current-limiting resistors, it is not necessary to remove the contactor tank cap (DRM method).

    The presence of a built-in battery increases its mobility and ease of use. Equipped with long probes and a cable with crocodile clamps, it makes it easy to connect to most on-load tap-changers.

    The use of the above instruments allows our specialists to reduce the time of testing and measurement. These devices proved to be positive to use, correspond to the declared characteristics and surpass in many aspects similar devices from other manufacturers.

    IC EnergoRazvitie LLC expresses its gratitude for your work invested in the released devices and looks forward to further fruitful cooperation.

  • Open Original

    Engineering Center EnergoRazvitie, LLC

    EnergoRazvitie Engineering Center, LLC reports that the MIKO-9A, PKR-2M, MIKO-2.3, PKV/M7 instruments operated by our organization, manufactured and delivered by your enterprise, meet the requirements for them. The equipment and functionality of the devices are provided in accordance with the order.

    The MIKO-2.3 instrument and the control instrument for high-voltage circuit breakers PKV/M7 are actively used by our organization in measuring the contact resistance of contacts of high-voltage circuit breakersIn particular, gas-insulated core circuit breakers of the ELF type SP7-2 at 500 kV manufactured by ABB. MIKO-2.3 is convenient to use due to its small size. The current generated by the device allows you to burn through the contact and get stable readings of the transition resistance. The advantage of the device is also the combination of potential and current circuits in two terminals and taking into account the own resistance of the wires included in the kit. In general, MIKO-2.3 allows you to reduce the measurement time and get stable and reliable results. However, it is worth paying attention to the fast discharge of the battery when using a microohmmeter, which determines the dependence of the instrument on the availability of the mains. Test leads for 500 kV circuit breakers must be of a minimum length of 10 meters with reliable and convenient clamps for connection, and this requires additional specification of the order.

    Circuit breaker analyzer PKV/M7 is simple and convenient to operate, it allows you to control the main characteristics of high-voltage switching devices. The positive thing is that in one measurement cycle the device allows you to measure several parameters, which significantly reduces the processing time and assess the technical condition of the circuit breaker. A small number of contact cables and the use of different instrument connectors make it possible to reduce the likelihood of personnel errors when assembling the test circuit. PKV/M7 is a universal device that allows you to control the parameters of high-voltage circuit breakers, and can be safely recommended to organizations involved in the commissioning and operation of high-voltage equipment.

    The MIKO-9A instrument is used to test power transformers and autotransformers. In particular, in May 2020, the device was successfully tested on the ATDCTN-250000/220/110 autotransformer. MIKO-9A is equipped with a wide range of test leads, (it is possible to measure three-phase circuit), which makes it possible to quickly perform a large number of measurements, reducing connection operations, with a minimum of specialists.

    The presence of a built-in high-capacity battery allows measurements in the field, regardless of the availability of the mains. The device is very convenient to use (the presence of automatic mode, an important demagnetization option for the transformer, a convenient and intuitive interface), is small and lightweight.

    The PKR-2M instrument is used to check the technical condition of switching devices of transformers of all types, both resistor and reactor, using the collapsible method, as well as for diagnosing on-load tap-changers with current-limiting resistors without removing the contactor tank cap. The presence of a built-in battery increases its mobility and ease of use. Equipped with long probes (optional) and a cable with crocodile clamps, it makes it easy to connect to most on-load tap-changers.

    The use of these instruments allows our specialists to reduce the time of testing and measurement. These devices these devices are good to use, correspond to the declared characteristics and surpass in many aspects similar devices from other manufacturers.

  • Open Original

    "Belenergoremont" branch of "Belenergoremnaladka", JSC

    Since 2018,the Belenergoremont" branch of "Belenergoremnaladka", JSC has been operating an OLTC analyzer PKR-2 device.

    During the entire life of the specified device, there were no facts of incorrect operation. The equipment has established itself as reliable, unpretentious and easy to operate

    As necessary, service, warranty, as well as qualified support in the operation of the device are provided by the supplier of NPP Belenergokip promptly and in full.

We use cookies. By continuing to browse the site, you agree to the processing of your personal data and the Privacy policy.