Transformer OLTC diagnostic system PKR-2

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
  • Russian Register of Innovative Products
  • Recommended for use in JSC Russian Railways electric installations
  • PJSC ROSSETI Register of Innovative Solutions

OLTC maintenance check

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Resistor type OLTC contactor switchover oscillography

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Circular diagram recording of the resistor and reactor type OLTCs

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Automatic self-adjustment to OLTC

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Reactor type OLTC check in "static" mode

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Ergonomic probes or crocodile clamp cable

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Storage, transfer and analysis of measurement results

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High safety level during operation

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The instrument is represented in two modifications

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PKR-2 is intended for demountable diagnostics of OLTC of all types (both resistor and reactor type) being a part of and not included in a power transformer.

PKR-2 enables diagnostic of OLTC devices manufactured by: Huaming, MR, ABB, Hyundai Heavy Industries-Bulgaria.

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

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

All characteristics are taken:

PKR-2 is completed with a special transducer for circular diagram recording. 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 protrusion.

All characteristics are taken:

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

Reactor OLTCs can be checked in a static mode with the help of PKR-2 device. The user rotates the drive shaft with the handle from the standard complete set in slow motion. And at this time the moments of contacts closing / opening are displayed on the display of the device in degrees and in values of voltage and current.

For the convenience of direct connection to the contacts of the OLTC, when the tank is opened with partial or complete oil drain, PKR-2 is equipped with special long probes.

Without contact probes connection to the OLTC can be done by using a cable with crocodile clamps. In this case, partial or complete oil drain should be carried out from the contactor tank, or OLTC should be completely removed from the transformer tank.

The instrument is equipped with a large sensor color graphic display that enables to represent information in graphical or tabular form. High brightness and contrast make it easier to process the graphs.

Measurement results are stored in the non-volatile memory of the instrument, or they may be transferred to the PC.

Moreover, the instrument may be controlled by instrument keyboard, sensor display, or PC. The last mentioned function allows you to record diagrams while sitting with a PC in a car, which is important and comfortable during the cold season.

The instrument meets the electromagnetic compatibility requirements to Class A equipment according to GOST R 51522.1-2011.

The instrument meets the safety requirements to electric control and measuring instruments and laboratory equipment according to GOST R52319-2005.

  PKR-2 PKR-2M
OLTC check mode
demountable
demountable and non-demountable (DRM method)*
Built-in battery supply
none
available
(operation time from 2 to 16 h)

*Non-demountable check mode enables to conduct the in-place diagnostic of OLTCs with current-limiting resistors without opening the contactor tank cover. This mode is based on the DRM method (Dynamic Resistance Measurement) and consists in measurement of current intensity through the winding, in which the OLTC is switched on.

Specifications Value
Time interval measuring range 0.01 - 1200 s
Accuracy ±(3 + tx) × 10-4,
where tx - measured time interval, sec
Resolution ±0.1 ms
Angular movement measuring range 2 - 360 º
Accuracy ±0.56 º
Measuring range of DC current 1 - 4 А
Measuring range of DC electric voltage 1 - 20 V
Measuring range of DC electrical resistance 1 - 20 Ω
Accuracy ±5 %
Sampling frequency of resistance measurement per channel 10 ±0.1 kHz
Maximum circular diagram registration time 20 min
PC connection USB
Display TFT color graphic multi touch,
640 x 480 pixels
Maximum power consumption in standby mode 15 W
Maximum power consumption in measurement mode 210 W
Power supply (mains voltage) 150-242 V AC, 47-63 Hz
150-300 V DC
Operation temperature range -20ºС - +40ºС
Environmental protection IP 64 (device cover closed)
IP 20 (device cover open)
Maximum measuring unit weight 5.1 kg
Dimensions 360 x 290 x 165 mm
Interface and user manual language English
Warranty 3 years
Calibration period 3 years

Standard complete set

Photo Item, Index Application
Main instrument PKR-2
  • Main instrument PKR-2
  • 035.00.00.000
  • Main instrument PKR-2
  • 035.00.00.000

Instrument and accompanying documents: Calibration Certificate, User Manual, Log Book, PC software.

Test cable with a connector<br>and A, B, C pole cables
  • Test cable with a connector
    and A, B, C pole cables
  • 035.34.00.000
    035.34.00.000-01
    035.34.00.000-02
    035.39.00.000
  • Test cable with a connector
    and A, B, C pole cables
  • 035.34.00.000
    035.34.00.000-01
    035.34.00.000-02
    035.39.00.000

Test cable with connector 1 x 8 m. A, B, C pole cables 3 x 1.5 m with jaw up to 25 mm.

This cable is used in the demountable diagnostic mode to connect to the contacts of the transformer OLTC inside the tank, as well as in the non-demountable diagnostic mode (DRM test) to connect to the inputs of transformers up to 220 kV.

For connection to the inputs of transformers above 220 kv and autotransformers select 035.38.00.000 test cable with clamps, that is used with 035.39.00.000 connector.

Angular movement transducer DP22
  • Angular movement transducer DP22
  • 035.26.00.000
  • Angular movement transducer DP22
  • 035.26.00.000

The transducer enables to measure the angle and speed of the OLTC shaft rotation. Angle measuring range – 2 - 360º (it is necessary to select an appropriate axis from the additional complete set).

C-clamp
  • C-clamp
  • 035.30.00.000
  • C-clamp
  • 035.30.00.000

To fix the DP22 transducer on the OLTC drive.

Handle
  • Handle
  • 028.25.02.000
  • Handle
  • 028.25.02.000

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

Axis No.10 together with a bushing
  • Axis No.10 together with a bushing
  • 035.25.00.000
    028.25.01.008
  • Axis No.10 together with a bushing
  • 035.25.00.000
    028.25.01.008

Axis No. 10 for the OLTC drives of the MZ-4.1; M3.2; M3-4 type. For the drive of PDP-4U type this axis is used together with the bushing.

Axises for other drives are represented in the additional complete set.

Mains cable
  • Mains cable
  • 018.09.00.000
  • Mains cable
  • 018.09.00.000

For connecting the instrument to the power supply. Temperature range -15ºС - +45ºС (length – 2 m).

Ground cable
  • Ground cable
  • 010.01.00.000
  • Ground cable
  • 010.01.00.000

For instrument case grounding. Equipped with a ground clamp and screw end cap. Nominal current – 50 А (length – 2 m).

Fuses
  • Fuses
  • Fuses

Type VP2B-1V-2A (ВП2Б-1В-2А) (2 pcs) to protect the power source.

Tool bag
  • Tool bag
  • 126.06.00.000
  • Tool bag
  • 126.06.00.000

Robust, convenient, wear proof bag for transportation of cables, documentation, and other accessories to PKR-2. The bag is especially useful when the set is carried to an object, so that all the needed accessories are kept together.
Weight 0.6 kg.

Additional complete set (on order)

Photo Item, Index Application
Contact probes set in a special case
  • Contact probes set in a special case
  • 035.27.00.000
  • Contact probes set in a special case
  • 035.27.00.000

Contact probes 7 x 0.85 m for connecting to the OLTC contacts without or with partial oil drain. When assembled with an extension cable, the length increases to 1.55 m.
The probes are supplied in the convenient carrying case.

Axes for DP22 transducer fixation to the output shaft
  • Axes for DP22 transducer fixation to the output shaft
  • Axes for DP22 transducer fixation to the output shaft

Select the axis for DP22 transducer fixation to the output shaft:

  • Axis No. 1 - for OLTC drives of BUL type (035.25.01.000);
  • Axis No. 2 - for OLTC drives of PDP, МА-1, МAK-1 types (035.25.02.000);
  • Axis No. 3 - for OLTC drives of PDP, МА-1, MAK-1 types (035.25.03.000);
  • Axis No. 4 - for OLTC drives of PDP, МА-1, MAK-1 types (035.25.04.000);
  • Axis No. 6 - for OLTC drives of PDP-4U type (when a manual drive is used) (035.25.06.000);
  • Axis No. 9 - for OLTC drives of PDP-4U type (when an electric drive is used) (035.25.09.000);
  • Axis No. 7 - for OLTC drives of MZ-4.1, MZ-4.4 types (when the electric drive is used) (035.25.07.000);
  • Axis No. 8 - for OLTC drives of MZ-4.1, MZ-4.4 types (when the manual drive is used) (035.25.08.000);
  • 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) (035.25.11.000);
  • 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) (035.25.12.000);
  • Axis No. 13 - for OLTC drives of VAKUTAP type manufactured by MR (035.25.13.000).

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).

Software for DRM mode activation
  • Software for DRM mode activation
  • Software for DRM mode activation

Non-demountable diagnostic of OLTCs (DRM method) allows to check the technical condition of OLTCs with current-limiting resistors without removing contactor tank cover and oil draining.

To work in non-demountable mode (DRM method), it is necessary to purchase (activate) a software for DRM and order a short-circuit cable.

Manipulating rod
  • Manipulating rod
  • 010.41.00.000
    010.41.00.000-01
    010.41.00.000-02
  • Manipulating rod
  • 010.41.00.000
    010.41.00.000-01
    010.41.00.000-02

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 100 A in the presence of a good contact.

OLTC analyzer PKR-2
  • 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

    CAPITAL-STROY DIAGNOSTIKA, LLC

    PKR-2 analyzer for diagnosis of transformer OLTC was procured by our company in 2014. Measurements were started in 2015. Measurements were performed on 110kV transformers with OLTS of РНТ-13, РНТ-20, РС-3, РС-4, and РС-9 types.

    The instrument is easy to use, it has many useful functions. The  PKR-2 allowed identification of the following problems of the OLTC operation:

    • Wear of arch extinguishing contacts;
    • Resistors damage;
    • Unacceptable travels in the shaft fixing nodes;
    • Shaft shifts;
    • Incorrect connection of taps. 


    Measurements using PKR-2 were two or three times faster than those by conventional methods. The instrument is rather convenient in operation.

    The analyzer can be recommended to other companies for use.

  • Open Original

    Irkutsk State Technical University

    In the period between August 9-11 the Research Laboratory for Electric Equipment Testing of the Irkutsk State Technical University performed diagnosis of a block-type TDTNG 75000/110 transformer at a thermal power plant TPP-9 of OJSC Irkutskenergo using your instruments. Resistances of transformer windings were measured using the MIKO-8 microohmmeter. Circular diagrams of LTC transformer were obtained using PKR-2 instrument.

    It should be noted that the instruments are of high quality, they are compact and have a number of advantages over similar instruments of other firms (particularly, user-friendly interface, ability to review curves of the instrument signal on site).

    On the whole the instruments were highly appraised by our specialists.

  • 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.

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