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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 | |
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OLTC check mode |
demountable |
demountable and non-demountable (DRM method)* |
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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.
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Instrument and accompanying documents: Calibration Certificate, User Manual, Log Book, PC software. |
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Test cable with connector 1 x 8 m. A, B, C pole cables 3 x 1.5 m with jaw up to 30 mm. |
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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). |
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To fix the DP22 transducer on the OLTC drive. |
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To fix the magnetic clamp. |
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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. |
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For connecting the instrument to the power supply. Temperature range -15ºС - +45ºС (length – 2 m). |
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For instrument case grounding. Equipped with a ground clamp and screw end cap. Nominal current – 50 А (length – 2 m). |
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Type VP2B-1V-2A (ВП2Б-1В-2А) (2 pcs) to protect the power source. |
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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. |
| Photo | Item, Index | Application |
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For the instrument connection to PC (length – 1.8 m). |
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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. |
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Modular probes 7 x 1.7 m (diameter of each: 9 mm) for connection to the contacts of OLTC during the demountable diagnostics. Removable contact tips are in two versions: sharp cone-shaped and in a form of spring-loaded gripper. |
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Select the axis for DP22 transducer fixation to the output shaft:
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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.
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We are announcing the implementation of new probes for demountable diagnostics of OLTCs devices. Successful tests on OLTC 35/1000.
16 june 2023
Since 2018, specialists of the Republic of Belarus have been actively using an OLTC analyzer PKR-2 device.
Diagnostic with a universal instrument in time will allow you to assess the condition of the device, localize defects or malfunctions and check the equipment after repair
18 october 2023
SKB EP company implements 2 specialized instruments for OLTC diagnostic - PKR-2 and PKR-2M, as well as 2 instruments MIKO-9A and MIKO-8M(A), where diagnostic of this mechanism is realized as an additional mode. In the summary comparison table, the differences between the instruments are considered.
21 june 2022We hope that next time you will be able to participate.
Our manager will contact you shortly to clarify the data.
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