Reference type current transformer TPL-12

Current transformers TPL-12-V1 and TPL-12-V2 are designed to convert alternating current for the purpose of its further measurement and (or) transmission of a measurement information signal to measuring instruments and (or) protection and control devices to isolate secondary circuits from high voltage in AC electrical installations for the highest voltage of 12 kV (rated voltage 10 kV) with a frequency of 50 or 60 Hz.

The main consumers of transformers are:

  - power stations and other energy enterprises;

  - manufacturing enterprises of various industries.

The transformers are intended for indoor installation and must comply with the type of climatic modification U and placement category 2 in accordance with GOST 15150. According to DSTU EN 61869-1:2017, DSTU EN 61869-2:2017, the category of transformers in terms of atmospheric air temperature is “-40/40” .

Transformers are designed to operate under the following conditions:

  - ambient air temperature from minus 45 °С to plus 40 °С;

  - the average value of relative humidity, measured over 24 hours, must not exceed 95%

  - height above sea level up to 1000 m;

  - working position of current transformers in space - any.

  - the environment is not explosive, does not contain conductive dust, chemically active and aggressive gases, vapors and salts in concentrations that destroy metal coatings and insulation (type II atmosphere according to GOST 15150).

Technical data TPL-12-V1:

Transformers are manufactured according to TU U 27.1-30493112-001:2015 in accordance with DSTU EN 61869-1:2017, DSTU EN 61869-2:2017. Transformer insulation based on epoxy complies with the requirements of IEC 6008.

  - Electrical strength, kV/mm, not less than - 27

  - Specific volume electrical resistance, Ohm * m, not less than - 1.6x1013

  - Specific surface electrical resistance, Ohm, not less than -1.0x1016

  - Breaking stress in bending, MPa - 67

  - Charpy impact strength, kJ/m2 - 5.5

  - The level of partial discharges of the insulation of the primary winding does not exceed 20 pC at a voltage of 7.62 kV

  - Heating transformers comply with the requirements of DSTU IEC 60044-1 in terms of heat resistance class "B" (130 °C) according to GOST 8865 (IEC 85)1).

  Main technical characteristics of TPL-12-V1:

  - Rated voltage, kV - 10

  - Rated constant maximum voltage, kV - 12

  - RMS test voltage value 50.60 Hz for 1 minute, kV - 42

  - Amplitude value of lightning impulse voltage, kV - 70

  - Rated primary current, A - 10,15,20,30,40,50,75,100,150,200,300,400,600

  - Rated secondary current, A - 5

  - Rated frequency, Hz - 50.60

  - Accuracy class of the secondary winding for measurement, - 0.5S; 0.5

  - Accuracy class of the secondary winding for protection, - 10Р

  - Weight, kg 15

Technical data TPL-12-V2

Transformers are manufactured according to TU U 27.1-30493112-001:2015 in accordance with DSTU EN 61869-1:2017, DSTU EN 61869-2:2017.

The insulation complies with the requirements of IEC 6008.

The level of partial discharges of the insulation of the primary winding does not exceed 20 pC at a voltage of 7.62 kV

Heating transformers comply with the requirements of DSTU IEC 60044-1 in terms of heat resistance class "B" (130 °C) according to GOST 8865 (IEC 85)1).

Main technical characteristics of TPL-12-V2:

  - Rated voltage, kV - 10

  - Rated constant maximum voltage, kV - 12

  - RMS test voltage value 50.60 Hz for 1 minute, kV - 42

  - Amplitude value of lightning impulse voltage, kV - 70

  - Rated primary current, A - 10,15,20,30,40,50,75,100,150,200,300,400,500,600,750,800,1000

  - Rated secondary current, A - 5

  - Rated frequency, Hz - 50.60

  - Accuracy class of the secondary winding for measurement, - 0.2S; 0.2; 0.5S; 0.5

  - Accuracy class of the secondary winding for protection, - 5P, 10P

  - Weight, kg 15

Thermal and thermodynamic resistance currents TPL-12-V1 and TPL-12-V2 (in the table in the photo)

Transformers are made in the form of a supporting structure. General view of transformers, overall and connecting dimensions are shown in the photo below. The body of the transformers is made of an epoxy-based compound, which is both the main insulation and provides protection against mechanical and climatic influences. The outputs of the primary winding are located on the upper surface of the transformers. The secondary windings are located, each on its own magnetic circuit. The outputs of the secondary windings can have several placement options, on the side or at the bottom of the transformers.

The marking of transformers complies with the requirements of DSTU EN 61869-1:2017, DSTU EN 61869-2:2017, DSTU 4171 and GOST 18620, while a marking plate is installed on the transformers.

The marking of the conclusions of the primary winding is made with the signs "P1", "P2", and the conclusions of the secondary winding - "1S1", "1S2", "2S1", "2S2".

Placement and installation, operation and repair of the transformer

Transformers are installed in KRU, KRUN and KSO cabinets in accordance with the requirements of design documentation. the transformers are fastened with four M12 bolts to the mounting brackets at the bottom of the product. During installation, it is necessary to remove the oxide film from the current-carrying busbars and the primary contacts of the product. The wires connected to the secondary terminals of the transformers must be rolled under the M10 screw and tinned or have a ferrule. During installation, the direction of current should be taken into account from P1 to P2 in the primary winding, and from 1S1 to 1S2, from 2S1 to 2S2 in the secondary winding, respectively. During operation, the possibility of opening the secondary circuits of the transformer must be excluded. For ease of movement, it is allowed to hold the transformer by the molding ledges located on the sides of the transformer. And also use eyebolts screwed into the primary contacts. The operation of transformers must be carried out in accordance with NPAOP 40.1-1.01, NPAOP 40.1-1.21, GKD 34.20.507, "Rules for the technical operation of electrical installations of spares", PUE and the requirements of the manufacturer's operational documentation. Transformers are subject to partial repair. (calibration of the accuracy class of the transformer) Transformers during operation are subject to verification in accordance with the requirements of DSTU 6097.

Security measures

The design of transformers complies with the safety requirements set forth in GOST 12.2.007.0, GOST 12.2.007.3. Installation, adjustment and commissioning of transformers must be carried out taking into account the safety requirements for equipment grounding, resistance and dielectric strength of insulation in accordance with the requirements of the following documents:

  - PUE;

  - Rules for the technical operation of electrical installations of spares;

  - SNIP 3.05.06;

  - NPAOP 40.1-1.01;

  - NPAOP 40.1-1.21;

  - NAPB A.01.001;

  - GKD 34.20.5071);

  - operating documents for the transformer.

According to the method of protecting a person from electric shock, the transformers correspond to class II according to GOST 12.2.007.0. It is not allowed to make any switching in the secondary circuits of the transformer without making sure that the voltage is removed from the primary winding. During operation, the secondary winding must be closed to the load, in the absence of a load that closes the secondary circuit, it is closed with a copper conductor D 1.8 mm.

Maintenance

It is carried out within the time limits provided for the installation into which the transformer is built. Produced in the following volume:

  - cleaning the transformer from dust and dirt

  - inspection of the transformer for damage

  - measurement of insulation resistance of secondary windings. The resistance must be at least 50 MΩ. Measure with a 1000V megger

  - if as a result of the checks any malfunctions are found that prevent the operation of the transformer, then it must be replaced. The average service life of a transformer is 25 years.

We deliver orders throughout Ukraine, except temporarily occupied territories and war zones. Delivery is carried out by transport and logistics companies chosen by you.

The terms of delivery of the order depend on the availability of goods in the warehouse. If at the time of placing the order, all the selected goods are available, then we will deliver the order within a few days, depending on the remoteness of your region. If the ordered product is not in stock, the maximum delivery time of the order may be several weeks. But we try to deliver orders to customers as quickly as possible, and 90% of customer orders are shipped within the first almost immediately. In the event that part of the goods from your order did not arrive at the warehouse after the specified period during the discussion with the manager, we will definitely inform you about it.

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