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  4. Voltage range 17.5-24 kV
  5. Current transformer TOLU-17.5
+38 098 606-33-15 +38 050 155-21-51 Viber +38 098 606-33-15 Whatsap

Current transformer TOLU-17.5

The current transformer TOLU-17.5, which you can buy on our website, is used to protect, automate the network and take measurements using measuring instruments.

This device changes the strength of the signal passing through the network to a level that allows you to work with it in the presence of equipment. Thus, this transformer is able to transmit the signal of measuring instruments or automation equipment. It is used in AC installations, operating with an electric charge of up to 17.5 kV and a frequency of 50 Hz.

It is available in the climatic version "U". Installation category 2.1, according to DSTU 15150-69. The durability of use without changing the initial operational properties (possibility and accuracy of signal transmission) is ensured by the use of nanocrystalline material in the manufacture of the core.

  • Survey letter
Type examination certificate (Module B) No. UA.TR.001 150-19 Rev.2, reference number 29/3/B/12/016-20. Complies with DSTU EN 61869-2:2017.

Technical specifications

Parameter nameValue
Maximum operating voltage, kV17,5
Rated primary current, A5, 10, 15, 20, 30, 40, 50, 75, 100, 150, 200, 300, 400, 500, 600, 800, 1000, 1500, 2000, 2500, 3000
Rated secondary current, A1;5
Rated frequency, Hz50
Number of secondary windings2, 3
Accuracy class of the secondary winding: - for measurement; - for protection;0,2S; 0,5; 0,5S;0,5S+ / 5P;10P
Rated secondary load at ss φ = 0.8, VxA winding: - for measurements; - for protection;10 / 15
Rated primary current, A51015203040507510015020030040050060080010001500200025003000
Rated short-term thermal resistance current, Ith, kA0,61,31,32,63,33,33,77,77,414,414,428,828,836368686108108108108
Rated current strength of dynamic stability Idyn, kA1,63,33,36,58,38,39,318,518,5363672729090215215270270270270
Safety factor of the device, FS, not more than333333333333334555555
Safety factor of the device, FS, not more than7777788787878899910131313


It is possible to supply a cover to protect the secondary winding terminals from unauthorized access (sealing) as part of the transformer package - if specified in the supply contract.

* Transformers with rated secondary load up to 30 VxA can be supplied (please specify when ordering).

** Transformers with a maximum accuracy factor of at least 10 can be supplied (specify when ordering).

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