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  4. Voltage range 6-12 kV
  5. Current transformer TOLU-10-4

Current transformer TOLU-10-4

Current transformers are designed to transmit measurement information signals to measuring instruments, protection and control devices, to isolate secondary connection circuits from high voltage in AC installations for the maximum voltage of 12 kV with a frequency of 50 Hz.

The transformer is manufactured in the U version of the installation category 2 according to GOST 15150-69. The operating position of transformers in space is any. The cores of the winding for measurement are made of nanocrystalline alloy, which guarantees the preservation of metrological characteristics for 50 years and excludes the possibility of magnetization of the core.

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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
Rated voltage kV10
Maximum operating voltage, kV12
Rated primary current, A5, 10, 15, 20, 30, 40, 50, 75, 100, 150, 200, 300, 400, 500, 600, 800, 1000, 1500, 2000, 2500, 3000, 4000
Rated secondary current, A1;5
Rated frequency, Hz50
Number of windings2; 3; 4
Accuracy class of the secondary winding: - for measurement; - for protection;0,2S; 0,5; 0,5S; 0,5S+ / 5Р; 10P
Rated secondary load at cos φ = 0.8, VxA winding: - for measurement; - for protection;10/15
Rated primary voltage, A5101520304050751001502003004005006008001000150020002500-4000
Rated short-term thermal resistance current, Ith, kA0,61,31,32,63,33,33,77,77,414,414,428,828,836368686108108172
Rated current strength of dynamic stability Idyn, kA1,63,33,36,58,38,39,318,518,5363672729090215215270270430
Коефіцієнт безпеки приладу, FS, не більше33333333333333455555
Safety factor of the device, FS, not more than77777887878788999101313


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 V-A 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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