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

Current transformer TPOLU-10

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 7-20 Rev.0, reference number 29/3/B/12/219-19. 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
Rated secondary current, A1;5
Rated frequency, Hz50
Number of secondary windings2, 3, 4
Accuracy class of the secondary winding: - for measurement; - for protection;0,2S; 0,5; 0,5S;0,5S+ / 5P;10P
Rated secondary load at cos φ = 0.8, V-A winding: - for measurement; - 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
Ultimate accuracy factor, ALF, not less than **7777788787878899910131313

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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