ZAVN-Dobrich AD +359 58 / 600 647
БГ EN
  1. Products
7.2 · 12 · 24 kV

Medium-voltage voltage transformers

For rated operating voltages of 6, 6.3, 10, 15 and 20 kV, for installation in indoor switchgear. Unearthed (two-pole) and earthed (single-pole) versions.

Construction

The transformers have a laminated core of electrical steel. The LV winding is wound on the core and the HV primary winding, made of separate sections, is fitted over it. The active part is cast in epoxy resin compound of insulation class F. The transformers meet the requirements of BDS EN 60044-2.

Operating conditions

  • Ambient temperature−25 to +40 °C
  • Altitudeup to 1000 m
  • Climatenormal and tropical climate versions
Technical data of the NK series
TypeRated primary voltage Upn, kVRatio Upn / Usn, kVOutput, rated / limit Pn / Ppr, VAAccuracy classMass, kg
NK-7.266 / 0.1100 / 4000.527
NK-7.26.36.3 / 0.1100 / 4000.527
NK-I-7.26 : √36:√3 / 0.1:√3 / 0.1:350 / 2000.526.5
NK-I-7.26.3 : √36:√3 / 0.1:√3 / 0.1:350 / 2000.526.5
NK-121010 / 0.1100 / 5000.527
NK-121111 / 0.1100 / 5000.527
NK-121111 / 0.1180 / 5000.527
NK-I-1210 : √310:√3 / 0.1:√3 / 0.1:350 / 3000.526.5
NK-I-1210.5 : √310.5:√3 / 0.1:√3 / 0.1:350 / 3000.526.5
NK-I-1211 : √311:√3 / 0.1:√3 / 0.1:350 / 3000.526.5
NK-I-1211 : √311:√3 / 0.11:√3 / 0.11:350 / 3000.526.5
NK-241515 / 0.1120 / 7500.540
NK-242020 / 0.1120 / 7500.540
NK-I-2415 : √315:√3 / 0.1:√3 / 0.1:360 / 5000.540
NK-I-2420 : √320:√3 / 0.1:√3 / 0.1:360 / 5000.540

ZAVN-Dobrich AD can make these voltage transformer designs with other technical parameters (accuracy class, rated primary and secondary voltage and so on) to BDS, IEC and GOST, to the client's order.

The type-approval certificates of NK and NK-I are on the Documents page.

The other products

All products

Privacy