Transformers

The Cast Resin Transformers of up to 5000 kVA are manufactured at the Legrand-TBS plant; a joint venture between Legrand and Bahra Electric.

These high-quality Cast Resin Transformers are the ideal choice for all needs, with advantages like:

  • Total safety for the customer, guaranteed by the total absence of combustible products
  • Maximum environmental protection, thanks to the absence of polluting and flammable insulating liquids
  • Energy saving, with the exclusive “reduced loss” range
  • Maximum flexibility straight from the beginning of the installation
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Cast Resin Transformers
Up to 5000 kVA

Range

  • NL – Normal losses
  • RL – Reduced losses (High Efficiency)

Materials of Windings: Copper (Cu) & Aluminum (Al)

  • Rating (kVA): 100–5000
  • Frequency (Hz): 50/60
  • Tapping links, HV side: ± 2 x 2.5%
  • Thermal class of the insulating system: 155 °C (F) / 155 °C (F)
  • Temperature rise: 100/100 K
  • Class of use: E2-C2-F1 Certified CESI A9032391 IEC 60076-11
  • Tolerances: According to IEC /CEI
  • Partial discharge < 10 pC
Compliance
  • IEC 60076-11/IEC 60068-3-3
  • IEC 60529
  • IEC 60616/IEC 61678/IEC 62032
Certifications
  • Fully TYpe Tested – CESI Italy
  • E2-C2-F1 Certified CESI A9032391
  • SASO
  • Seismic
Protection
  • IP-23/31
12 kV Insulation
  • Primary voltages (kV): 6-10-11. Insulation class: 12 kV BIL 60 kV
  • (BIL 75 kV available on request)
  • Secondary voltages no-load (V): 400-433 (insulation class 1.1 kV)
17.5 kV Insulation
  • Primary voltages (kV): 12-13.8-15. Insulation class: 17.5 kV BIL 75 kV
  • (BIL 95 kV available on request)
  • Secondary voltages no-load (V): 400-410-420 (insulation class 1.1 kV)
24 kV Insulation
  • Primary voltages (kV): 20-23. Insulation class: 24 kV BIL 95 kV
  • (BIL 125 kV available on request)
  • Secondary voltages no-load (V): 400-410-420 (insulation class 1.1 kV)
36 kV Insulation
  • Primary voltages (kV): 25-33. Insulation class: 36 kV BIL 170 kV
  • Secondary voltages no-load (V): 400-420 (insulation class 1.1 kV)

Production

Standard Transformers
  • Rated power: 100 – 3150 kVA
  • Primary rated voltage: up to 36kV
  • Secondary rated voltage: up to 433V
Special Transformers
  • Rated power: up to 5 MVA
  • Primary insulation level: up to 36kV
  • Secondary insulation level: on request

Standard Equipment

  • HV terminals (n°3 pieces)
  • LV bar terminals (n°4 pieces)
  • Off load tapping links (n°3 pieces)
  • Rating plate (n°1 pieces)
  • Lifting lugs (n°4 pieces)
  • Earth terminals (n°2 pieces)
  • Orientable rollers (n°4 pieces)

Accessories

  • Pt100 thermosensors with connection box
  • PTC thermistors (as an alternative to the Pt100 thermosensors)
  • Electronic unit for thermal control, with inputs for Pt100 and temperature display
  • Electronic unit for thermal control, with inputs for PTC, without temperature display
  • Forced ventilation systems (for temporary power increase)
  • Electronic unit for ventilation system
  • Transformer protective enclosure (degree protection IP23 & IP31)
  • Surge arresters kit
  • Antivibration pads

Special Requirements:

  • HV terminals for plug-in connections (Elastimold)
  • Antiseismic frame (in base of level of earthquake)
  • OLTC (On-Load Tap-Changers)
  • CT and VT instrument transformer