Tri-phase low frequency laminated transformers
- Technology
- Low frequency laminated transformers
- Partner
- Noratel
Noratel’s tri-phase transformers delivery program includes low voltage isolating transformers up to 4MVA, various degrees of protection, from IP00 up to IP66, cast resin power transformers with maximum service voltages up to 22kV, three-winding power transformers for rectifiers on ships, and custom-designed three-phase transformers and production in large series.
Test and documentation according to demanding shipping and offshore standards.

Range features
A high level overview of what this range offers
- Input voltages from 3x 115V to 3x 1000V
- Frequency 47-63Hz
- Output voltages from 3x 115V to 3x 1000V
- Power range up to 4 MVA, 47-63Hz
- Vector groups: Dyn11 (standard), Dyb5, Ynd1, and Ynd5
- Degree of protection: open (IP00) and capsulated (IP23 to IP66)
- Construction class: I
- Built according to: EN61558-2-4, UL506, UL file no. E305755, D.N.V, IEC60726/ IEC60076, e.a
- Insulation class: B (130°C), F (155°C)
- Ambient temperature (t a ): 40°C (D.N.V)
- Connections: terminal block ore Cu-bars
- Custom designed types with other voltages, frequencies, an electrostatic shield between primary and secondary, regulations, tappings, temperature control units with alarm or trip [TC], PT100 sensors [PT], RTD sensors [RTD] or other features are available on request
What’s in this range?
All the variants in the range and a comparison of what they offer
Model | Power (VA) | Voltage primary – secondary (V) | Current sec. (A) | Dimensions (L x W x H) |
---|---|---|---|---|
3LT10-400400-00 | 10kVA | P: 3 x 400V S: 3 x 400V | 3 x 14.43A | 360 x 243 x 380mm |
3LT30-490230-23 | 30kVA | P: 3 x 490V S: 3 x 230V | 3 x 75.30A | 599 x 550 x 630mm |
3LT80-690400-54 | 63 kVA (class F) 70kVA (class H) | P: 3 x 690V S: 3 x 400V | 3 x 90.93A (class F) 3 x 101.04A (class H) | 660 x 520 x 877mm |