Record time certification of SGB VPI transformers
SGB-SMIT's Vacuum Pressure Impregnated (VPI) - triangular core transformer received the UL-certification in record time.
Image source: SGM SMIT
USA: SGB-SMIT’s Vacuum Pressure Impregnated (VPI) – triangular core transformer received the UL-certification in record time.
VPI – triangular core transformer is a new technology introduced by SGB USA in the North American market.
It is the economical choice for moderate to harsh environments and can be used in indoor (NEMA 1) or outdoor (NEMA 3R) applications. Typical usage in most commercial and industrial applications.
Advancements in manufacturing techniques and the increased performance demands have paved the way for making this cutting-edge triangular wound technology possible.
The symmetrical structure produces great savings and benefits in areas such as footprint, weight, reduction in sound levels, harmonic content, stray magnetic fields, improved efficiency levels, and life expectancy extension when comparing a conventional (3-legged stacked core) against a symmetrical triangular (wound core).
Regarding the efficiency levels, it is to be explicitly emphasized, that reductions of 20 % in no-load and 5 % in load losses compared to traditional technologies were confirmed.
Compact core VPI transformers can be built up to 3,000 kVA with primary voltages from 600 V – 27 kV and secondary voltages up to 1000 V with an insulation system of 220 °C.
The certification process officially began on 21 October, 2019 and finished on 2 February, 2020. The full certification process was accomplished in only 14 weeks on the very first units that were manufactured at the SGB USA Tallmadge site.
SGB USA is now in full compliance to the North-American requirements and is looking forward to demonstrating the advantages of its technology to their customers.
Source: SGM-Smit