Traction transformers in particular are subject to stringent minimum dimensional requirements and high peak loads. In addition to the high requirements for optimum design, these transformers also fulfil the highest requirements in terms of fire safety. High-temperature insulating liquid and aramid insulation paper are used in these transformers.
ETD is manufacturing transformers and chokes for railway vehicles for the Czech railway company České dráhy a.s. but sells these products to other companies abroad as well.