Steam-Resistivity of Synthetic Insulation Materials Used In Low-Voltage Motors

Traditional insulating materials used in low-voltage machines cannot normally withstand steam, because of the stress caused by high temperature and humidity at the same time. The property data found in literature for insulating materials do not usually include information on the material steam resistance. In this work various materials were tested in pressurized hot water, which influenced the material instead of steam. Suitable materials for each part of a low-voltage insulation system were found for 115 °C rated operating temperature.