Oil & Winding Temperature Indicators


These are capillary dial type thermometers, the bulbs of which are immersed in oil filled thermometer pockets located on the cover plate. For the winding temperature indicator, the winding gradient is adjusted by means of Thermal Imaging. This can be part of the thermometer pocket, which is heated by a resistance fed by representative current (through current transformer) or can be done externally by an adjustable shunt resistor, which is part of the temperature indicator. The temperature indicators are provided with alarm and trip contacts. They can also be provided with contacts for changeover from natural cooling to forced cooling (control of fans) at pre-determined temperatures.