The essential parameters needed to design a Grounding resistor are:
Nominal voltage
Fault current
Fault duration (10s is customary)
Other relevant parameters are:
Protection degree of enclosure: from IP00-i.e. no enclosure to IP55, standard solution IP23
Enclosure finish: our standard is mild galvanized, but different stainless steel grades are available; Painting in the desired RAL color is also an option
Continuous current rating: it may affect significantly the performance of the resistor, especially when high IP degrees are required.
Environment and elevation: we design resistors for the harshest industrial or natural settings
Auxiliary components: during our many years of operation we have selected a number of trusted suppliers for a wide choice of components, such as Current Transformers, Switches, Disconnectors, etc.
