Brochure

2 | RCD Type F
Type F: a new RCD type to ensure complete safety
ABB introduces the Type F Residual Current Devices, dedicated to the
protection of lines supplying single phase inverters.
Nowadays electric appliances including single phase inverters
are widely used in household and commercial/industrial
applications to reach higher level of efficiency reducing the
energy consumption of the electric motors. Single phase
inverters regulate the speed of motors by supplying a variable
frequency, from 10 to 1000 Hz.
Classical types of RCDs, intended to protect people and
equipment at rated frequency of 50/60Hz, are not specifically
tested in presence of residual currents with a relevant
contribution from high frequencies AC components. The new
Type F RCD (where “F” stands for Frequency), introduced in
the Product Standard IEC/EN 62423, requires specific high
frequency tests to be accomplished.
ABB new Type F RCDs clearly respond now to the customers
need of a reliable and accurate protection of lines supplying
single phase inverters with a proven solution.