The invention relates to a disruption suppressor in a measuring interface consisting of two protection stages for the three phases and for the neutral. The configuration of the suppressor for each of the three phases and the neutral comprises a high ohm resistor (3), a varistor (5), a second cutoff power resistor (4) and a voltage reducer (6), said suppressor having a ground connection (7) and terminals (1) for 220 V supply input and a terminal (2) for the connection to the device.
1. A perturbations suppressor for measurement interfaces, characterised in that it comprises two protection stages, both for the three phases and for the neutral, configured with two terminals (1) and (2) for connection to the 220V input and connection to the measurement device respectively, incorporating four resistors (3) with a high ohm value and a high power, four varistors (5), four resistors (4) with uncoupling power and four Zener type voltage limiters (6), used as transient absorbers, as well as having an earth connection (7). 2. A perturbations suppressor for measurement interfaces, according to claim 1, characterised in that it is comprised of two protection stages, both for the three phases and for the neutral.