Interference suppression filters and mains filters limit pulse-like, high-frequency interference voltages caused by mechanical or electronically triggered switching operations. If interference voltages are not limited, they spread via the cable network and electrically conductive connections. This can result in data errors, uncontrolled functions, and system crashes. Mains filters ensure an EMC-compliant power supply by limiting interference voltages.
More informationDevice protection, according to type 3/class III, with network interference suppression filter to prevent high-frequency interference voltages, for 1-phase power supply networks with separate N and PE (3-conductor system: L1, N, PE), with remote indication contact.
Mains interference filter, with universal foot for mounting on NS 32 and NS 35/7.5, nominal current: 10 A
Mains interference filter, with universal foot for mounting on NS 32 and NS 35/7.5, nominal current: 6 A
Device protection, according to type 3/class III, with network interference suppression filter to prevent high-frequency interference voltages, for 1-phase power supply networks with separate N and PE (3-conductor system: L1, N, PE), with remote indication contact.
Device protection, according to type 3/class III, with network interference suppression filter to prevent high-frequency interference voltages, for 1-phase power supply networks with separate N and PE (3-conductor system: L1, N, PE), with remote indication contact.
Device protection, according to type 3/class III, with network interference suppression filter to prevent high-frequency interference voltages, for 1-phase power supply networks with separate N and PE (3-conductor system: L1, N, PE), with remote indication contact.
TERMITRAB, spring-cage modular terminal block with integrated surge protection as a filter circuit and disconnect knives, for assembly on NS 35/7.5, voltage UN 24 V DC, terminal width: 6.2 mm, cover width: 2.2 mm
Device protection, according to type 3/class III, with network interference suppression filter to prevent high-frequency interference voltages, for 1-phase power supply networks with separate N and PE (3-conductor system: L1, N, PE), with remote indication contact.
Terminal block with radio interference suppression capacitor between clamping connector and DIN rail, separate ground connection, nominal voltage: 3.3 nF, for mounting on NS 35/7.5, terminal width: 6.2 mm, terminal height: 69 mm
Mains interference filter, with universal foot for mounting on NS 32 and NS 35/7.5, nominal current: 1 A
Filterlösungen
Entstörfilter mit integriertem Überspannungsschutz übernehmen zwei Aufgaben: Sie absorbieren transiente Überspannungen und begrenzen zudem hochfrequente Störspannungen.
Verschiedene Bauformen stehen zur Verfügung:
Tragschienenmodul SFP
Reihenklemme TERMITRAB
Interference suppression filter (mains filter)
Interference suppression filters or mains filters with a dedicated filter circuit protect against both symmetrical and asymmetrical disturbance variables.
NEF DIN rail module
TERMITRAB terminal blocks with integrated interference suppression capacitor are suitable for applications where asymmetrical protection is sufficient.
Example mains filter circuit
Filtering of symmetrical disturbance variables X
Interference voltages between the phase and neutral conductor are filtered.
Filtering of asymmetrical disturbance variables Y1 Y2
The respective negative phase-sequence grounded interference voltages from the phase conductor to PE and from the neutral conductor to PE are filtered.
Typical characteristic curve for an interference suppression filter
An attenuation characteristic curve diagram illustrates the effective operating range of mains filters. The relevant frequency-dependent attenuation can be read according to the symmetrical or asymmetrical filter circuit.