Audio frequency suppressors
Audio frequency suppressors
Audio frequency suppressors, like all EPRO components for remote control systems, have been a fixed part of the EPRO product portfolio for decades.
Due to their robustness and extremely long service life of up to 30 years or more, they are highly valued by major system integrators of remote control systems.
Frequency control transmissions, such as those used for tariff switching in ripple control systems, can be disturbed by various sources of interferences, such as compensation systems at the consumer, electronic frequency converters (e.g. at alternative power plants) or with cable networks with high capacities.
Interference frequencies attenuate the transmission level in the smart grid and cause failures and incorrect switching in the ripple control.
Audio frequency suppressors prevent the unwanted spread of interference frequencies in ripple control systems from the entire medium-voltage grid where the source of interference is located.
An audio frequency suppressor creates a galvanic isolation between the medium-voltage network and the blocking circuit. The filter circuit consists of a medium-voltage transformer for each phase, with a shunt implemented on the secondary side and the capacitor unit. The impedance of this filter circuit is determined by customer according to network requirements.
Audio frequency suppressors can be used to lower the feed level for audio frequency transmissions in the smart grid, but also to protect customer networks in which frequency-sensitive devices or systems are operated from ripple control impulses.
Please find more informations in the datasheets in Downloads.
Production of audio frequency suppressor type FRS.
Circuit diagram for audio frequency suppressors, Type FRS with capacitor cabinet.