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The Landis+Gyr FQD 2..7 ripple control transmitter …
https://www.landisgyr.eu/webfoo/wp-content/uploads/product-files/EMEA_LM_FQD_Transmitter_Brochure.pdf
Ripple control frequency 110–1600 Hz, programmable AF output voltage (phase-to-phase) 400 VAC 400 VAC 400 VAC 400 VAC 760 VAC 760 VAC other on request Transmission frequency stability Better than 0,01% Converter efficiency > 98% at nominal load Environment Temperature Without air conditioning, -5 to 40 degrees C Humidity class F
DE3813656A1 - Google Search
https://patents.google.com/patent/DE3813656A1/en
For electricity meters with an audio-frequency ripple control receiver which is integrated in the meter housing and which influences switching means for switching over the tariff devices, it is...
Audio-frequency injection transformers for ripple control ...
https://www.freepatentsonline.com/4156221.html
Coupling transformers for networks with a superimposed audio-frequency voltage for the audio-frequency ripple control are used under integration of the 50-Hz power distribution network for the purpose of triggering synchronous switching operations at any desired time and at any desired location by way of audio-frequency receivers.
EUROPEAN RADIO RIPPLE CONTROL
http://www.efr-funk.com/com/download/pdfs/funkrundsteuerung.pdf
Audio frequency ripple control – radio ripple control Properties Audio frequency Radio ripple control ripple control Several unit manufacturers + + Flexible tariff adjustment + + System availability + + Service life of receiver + + Installation - + Transmission speed - + Modulation range - + Influence on voltage quality - +
5,600 138,000 175M
https://www.intechopen.com/chapter/pdf-preview/49069
9. Mains signaling, audio-frequency centralized ripple-control 2.1. “Pro-prosumer” approach” — Feed and forget, unconditional connection The “pro-prosumer” approach is related to unconditional connection criteria used in the electromagnetic compatibility emission limit references. Generally, the idea is to connect small-
Blackouts - no thanks! Audio frequency ripple control ...
https://www.instrumentation.co.za/news.aspx?pklnewsid=29657
To keep this highly sensitive area under tight control, the 40 Wienstrom power substations are equipped with transmitters that make it possible to switch electrical loads using an audio frequency ripple control system. The audio frequency ripple control transmitters control many different types of devices and are responsible for more than 70 000 recipients overall.
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