Application
Separating filters must be integrated:
- into the circuit of each channel where devices on dedicated HF protection channels or dedicated relay protection and emergency control automatics channels are connected in parallel;
- into the communication equipment circuit where devices on dedicated HF protection channels or dedicated relay protection and emergency control automatics channels are connected in parallel.
For application in HF channels with bypass of substations, where several channels are connected to one phase in parallel, we recommend to integrate a decoupling filter in the HF bypass. Such filter will pass signals at transit channel frequencies and block signals at the frequencies of the channels that terminate at the bypass.
Technical specifications
Rated values of the key technical parameters shown here apply under nominal climatic conditions as per GOST 1515069:
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Temperature
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+1o to +45o C, indoor
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Relative humidity
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45 to 80 %
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Atmospheric pressure
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84 to 107 kPa (630 to 800 mm Hg)
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Maximum weight
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Not more than 3,5 kg
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Dimensions, mm
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100 x 100 x 328
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The separating filter is rated for 250 VA high frequency current within the passband.
Attenuation produced by the separating filter when connected in parallel to the HF circuit under the load of 75 Ohm is 0.8 dB within the frequency band of ± 2 kHz in reference to the filter adjustment frequency.
Attenuation produced by the separatimg filter when connected in series to the HF circuit under the load of 75 Ohm is 0.8 dB at the frequencies at least 10% higher or lower than the filter adjustment frequency.
We can supply RF filters with other stop band and pass band parameters at the customer’s individual request.
Output circuit insulation resistance in reference to the enclosure – 100 Mohm Electric strength of insulating strength between the enclosure and the terminal is such as to withstand 1500 V AC (effective value)
with the frequency of (50 ± 3) Hz within 1 minute.
