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What is the Function of RC circuit in Tesys D contactor ?

It is used for effective protection for circuits highly sensitive to "high frequency" interference. It is to be used only in cases where the voltage is virtually sinusoidal. i.e. less than 5 % total harmonic distortion.
Voltage limited to 3 Uc max. and oscillating frequency limited to 400 Hz max. Slight increase in drop-out time (1.2 to 2 times the normal time).
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