Dual voltage relay RNPP-311-1

Dual voltage relay RNPP-311-1 is a modification of a standard relay RNPP-311 .

Perform all voltage control function incorporated in RNPP-311 and additionally controls the network frequency. Designed for load shedding of 380 V / 50 Hz:

• unacceptable voltage fluctuations in the network with a duration of not less than 0.02 s, amplitude symmetry violation of the mains voltage (phase shift), breakage and phase sequence violation sticking phases (U Channel);
• Inappropriate increase / decrease the frequency of the network (channel f).

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