FREQUENCY RELAY Russian patent published in 2005 - IPC

Abstract RU 2244978 C1

FIELD: electrical engineering; frequency relays.

SUBSTANCE: proposed relay that functions to increase and decrease frequency and well as to vary frequency variation rate has isolating transformer, frequency-dependent component, two rectifiers, algebraic adder, three threshold units, two AND gates, two final components, subtraction unit, adder, and two low-pass filters; reduction in signal amplitude across output of frequency-dependent component relative to its input signal toward its reduction is proportional to modulus of its input signal frequency deviation from rated value.

EFFECT: enlarged functional capabilities of relay.

1 cl, 1 dwg

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RU 2 244 978 C1

Authors

Varganov G.P.

Rozenbljum R.Z.

Dates

2005-01-20—Published

2003-05-28—Filed