FREQUENCY RELAY Russian patent published in 2004 - IPC

Abstract RU 2231850 C1

FIELD: electrical engineering.

SUBSTANCE: technical result of invention consists in expansion of functional capabilities of relay by provision for simultaneous implementation of functions of relay of frequency step up and down. Frequency relay has isolation transformer, frequency-dependent element, two rectifiers, algebraic adder, two threshold units, AND gate and actuating element. Fall of amplitude of signal across frequency-dependent element relative to amplitude of signal across its input is proportional to modulus of deviation of frequency of its input signal from nominal.

EFFECT: expanded functional capabilities of relay.

1 dwg

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RU 2 231 850 C1

Authors

Varganov G.P.

Rozenbljum R.Z.

Dates

2004-06-27—Published

2003-01-21—Filed