SE396480B - Frekvensrele - Google Patents

Frekvensrele

Info

Publication number
SE396480B
SE396480B SE7404628A SE7404628A SE396480B SE 396480 B SE396480 B SE 396480B SE 7404628 A SE7404628 A SE 7404628A SE 7404628 A SE7404628 A SE 7404628A SE 396480 B SE396480 B SE 396480B
Authority
SE
Sweden
Prior art keywords
frequency rules
rules
frequency
Prior art date
Application number
SE7404628A
Other languages
English (en)
Swedish (sv)
Inventor
H Leibold
E Born
Original Assignee
Siemens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of SE396480B publication Critical patent/SE396480B/xx

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/46—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to frequency deviations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
    • G01R29/027—Indicating that a pulse characteristic is either above or below a predetermined value or within or beyond a predetermined range of values
    • G01R29/0273—Indicating that a pulse characteristic is either above or below a predetermined value or within or beyond a predetermined range of values the pulse characteristic being duration, i.e. width (indicating that frequency of pulses is above or below a certain limit)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
SE7404628A 1973-04-11 1974-04-05 Frekvensrele SE396480B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732318876 DE2318876C3 (de) 1973-04-11 1973-04-11 Frequenzrelais

Publications (1)

Publication Number Publication Date
SE396480B true SE396480B (sv) 1977-09-19

Family

ID=5878073

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7404628A SE396480B (sv) 1973-04-11 1974-04-05 Frekvensrele

Country Status (5)

Country Link
CH (1) CH569980A5 (it)
DE (1) DE2318876C3 (it)
IT (1) IT1009769B (it)
NL (1) NL7404255A (it)
SE (1) SE396480B (it)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1094302A (en) * 1964-03-12 1967-12-06 Plessey Uk Ltd Improvements in or relating to frequency sensing systems
DE1466657A1 (de) * 1964-04-08 1972-02-17 Westinghouse Canada Ltd Schaltungsanordnung zur Ermittlung von Frequenzabweichungen
GB1082975A (en) * 1964-05-07 1967-09-13 Plessey Uk Ltd Apparatus for frequency and phase comparison of two periodic signals
GB1279611A (en) * 1968-07-01 1972-06-28 George William Gurry Improvements in circuit arrangements

Also Published As

Publication number Publication date
DE2318876A1 (de) 1974-10-24
DE2318876B2 (de) 1976-07-15
DE2318876C3 (de) 1983-04-28
NL7404255A (it) 1974-10-15
CH569980A5 (it) 1975-11-28
IT1009769B (it) 1976-12-20

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