GB1420026A - Detection of phase interruption in a polyphase system - Google Patents

Detection of phase interruption in a polyphase system

Info

Publication number
GB1420026A
GB1420026A GB1875673A GB1875673A GB1420026A GB 1420026 A GB1420026 A GB 1420026A GB 1875673 A GB1875673 A GB 1875673A GB 1875673 A GB1875673 A GB 1875673A GB 1420026 A GB1420026 A GB 1420026A
Authority
GB
United Kingdom
Prior art keywords
switching circuit
pulses
period
phase
polyphase system
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1875673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HAZEMEYER
Original Assignee
HAZEMEYER
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 HAZEMEYER filed Critical HAZEMEYER
Publication of GB1420026A publication Critical patent/GB1420026A/en
Expired legal-status Critical Current

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
    • H02H3/12—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 underload or no-load
    • H02H3/13—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 underload or no-load for multiphase applications, e.g. phase interruption

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Measuring Phase Differences (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

1420026 Protective arrangements HAZEMEYER 18 April 1973 [28 April 1972] 18756/73 Heading H2K An arrangement for detecting phase failure in a polyphase system comprises sensors C 1 -C 3 associated with the respective phase conductors P 1 -P 3 and each producing a pulse at each half cycle of the respective phase current, and a monostable switching circuit (not shown) to which the pulses are applied, the switching circuit having a monostable period which lies between one nth part and one (n-1)th part of the cycle period of the polyphase system, n being the number of phases of the said system, so that the switching circuit is normally retained in the switched-on condition by the train of pulses, but when pulses derived from one phase cease due to a phase failure the switching circuit switches off during the period when a pulse is missing. The sensors may be toroidal cores with secondary windings connected to differentiator circuits formed by capacitors C 4 -C 6 and resistors R 4 -R 6 which shape the pulses. Diodes D 4 -D 6 eliminate the positive pulses so that the output signal at E to the switching circuit is a train of short negative pulses. Rectifiers S 1 -S 3 , regulators Rg 1 -Rg 3 and diodes D 1 -D 3 provide a power supply to the switching circuit and for an alarm or protective circuit. This supply may also provide a signal to a logic circuit, Fig. 3 (not shown) which is effective to prevent incorrect operation of the arrangement under transient conditions.
GB1875673A 1972-04-28 1973-04-18 Detection of phase interruption in a polyphase system Expired GB1420026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7215284A FR2186766B1 (en) 1972-04-28 1972-04-28

Publications (1)

Publication Number Publication Date
GB1420026A true GB1420026A (en) 1976-01-07

Family

ID=9097736

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1875673A Expired GB1420026A (en) 1972-04-28 1973-04-18 Detection of phase interruption in a polyphase system

Country Status (8)

Country Link
BE (1) BE798801A (en)
DE (1) DE2317990C3 (en)
ES (1) ES414190A1 (en)
FR (1) FR2186766B1 (en)
GB (1) GB1420026A (en)
IT (1) IT981793B (en)
LU (1) LU67503A1 (en)
NL (1) NL7305588A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU574537B2 (en) * 1984-11-22 1988-07-07 Thorn Emi Electronics Ltd. Electrical continuity monitoring apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038389B1 (en) * 2015-06-30 2018-10-26 Safran Electrical & Power MONITORING CIRCUIT OF A THREE-PHASE ELECTRICAL NETWORK

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1542556A (en) * 1967-07-07 1968-10-18 Comp Generale Electricite Control device for a time switch
FR2036767A6 (en) * 1969-03-25 1970-12-31 Comp Generale Electricite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU574537B2 (en) * 1984-11-22 1988-07-07 Thorn Emi Electronics Ltd. Electrical continuity monitoring apparatus

Also Published As

Publication number Publication date
NL7305588A (en) 1973-10-30
BE798801A (en) 1973-08-16
DE2317990C3 (en) 1982-02-11
DE2317990B2 (en) 1981-06-11
ES414190A1 (en) 1976-03-01
FR2186766B1 (en) 1980-08-14
DE2317990A1 (en) 1973-11-08
LU67503A1 (en) 1973-07-06
FR2186766A1 (en) 1974-01-11
IT981793B (en) 1974-10-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee