GB1299933A - Static protection impedance relay - Google Patents

Static protection impedance relay

Info

Publication number
GB1299933A
GB1299933A GB22048/70A GB2204870A GB1299933A GB 1299933 A GB1299933 A GB 1299933A GB 22048/70 A GB22048/70 A GB 22048/70A GB 2204870 A GB2204870 A GB 2204870A GB 1299933 A GB1299933 A GB 1299933A
Authority
GB
United Kingdom
Prior art keywords
voltage
resistor
transformer
circuit
direct voltage
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
GB22048/70A
Inventor
Anders Helge
Torkel Johansson
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1299933A publication Critical patent/GB1299933A/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
    • H02H3/40—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 ratio of voltage and current

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

1299933 Protective arrangements ALLMANNA SVENSKA ELEKTRISKA AB 7 May 1970 [8 May 1969] 22048/70 Heading H2K A static impedance relay arrangement comprises a "current" circuit 1, 10 for producing, e.g. across a resistor 11, a first pulsating direct voltage proportional to the current of a protected circuit, a "voltage" circuit for-producing, e.g. across a resistor 14, a voltage which is the sum of a smoothed direct voltage and a second voltage which may be either a second pulsating direct voltage or an alternating voltage, both smoothed and second voltage being proportional to the voltage of the protected circuit, and a detector 15 responsive to a difference between the first voltage and the summed voltage to cause the operation of a relay 17. The smoothed direct voltage is produced from the secondary winding 22 of a transformer 20 having its primary winding 21 connected to a voltage transformer (not shown), the end terminals 26, 27 of the secondary winding being connected to a phase shifter comprising a resistor 50 and a capacitor 51, which together with a centre tapping 28 are connected to a bridge rectifier 35 with a smoothing capacitor 39. The second voltage is provided from a secondary winding 23 and a rectifier 43 with an unsmoothed output or directly from the winding 23, Fig. 3 (not shown). The first pulsating direct voltage is obtained from a transformer 1 having its primary winding connected to current transformers (not shown) and a full wave rectifier 10 or a half wave rectifier, Fig. 3 (not shown). Various characteristics are illustrated in impedance diagrams.
GB22048/70A 1969-05-08 1970-05-07 Static protection impedance relay Expired GB1299933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE06507/69A SE330930B (en) 1969-05-08 1969-05-08

Publications (1)

Publication Number Publication Date
GB1299933A true GB1299933A (en) 1972-12-13

Family

ID=20268860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22048/70A Expired GB1299933A (en) 1969-05-08 1970-05-07 Static protection impedance relay

Country Status (7)

Country Link
US (1) US3629658A (en)
CH (1) CH530102A (en)
FR (1) FR2042480B1 (en)
GB (1) GB1299933A (en)
NO (1) NO125608B (en)
SE (1) SE330930B (en)
YU (1) YU32440B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH565469A5 (en) * 1973-06-07 1975-08-15 Bbc Brown Boveri & Cie
SE441138B (en) * 1984-02-01 1985-09-09 Asea Ab DIGITAL IMPEDANCE RELEASE
SE452534B (en) * 1986-04-08 1987-11-30 Asea Ab PROCEDURE AND DEVICE FOR RESTRICTIONS AND DIRECT DISPLACEMENT IN CONNECTION WITH PROTECTION OF A POWER PIPE

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE685594C (en) * 1933-07-08 1939-12-27 Aeg Protection relay for electrical AC systems with time-dependent triggering
US2495166A (en) * 1945-12-29 1950-01-17 Westinghouse Electric Corp Distance-type relay with limited directional discrimination
FR1051922A (en) * 1951-03-28 1954-01-20 Low impedance relay for remote protection
US2981867A (en) * 1957-10-25 1961-04-25 Gen Electric Electric relay
FR1347586A (en) * 1963-02-19 1963-12-27 Bbc Brown Boveri & Cie Protection device with rectifier bridge assembly
GB1192640A (en) * 1967-09-22 1970-05-20 English Electric Co Ltd Improvements in Distance Relays

Also Published As

Publication number Publication date
YU32440B (en) 1974-10-31
SE330930B (en) 1970-12-07
DE2022150A1 (en) 1970-11-19
FR2042480B1 (en) 1974-07-12
DE2022150B2 (en) 1973-04-12
NO125608B (en) 1972-10-02
US3629658A (en) 1971-12-21
YU115170A (en) 1974-04-30
CH530102A (en) 1972-10-31
FR2042480A1 (en) 1971-02-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee