GB1150865A - Improvements relating to Capacitive Voltage Transformers - Google Patents

Improvements relating to Capacitive Voltage Transformers

Info

Publication number
GB1150865A
GB1150865A GB183768A GB183768A GB1150865A GB 1150865 A GB1150865 A GB 1150865A GB 183768 A GB183768 A GB 183768A GB 183768 A GB183768 A GB 183768A GB 1150865 A GB1150865 A GB 1150865A
Authority
GB
United Kingdom
Prior art keywords
oscillations
capacitive voltage
voltage transformers
improvements relating
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
GB183768A
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.)
Micafil AG
Original Assignee
Micafil 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 Micafil AG filed Critical Micafil AG
Publication of GB1150865A publication Critical patent/GB1150865A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
    • H02H9/007—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions avoiding or damping oscillations, e.g. fenoresonance or travelling waves

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

1,150,865. Protective arrangements for capacitive voltage transformers. MICAFIL A.G. 12 Jan., 1968 [6 Feb., 1967], No. 1837/68. Heading H2H. Ferroresonant oscillations in a capacitive voltage transformer 1 are suppressed by the circuit arrangement shown, in which the occurrence of such oscillations triggers a bi-directional semi-conductor switch 4 to connect a damping burden 3 across the intermediate voltage transformer 2, the triggering being effected by a relaxation oscillator which supplies a train of firing pulses to ensure that the switch 4 conducts for the duration of the oscillations. The oscillator comprises capacitors 5, 7, resistors 6, 9 and a voltage-dependent (Shockley) diode 8, the capacitor 5 being connected to a control voltage source 10 for charging when unwanted oscillations occur.
GB183768A 1967-02-06 1968-01-12 Improvements relating to Capacitive Voltage Transformers Expired GB1150865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT111067 1967-02-06

Publications (1)

Publication Number Publication Date
GB1150865A true GB1150865A (en) 1969-05-07

Family

ID=3506793

Family Applications (1)

Application Number Title Priority Date Filing Date
GB183768A Expired GB1150865A (en) 1967-02-06 1968-01-12 Improvements relating to Capacitive Voltage Transformers

Country Status (6)

Country Link
BE (1) BE710262A (en)
CH (1) CH474175A (en)
ES (1) ES350010A1 (en)
FR (1) FR1566342A (en)
GB (1) GB1150865A (en)
NL (1) NL6801636A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005008859A1 (en) * 2003-07-17 2005-01-27 Abb Sp. Z O. O. A protection system for medium-voltage potential transformers
EP2128950A1 (en) 2008-05-29 2009-12-02 ABB Research Ltd. Protection system for voltage transformers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005008859A1 (en) * 2003-07-17 2005-01-27 Abb Sp. Z O. O. A protection system for medium-voltage potential transformers
EP2128950A1 (en) 2008-05-29 2009-12-02 ABB Research Ltd. Protection system for voltage transformers
WO2009143967A1 (en) * 2008-05-29 2009-12-03 Abb Research Ltd Protection system for voltage transformers
CN102047521B (en) * 2008-05-29 2014-03-26 Abb研究有限公司 Protection system for voltage transformers

Also Published As

Publication number Publication date
NL6801636A (en) 1968-08-07
ES350010A1 (en) 1970-04-16
BE710262A (en) 1968-06-17
CH474175A (en) 1969-06-15
FR1566342A (en) 1969-05-09

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees