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GB1333538A - Dual voltage circuit arrangements - Google Patents

Dual voltage circuit arrangements

Info

Publication number
GB1333538A
GB1333538A GB1840572A GB1840572A GB1333538A GB 1333538 A GB1333538 A GB 1333538A GB 1840572 A GB1840572 A GB 1840572A GB 1840572 A GB1840572 A GB 1840572A GB 1333538 A GB1333538 A GB 1333538A
Authority
GB
United Kingdom
Prior art keywords
load
capacitor
component
terminals
high 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
GB1840572A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1333538A publication Critical patent/GB1333538A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
    • H02H11/007—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage involving automatic switching for adapting the protected apparatus to the supply voltage

Landscapes

  • Electronic Switches (AREA)
  • Rectifiers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

1333538 Supply systems for inductive loads INTERNATIONAL STANDARD ELECTRIC CORP 20 April 1972 [28 April 1971] 18405/72 Heading H2H In order to enable an inductive load 3, 4 to be supplied by either one of two alternating voltages applied to terminals 1, 2, a capacitor 5 is connected in series with the load, a semiconductor switching device 6 is connected in parallel with the capacitor and the gate of the device 6 is connected to a non-linear component 7. Thus if a high voltage is applied to terminals 1, 2, the current flowing through the component 7 is sufficient to gate the triac 6 on whereby the capacitor 5 is short circuited and the high voltage is applied to the load 3, 4. If the voltage applied to the terminals 1, 2 is low the current flowing in the component 7 is insufficient to cause gating of the triac 6 and under these conditions the inductive load 3, 4 resonates with the capacitor 5 such that the voltage applied to the load approximates to the high voltage value. The component 7 may be in the form of a voltage dependent resistor, two series opposed Zener diodes or a glow lamp.
GB1840572A 1971-04-28 1972-04-20 Dual voltage circuit arrangements Expired GB1333538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712120979 DE2120979B2 (en) 1971-04-28 1971-04-28 CIRCUIT ARRANGEMENT FOR AUTOMATIC MAINS VOLTAGE ADJUSTMENT

Publications (1)

Publication Number Publication Date
GB1333538A true GB1333538A (en) 1973-10-10

Family

ID=5806269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1840572A Expired GB1333538A (en) 1971-04-28 1972-04-20 Dual voltage circuit arrangements

Country Status (4)

Country Link
DE (1) DE2120979B2 (en)
FR (1) FR2134580B1 (en)
GB (1) GB1333538A (en)
IT (1) IT953671B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014085543A2 (en) * 2012-11-28 2014-06-05 Conair Corporation Modular travel power adapter and converter system
CN107834909A (en) * 2017-11-09 2018-03-23 国网上海市电力公司 A kind of full torque energy-saving soft start device of asynchronous machine controllable compensating type

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014085543A2 (en) * 2012-11-28 2014-06-05 Conair Corporation Modular travel power adapter and converter system
WO2014085543A3 (en) * 2012-11-28 2014-07-24 Conair Corporation Modular travel power adapter and converter system
US9235223B2 (en) 2012-11-28 2016-01-12 Conair Corporation Modular travel power adapter and converter system
CN107834909A (en) * 2017-11-09 2018-03-23 国网上海市电力公司 A kind of full torque energy-saving soft start device of asynchronous machine controllable compensating type
CN107834909B (en) * 2017-11-09 2020-03-31 国网上海市电力公司 Controllable compensation type full-torque energy-saving soft starting device of asynchronous motor

Also Published As

Publication number Publication date
DE2120979A1 (en) 1972-11-09
FR2134580A1 (en) 1972-12-08
FR2134580B1 (en) 1975-07-18
DE2120979B2 (en) 1976-08-12
IT953671B (en) 1973-08-10

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Legal Events

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