FR648122A - Differential protective device for machines and electrical devices - Google Patents

Differential protective device for machines and electrical devices

Info

Publication number
FR648122A
FR648122A FR648122DA FR648122A FR 648122 A FR648122 A FR 648122A FR 648122D A FR648122D A FR 648122DA FR 648122 A FR648122 A FR 648122A
Authority
FR
France
Prior art keywords
machines
protective device
electrical devices
differential protective
differential
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR648122A publication Critical patent/FR648122A/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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/28—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
FR648122D 1927-04-12 1928-02-03 Differential protective device for machines and electrical devices Expired FR648122A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE648122X 1927-04-12
SE288562X 1927-04-12

Publications (1)

Publication Number Publication Date
FR648122A true FR648122A (en) 1928-12-05

Family

ID=69147335

Family Applications (1)

Application Number Title Priority Date Filing Date
FR648122D Expired FR648122A (en) 1927-04-12 1928-02-03 Differential protective device for machines and electrical devices

Country Status (2)

Country Link
FR (1) FR648122A (en)
GB (1) GB288562A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10654122B2 (en) 2016-02-05 2020-05-19 Michael Hacikyan Gas diffusing water degradable welding purge dam

Also Published As

Publication number Publication date
GB288562A (en) 1928-09-27

Similar Documents

Publication Publication Date Title
FR648122A (en) Differential protective device for machines and electrical devices
FR660930A (en) Loading device for norias and other lifting devices
FR32982E (en) Differential protection device for electrical machines and transformers
FR714845A (en) Safety device for machines and electrical devices
FR660247A (en) Device for checking fault indicating devices in electrical machines
FR642948A (en) Compensating device for adjusting radio-electric devices
FR717470A (en) Protection device for telephone devices
FR649620A (en) Safety device for aviation devices
FR681240A (en) Safety device for nuts and screws
FR593765A (en) Protective device for lifts and similar devices
FR31118E (en) Protective device for lifts and similar devices
FR648459A (en) Advertising device
FR572883A (en) Hygienic protective device for telephone devices
FR670089A (en) Receiving device for lifting devices
FR655678A (en) Device for teaching and conducting music
FR635995A (en) Protection device for electrical installations
FR652552A (en) Device for induction meters
FR665433A (en) Protective device for three-phase generator
FR653217A (en) Protective devices for electrical devices
FR658528A (en) Supports for electrical devices
FR620966A (en) Safety device for cinematographic devices
FR660931A (en) Unloading device for norias and other lifting devices
FR704727A (en) Safety device for cinematographic devices
GB285014A (en) Computing device
FR661024A (en) Declutching device for spinners and twists