JPS5627200B2 - - Google Patents
Info
- Publication number
- JPS5627200B2 JPS5627200B2 JP765175A JP765175A JPS5627200B2 JP S5627200 B2 JPS5627200 B2 JP S5627200B2 JP 765175 A JP765175 A JP 765175A JP 765175 A JP765175 A JP 765175A JP S5627200 B2 JPS5627200 B2 JP S5627200B2
- Authority
- JP
- Japan
- 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
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- 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
- H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
- H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0805—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for synchronous motors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Multiple Motors (AREA)
- Protection Of Generators And Motors (AREA)
- Control Of Ac Motors In General (AREA)
- Centrifugal Separators (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742402423 DE2402423C3 (en) | 1974-01-18 | Method for monitoring a drive system with a number of induction machines and monitoring circuit for carrying out the method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS50107415A JPS50107415A (en) | 1975-08-23 |
JPS5627200B2 true JPS5627200B2 (en) | 1981-06-23 |
Family
ID=5905131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP765175A Expired JPS5627200B2 (en) | 1974-01-18 | 1975-01-17 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS5627200B2 (en) |
GB (1) | GB1494202A (en) |
NL (1) | NL7405749A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2128425B (en) * | 1982-10-08 | 1986-06-25 | Newelec Pretoria | Stall detection apparatus |
EP0276400A3 (en) * | 1983-07-11 | 1989-04-19 | Square D Company | Mechanically operated pressure switch having solid state components |
DE3412541A1 (en) * | 1984-04-04 | 1985-10-31 | Jungheinrich Unternehmensverwaltung Kg, 2000 Hamburg | BATTERY CHARGER |
AU569646B2 (en) * | 1984-12-18 | 1988-02-11 | Toshiba, Kabushiki Kaisha | Detecting critical rotation speed of an induction motor |
DE4430557C2 (en) * | 1994-08-30 | 1998-03-19 | Seifert Electronic R | Method for determining the speed behavior of a fan and arrangement for carrying out this method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4519942Y1 (en) * | 1965-06-04 | 1970-08-12 |
-
1974
- 1974-04-25 GB GB1823974A patent/GB1494202A/en not_active Expired
- 1974-04-29 NL NL7405749A patent/NL7405749A/en not_active Application Discontinuation
-
1975
- 1975-01-17 JP JP765175A patent/JPS5627200B2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4519942Y1 (en) * | 1965-06-04 | 1970-08-12 |
Also Published As
Publication number | Publication date |
---|---|
JPS50107415A (en) | 1975-08-23 |
GB1494202A (en) | 1977-12-07 |
DE2402423B2 (en) | 1977-02-03 |
NL7405749A (en) | 1976-03-31 |
DE2402423A1 (en) | 1976-04-15 |