FR2386043A1 - Electrical network loop impedance measurement - involves resistance and inductance circuits interconnected by switch - Google Patents
Electrical network loop impedance measurement - involves resistance and inductance circuits interconnected by switchInfo
- Publication number
- FR2386043A1 FR2386043A1 FR7709290A FR7709290A FR2386043A1 FR 2386043 A1 FR2386043 A1 FR 2386043A1 FR 7709290 A FR7709290 A FR 7709290A FR 7709290 A FR7709290 A FR 7709290A FR 2386043 A1 FR2386043 A1 FR 2386043A1
- Authority
- FR
- France
- Prior art keywords
- switch
- electrical network
- network
- impedance measurement
- resistance
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The method of measurement uses the fall in voltage method initiated by the connection of a known load Z into the network. The method includes a preliminary adaptation operation which consists of modifying the nature of the known load Z until the fall in voltage is a maximum. Modification of the load Z is achieved by modifying its argument phi whilst retaining its modulus ant. The variable known load Z (1) consists of a resistance network (2) which can be switched by a first stage (3) of a switch (4) in series with an inductance network (5). The inductance network (5) can be switched by a second stage (6) of the switch (4). Each resistance, inductance network switched simultaneously in series by the switch (4) has an impedance whose modulus nstant and whose argument phi is variable and depends upon the position of the switch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7709290A FR2386043A1 (en) | 1977-03-29 | 1977-03-29 | Electrical network loop impedance measurement - involves resistance and inductance circuits interconnected by switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7709290A FR2386043A1 (en) | 1977-03-29 | 1977-03-29 | Electrical network loop impedance measurement - involves resistance and inductance circuits interconnected by switch |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2386043A1 true FR2386043A1 (en) | 1978-10-27 |
FR2386043B1 FR2386043B1 (en) | 1981-08-28 |
Family
ID=9188688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7709290A Granted FR2386043A1 (en) | 1977-03-29 | 1977-03-29 | Electrical network loop impedance measurement - involves resistance and inductance circuits interconnected by switch |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2386043A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2702842A1 (en) * | 1993-03-18 | 1994-09-23 | Merlin Gerin | Permanent control system for the electrical conduction of an alternative network. |
-
1977
- 1977-03-29 FR FR7709290A patent/FR2386043A1/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2702842A1 (en) * | 1993-03-18 | 1994-09-23 | Merlin Gerin | Permanent control system for the electrical conduction of an alternative network. |
EP0617292A1 (en) * | 1993-03-18 | 1994-09-28 | Schneider Electric Sa | Continuously AC-mains resistance monitoring system |
US5420511A (en) * | 1993-03-18 | 1995-05-30 | Merlin Gerin | System for continuous monitoring of the electrical conduction of an AC power system |
Also Published As
Publication number | Publication date |
---|---|
FR2386043B1 (en) | 1981-08-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |