GB1512539A - Electrical measuring instrument - Google Patents
Electrical measuring instrumentInfo
- Publication number
- GB1512539A GB1512539A GB4999075A GB4999075A GB1512539A GB 1512539 A GB1512539 A GB 1512539A GB 4999075 A GB4999075 A GB 4999075A GB 4999075 A GB4999075 A GB 4999075A GB 1512539 A GB1512539 A GB 1512539A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cos
- sin
- proportional
- output
- power
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/006—Measuring power factor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/001—Measuring real or reactive component; Measuring apparent energy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R7/00—Instruments capable of converting two or more currents or voltages into a single mechanical displacement
- G01R7/12—Instruments capable of converting two or more currents or voltages into a single mechanical displacement for forming product
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
1512539 Measuring power S W ECKETT 1 Dec 1976 [5 Dec 1975] 49990/75 Heading G1U Power to a load 2, Fig. 1, is monitored by scaling 10 the voltage V by selectable 11 factors of sin# and cos#, by applying the scaled voltages Vsin# and Vcos# to a var meter 8 and a watt meter 6 respectively together with the load current I, and by arranging that the outputs of the var and watt meters are summed to provide a quantity proportional to VI(sin#sin# + cos#cos#) = VIcos(#-#), where # is the phase angle of the load current. Thus, by setting # equal to zero and ninety degrees in turn, the sum output will be proportional to watts and vars, and by setting # to maximize the output, the output will be proportional to apparent power VI.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4999075A GB1512539A (en) | 1976-12-01 | 1976-12-01 | Electrical measuring instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4999075A GB1512539A (en) | 1976-12-01 | 1976-12-01 | Electrical measuring instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1512539A true GB1512539A (en) | 1978-06-01 |
Family
ID=10454246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4999075A Expired GB1512539A (en) | 1976-12-01 | 1976-12-01 | Electrical measuring instrument |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1512539A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103983842A (en) * | 2014-05-15 | 2014-08-13 | 国家电网公司 | Substation power measurement error compensation method |
-
1976
- 1976-12-01 GB GB4999075A patent/GB1512539A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103983842A (en) * | 2014-05-15 | 2014-08-13 | 国家电网公司 | Substation power measurement error compensation method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |