GB799369A - Phase sequence filter - Google Patents
Phase sequence filterInfo
- Publication number
- GB799369A GB799369A GB14880/56A GB1488056A GB799369A GB 799369 A GB799369 A GB 799369A GB 14880/56 A GB14880/56 A GB 14880/56A GB 1488056 A GB1488056 A GB 1488056A GB 799369 A GB799369 A GB 799369A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- resistor
- phase sequence
- phase
- feeds
- 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
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ac-Ac Conversion (AREA)
Abstract
799,369. Protective cut-out systems. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. May 14, 1956 [May 28, 1955], No. 14880/56. Class 38 (5). A phase-sequence filter for a three-phase system has two current transformers 1, 2 feeding two impedance circuits. Transformer 1 feeds a resistor 6 and the primary 7 of a transformer 3 whilst transformer 2 feeds a resistor 4 and reactor 5 in parallel and also a small additional primary 9 of the transformer 3. The output is taken from the terminals 10 across the circuit comprising resistor 6, transformer secondary 8 and the parallel resistor 4 and reactor 5. The Specification shows with the aid of vector diagrams (Figs. 2 and 3, not shown) that the output is a measure of the negative phase sequence component and that no positive phase sequence component appears even when the system frequency changes. The winding 9 may be omitted and instead the values of resistors 4, 6 and the air gap in the transformer 3 adjusted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE799369X | 1955-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB799369A true GB799369A (en) | 1958-08-06 |
Family
ID=20339843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14880/56A Expired GB799369A (en) | 1955-05-28 | 1956-05-14 | Phase sequence filter |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB799369A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2156828A1 (en) * | 1999-08-04 | 2001-07-16 | Univ Valencia Politecnica | Complete sequence filter for improving the efficiency of electrical installations |
-
1956
- 1956-05-14 GB GB14880/56A patent/GB799369A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2156828A1 (en) * | 1999-08-04 | 2001-07-16 | Univ Valencia Politecnica | Complete sequence filter for improving the efficiency of electrical installations |
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