CN201311837Y - Transformer for testing secondary arc current - Google Patents
Transformer for testing secondary arc current Download PDFInfo
- Publication number
- CN201311837Y CN201311837Y CNU2008201062448U CN200820106244U CN201311837Y CN 201311837 Y CN201311837 Y CN 201311837Y CN U2008201062448 U CNU2008201062448 U CN U2008201062448U CN 200820106244 U CN200820106244 U CN 200820106244U CN 201311837 Y CN201311837 Y CN 201311837Y
- Authority
- CN
- China
- Prior art keywords
- secondary coil
- current
- primary winding
- electric current
- heavy
- 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 - Fee Related
Links
Images
Abstract
The utility model relates to a transformer for testing secondary arc current, comprising a primary coil (1), a secondary coil (2), a core (3), a resistor R (4) and high-power diodes (5), wherein the primary coil (1) and the secondary coil (2) are arranged on the core (3), and the primary coil (1) is of one turn coil; one end of the secondary coil (2) is connected with the fixed resistor R (4), and the other end of the resistor R (4) is connected with the positive high-power diode (5) and the negative high-power diode (5) which are connected in parallel; and the other ends of the positive and negative high-power diodes (5) which are connected in parallel are connected with the other end of the secondary coil (2), and an output terminal S1 and an output terminal S2 are respectively led out of the two ends of the parallel high-power diodes (5). When the current of the primary coil is 2 to 40A, the current of the secondary coil is 20 to 400mA; when the current of the primary coil is 20 to 100A, the current of the secondary coil is 100 to 500mA, and the measurement accuracy class is 0.5 degree; and when the current of the primary coil is 10000A, the transformer is not damaged.
Description
Technical field
The utility model belongs to instrument transformer, is specifically related to a kind of mutual inductor for latent current test.
Background technology
Have secondary arc current in electric power system high pressure and the extra high voltage network, when single-phase instantaneity earth fault took place high-tension line, the single-pole reclosing device made fault two ends circuit breaker trip.Because fault exists electric capacity and inductance coupling high mutually and between 2 non-faults phases, even fault is isolated with system mutually, the electric arc at fault place still can not extinguish rapidly, and existing aftercurrent is called secondary arc current in place, the fault point arc light.The big arc extinction time of secondary arc current is just longer, influences the success rate of automatic reclosing, and therefore, high pressure, superhigh pressure and extra-high voltage grid transmission line must be surveyed and Theoretical Calculation the latent voltage supplied of transmission line.Because secondary arc current is to exist in a period of time very short after single-phase fault excision, single-phase earth fault current can reach thousands of amperes according to system short circuit capacity, and secondary arc current hour has only several amperes to tens amperes.Differing the big current transformation equipment that is used to measure like this does not have at present, and the general round-about way that adopts is tested in the engineering.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of mutual inductor for latent current test, solves the once big electric current 10000A of conventional current instrument transformer and does not damage, and little electric current 2～100A requires to have the requirement of 0.5 grade of certainty of measurement.
The technical solution of the utility model: a kind of mutual inductor for latent current test, it comprises primary winding 1, secondary coil 2, iron core 3, resistance R 4 and heavy-duty diode 5, it is characterized in that unshakable in one's determination 3 are provided with primary winding 1 and a secondary coil 2, primary winding 1 is a circle, fixed resistance R4 of secondary coil one termination, the other end of resistance R 4 is connected with positive and negative two heavy-duty diodes 5 of parallel connection, the other end of positive and negative two heavy-duty diode 5 another termination secondary coils 2 in parallel, an output S is respectively drawn at heavy-duty diode in parallel 5 two ends
1, S
2S
1, S
2Connect the tester that load is 1 Ω in use.
When the primary winding electric current was 2～40A, the secondary coil electric current was 20～400mA, and when the primary winding electric current was 20～100A, the secondary coil electric current was 100～500mA, and required that 0.5 grade certainty of measurement is arranged; When the primary winding electric current was 10000A, instrument transformer did not damage.Current transformer is saturated fast when making primary current greater than 100A, the contacted resistance R 4 of 1～2.5 Ω of secondary coil.For when secondary current is big, do not burn out the external tester of instrument transformer, output is oppositely and connect two heavy-duty diodes.
The utility model compared with prior art has following beneficial effect: when the primary winding electric current is 2～40A, the secondary coil electric current is 20～400mA, when the primary winding electric current was 20～100A, the secondary coil electric current was 100～500mA, and required that 0.5 grade certainty of measurement is arranged; When the primary winding electric current was 10000A, instrument transformer did not damage.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
Embodiment 1:
A kind of mutual inductor for latent current test, it comprises primary winding 1, secondary coil 2, iron core 3, resistance R 4 and heavy-duty diode 5, it is characterized in that unshakable in one's determination 3 are provided with primary winding 1 and a secondary coil 2, primary winding 1 is a circle, fixed resistance R4 of secondary coil one termination, the other end of resistance R 4 is connected with positive and negative two heavy-duty diodes 5 of parallel connection, the other end of positive and negative two heavy-duty diode 5 another termination secondary coils 2 in parallel, an output S is respectively drawn at heavy-duty diode in parallel 5 two ends
1, S
2S
1, S
2Connect the tester that load is 1 Ω in use.
Concrete parameter is as follows: unshakable in one's determination 3 is Φ 160/200 * 30mm permalloy, and primary winding 1 one circles, secondary coil 2 are Φ 2.0 copper conductor 100t, and resistance R 4 is 1 Ω, D
1, D
2Be heavy-duty diode 5, allow electric current 20A, conducting voltage 0.7V, when primary winding 1 electric current is 70A when being secondary coil 2 electric current 700mA, heavy-duty diode 5 D
1, D
2Conducting, S
1, S
2Have only minimum electric current to pass through, play protection of instrumentation.
Embodiment 2
A kind of mutual inductor for latent current test, it comprises primary winding 1, secondary coil 2, iron core 3, resistance R 4 and heavy-duty diode 5, it is characterized in that unshakable in one's determination 3 are provided with primary winding 1 and a secondary coil 2, primary winding 1 is a circle, fixed resistance R4 of secondary coil one termination, the other end of resistance R 4 is connected with positive and negative two heavy-duty diodes 5 of parallel connection, the other end of positive and negative two heavy-duty diode 5 another termination secondary coils 2 in parallel, an output S is respectively drawn at heavy-duty diode in parallel 5 two ends
1, S
2S
1, S
2Connect the tester that load is 1 Ω in use.
Concrete parameter is as follows: unshakable in one's determination 3 is Φ 160/190 * 20mm permalloy, and primary winding 1 one circles, secondary coil 2 are Φ 2.0 copper conductor 200t, and resistance R 4 is 1 Ω, D
1, D
2Be heavy-duty diode 5, allow electric current 20A, conducting voltage 0.7V, when primary winding 1 electric current is 140A, promptly during secondary coil 2 electric current 700mA, heavy-duty diode 5 D
1, D
2Conducting, S
1, S
2Have only minimum electric current to pass through, play protection of instrumentation; When primary winding 1 electric current is 3000A, promptly during secondary coil 2 electric current 15A, even primary winding 1 electric current increases again, secondary coil 2 electric currents also no longer increase; When primary winding 1 electric current is that 1500A is secondary coil 2 electric currents when being 15A, unshakable in one's determination saturated.
Claims (3)
1, a kind of mutual inductor for latent current test, it comprises primary winding (1), secondary coil (2), (3) unshakable in one's determination, resistance R (4) and heavy-duty diode (5), it is characterized in that iron core (3) is provided with a primary winding (1) and a secondary coil (2), primary winding (1) is a circle, a secondary coil fixed resistance R of one termination (4), the other end of resistance R (4) is connected with positive and negative two heavy-duty diodes (5) of parallel connection, the other end of another termination secondary coil (2) of positive and negative two heavy-duty diodes (5) in parallel, an output S is respectively drawn at heavy-duty diode in parallel (5) two ends
1, S
2
2, mutual inductor for latent current test according to claim 1, when it is characterized in that the primary winding electric current is 2～40A, the secondary coil electric current is 20～400mA, when the primary winding electric current is 20～100A, the secondary coil electric current is 100～500mA, and reaches 0.5 grade certainty of measurement.
3, mutual inductor for latent current test according to claim 1 is characterized in that resistance R (4) is the resistance of 1～2.5 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201062448U CN201311837Y (en) | 2008-10-22 | 2008-10-22 | Transformer for testing secondary arc current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201062448U CN201311837Y (en) | 2008-10-22 | 2008-10-22 | Transformer for testing secondary arc current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201311837Y true CN201311837Y (en) | 2009-09-16 |
Family
ID=41109094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201062448U Expired - Fee Related CN201311837Y (en) | 2008-10-22 | 2008-10-22 | Transformer for testing secondary arc current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201311837Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120598A (en) * | 2014-08-07 | 2014-10-29 | 广东新宝电器股份有限公司 | Steam electric iron |
-
2008
- 2008-10-22 CN CNU2008201062448U patent/CN201311837Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120598A (en) * | 2014-08-07 | 2014-10-29 | 广东新宝电器股份有限公司 | Steam electric iron |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2416167A1 (en) | Improved turn-to-turn short circuit detection device of transformer via differential voltage | |
| CN103235280B (en) | Direct measuring method of magnetic saturation margin of current transformer based on scaling converter | |
| CN106970322A (en) | Hybrid high voltage DC breaker Fast mechanical switch dynamic voltage balancing test system | |
| CN101404404B (en) | Demarcation breaker for vector-synthesis zero sequence current | |
| CN201251622Y (en) | Heavy current up-flow aggregate unit for field test of 750v current transformator | |
| CN201311837Y (en) | Transformer for testing secondary arc current | |
| CN106501674A (en) | Medium voltage distribution network single-phase earth fault positioning device and its Fault Locating Method | |
| CN206132941U (en) | Experimental collection system of high voltage circuit breaker composite characteristic | |
| CN101488393B (en) | Mutual inductor for latent current test | |
| CN106653336B (en) | A method of preparing the current transformer with simplification error test function | |
| CN103730879A (en) | Protection device for power utilization system of transformer substation | |
| CN203660505U (en) | Electric system protection device for transformer substation | |
| Borland | Optimising MV neutral treatment, earth fault detection, localisation and response | |
| CN202033455U (en) | Direct testing loop used for direct current switch test | |
| Nelson et al. | Saturated-core fault current limiter field experience at a distribution substation | |
| Kusuma et al. | Auto-reclose Performance Evaluation on 500kV Transmission Line with Four Circuits on One Tower | |
| Li et al. | Calculation and Analysis of Short-circuit Performance of a Split-Winding Transformer with Stabilizing Windings | |
| CN203733723U (en) | Electromagnetic anti-thunder leakage circuit breaker | |
| Zeqo et al. | Impact of replacement of conventional recloser with PulseCloser | |
| CN204719114U (en) | A kind of 10kV line voltage distribution mutual inductor | |
| CN111654008B (en) | Temporary zero-sequence overcurrent protection engineering setting method and system for transformer | |
| CN201674117U (en) | 10KV signal loop of transformer substation | |
| CN202749797U (en) | Column breaker with zero sequence current indication function | |
| CN219643589U (en) | Permanent and instantaneous fault compound breaker for high-voltage line | |
| CN219247471U (en) | Join in marriage quick protection switch of network overhead line disconnection trouble |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20111022 |