CN2368145Y - Switchover mechanism for on-load tap-changing switch without transition load - Google Patents
Switchover mechanism for on-load tap-changing switch without transition load Download PDFInfo
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- CN2368145Y CN2368145Y CN 99201573 CN99201573U CN2368145Y CN 2368145 Y CN2368145 Y CN 2368145Y CN 99201573 CN99201573 CN 99201573 CN 99201573 U CN99201573 U CN 99201573U CN 2368145 Y CN2368145 Y CN 2368145Y
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- load
- utility
- triggering
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Abstract
The utility model relates to a switchover mechanism for on-load tap-changing switch without transition load. Two ends of an electron tubes K1, K2 are respectively linked to the catelectrode and the anode of controlled silicon T1, T2, and the anodes of the T1 and the T2 are linked to one phase of an AC three phase power supply, the catelectrodes of the T1 and the T2 are linked to the tapping end of the first winding set B of a pressure reducing transformer. The output ends of zero passing point springing circuits 5 and 6 are connected with the trigger electrodes of the T1 and the T2. In the utility model, for an electron tube and a transition resistance are cancelled, the futile horsepower in the switching process is reduced greatly, because the utility model is switched when the alternating current passes zero point, therefore, circuit breaking phenomenon can not appear, and the utility model is of no harmonic waves for many times, and the utility model decreases the contamination of power supply.
Description
The utility model belongs to the switching mechanism of on-load tap changers of transformers.
The switching mechanism of existing on-load tap changers of transformers generally all is made up of three vacuum tubes and a transition resistance, wherein second vacuum tube is the continuity that guarantees handoff procedure voltage, be unlikely to the phenomenon setting of cutting off the power supply, transition resistance prevents that short circuit current is excessive and burns transformer and be provided with.But transition resistance is wanted consumed power, causes useless power consumption.
The purpose of this utility model is a kind of switching mechanism that does not have transition load on load tap changer of development, this switching mechanism has been cancelled second vacuum tube and transition resistance, make useless power consumption reduce greatly, the phenomenon that two groups of voltages are interrupted can not appear in handoff procedure yet, more multiple harmonic can not occur, reduce its pollution power supply.
The utility model is realized by following measure, each moment that all is selected in 50HZ alternating voltage zero-crossing point switching time carries out, so be connected two bidirectional triode thyristors with the transition resistance place at original second vacuum tube, each bidirectional triode thyristor is controlled its triggering and conducting respectively by zero crossing circuits for triggering, promptly it is by two vacuum tube K
1, K
2, two cams 1,2, camshaft 4, two bidirectional triode thyristor T
1, T
2, two zero crossing circuits for triggering 5,6, the elementary winding B of step-down transformer form vacuum tube K
1, K
2Two ends respectively with bidirectional triode thyristor T
1, T
2Negative electrode and anode two ends join T
1, T
2Anode connect a phase of three-phase alternating-current supply, T
1, T
2Negative electrode connect the tap terminals of the elementary winding B of step-down transformer, the output termination T of zero crossing circuits for triggering 5,6
1, T
2Trigger electrode.
The utility model is owing to cancelled a vacuum tube and transition resistance, make that consuming useless power reduces greatly, switch when the 50HZ alternating voltage zero-crossing point mainly due to having adopted, so can not occur the outage phenomenon in the handoff procedure yet, the pollution problem of multiple harmonic more can not occur to power supply.
Fig. 1 is the utility model overall structure schematic diagram.
Embodiment: present embodiment is by two vacuum tube K
1, K
2, two cams 1,2, camshaft 4, two bidirectional triode thyristor T
1, T
2, two zero crossing circuits for triggering 5,6, step-down transformer B form.Cam 1,2 is fixed on the camshaft 4, and camshaft 4 is subjected to drive mechanism.Cam 1,2 is corresponding vacuum tube K respectively
1, K
2Vacuum tube K
1Two ends and bidirectional triode thyristor T
1Negative electrode and anode two ends are connected in parallel respectively.Vacuum tube K
2Two ends and bidirectional triode thyristor T
2Negative electrode and anode two ends are connected in parallel respectively.T
1, T
2The anode A that connects the 50HZ three-phase alternating-current supply hold T mutually
1, T
2Negative electrode connect the elementary winding odd number of step-down transformer B tap terminals, even numbers tap terminals respectively, primary transformers B connects the D end at zero point of 50HZ three-phase alternating-current supply.Zero crossing circuits for triggering 5,6 are all by high-frequency isolation transformer T
a, diode D
1, capacitor C
1, resistance R
1, photoelectricity coupling circuits for triggering U
1Form.Photoelectricity coupling circuits for triggering U
1Serve as by the MOC3041 model, include a zero cross detection circuit 3 in this chip.T
3A secondary termination U
12 pin, D
1Positive pole meet T
3The secondary other end, D
1Negative pole meet U
11 pin, U
14 pin meet bidirectional triode thyristor T
1, T
2Trigger electrode, U
13,5 pin unsettled, high-frequency isolation transformer T
aThe elementary high-frequency ac power that connects.
Claims (2)
1, the switching mechanism of no transition load on load tap changer, it is by two vacuum tube K
1, K
2, two cams (1), (2), camshaft (4), two bidirectional triode thyristor T
1, T
2, two zero crossing circuits for triggering (5), (6), the elementary winding B of step-down transformer form, and it is characterized in that vacuum tube K
1, K
2Two ends respectively with bidirectional triode thyristor T
1, T
2Negative electrode and anode two ends join T
1, T
2Anode connect a phase of three-phase alternating-current supply, T
1, T
2Negative electrode connect the tap terminals of the elementary winding B of step-down transformer, the output termination T of zero crossing circuits for triggering (5), (6)
1, T
2Trigger electrode.
2, the switching mechanism of no transition load on load tap changer according to claim 1 is characterized in that zero crossing circuits for triggering (5), (6) are all by high-frequency isolation transformer T
3, diode D
1, capacitor C
1, resistance R
1, photoelectricity coupling circuits for triggering U
1Form photoelectricity coupling circuits for triggering U
1Contain a zero cross detection circuit, T
3A secondary termination U
12 pin, D
1Positive pole meet T
3The inferior 0 grade other end, D
1Negative pole meet U
11 pin, U
14 pin meet T
1, T
2Trigger electrode, U
13,5 pin unsettled, high-frequency isolation transformer T
3The elementary high-frequency ac power that connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99201573 CN2368145Y (en) | 1999-03-23 | 1999-03-23 | Switchover mechanism for on-load tap-changing switch without transition load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99201573 CN2368145Y (en) | 1999-03-23 | 1999-03-23 | Switchover mechanism for on-load tap-changing switch without transition load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2368145Y true CN2368145Y (en) | 2000-03-08 |
Family
ID=33997315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99201573 Expired - Fee Related CN2368145Y (en) | 1999-03-23 | 1999-03-23 | Switchover mechanism for on-load tap-changing switch without transition load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2368145Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009155B (en) * | 2006-01-27 | 2010-05-19 | 株式会社东芝 | Tap switching device when loading |
| CN101430966B (en) * | 2008-08-21 | 2011-02-16 | 上海华明电力设备制造有限公司 | Thyristor direct switching on-load tap-changer |
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
-
1999
- 1999-03-23 CN CN 99201573 patent/CN2368145Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009155B (en) * | 2006-01-27 | 2010-05-19 | 株式会社东芝 | Tap switching device when loading |
| CN101430966B (en) * | 2008-08-21 | 2011-02-16 | 上海华明电力设备制造有限公司 | Thyristor direct switching on-load tap-changer |
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |