CN201985522U - DC bus rapid discharge circuit for anti-explosion current transformer - Google Patents
DC bus rapid discharge circuit for anti-explosion current transformer Download PDFInfo
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- CN201985522U CN201985522U CN2011200696575U CN201120069657U CN201985522U CN 201985522 U CN201985522 U CN 201985522U CN 2011200696575 U CN2011200696575 U CN 2011200696575U CN 201120069657 U CN201120069657 U CN 201120069657U CN 201985522 U CN201985522 U CN 201985522U
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Abstract
The utility model relates to a DC bus rapid discharge circuit for an anti-explosion current transformer. The circuit comprises a control power supply, a controllable switch device, a power discharge resistor, and an RCD (Residual Current Device) resistance-capacitance absorption loop, wherein the control power supply is connected to the control terminal of the controllable switch device; the power discharge resistor is connected in series with the contact switch of the controllable switch device, and then connected in parallel with the positive terminal and the negative terminal of a DC bus pole-plate requiring discharge and supported by large capacitance; and the RCD resistance-capacitance absorption loop is connected in parallel to the two ends of the contact switch of the controllable switch device. After power-off of a system, rapid discharge of a DC bus capacitor can be realized through controlling the charge and discharge of the control terminal of the controllable switch device, as well as the on/off of the contact switch of the controllable switch device. The utility model has the advantages that the energy stored in the DC bus capacitor can be rapidly reduced to lower than 0.2mJ in 15mins; the system has high work stability, reliability and safety; the system maintenance and repair efficiency is improved; and equipment volume is reduced and the system cost is lowered.
Description
Technical field
Direct current needed discharge technology field, explosion-proof current transformer dc bus quick discharging circuit after the utility model related to device powers down.
Background technology
After traditional explosion-proof current transformer outage is to realize the DC bus-bar voltage discharge by the low-resistance loop on grading resistor or the auxiliary electrical source plate, because the impedance of this discharge loop is bigger, so discharge time can be very long, often influence the preventive maintenance time of equipment, can not satisfy field requirement.And because this resistance is to be attempted by the dc bus two ends always, so this resistance volume is bigger, caloric value is bigger, makes troubles for the installation and the heat radiation aspect of system, particularly under the subsurface environment of colliery, equipment need be low to moderate the energy stored in the equipment below the 0.2mJ in 15 minutes.
Summary of the invention
The purpose of this utility model is at having some shortcomings such as explosion-proof current transformer discharge is slow, the discharge resistance performance number is big, caloric value is big, volume is big now, a kind of explosion-proof current transformer dc bus quick discharging circuit is provided, the mode of employing outage switching discharge resistance realizes the repid discharge of dc bus, utilize resistance to have the characteristics of very strong short-time overload capacity, can select for use power less, volume is less, the discharge resistance that resistance is less makes system have higher job stability and reliability, fail safe; Strengthen the maintenance and the maintenance efficiency of system, reduced the volume of equipment, reduced system cost.
For achieving the above object, the utility model is achieved through the following technical solutions:
Explosion-proof current transformer dc bus quick discharging circuit, comprise control power supply, gate-controlled switch class device, power discharge resistance, RCD capacitance-resistance absorption circuit, the control power supply is connected with the control end of gate-controlled switch class device, power discharge resistance and the positive and negative two ends that are connected to the dc bus pole plate that contains big electric capacity support that needs discharge after the contact switch of gate-controlled switch class device connect; RCD capacitance-resistance absorption circuit is connected to the two ends of gate-controlled switch class device contacts switch.Behind the system cut-off, by the electric and dead electricity that gets of control gate-controlled switch class device control end, thus control gate-controlled switch class device contacts switch connection and disconnection, thus realize switching on and off of discharge resistance, thus realize repid discharge.
Described gate-controlled switch class device is relay, contactor or thyristor.
Compare with the DC bus-bar voltage discharge loop after the outage of traditional current transformer, the utility model has the advantages that:
1) can in 15 minutes, be low to moderate below the 0.2mJ by fast that DC bus-bar voltage is stored energy.
2) have higher job stability and reliability, fail safe.
3) maintenance of enhanced system and maintenance efficiency.
4) reduce the volume of equipment, reduced system cost.
Description of drawings
Fig. 1 is the structural representation of explosion-proof current transformer dc bus quick discharging circuit.
Among the figure: the contact switch R-power discharge resistance C-electric capacity R1-resistance C1-electric capacity D1-diode 1-gate-controlled switch class device 2-of the control end K-gate-controlled switch class device of J-gate-controlled switch class device makees dc capacitor and the bus pole plate that direct current supports
Embodiment
See Fig. 1, explosion-proof current transformer dc bus quick discharging circuit comprises control power supply (comprising AC and DC), gate-controlled switch class device 1, power discharge resistance R, RCD capacitance-resistance absorption circuit.But gate-controlled switch class device 1 selective relay, contactor, thyristor etc.The control power supply is connected with the control end J of gate-controlled switch class device, power discharge resistance R and the positive and negative two ends that are connected to the dc bus pole plate that contains big capacitor C support that needs discharge after the contact switch K of gate-controlled switch class device connect.
RCD capacitance-resistance absorption circuit is made up of resistance R 1, diode D1, capacitor C 1.Resistance R 1 is connected with capacitor C 1 with after diode D1 is in parallel, is connected to the contact switch K two ends of gate-controlled switch class device, is used to absorb the electromagnetic interference of cut-offfing.
Operation principle of the present utility model is: behind the system cut-off, by the break-make of the contact switch K of gate-controlled switch class device in the control loop and the repid discharge that realizes dc-link capacitance C by the power discharge resistance R.Operating voltage range is at 0V to 2KV, its major function: behind the system cut-off, realize the repid discharge of dc-link capacitance, thereby realize that the stored energy of dc-link capacitance was low to moderate below the 0.2mJ in 15 minutes.
Claims (2)
1. explosion-proof current transformer dc bus quick discharging circuit, it is characterized in that, comprise control power supply, gate-controlled switch class device, power discharge resistance, RCD capacitance-resistance absorption circuit, the control power supply is connected with the control end of gate-controlled switch class device, power discharge resistance and the positive and negative two ends that are connected to the dc bus pole plate that contains big electric capacity support that needs discharge after the contact switch of gate-controlled switch class device connect; RCD capacitance-resistance absorption circuit is connected to the two ends of gate-controlled switch class device contacts switch.
2. explosion-proof current transformer dc bus quick discharging circuit according to claim 1 is characterized in that described gate-controlled switch class device is relay, contactor or thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200696575U CN201985522U (en) | 2011-03-16 | 2011-03-16 | DC bus rapid discharge circuit for anti-explosion current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200696575U CN201985522U (en) | 2011-03-16 | 2011-03-16 | DC bus rapid discharge circuit for anti-explosion current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985522U true CN201985522U (en) | 2011-09-21 |
Family
ID=44612974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200696575U Expired - Fee Related CN201985522U (en) | 2011-03-16 | 2011-03-16 | DC bus rapid discharge circuit for anti-explosion current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201985522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130449A (en) * | 2011-03-16 | 2011-07-20 | 辽宁荣信防爆电气技术有限公司 | Direct current bus quick discharge circuit of explosion-proof converter |
-
2011
- 2011-03-16 CN CN2011200696575U patent/CN201985522U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130449A (en) * | 2011-03-16 | 2011-07-20 | 辽宁荣信防爆电气技术有限公司 | Direct current bus quick discharge circuit of explosion-proof converter |
| WO2012122882A1 (en) * | 2011-03-16 | 2012-09-20 | 辽宁荣信防爆电气技术有限公司 | Fast discharging circuit for direct-current bus of anti-explosive converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 114051, Liaoning, Anshan MTR Eastern Science and technology road, No. 108 Patentee after: Liaoning Rongxin hi tech Electric Co., Ltd. Address before: 114051 Anshan high tech Zone, Liaoning province science and technology road, No. 108 Patentee before: Liaoning Rongxin Explosion-Proof Electrical Technology Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 114051, Liaoning, Anshan MTR Eastern Science and technology road, No. 108 Patentee after: Wolong electric group Liaoning Rongxin hi tech Electric Co., Ltd. Address before: 114051, Liaoning, Anshan MTR Eastern Science and technology road, No. 108 Patentee before: Liaoning Rongxin hi tech Electric Co., Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20180704 Address after: 114051 Anshan City, Liaoning, the East District of science and Technology Road No. 108 Patentee after: Wolong electric group Liaoning Rongxin electric drive Co., Ltd. Address before: 114051 Anshan City, Liaoning, the East District of science and Technology Road No. 108 Patentee before: Wolong electric group Liaoning Rongxin hi tech Electric Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20200316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |