CN201877781U - Ground power overvoltage reversed-polarity protector of power system - Google Patents
Ground power overvoltage reversed-polarity protector of power system Download PDFInfo
- Publication number
- CN201877781U CN201877781U CN2010201293825U CN201020129382U CN201877781U CN 201877781 U CN201877781 U CN 201877781U CN 2010201293825 U CN2010201293825 U CN 2010201293825U CN 201020129382 U CN201020129382 U CN 201020129382U CN 201877781 U CN201877781 U CN 201877781U
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- control relay
- lead
- ground
- switching diode
- links together
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Abstract
The utility model discloses a ground overvoltage reversed-polarity protector of a power system. The protector comprises a ground power socket 31P, a circuit protective breaker 32P, a voltage sensitive switch T7, a first switch diode D5, a second switch diode D6, a first control relay R3, a second control relay R4 and a ground power grid-connected contactor K6, wherein the circuit protector breaker 32P, the voltage sensitive switch T7, the second switch diode D6 and the second control relay R4 are connected with one another in series to form an overvoltage delay control circuit part; and the ground power socket 31P, the first switch diode D5 and the first control relay R3 are connected with each other in series to form a control circuit part. In the utility model, the voltage sensitive switch is disposed in the protector, so that power is not supplied to an equipment grid when the voltage of the ground power is too high; the switch diodes have the characteristic of one-way conduction, so that the switch diodes can prevent the ground power from being input into the equipment grid to protect electric equipment and a power supply circuit when the polarity input by the ground power is opposite to the polarity of the equipment grid.
Description
Technical field
The utility model belongs to power protection, relates to power-supply system overvoltage reverse polarity protection equipment.
Background technology
At present general general-purpose aircraft is not provided with the ground power supply overvoltage crowbar, and when the ground power supply polarity that is incorporated into the power networks is opposite with aircraft electrical network polarity, can cause part to damage the circuit of power-supply system.
Summary of the invention
The purpose of this utility model is: design a kind of protector that ground power supply is carried out overvoltage and reverse polarity protection.
The technical solution of the utility model is: a kind of power-supply system ground power supply overvoltage reverse polarity protection device, comprise ground supply socket 31P, route protection circuit breaker 32P, voltage-sensitive switch T7, switching diode one D5, switching diode two D6, control relay one R3, control relay two R4, the ground power supply contactor K6 that is incorporated into the power networks; Route protection circuit breaker 32P, voltage-sensitive switch T7, switching diode two D6, control relay two R4 are composed in series overvoltage delay control circuit part; Ground supply socket 31P, switching diode one D5, control relay one R3 are composed in series the control circuit part; Ground supply socket 31P positive pole links together by be incorporated into the power networks contactor K6 make contact and switching diode one D5 of lead and ground power supply; Switching diode one D5 links together by lead and control relay one R3 coil contact; Control relay one R3 coil contact links together by lead and electrical network negative terminal; Ground supply socket 31P negative pole links together by lead and electrical network negative terminal; Ground supply socket 31P main track control end links together by lead and route protection circuit breaker 32P; Route protection circuit breaker 32P links together by lead and voltage-sensitive switch T7 and control relay one R3 make contact; Voltage-sensitive switch T7 links together by lead and switching diode two D6; Switching diode two D6 link together by lead and control relay two R4 coil contacts; Control relay two R4 coil contacts link together by lead and electrical network negative terminal; 2 make contact that 2 groups of control relay two R4 moving closes in the parts link together with 2 groups of moving 2 make contact of closing in the parts of control relay one R3 respectively by lead; 2 make contact in addition that 2 groups of control relay two R4 moving closes in the parts link together with the be incorporated into the power networks coil contact of contactor K6 of ground power supply respectively by lead.
The utility model has the advantages that: owing in protector, be provided with voltage-sensitive switch T7, when guaranteeing the ground power supply overtension not to the equipment mains supply; Again because switching diode D5, D6 have the characteristic of unidirectional conducting, when guaranteeing that the polarity of ground power supply input is opposite with equipment electrical network polarity, can stop ground power supply to be input in the equipment electrical network, the power consumption equipment and the supply line of equipment protected.
Description of drawings
Fig. 1 is the original ground power supply line map that is incorporated into the power networks;
Fig. 2 is the utility model power supply overvoltage reverse polarity protection device schematic diagram.
Embodiment
Below the utility model is described in further details.
In Fig. 1, ground power supply is by ground supply socket 31P input electrical network, as long as its voltage can make the actuating coil adhesive of contactor 72P, ground power supply just can insert the whole electrical network of aircraft.But,, some power consumption equipments of aircraft are damaged because of overtension in case insert the overtension of aircraft electrical network; When the electric power polarity of ground power supply input is opposite with aircraft electrical network polarity, actuating coil meeting adhesive of contactor 72P because the buffer action of diode is not worked, prevent that ground power supply is connected to the grid, but the lead PB13-20 in the power circuit, diode 84P and lead PB10-18N can constitute short-circuit loop and burn.
" PB2-2N " among Fig. 1, " PB5-2 ", " PB11-20 ", " PB10-18N ", " PB13-20 " reach the lead wire size that " PB6-18N " represents to connect between each component part electric wire, wire size (with PB2-2N is example, all the other same PB2-2N) composed as follows:
In Fig. 2, ground supply socket 31P, switching diode D5, control relay R3 are composed in series the control circuit part; Ground supply socket 31P positive pole links together by be incorporated into the power networks contactor K6 make contact and switching diode D5 of lead and ground power supply; Switching diode D5 links together by lead and control relay R3 coil contact; Control relay R3 coil contact links together by lead and electrical network negative terminal; Ground supply socket 31P negative pole links together by lead and electrical network negative terminal; Ground supply socket 31P main track control end links together by lead and route protection circuit breaker 32P; Route protection circuit breaker 32P links together by lead and voltage-sensitive switch T7 and control relay R3 make contact; Voltage-sensitive switch T7 links together by lead and switching diode D6; Switching diode D6 links together by lead and control relay R4 coil contact; Control relay R4 coil contact links together by lead and electrical network negative terminal; 2 make contact that 2 groups of control relay R4 moving closes in the parts link together with 2 groups of moving 2 make contact of closing in the parts of control relay R3 respectively by lead; 2 make contact in addition that 2 groups of control relay R4 moving closes in the parts link together with the be incorporated into the power networks coil contact of contactor K6 of ground power supply respectively by lead; Ground power supply is by ground supply socket 31P input aircraft electrical network, when the ground supply voltage is higher than 33V, T7 time-delay 50ms disconnects, the actuating coil of control relay R4 is disconnected, and ground power supply disconnect (loss of voltage) before T7 can not connect once more, guarantee that control relay R4 and the ground power supply contactor K6 that is incorporated into the power networks does not work, and prevents that ground power supply from being the aircraft mains supply; When the ground power supply drops into the polarity of electrical network when opposite with aircraft electrical network polarity by 31P, the actuating coil circuit of switching diode D5 and D6 block system relay R3 and R4, relay R 3, R4 do not work, and contactor K6 is not also worked, and prevent that ground power supply from being the aircraft mains supply.
Power-supply system ground power supply overvoltage reverse polarity protection device is applied in the design of certain type aircraft power system, realizes that each parts important technological parameters of its function is as follows:
Voltage-sensitive switch T7:33 ± 1V, time-delay 50 ± 5ms
Route protection circuit breaker 32P: rated current 5A
Switching diode: specified forward operating current is 1A
Control relay R3, R4: rated voltage: 28V, rated current: 12A, coil resistance: 290 Ω
The ground power supply contactor K6 that is incorporated into the power networks: rated voltage: 28V, rated current: 400A
Claims (1)
1. power-supply system ground power supply overvoltage reverse polarity protection device, comprise ground supply socket (31P), route protection circuit breaker (32P), voltage-sensitive switch (T7), switching diode one (D5), switching diode two (D6), control relay one (R3), control relay two (R4), the ground power supply contactor (K6) that is incorporated into the power networks; It is characterized in that route protection circuit breaker (32P), voltage-sensitive switch (T7), switching diode two (D6), control relay two (R4) are composed in series overvoltage delay control circuit part; Ground supply socket (31P), switching diode one (D5), control relay one (R3) are composed in series the control circuit part; Ground supply socket (31P) is anodal to link together by be incorporated into the power networks contactor (K6) make contact and switching diode one (D5) of lead and ground power supply; Switching diode one (D5) links together by lead and control relay one (R3) coil contact; Control relay one (R3) coil contact links together by lead and electrical network negative terminal; Ground supply socket (31P) negative pole links together by lead and electrical network negative terminal; Ground supply socket (31P) main track control end links together by lead and route protection circuit breaker (32P); Route protection circuit breaker (32P) links together by lead and voltage-sensitive switch (T7) and control relay one (R3) make contact; Voltage-sensitive switch (T7) links together by lead and switching diode two (D6); Switching diode two (D6) links together by lead and control relay two (R4) coil contact; Control relay two (R4) coil contact links together by lead and electrical network negative terminal; 2 make contact that 2 groups of control relay two (R4) moving closes in the parts link together with 2 groups of moving 2 make contact of closing in the parts of control relay one (R3) respectively by lead; 2 make contact in addition that 2 groups of control relay two (R4) moving closes in the parts link together with the be incorporated into the power networks coil contact of contactor (K6) of ground power supply respectively by lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201293825U CN201877781U (en) | 2010-03-12 | 2010-03-12 | Ground power overvoltage reversed-polarity protector of power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201293825U CN201877781U (en) | 2010-03-12 | 2010-03-12 | Ground power overvoltage reversed-polarity protector of power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877781U true CN201877781U (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201293825U Expired - Fee Related CN201877781U (en) | 2010-03-12 | 2010-03-12 | Ground power overvoltage reversed-polarity protector of power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201877781U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258482A (en) * | 2017-12-14 | 2018-07-06 | 沈阳兴华航空电器有限责任公司 | Direct current external power plate connector |
| CN108418444A (en) * | 2018-04-10 | 2018-08-17 | 厦门亿联网络技术股份有限公司 | A kind of POE bidirectional power supplies device |
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
-
2010
- 2010-03-12 CN CN2010201293825U patent/CN201877781U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
| US11404867B2 (en) | 2012-12-03 | 2022-08-02 | Huawei Techologies Co., Ltd. | Overvoltage protection apparatus and method |
| CN108258482A (en) * | 2017-12-14 | 2018-07-06 | 沈阳兴华航空电器有限责任公司 | Direct current external power plate connector |
| CN108418444A (en) * | 2018-04-10 | 2018-08-17 | 厦门亿联网络技术股份有限公司 | A kind of POE bidirectional power supplies device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20150312 |
|
| EXPY | Termination of patent right or utility model |