CN202351363U - Novel ground fault warning device - Google Patents
Novel ground fault warning device Download PDFInfo
- Publication number
- CN202351363U CN202351363U CN2011204951046U CN201120495104U CN202351363U CN 202351363 U CN202351363 U CN 202351363U CN 2011204951046 U CN2011204951046 U CN 2011204951046U CN 201120495104 U CN201120495104 U CN 201120495104U CN 202351363 U CN202351363 U CN 202351363U
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- voltage relay
- voltage
- coil
- warning device
- fault warning
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Abstract
The utility model relates to a novel ground fault warning device. The device is characterized by comprising a direct-current power supply and a buzzer (BEEP) which are connected in series with each other, wherein a pair of normally-open contacts of a first voltage relay (J1) is connected in series between the direct-current power supply and the buzzer (BEEP); the two ends of the normally-open contacts are connected in parallel with a pair of normally-open contacts of a second voltage relay (J2); one end of a coil of the first voltage relay (J1) is connected with a zero line in a first bus, and the other end of the coil of the first voltage relay (J1) is grounded; and one end of a coil of the second voltage relay (J2) is connected with a zero line in a second bus, and the other end of the coil of the second voltage relay (J2) is grounded. Under the condition of normally operating an ungrounded system, zero sequence voltage is generated, and the relays cannot act. When the ungrounded system in a high-voltage chamber fails, the zero sequence voltage is generated on the ground in an unbalanced mode through three-phase voltage, the whole loop is switched on, an indicating lamp is lightened, and the buzzer emits warning sound to inform on-site working personnel to be quickly evacuated from a field, so that personal safety is ensured.
Description
Technical field
The utility model relates to a kind of novel earthing fault warning device.
Background technology
In the electric system; 35kV and following electric pressure protective device and primary equipment are integrated to be installed in the high-voltage chamber switch cabinet; Arrangements of elements is compact in the cabinet, the space is narrow and small relatively, in case ground connection or phase fault take place circuit, moment produces the break performance that high temperature can reduce isolating switch greatly; Can cause switch cubicle to be blasted when serious, jeopardize field personnel's personal safety.When primary equipment broke down, corresponding alarm window will be lighted on the control flow of the inside, pulpit, sends alarm signal simultaneously, and the operations staff in time handles according to alarm signal and phenomenon.As 35kV, extremely dangerous the personnel of high pressure office work when the 10kV isolated neutral system breaks down for just.If merely rely on the operations staff to find to inform that the field personnel withdraws after the dangerous situation, need the cost regular hour, this personal safety to the staff is totally unfavorable.
Because 35kV, 10kV electrical network are isolated neutral system; Earth point will produce intermittence electric arc and cause arc overvoltage through very big capacitance current when earth fault took place, and caused the break performance of insulation damages, reduction isolating switch; Thereby the blast of proximity switch cabinet, the life security that jeopardizes the staff.In recent years, the accident of electric system mesohigh chamber switch cubicle blast happens occasionally.
The utility model content
The purpose of the utility model provides a kind of novel earthing fault warning device, can when isolated neutral system breaks down, send caution, thereby guarantee personal safety.
A kind of novel earthing fault warning device; Its special feature is; Comprise the direct supply and the hummer that are in series; Between this direct supply and hummer, also be in series with a pair of normally opened contact of first voltage relay, also be parallel with a pair of normally opened contact of second voltage relay at these normally opened contact two ends; Wherein an end of the first voltage relay coil is connected and its other end ground connection with zero line in first bus, and an end of the second voltage relay coil is connected with zero line in second bus and also ground connection of its other end.
Wherein also be parallel with a pilot lamp at the hummer two ends, this pilot lamp is connected with a current-limiting resistance.
Wherein also be parallel with a testing button at a pair of normally opened contact two ends of first voltage relay.
Wherein at the other CS that also is in series with of direct supply.
Wherein direct supply is a battery.
Under the isolated neutral system normal operation, no residual voltage produces, and relay can not move.When isolated neutral system broke down in the hyperbaric chamber, imbalance of three-phase voltage produced residual voltage over the ground, when its definite value during greater than the working value (the residual voltage fixed value adjusting is 15V) of voltage relay; Use with the voltage relay of monitoring two groups of bus residual voltages in the hyperbaric chamber and will move, the normally opened contact of corresponding voltage relay is closed, the conducting of whole loop; Pilot lamp in the loop is lighted; Hummer sends alarm sound, informs that the field personnel withdraws the scene rapidly, guarantees personal safety.
Description of drawings
Accompanying drawing 1 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1; A kind of novel earthing fault warning device; Comprise the direct supply and the hummer BEEP that are in series; Between this direct supply and hummer BEEP, also be in series with a pair of normally opened contact of the first voltage relay J1, also be parallel with a pair of normally opened contact of the second voltage relay J2 at these normally opened contact two ends; Wherein an end of the first voltage relay J1 coil is connected and its other end ground connection with zero line in first bus, and an end of the second voltage relay J2 coil is connected with zero line in second bus and also ground connection of its other end.
Wherein also be parallel with a pilot lamp L1 at hummer BEEP two ends; This pilot lamp L1 connects with a current-limiting resistance; A pair of normally opened contact two ends at the first voltage relay J1 also are parallel with a testing button AN1, and at the other CS K1 that also is in series with of direct supply, direct supply adopts battery.
The principle of work of the utility model is:
When isolated neutral system breaks down, imbalance of three-phase voltage, the zero line in first and second bus produces residual voltage with respect to ground wire; The first voltage relay J1 or second voltage relay J2 action this moment; Normally opened contact is closed, and hummer BEEP gets electric alarm, and pilot lamp L1 lights simultaneously.Testing button AN1 can analogue relay action whether be used for testing apparatus normal, CS K1 can be used as the power switch of whole device.
Claims (5)
1. novel earthing fault warning device; It is characterized in that: comprise the direct supply and the hummer (BEEP) that are in series; Between this direct supply and hummer (BEEP), also be in series with a pair of normally opened contact of first voltage relay (J1), also be parallel with a pair of normally opened contact of second voltage relay (J2) at these normally opened contact two ends; Wherein an end of first voltage relay (J1) coil is connected and its other end ground connection with zero line in first bus, and an end of second voltage relay (J2) coil is connected with the zero line in second bus and also ground connection of its other end.
2. novel earthing fault warning device as claimed in claim 1 is characterized in that: wherein also be parallel with a pilot lamp (L1) at hummer (BEEP) two ends, this pilot lamp (L1) is connected with a current-limiting resistance.
3. novel earthing fault warning device as claimed in claim 1 is characterized in that: wherein also be parallel with a testing button (AN1) at a pair of normally opened contact two ends of first voltage relay (J1).
4. novel earthing fault warning device as claimed in claim 1 is characterized in that: wherein at the other CS (K1) that also is in series with of direct supply.
5. like any described novel earthing fault warning device in the claim 1 to 3, it is characterized in that: wherein direct supply is a battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204951046U CN202351363U (en) | 2011-12-02 | 2011-12-02 | Novel ground fault warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204951046U CN202351363U (en) | 2011-12-02 | 2011-12-02 | Novel ground fault warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351363U true CN202351363U (en) | 2012-07-25 |
Family
ID=46540359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204951046U Expired - Fee Related CN202351363U (en) | 2011-12-02 | 2011-12-02 | Novel ground fault warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202351363U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830322A (en) * | 2012-08-08 | 2012-12-19 | 重庆市电力公司万州供电局 | Voltage relay based bus grounding alarm device and alarm method thereof |
| CN103235229A (en) * | 2013-04-02 | 2013-08-07 | 国家电网公司 | High-voltage indoor line grounding alarming device |
-
2011
- 2011-12-02 CN CN2011204951046U patent/CN202351363U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830322A (en) * | 2012-08-08 | 2012-12-19 | 重庆市电力公司万州供电局 | Voltage relay based bus grounding alarm device and alarm method thereof |
| CN102830322B (en) * | 2012-08-08 | 2015-12-09 | 国家电网公司 | Based on busbar grounding warning device and the alarm method thereof of voltage relay |
| CN103235229A (en) * | 2013-04-02 | 2013-08-07 | 国家电网公司 | High-voltage indoor line grounding alarming 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: 20120725 Termination date: 20141202 |
|
| EXPY | Termination of patent right or utility model |