CN205193147U - Transmission line ground connection step voltage detection device - Google Patents
Transmission line ground connection step voltage detection device Download PDFInfo
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- CN205193147U CN205193147U CN201520871628.9U CN201520871628U CN205193147U CN 205193147 U CN205193147 U CN 205193147U CN 201520871628 U CN201520871628 U CN 201520871628U CN 205193147 U CN205193147 U CN 205193147U
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- alarm device
- relay
- voltage
- power supply
- ground connection
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Abstract
The utility model discloses a transmission line ground connection step voltage detection device, the device includes: insulating handle, alarm device and two ground connection probes, insulating handle with alarm device connects, alarm device with two ground connection probe electric connection, the step voltage of transmission line ground connection is introduced to two ground connection probes, alarm device detects voltage between two ground connection probe and / electric current and when reaching the threshold value, voltage or electric current report an emergency and ask for help or increased vigilance. The utility model discloses can be applied to the single -phase ground connection of transmission line, the indefinite troubleshooting scene of patrolling need detection step voltage such as line of ground point, carry out step voltage's detection and warning, prevent to salvage personnel and take place to stride a step electric shock accidents.
Description
Technical field
The utility model relates to transmission line faultlocating technical field, particularly relates to a kind of transmission line of electricity ground connection step voltage pick-up unit.
Background technology
10kV transmission line of electricity is isolated neutral system, and when circuit generation single-phase earthing, 10kV line protective devices allow circuit single-phase earthing run 2 hours and be failure to actuate.Be grounding in 10kV line protective devices course of action at circuit; electric current goes out from earthing pole four diffusing, the inherent ground of certain limit, distance ground connection place is formed the different Potential distribution centered by wire pick-up point, from pick-up point more away from; electric current is overstepping the bounds of propriety loose, and ground potential is also lower.If just step voltage electric shock accidents may be there is within standing in distance 8 ~ 10 meters, electric wire pick-up point in people or livestock.
Therefore a kind of portable step voltage pick-up unit is needed, time power supply department earth wire road carries out overhauling, can allow the step voltage of scene rush to repair personnel before carrying out repairing near fast and convenient detection line earth point, prevent from, in repairing work, step voltage electric shock accidents occurs.Still do not have at present the fast and convenient step voltage to circuit single-phase earthing to detect and the device of alarm.
Utility model content
For solving the technical matters of existing existence, the utility model provides a kind of transmission line of electricity ground connection step voltage pick-up unit.
For achieving the above object, the technical solution of the utility model is achieved in that
A kind of transmission line of electricity ground connection step voltage pick-up unit, described device comprises: insulation handle, alarm device and two grounded probes; Described insulation handle is connected with described alarm device, and described alarm device and described two grounded probes are electrically connected; Described two grounded probes introduce the step voltage of transmission line of electricity ground connection, and described alarm device detects voltage between described two grounded probes and/electric current and carries out alarm when described voltage or electric current reach threshold value.
Wherein, described insulation handle is telescopic insulation rod.
Wherein, described insulation handle is connected with described alarm device by guide bearing.
Wherein, described alarm device comprises: overvoltage relay, power supply and alarm device; Wherein, described power supply and alarm device composition loop, and controlled by described overvoltage relay; Described overvoltage relay is in parallel with described two grounded probes, and by detecting loop conducting described in the Control of Voltage between described two grounded probes.
Wherein, described alarm device comprises: trimmable resistance, overcurrent relay, power supply and alarm device; Wherein, described power supply and alarm device composition loop, and controlled by described overcurrent relay; Described trimmable resistance, overcurrent relay are connected with described two grounded probes, and described overcurrent relay flows through loop conducting described in the Current Control of described trimmable resistance by detection.
Wherein, described alarm device comprises: overvoltage relay, trimmable resistance, overcurrent relay, relay auxiliary contact, power supply and alarm device;
Wherein, described relay auxiliary contact, power supply and alarm device composition loop, described relay auxiliary contact is controlled by described overvoltage relay and overcurrent relay;
Described overvoltage relay is in parallel with described two grounded probes, and by detecting relay auxiliary contact described in the Control of Voltage between described two grounded probes;
Described trimmable resistance, overcurrent relay are connected with described two grounded probes, and described overcurrent relay flows through relay auxiliary contact described in the Current Control of described trimmable resistance by detection.
Wherein, described alarm device comprises stand by lamp and/or hummer.
Wherein, described stand by lamp is LED stand by lamp.
Wherein, described power supply is battery.
Wherein, described battery is accumulator or rechargeable battery.
The transmission line of electricity ground connection step voltage pick-up unit of the utility model embodiment, be specially the device of the detection of a kind of step voltage to circuit single-phase earthing and alarm, portable, reliable, structure is simple, operation is convenient, the breakdown repair scene that transmission line of electricity single-phase earthing, the indefinite line walking of earth point etc. need detect step voltage can be applied to, carry out detection and the warning of step voltage, prevent repair personnel to stride electric shock accidents.
Accompanying drawing explanation
In accompanying drawing (it is not necessarily drawn in proportion), similar Reference numeral can describe similar parts in different views.The similar reference numerals with different letter suffix can represent the different examples of similar parts.Accompanying drawing generally shows each embodiment discussed herein by way of example and not limitation.
Fig. 1 is the composition structural representation of the utility model embodiment transmission line of electricity ground connection step voltage pick-up unit;
Fig. 2 is the vertical view of the utility model embodiment transmission line of electricity ground connection step voltage pick-up unit;
Fig. 3 is the structural representation of the utility model embodiment alarm device example;
Fig. 4 is the structural representation of the another example of the utility model embodiment alarm device;
Fig. 5 is the structural representation of the another example of the utility model embodiment alarm device.
Embodiment
As shown in Figure 1, 2, the transmission line of electricity ground connection step voltage pick-up unit of the utility model embodiment can comprise: two grounded probes, alarm device and insulation handles; Wherein, two grounded probes and described alarm device are electrically connected, and described insulation handle is connected with described alarm device.Described two grounded probes introduce the step voltage of described transmission line of electricity ground connection, and described alarm device detects voltage between described two grounded probes and/electric current and carries out alarm when described voltage or electric current reach threshold value.In practical application, be connected by wire between alarm device with grounded probe.
In practical application, described insulation handle can be connected with alarm device by guide bearing, to facilitate installation, to carry; Insulation handle can adopt telescopic insulation rod, and telescopic insulation rod described in this is that insulating material is made, and can reach the 220kV class of insulation, is convenient to staff and detects the length needing the handle of adjustment insulation in real time according to reality, guarantee safety.
Described two grounded probes be used for simulation human body stride, can with ground reliable contacts, for introducing the step voltage of transmission line of electricity ground connection.Distance between two grounded probes is equivalent to the distance that human body strides, such as, can arrange between two grounded probes at a distance of 80cm.
Described alarm device can comprise trimmable resistance, overvoltage relay, overcurrent relay, relay auxiliary contact, power supply and alarm device.
Concrete, alarm device can only comprise overvoltage relay, power supply and alarm device, power supply and alarm device composition loop, and the break-make in described loop controls by described overvoltage relay; Described overvoltage relay is in parallel with described two grounded probes.Overvoltage relay detects voltage between described two grounded probes and the action when described voltage meets or exceeds voltage threshold, and the closing of contact, then the loop conducting of power supply and alarm device composition, alarm device sends alarm.Here voltage threshold can set according to actual needs, such as, can be set to 24V.Here, alarm device topology example as shown in Figure 3, in the loop that can also form at power supply and alarm device, a relay auxiliary contact is set, this relay auxiliary contact closes, the then loop conducting of power supply and alarm device composition, alarm device sends alarm, and this relay auxiliary contact disconnects, then the loop of power supply and alarm device composition disconnects, and alarm device stops alarm.This relay auxiliary contact controls by described overvoltage relay.Overvoltage relay detects the voltage between described two grounded probes, the action when described voltage meets or exceeds voltage threshold, and relay auxiliary contact closes; Overvoltage relay detects the voltage between described two grounded probes, and be failure to actuate when described voltage is less than voltage threshold, relay auxiliary contact remains open state.In example as shown in Figure 3, alarm device can comprise LED stand by lamp and/or hummer, sends audible and visual alarm.For ease of carrying, power supply can select battery, and battery can be accumulator, also can be rechargeable battery, can configure according to actual needs.
Concrete, alarm device can also only comprise trimmable resistance, overcurrent relay, power supply and alarm device, wherein, power supply and alarm device composition loop, and the break-make in described loop controls by described overcurrent relay; Described trimmable resistance, overcurrent relay are connected with two grounded probes, the electric current flowing through described trimmable resistance is the electric current produced because of step voltage between described two grounded probes, described overcurrent relay detects the electric current flowing through described trimmable resistance, the action when described electric current meets or exceeds current threshold, the closing of contact, the then loop conducting of power supply and alarm device composition, alarm device sends alarm.Here current threshold can set according to actual needs, such as, can be set to 10mA.Here, alarm device topology example as shown in Figure 4, in the loop that can also form at power supply and alarm device, relay auxiliary contact is set, this relay auxiliary contact closes, the then loop conducting of power supply and alarm device composition, alarm device sends alarm, and this relay auxiliary contact disconnects, then the loop of power supply and alarm device composition disconnects, and alarm device stops alarm.This relay auxiliary contact controls by described overcurrent relay.Overcurrent relay detects the electric current (electric current namely produced because of step voltage between described two grounded probes) flowing through described trimmable resistance, the action when described electric current meets or exceeds current threshold, and relay auxiliary contact closes; Be failure to actuate when described electric current is less than current threshold, relay auxiliary contact remains open state.In example as shown in Figure 4, alarm device can comprise LED stand by lamp and/or hummer, sends audible and visual alarm.For ease of carrying, power supply can select battery, and battery can be accumulator, also can be rechargeable battery, can configure according to actual needs.
Concrete, in alarm device example as shown in Figure 5, alarm device can only comprise trimmable resistance, overcurrent relay, overvoltage relay, power supply and alarm device, power supply and alarm device composition loop, and the break-make in described loop is subject to the control of described overvoltage relay and/or overcurrent relay; Described overvoltage relay is in parallel with described two grounded probes.Overvoltage relay detects voltage between described two grounded probes and the action when described voltage meets or exceeds voltage threshold, and the closing of contact, then the loop conducting of power supply and alarm device composition, alarm device sends alarm.Described trimmable resistance, overcurrent relay are connected with two grounded probes, the electric current flowing through described trimmable resistance is the electric current produced because of step voltage between described two grounded probes, described overcurrent relay detects the electric current flowing through described trimmable resistance, the action when described electric current meets or exceeds current threshold, the closing of contact, the then loop conducting of power supply and alarm device composition, alarm device sends alarm.Here, overcurrent relay and overvoltage relay can control the loop of power supply and alarm device composition simultaneously, like this, are no matter that voltage over standard or electric current exceed standard all can trigger alerts, more accurate to the step voltage fault detect of transmission line of electricity.Here voltage threshold is relevant with the holding capacity of human body to voltage, can set according to actual needs, such as, within being 24V at present, can be set to 24V to the voltage of human-body safety.Current threshold is relevant with the holding capacity of human body to electric current, can set according to actual needs, and such as, current human-body safety electric current is within 10mA, therefore can be set to 10mA.
Here, alarm device topology example as shown in Figure 5, in the loop that can also form at power supply and alarm device, a relay auxiliary contact is set, this relay auxiliary contact is that overvoltage relay and overcurrent relay share, and this relay auxiliary contact closes, then the loop conducting of power supply and alarm device composition, alarm device sends alarm, this relay auxiliary contact disconnects, then the loop of power supply and alarm device composition disconnects, and alarm device stops alarm.This relay auxiliary contact is subject to the control of described overvoltage relay and overcurrent relay simultaneously.Overvoltage relay detects the voltage between described two grounded probes, the action when described voltage meets or exceeds voltage threshold, and relay auxiliary contact closes; Overcurrent relay detects the electric current (electric current namely produced because of step voltage between described two grounded probes) flowing through described trimmable resistance, the action when described electric current meets or exceeds current threshold, and relay auxiliary contact closes.In addition, relay auxiliary contact remains open state.In example as shown in Figure 5, alarm device can comprise LED stand by lamp and/or hummer, sends audible and visual alarm.For ease of carrying, power supply can select battery, and battery can be accumulator, also can be rechargeable battery, can configure according to actual needs.
The beneficial effects of the utility model are: provide that a kind of portable, reliable, structure is simple, operation transmission line of electricity step voltage testing fixture easily, be specially the device of the detection of a kind of step voltage to circuit single-phase earthing and alarm, the breakdown repair scene that transmission line of electricity single-phase earthing, the indefinite line walking of earth point etc. need detect step voltage can be applied to, carry out detection and the warning of step voltage, prevent repair personnel to stride electric shock accidents.
The above, be only preferred embodiment of the present utility model, is not intended to limit protection domain of the present utility model.
Claims (10)
1. a transmission line of electricity ground connection step voltage pick-up unit, is characterized in that, described device comprises: insulation handle, alarm device and two grounded probes; Described insulation handle is connected with described alarm device, and described alarm device and described two grounded probes are electrically connected; Described two grounded probes introduce the step voltage of transmission line of electricity ground connection, and described alarm device detects voltage between described two grounded probes and/electric current and carries out alarm when described voltage or electric current reach threshold value.
2. pick-up unit according to claim 1, is characterized in that, described insulation handle is telescopic insulation rod.
3. pick-up unit according to claim 1 and 2, is characterized in that, described insulation handle is connected with described alarm device by guide bearing.
4. pick-up unit according to claim 1, is characterized in that, described alarm device comprises: overvoltage relay, power supply and alarm device; Wherein, described power supply and alarm device composition loop, and controlled by described overvoltage relay; Described overvoltage relay is in parallel with described two grounded probes, and by detecting loop conducting described in the Control of Voltage between described two grounded probes.
5. pick-up unit according to claim 1, is characterized in that, described alarm device comprises: trimmable resistance, overcurrent relay, power supply and alarm device; Wherein, described power supply and alarm device composition loop, and controlled by described overcurrent relay; Described trimmable resistance, overcurrent relay are connected with described two grounded probes, and described overcurrent relay flows through loop conducting described in the Current Control of described trimmable resistance by detection.
6. pick-up unit according to claim 1, is characterized in that, described alarm device comprises: overvoltage relay, trimmable resistance, overcurrent relay, relay auxiliary contact, power supply and alarm device;
Wherein, described relay auxiliary contact, power supply and alarm device composition loop, described relay auxiliary contact is controlled by described overvoltage relay and overcurrent relay;
Described overvoltage relay is in parallel with described two grounded probes, and by detecting relay auxiliary contact described in the Control of Voltage between described two grounded probes;
Described trimmable resistance, overcurrent relay are connected with described two grounded probes, and described overcurrent relay flows through relay auxiliary contact described in the Current Control of described trimmable resistance by detection.
7. the pick-up unit according to claim 4,5 or 6, is characterized in that, described alarm device comprises stand by lamp and/or hummer.
8. pick-up unit according to claim 7, is characterized in that, described stand by lamp is LED stand by lamp.
9. the pick-up unit according to claim 4,5 or 6, is characterized in that, described power supply is battery.
10. device according to claim 9, is characterized in that, described battery is accumulator or rechargeable battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520871628.9U CN205193147U (en) | 2015-11-04 | 2015-11-04 | Transmission line ground connection step voltage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520871628.9U CN205193147U (en) | 2015-11-04 | 2015-11-04 | Transmission line ground connection step voltage detection device |
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| Publication Number | Publication Date |
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| CN205193147U true CN205193147U (en) | 2016-04-27 |
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| CN201520871628.9U Active CN205193147U (en) | 2015-11-04 | 2015-11-04 | Transmission line ground connection step voltage detection device |
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| CN (1) | CN205193147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114267154A (en) * | 2021-12-14 | 2022-04-01 | 广东电网有限责任公司江门供电局 | Wading touch electric induction response alarm device |
-
2015
- 2015-11-04 CN CN201520871628.9U patent/CN205193147U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114267154A (en) * | 2021-12-14 | 2022-04-01 | 广东电网有限责任公司江门供电局 | Wading touch electric induction response alarm device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Longhua District of Hainan city in Haikou province 570311 Hai posterior No. 23 Patentee after: Hainan Electric Power Grid Co., Ltd. Electric Power Research Institute Address before: Building Letter No. 123-8 Binhai Road 570105 Hainan city of Haikou province 13 Patentee before: Hainan Power Technology Research Institute |
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| CP03 | Change of name, title or address |