CN108759102A - Grounding structure, electric water heater and control method - Google Patents
Grounding structure, electric water heater and control method Download PDFInfo
- Publication number
- CN108759102A CN108759102A CN201810176138.5A CN201810176138A CN108759102A CN 108759102 A CN108759102 A CN 108759102A CN 201810176138 A CN201810176138 A CN 201810176138A CN 108759102 A CN108759102 A CN 108759102A
- Authority
- CN
- China
- Prior art keywords
- electric
- current
- ground
- electric heater
- liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000005485 electric heating Methods 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
- F24H1/202—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention discloses a grounding structure, an electric water heater and a control method, and relates to the technical field of water heaters. The grounding structure is characterized in that a current detection device is arranged on a lead between a grounding terminal and a grounding electrode of an electric appliance, a switch circuit is connected in series in a power supply circuit of the electric appliance, and the current detection device is used for detecting the current on a grounding circuit and controlling the switch circuit to be switched off according to the detected current. The grounding structure judges whether leakage current causes potential safety hazards to an electric appliance and a user according to the detected current on the grounding circuit, if the potential safety hazards exist, the power supply of the electric appliance is cut off through the switch circuit, and the electric appliance is stopped, so that the current in the grounding circuit is prevented from being conducted into the electric appliance, and the electric appliance is prevented from being damaged or the life safety of the user is prevented from being damaged.
Description
Technical field
The present invention relates to a kind of technical field of water heaters more particularly to ground structure, electric heater and control methods.
Background technology
The safety problem of household appliances is always hot spot of people's attention.Electric heater is common a kind of in people's life
Electric equipment products will directly jeopardize the life security of user, therefore the electricity consumption peace of electric heater if electrical leakage problems occurs in electric heater
Full problem is particularly important.
Existing electric heater is typically provided with ground terminal, is connected by conducting wire between ground terminal and earthing pole, from
And electric heater leakage current is exported.Since the electric appliance type in daily life is more, there are multiple household electrical appliance with public affairs
Altogether the case where ground wire connection so that be connection between multiple electric appliances.When drain conditions occurs in a certain electric appliance, can cause public
There are voltages, voltage to be conducted by common ground to other electric appliances on ground wire, the power utilization environment of electric appliance is influenced, to occur
Security risk endangers the life security of user.
Invention content
An object of the present invention is to provide a kind of ground structures, can avoid connect with ground wire electrical leakage
And other electric appliances are influenced, ensure that electric appliance has the power utilization environment of safety, to avoid the occurrence of security risk.
For this purpose, the present invention uses following technical scheme：
A kind of ground structure is provided with current sensing means on the sub conducting wire between earthing pole of electrical ground,
Tandem tap circuit in the power supply circuit of the electric appliance, the electric current that the current sensing means is used to detect on ground path are big
It is small, and the switching circuit is controlled according to the size of current of detection and is disconnected.
Wherein, the current sensing means includes current transformer.
Wherein, the switching circuit includes relay.
Wherein, it is provided with resistance on the ground path.
It is another object of the present invention to propose a kind of electric heater, the ground structure good reliability of the electric heater,
The electric current on ground path can be avoided to conduct to electric heater, to ensure the normal use of electric heater, improve electric heating
The safety of hydrophone.
For this purpose, the present invention uses following technical scheme：
A kind of ground terminal of electric heater, including liner and electric heating tube, the liner and/or the electric heating tube with
It is provided with current sensing means on conducting wire between earthing pole, the tandem tap circuit in the power supply circuit of the water heater, institute
It states current sensing means and controls the switch electricity for detecting the size of current on ground path, and according to the size of current of detection
Road disconnects.
Wherein, it is provided with resistance on the ground path.
Wherein, the resistance is variable resistance.
Wherein, the ground terminal of the liner is set on its outer side surface.
Wherein, the ground terminal of the liner be set to the electric heater water inlet pipe and/or outlet pipe with it is described interior
The junction of courage.
Wherein, the ground terminal of the electric heating tube is set on the flange of the electric heating tube end.
Another object of the present invention is to propose a kind of control method of electric heater, which can be to avoid connecing
In the electric current reverse conduction to electric heater of ground wire road, to ensure that user's is safe to use.
For this purpose, the present invention uses following technical scheme：
A kind of control method of electric heater, detect electric heater liner and/or electric heating tube ground terminal with connect
The electric current on conducting wire between earth polar cuts off the electric heater when the electric current is more than default maximum leakage current value
Power supply.
Advantageous effect：The present invention provides a kind of ground structure, electric heater and control methods.Ground junction in the present invention
Current sensing means, and the tandem tap in the power supply circuit of electric appliance is arranged on the conducting wire between ground terminal and earthing pole in structure
Circuit judges whether leakage current causes security risk to electric appliance and user according to the size of current on detection ground path,
If there are security risk, the power supply of electric appliance is cut off by switching circuit, stops the use of electric appliance, to avoid in ground path
Electric current conduct into electric appliance, and then avoid damage electric appliance or endanger user's life security.
Description of the drawings
Fig. 1 is the structural schematic diagram one of electric heater provided by the invention；
Fig. 2 is the structural schematic diagram two of electric heater provided by the invention；
Fig. 3 is the structural schematic diagram three of electric heater provided by the invention；
Fig. 4 is the structural schematic diagram four of electric heater provided by the invention；
Fig. 5 is the structural schematic diagram of water inlet pipe provided by the invention；
Fig. 6 is the flow chart of the control method of electric heater provided by the invention.
Wherein：
11, ground path；12, current transformer；
21, liner；22, shell；23, water inlet pipe；231, connecting pin；232, inner tube；233, outer tube；234, sheet metal；24,
Outlet pipe；25, electric heating tube；26, flange.
Specific implementation mode
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution further illustrated the present invention in conjunction with attached drawing and by specific implementation mode.
A kind of ground structure is present embodiments provided, electricity is provided on the conducting wire between electrical ground and earthing pole
Flow detection device is in series with switching circuit in the power supply circuit of electric appliance, and current sensing means is for detecting electric current on ground path
Size, and according to the size of current of detection control switching circuit disconnect.Wherein, electric appliance can be the electricity such as electric heater, refrigerator
Device equipment.For convenience of introduction, below by taking electric heater as an example.
As shown in Figure 1, electric heater includes shell 22, the liner 21, water inlet pipe 23, the outlet pipe 24 that are set in shell 22
And electric heating tube 25.Water inlet pipe 23 and outlet pipe 24 are connected to liner 21, and electric heating tube 25 is located in liner 21, end
It is fixed on liner 21 by flange 26.Ground structure is arranged on the conducting wire between the ground terminal and earthing pole of electric heater
There is current sensing means, and is in series with switching circuit in the power supply circuit of electric heater.When there is leaky in electric heater,
Electric current can be conducted by ground path 11 to ground wire, to export the leakage current in electric heater, user be avoided to get an electric shock.
Wherein, ground wire can be common ground, and common ground can be connect with multiple electric appliances.
Due to that can be connected with multiple electric appliances on ground wire, when one of electrical leakage, on ground wire will have voltage deposits
, and multiple electric appliances are in the state of mutual conduction, cause voltage that can be conducted by ground wire to other electrical equipments.To solve
The above problem, the ground structure in the present embodiment are provided with current sensing means and switching circuit, and current sensing means is mainly used
Size of current on detection ground path 11, judges whether it can influence electric heater just by the size of current detected
The often life security of work and user disconnects to control switching circuit according to judging result, cuts off the power supply of electric heater
Break-make.
To make the multiple electrical devices being connect with ground wire be connect there are one the power utilization environment of safety when current sensing means detects
Size of current on ground circuit 11 there are when security risk, while cutting off the power supply of electric heater, goes back electric appliance or user
Can disconnect ground wire connection so that multiple electric appliances connect with ground wire it is separated, avoid electric leakage electric appliance electrical leakage voltage continuation
It is conducted to other electric appliances by ground wire, to ensure the power utilization environment safety of multiple electric appliances.
Specifically, current sensing means may include current transformer 12, and switching circuit includes relay.Relay is arranged
In on the power cord of electric heater, current transformer 12 is connect with ground path 11 and relay respectively.Current transformer 12 is used
In detecting the size of current in ground path 11, and current signal is sent to relay.Relay is a kind of electronic control device,
It controls the break-make of electric heater power supply according to current signal.When in ground path 11 there are when electric current or larger electric current, relay
Device disconnects, and to cut off the power supply of electric heater, electric heater is in off-position, ensure that electric heater and the peace of user
Entirely, while electric heater is disconnected with ground wire, can be conducted to other electric appliances by ground wire to avoid the leakage current of electric heater,
When can also avoid other electrical leakages, inside conduction to electric heater of the electric current by ground path 11.When ground path 11
It is interior be not present electric current or smaller current value when, electric current on electric heater, other electric appliances and user without influence, at this time at relay
In closed state, electric heater can be used normally.
In other embodiments, current transformer 12 can be substituted by voltage transformer, and relay can pass through electromagnetism
Other control switch in place such as switch, electric heater power supply is controlled as long as can realize according to the size of current on ground path 11
Disconnection.
The position that there is electric leakage hidden danger on electric heater includes the water in liner 21, electric heating tube 25 and liner 21.This
In embodiment, the voltage of the water conduction in liner 21 can be by increasing the flow electricity between 21 water inlet end of liner and water outlet
Resistance, reduces the voltage value of the water conduction of water outlet, and then protects the safety of user.Specifically, water inlet pipe 23 has anti-electricity wall knot
Structure, principle are to form certain resistance value between the water inlet end and water outlet of liner 21, pass through the principle of electric resistance partial pressure, drop
The electrical leakage voltage of the water conduction of low water outlet outflow, is reduced to safe range, to avoid electrical leakage voltage to people by electrical leakage voltage
Body damages.As shown in Fig. 2, the tube body of water inlet pipe 23 is double-layer structure, including inner tube 232 and outer tube 233,233 sets of outer tube
Outside inner tube 232, the upper end side of inner tube 232 is provided with through-hole, and outer tube 233 is the tube body of bottom opening.Water is by water inlet
After in into inner tube 232, the gap between outer tube 233 and inner tube 232 is entered by the through-hole at 232 top of inner tube, and then by outer
The opening of 233 bottom of pipe flows out.Due in liner 21 end of water inlet pipe 23 and outlet pipe 24 have certain difference in height, and into
Baffling water route is formed in water pipe 23, flow distance of the water by water inlet end to water outlet is increased, to increase the resistance of flow
Value, significantly reduces the flow voltage value of water outlet, to ensure that the safety of user.
When liner 21 and electric heating tube 25 leak electricity in the present embodiment, electrical leakage voltage is needed through the conduction of ground path 11 to ground
On line, to avoid user from getting an electric shock.As shown in Figure 1, the ground terminal of liner 21 can be set on the outer side surface of liner 21,
Electrical leakage voltage on liner 21 is directly conducted by wall surface to ground terminal, to solve the problems, such as that liner 21 leaks electricity.
The ground terminal of liner 21 can also be set to the junction of water inlet pipe 23 and/or outlet pipe 24 and liner 21.Such as
Shown in Fig. 2 and Fig. 3, by taking water inlet pipe 23 as an example, water inlet pipe 23 is provided with connecting pin 231, and the main body of connecting pin 231 is by insulating materials
It is made, insulating materials can be plastics.Tube body is connected on connecting pin 231, tube body is extend into inside liner 21.Connecting pin 231
Conductive insert is fixed with by way of melting in main body, conductive insert includes internal thread and sheet metal 234.Liner 21 1
As be made of metal material, 23 corresponding position of water inlet pipe is provided with external screw thread.When water inlet pipe 23 is assembled with liner 21, pass through
While internal thread realizes fixed with externally threaded cooperation, liner 21 is connect with the sheet metal 234 on connecting pin 231, liner 21
It is connect with ground path 11 by sheet metal 234, to solve the problems, such as that liner 21 leaks electricity.
Electric heating tube 25 is connect by flange 26 with liner 21 so that and electric heating tube 25 is extend into inside liner 21, to
Water in heating inner liner 21.To avoid the normal use of 25 effect of leakage electric heater of electric heating tube, as shown in figure 4, connection electricity
Heating tube 25 is provided with ground terminal on the flange 26 of liner 21, to realize that electric heating tube 25 is grounded.
Consider the Electrical Safety of electric heater entirety, it can leading between the ground terminal and earthing pole of liner 21 respectively
A current sensing means is individually connected on conducting wire on line and between the ground terminal and earthing pole of electric heating tube 25, is switched
The power supply that circuit judges whether to need to cut off electric heater according to the sum of the current value that two current sensing means detect.When
So, it can also be examined by a current sensing means as shown in figure 5, by the same current sensing means is connected after the two parallel connection
The leakage current value on the ground path 11 after parallel connection is surveyed, to judge whether the power supply for needing to cut off electric heater.
To reduce influence of the electric current to electric heater on ground path 11, the power supply for frequently cutting off electric heater is avoided, is connect
It is also provided with resistance on ground circuit 11.By the way that resistance is arranged on ground path 11, when can reduce a certain electrical leakage
Current value on ground path 11, to being reduced to the current value on ground path 11 to electrical equipments such as electric heaters and
It in the range of human body is without influence, and then avoids disconnecting the power supply of electric heater, ensures electric heater work free of discontinuities, avoid influencing
The normal use of user improves the usage experience of user.
Specifically, concatenated resistance can be variable resistance on ground path 11, and by the current value detected, adjustment can
The resistance value for becoming resistance, to which in safe range, the power cord of electric heater need not disconnect at this time, can tie up by current control
Hold normal use.When variable resistance is adjusted to maximum value, and the electric current on ground path 11 is still larger, then relay need and
When cut off the power cord of electric heater, to ensure that electric heater and user's is safe to use.
As shown in fig. 6, additionally providing a kind of control method of electric heater in the present embodiment, which passes through detection
The electric current on conducting wire between the liner 21 of electric heater and/or the ground terminal and earthing pole of electric heating tube 25, that is, be grounded
Electric current on road 11 cuts off the power supply of electric heater when the electric current on ground path 11 is more than default maximum leakage current value,
To avoid electric current on ground path 11 from flowing into electric heater or other electric appliances, to ensure the electric appliances such as electric heater and
The safety of user.After the dump of electric heater, the case where user can investigate electrical equipment, after solving leak current fault,
The power supply of electric heater is connected, safety coefficient is high.
The above content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (11)
1. a kind of ground structure, which is characterized in that be provided with electric current inspection on the conducting wire between electrical ground and earthing pole
Device is surveyed, the tandem tap circuit in the power supply circuit of the electric appliance, the current sensing means is for detecting ground path
(11) size of current on, and the switching circuit is controlled according to the size of current of detection and is disconnected.
2. ground structure as described in claim 1, which is characterized in that the current sensing means includes current transformer
(12)。
3. ground structure as described in claim 1, which is characterized in that the switching circuit includes relay.
4. ground structure as described in claim 1, which is characterized in that be provided with resistance on the ground path (11).
5. a kind of electric heater, including liner (21) and electric heating tube (25), which is characterized in that the liner (21) and/or institute
It states and is provided with current sensing means on the conducting wire between the ground terminal and earthing pole of electric heating tube (25), in the water heater
Tandem tap circuit in power supply circuit, the current sensing means are used to detect the size of current on ground path (11), and root
The switching circuit is controlled according to the size of current of detection to disconnect.
6. electric heater as claimed in claim 5, which is characterized in that be provided with resistance on the ground path (11).
7. electric heater as claimed in claim 6, which is characterized in that the resistance is variable resistance.
8. electric heater as claimed in claim 6, which is characterized in that the ground terminal of the liner (21) is set to its outside
On wall surface.
9. electric heater as claimed in claim 6, which is characterized in that the ground terminal of the liner (21) is set to the electricity
The water inlet pipe (23) of water heater and/or the junction of outlet pipe (24) and the liner (21).
10. electric heater as claimed in claim 6, which is characterized in that the ground terminal of the electric heating tube (25) is set to
On the flange (26) of electric heating tube (25) end.
11. a kind of control method of electric heater, which is characterized in that detect the liner (21) and/or electric heating tube of electric heater
(25) the electric current on the conducting wire between ground terminal and earthing pole, when the electric current is more than default maximum leakage current value,
Cut off the power supply of the electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810176138.5A CN108759102A (en) | 2018-03-02 | 2018-03-02 | Grounding structure, electric water heater and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810176138.5A CN108759102A (en) | 2018-03-02 | 2018-03-02 | Grounding structure, electric water heater and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108759102A true CN108759102A (en) | 2018-11-06 |
Family
ID=63980131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810176138.5A Pending CN108759102A (en) | 2018-03-02 | 2018-03-02 | Grounding structure, electric water heater and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108759102A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207384A (en) * | 2019-07-09 | 2019-09-06 | 山东龙竹新能源科技有限公司 | A kind of electric heater |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0730550U (en) * | 1993-11-12 | 1995-06-06 | 烈超 林 | Earth leakage detector |
| CN201348392Y (en) * | 2009-01-04 | 2009-11-18 | 杨智慧 | Electric heater for solar energy water heater |
| CN101650070A (en) * | 2009-08-28 | 2010-02-17 | 宁波方太厨具有限公司 | Electric water heater with ground wire electrification detection function |
| CN104132467A (en) * | 2014-08-05 | 2014-11-05 | 海信集团有限公司 | Electric shock prevention type electric water heater |
| CN105759172A (en) * | 2016-03-31 | 2016-07-13 | 山东省计量科学研究院 | Active grounding system abnormality detection device |
| CN105783273A (en) * | 2016-04-29 | 2016-07-20 | 芜湖美的厨卫电器制造有限公司 | Water heater |
| CN208075347U (en) * | 2018-03-02 | 2018-11-09 | 青岛经济技术开发区海尔热水器有限公司 | Grounding structure and electric water heater |
-
2018
- 2018-03-02 CN CN201810176138.5A patent/CN108759102A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0730550U (en) * | 1993-11-12 | 1995-06-06 | 烈超 林 | Earth leakage detector |
| CN201348392Y (en) * | 2009-01-04 | 2009-11-18 | 杨智慧 | Electric heater for solar energy water heater |
| CN101650070A (en) * | 2009-08-28 | 2010-02-17 | 宁波方太厨具有限公司 | Electric water heater with ground wire electrification detection function |
| CN104132467A (en) * | 2014-08-05 | 2014-11-05 | 海信集团有限公司 | Electric shock prevention type electric water heater |
| CN105759172A (en) * | 2016-03-31 | 2016-07-13 | 山东省计量科学研究院 | Active grounding system abnormality detection device |
| CN105783273A (en) * | 2016-04-29 | 2016-07-20 | 芜湖美的厨卫电器制造有限公司 | Water heater |
| CN208075347U (en) * | 2018-03-02 | 2018-11-09 | 青岛经济技术开发区海尔热水器有限公司 | Grounding structure and electric water heater |
Non-Patent Citations (2)
| Title |
|---|
| "《乡村电工实用技术》", 30 June 1990, pages: 203 * |
| 张强等: "《电击防护实用问答》", 30 April 2006, pages: 138 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207384A (en) * | 2019-07-09 | 2019-09-06 | 山东龙竹新能源科技有限公司 | A kind of electric heater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7986500B2 (en) | Ground fault detection in an ungrounded electrical system | |
| JPS59157983A (en) | Electric monitoring system | |
| US11381070B1 (en) | LCDI power cord circuit | |
| CN110912097B (en) | Low-voltage user side electric shock prevention monitoring and protecting method and device | |
| CN208075347U (en) | Grounding structure and electric water heater | |
| CN105337252B (en) | Earth leakage protective device with self-checking function | |
| JP5870287B2 (en) | Circuit abnormality detection device, circuit breaker | |
| CN108759102A (en) | Grounding structure, electric water heater and control method | |
| CA2909889C (en) | Medium voltage heater elements moisture detection circuit | |
| CN107799341A (en) | Switching device and method for turn-on current | |
| CN110088871A (en) | Electrical path tracer and breaker including the tracer | |
| JP6420957B2 (en) | Test apparatus and method | |
| KR101527366B1 (en) | Arc detection circuit by contact failure | |
| US20230268730A1 (en) | Leakage current detection and interruption device for power cord and related electrical connectors and electrical appliances | |
| CN110783887A (en) | Leakage protection switch | |
| CN106159932A (en) | 10kV neutral grounding by small resistance complexes | |
| CN201504086U (en) | Water heater leakage current detection circuit | |
| CN206505107U (en) | Voltage x current is double to apply power-supply system | |
| CN206452098U (en) | The protection device and electric heater of power line | |
| CN108011256B (en) | Leakage protection plug and electric water heater | |
| CN105207173A (en) | Device and method for monitoring, controlling and eliminating multipoint grounding of high-capacity transformer | |
| JP6328515B2 (en) | Grounding status confirmation device | |
| CN201504087U (en) | Water heater leakage voltage detection circuit | |
| CN109962454A (en) | Pass through the earth leakage protective device for the load that Switching Power Supply is powered | |
| CN107919655A (en) | Control circuit, control method and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |