CN203101483U - Auxiliary device for measuring leakage current - Google Patents
Auxiliary device for measuring leakage current Download PDFInfo
- Publication number
- CN203101483U CN203101483U CN 201320035057 CN201320035057U CN203101483U CN 203101483 U CN203101483 U CN 203101483U CN 201320035057 CN201320035057 CN 201320035057 CN 201320035057 U CN201320035057 U CN 201320035057U CN 203101483 U CN203101483 U CN 203101483U
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- over switch
- change
- phase line
- zero line
- line
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model relates to an auxiliary device for measuring leakage current, and solves a problem of high cost. The technical key points are that a first fixed contact and a second fixed contact of a first cold state and hot state switching switch are both connected with a first movable contact of a first phase line zero line switching switch; a first fixed contact of the first phase line zero line switching switch is connected with a power zero line; a second fixed contact of the first phase line zero line switching switch is connected with a power phase line; a first fixed contact of a second cold state and hot state switching switch is connected with a movable contact of a second phase line zero line switching switch; a second fixed contact of the second cold state and hot state switching switch is connected with a movable contact of the first phase line zero line switching switch; a first fixed contact of the second phase line zero line switching switch is connected with the power phase line; the second fixed contact of the second phase line zero line switching switch is connected with the power zero line; a first testing end is connected with an insulation body; and a second testing end serves as a free end. The auxiliary device for measuring leakage current helps to save cost.
Description
Technical field
The utility model relates to a kind of current sensing means, particularly a kind of servicing unit of measuring leakage current.
Background technology
Leakage current (Leakage Current) is also referred to as pickup current (Touch Current).In other words, but when a people or animal touch the contact portion of equipment, flow through the electric current of human body or animal body.If pickup current is excessive, the operator will get shocked so, may cause serious injury.In order fully to guarantee the safe in utilization of consumer, clearly regulation is all arranged in all kinds of electric equipment products safety standards, require the leakage current of electric equipment products is measured, and the specifying measurement value will be in the limit value of regulation.
Because leakage current comprises " leakage current under the working temperature " and " cold conditions leakage current " in the test event that requires in the GB4706.1, wherein, require measured device to carry out current detecting in working order down during the measurement of the leakage current under the working temperature, the measurement of generally then measured device can being connected with the reometer that detects usefulness of cold conditions leakage current, the measuring method difference that both require, the circuit connecting difference, so present laboratory must respectively be equipped with the corresponding utility appliance of a cover separately and finish the leakage current detection, all negative effect can be arranged for laboratory cost and work efficiency.
The utility model content
The purpose of this utility model is to solve prior art need respectively be equipped with the detection that the corresponding utility appliance of a cover is come corresponding different conditions leakage current, the problem that negative effect all can be arranged for laboratory cost and work efficiency, a kind of detection that can reach corresponding different conditions leakage current by simple switching is provided, save the laboratory cost, the servicing unit of the measurement leakage current of increasing work efficiency.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of servicing unit of measuring leakage current, be used for the measurement of the leakage current of measured device, comprise socket, measured device is electrically connected with socket, comprise the hot change-over switch of first cold conditions, the hot change-over switch of second cold conditions, the first phase line zero line change-over switch, second phase line zero line change-over switch and the reometer, first socket of described socket is connected with the moving contact of the hot change-over switch of first cold conditions, first stationary contact of the hot change-over switch of first cold conditions all is connected with first moving contact of the first phase line zero line change-over switch with second stationary contact, first stationary contact of the first phase line zero line change-over switch is connected with zero-power line, and second stationary contact of the first phase line zero line change-over switch is connected with the power supply phase line; Second socket of described socket is connected with the moving contact of the hot change-over switch of second cold conditions, first stationary contact of the hot change-over switch of second cold conditions is connected with the moving contact of the second phase line zero line change-over switch, second stationary contact of the hot change-over switch of second cold conditions is connected with the moving contact of the first phase line zero line change-over switch, first stationary contact of the second phase line zero line change-over switch is connected with the power supply phase line, and second stationary contact of the second phase line zero line change-over switch is connected with zero-power line; First test lead of described reometer is connected with the insulator of measured device, and second test lead of described reometer is the free end that is connected with power supply phase line or zero line according to user's selection.When needing test " leakage current under the working temperature ", switch to hot cold conditions change-over switch hot, measured device is a duty, the housing contacts that reometer one end and measured device should insulate, the other end is connected with phase line of power or zero line, measured device carries out current detecting in working order down, and switching phase line zero line change-over switch can be measured the leakage current between phase line or zero line and the shell; Accordingly when needs tests " cold conditions leakage current ", hot cold conditions change-over switch is switched to cold conditions, measured device is not worked, the housing contacts that reometer one end and measured device should insulate, the other end is connected with phase line of power or zero line, measured device is connected with the reometer that detects usefulness, switching phase line zero line change-over switch can be measured the leakage current between phase line or zero line and the shell, the measurement utility appliance that the utility model is integrated " leakage current under the working temperature " and " cold conditions leakage current ", can reach the detection of corresponding different conditions leakage current by simple switching, save the laboratory cost, increase work efficiency, simplify the use of equipment, made things convenient for equipment daily management and maintenance.
As preferably, first socket of described socket directly is connected with the moving contact of the first phase line zero line change-over switch.Be provided with like this, can save a change-over switch, saved cost.
As preferably, the hot change-over switch of described first cold conditions, the hot change-over switch of second cold conditions, the first phase line zero line change-over switch and the second phase line zero line change-over switch are single-pole double-throw switch (SPDT).Single-pole double-throw switch (SPDT) is as mechanical switch spare, and manually control is convenient, opens and closes visually, and circuit structure is high-visible.
As preferably, the hot change-over switch interlock of the hot change-over switch of described first cold conditions and second cold conditions, the described first phase line zero line change-over switch links with the second phase line zero line change-over switch.Switch gearing can be saved the operational motion between the switch switching, and simultaneously, combined operation has prevented that also the short-circuit conditions that the circuit maloperation causes from taking place.
As preferably, the servicing unit of described measurement leakage current also comprises the ammeter change-over switch, the moving contact of described ammeter change-over switch is connected with second test lead of reometer, first stationary contact of described ammeter change-over switch is connected with the power supply phase line, and second stationary contact of described ammeter change-over switch is connected with zero-power line.The introducing of ammeter change-over switch, it is more high-visible to have helped the user to carry out the selection of phase line zero line, switches also convenient.
As preferably, described ammeter change-over switch is a single-pole double-throw switch (SPDT).
The beneficial effects of the utility model are: the measurement utility appliance that the utility model is integrated " leakage current under the working temperature " and " cold conditions leakage current ", can reach the detection of corresponding different conditions leakage current by simple switching, save the laboratory cost, increase work efficiency, simplify the use of equipment, made things convenient for equipment daily management and maintenance.
Description of drawings
Fig. 1 is a kind of circuit theory synoptic diagram of the present utility model.
Among the figure: 1, socket, 2, measured device.
Embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1:
A kind of servicing unit (referring to accompanying drawing 1) of measuring leakage current, be used for the measurement of the leakage current of measured device 2, comprise socket 1, measured device is electrically connected with socket, comprise the hot change-over switch of first cold conditions, the hot change-over switch of second cold conditions, the first phase line zero line change-over switch, second phase line zero line change-over switch and the reometer, first socket of described socket is connected with the moving contact of the hot change-over switch of first cold conditions, first stationary contact of the hot change-over switch of first cold conditions all is connected with first moving contact of the first phase line zero line change-over switch with second stationary contact, first stationary contact of the first phase line zero line change-over switch is connected with zero-power line, and second stationary contact of the first phase line zero line change-over switch is connected with the power supply phase line; Second socket of described socket is connected with the moving contact of the hot change-over switch of second cold conditions, first stationary contact of the hot change-over switch of second cold conditions is connected with the moving contact of the second phase line zero line change-over switch, second stationary contact of the hot change-over switch of second cold conditions is connected with the moving contact of the first phase line zero line change-over switch, first stationary contact of the second phase line zero line change-over switch is connected with the power supply phase line, and second stationary contact of the second phase line zero line change-over switch is connected with zero-power line; First test lead of described reometer is connected with the insulator of measured device, and second test lead of described reometer is the free end that is connected with power supply phase line or zero line according to user's selection.The hot change-over switch of described first cold conditions, the hot change-over switch of second cold conditions, the first phase line zero line change-over switch and the second phase line zero line change-over switch are single-pole double-throw switch (SPDT).The hot change-over switch of described first cold conditions and second cold conditions hot change-over switch interlock, the described first phase line zero line change-over switch and the interlock of the second phase line zero line change-over switch.The servicing unit of described measurement leakage current also comprises the ammeter change-over switch, the moving contact of described ammeter change-over switch is connected with second test lead of reometer, first stationary contact of described ammeter change-over switch is connected with the power supply phase line, and second stationary contact of described ammeter change-over switch is connected with zero-power line.Described ammeter change-over switch is a single-pole double-throw switch (SPDT).
When present embodiment needs test " leakage current under the working temperature ", switch to hot cold conditions change-over switch hot, promptly the hot change-over switch of first cold conditions all is connected with first stationary contact with moving contact in the hot change-over switch of second cold conditions, at this moment, measured device is a duty, the housing contacts that reometer one end and measured device should insulate, the other end is connected with phase line of power or zero line, measured device carries out current detecting in working order down, switches the first phase line zero line change-over switch and the second phase line zero line change-over switch this moment and can measure leakage current under the working temperature between phase line or zero line and the shell; Accordingly when needs tests " cold conditions leakage current ", hot cold conditions change-over switch is switched to cold conditions, promptly the hot change-over switch of first cold conditions all is connected with second stationary contact with moving contact in the hot change-over switch of second cold conditions, measured device only is connected with phase line of power, do not constitute the loop, measured device is not worked, the housing contacts that reometer one end and measured device should insulate, the other end is connected with the zero line of power supply, measured device is connected with the reometer that detects usefulness and is carried out the cold conditions leakage current testing first time, switch the first phase line zero line change-over switch and the second phase line zero line change-over switch then, make measured device only be connected with the zero line of power supply, simultaneously, change the ammeter change-over switch, make the housing contacts that reometer one end and measured device should insulate, the other end is connected with phase line of power, carry out the cold conditions leakage current testing second time, can measure cold conditions leakage current between phase line or zero line and the measured device insulator by this quadrat method.The measurement utility appliance that the utility model is integrated " leakage current under the working temperature " and " cold conditions leakage current ", can reach the detection of corresponding different conditions leakage current by simple switching, save the laboratory cost, increase work efficiency, simplify the use of equipment, made things convenient for equipment daily management and maintenance.
Embodiment 2:
Present embodiment is substantially the same manner as Example 1, and difference is that first socket of the described socket in the present embodiment directly is connected with the moving contact of the first phase line zero line change-over switch.Thereby saved the hot change-over switch of first cold conditions.
Above-described embodiment is a kind of preferable scheme of the present utility model, is not that the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (6)
1. servicing unit of measuring leakage current, be used for the measurement of the leakage current of measured device, comprise socket, measured device is electrically connected with socket, it is characterized in that: comprise the hot change-over switch of first cold conditions, the hot change-over switch of second cold conditions, the first phase line zero line change-over switch, second phase line zero line change-over switch and the reometer, first socket of described socket is connected with the moving contact of the hot change-over switch of first cold conditions, first stationary contact of the hot change-over switch of first cold conditions all is connected with first moving contact of the first phase line zero line change-over switch with second stationary contact, first stationary contact of the first phase line zero line change-over switch is connected with zero-power line, and second stationary contact of the first phase line zero line change-over switch is connected with the power supply phase line; Second socket of described socket is connected with the moving contact of the hot change-over switch of second cold conditions, first stationary contact of the hot change-over switch of second cold conditions is connected with the moving contact of the second phase line zero line change-over switch, second stationary contact of the hot change-over switch of second cold conditions is connected with the moving contact of the first phase line zero line change-over switch, first stationary contact of the second phase line zero line change-over switch is connected with the power supply phase line, and second stationary contact of the second phase line zero line change-over switch is connected with zero-power line; First test lead of described reometer is connected with the insulator of measured device, and second test lead of described reometer is the free end that is connected with power supply phase line or zero line according to user's selection.
2. the servicing unit of measurement leakage current according to claim 1 is characterized in that: first socket of described socket directly is connected with the moving contact of the first phase line zero line change-over switch.
3. the servicing unit of measurement leakage current according to claim 1 is characterized in that: the hot change-over switch of described first cold conditions, the hot change-over switch of second cold conditions, the first phase line zero line change-over switch and the second phase line zero line change-over switch are single-pole double-throw switch (SPDT).
4. the servicing unit of measurement leakage current according to claim 3 is characterized in that: the hot change-over switch of described first cold conditions and second cold conditions hot change-over switch interlock, the described first phase line zero line change-over switch and the interlock of the second phase line zero line change-over switch.
5. according to claim 1 or 2 or the servicing unit of 3 or 4 described measurement leakage currents, it is characterized in that: the servicing unit of described measurement leakage current also comprises the ammeter change-over switch, the moving contact of described ammeter change-over switch is connected with second test lead of reometer, first stationary contact of described ammeter change-over switch is connected with the power supply phase line, and second stationary contact of described ammeter change-over switch is connected with zero-power line.
6. the servicing unit of measurement leakage current according to claim 5 is characterized in that: described ammeter change-over switch is a single-pole double-throw switch (SPDT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320035057 CN203101483U (en) | 2013-01-23 | 2013-01-23 | Auxiliary device for measuring leakage current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320035057 CN203101483U (en) | 2013-01-23 | 2013-01-23 | Auxiliary device for measuring leakage current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101483U true CN203101483U (en) | 2013-07-31 |
Family
ID=48852873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320035057 Expired - Lifetime CN203101483U (en) | 2013-01-23 | 2013-01-23 | Auxiliary device for measuring leakage current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203101483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
| CN111602602A (en) * | 2020-05-21 | 2020-09-01 | 昭苏县西域马业有限责任公司 | Water tank device for providing warm water for animals in winter and control method |
-
2013
- 2013-01-23 CN CN 201320035057 patent/CN203101483U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
| CN111602602A (en) * | 2020-05-21 | 2020-09-01 | 昭苏县西域马业有限责任公司 | Water tank device for providing warm water for animals in winter and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |
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| CX01 | Expiry of patent term |