CN211577388U - Change-over switch box for leakage current test - Google Patents
Change-over switch box for leakage current test Download PDFInfo
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- CN211577388U CN211577388U CN201922302730.8U CN201922302730U CN211577388U CN 211577388 U CN211577388 U CN 211577388U CN 201922302730 U CN201922302730 U CN 201922302730U CN 211577388 U CN211577388 U CN 211577388U
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- leakage current
- over switch
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Abstract
The utility model discloses a change over switch box is used in leakage current test, its characterized in that: a power supply N-pole disconnecting switch, a measurement network change-over switch, a power supply input socket, a tubular fuse link, a power supply output socket and a leakage current measurement socket which are mutually connected are arranged in the box; the measuring network change-over switch is a single-pole double-throw switch; the beneficial effects of the utility model are that, the utility model discloses a change over switch device of domestic and similar usage electrical apparatus leakage current detection usefulness. The utility model discloses a change over switch box is used in leakage current test for above-mentioned two kinds of relevant standard leakage current's measurement, the operation is directly perceived, simple and direct, and is practical, durable, can directly change measurement network and instrument on line, avoids the maloperation to arouse equipment to damage, and specially adapted domestic appliance or similar usage electrical apparatus's production line, laboratory, quality control sampling test etc. occasion.
Description
Technical Field
The invention relates to the technical field of safety detection of electric appliances, in particular to a change-over switch box for a leakage current test.
Background
(1) GB4706.1-2005 "safety part 1 of appliances for domestic and similar applications: general requirements chapter 13 requires: the leakage current of the appliance should not be excessive and have sufficient electrical strength at the operating temperature. Item 13.2 requires that the leakage current is measured by the circuit described in fig. 4 in IEC60990, between either pole of the power supply and the accessible metal part to which the metal foil is connected.
The measurement of a single-phase appliance is divided into the following two cases.
In the case of class II devices, definition of class II devices: the shock protection of which relies not only on basic insulation, but also provides additional safety precautions such as double insulation or enhanced insulation, which do not have provisions to protect against earth ground or installation conditions.
Examples are: common desk lamps, hair dryers, chargers and the like are II-type appliances, and power line plugs are 2-pin plugs and have no grounding pins.
If the appliance is a non-II appliance, the common appliance in the non-II appliance is a I appliance, and the definition is as follows: the protection against electric shock is not only based on basic insulation, but also comprises an additional safety protection measure, which is to connect the accessible conductive parts to the earth protection conductors in the fixed wiring of the equipment.
Examples are: common electric water heaters, washing machines, air conditioners and the like are I-type appliances, and power line plugs are 3-pin plugs and are provided with grounding pins.
(2) GB4706.1-2005 "safety part 1 of appliances for domestic and similar applications: general requirements chapter 16 requires: 16.1: the leakage current of the appliance should not be too large, …;
16.2 alternating voltage is applied between the charged part and the accessible metal part connecting the metal foil. … are provided.
In the leakage current measuring circuit of the standard clauses (1) and (2), different switching switch combinations are required in addition to different measuring networks and measuring instruments, and at present, there is no switch combination and detection device which meet the detection requirements.
Disclosure of Invention
The utility model discloses a remedy prior art not enough, provide a simple structure, convenient to use's change over switch box is used in leakage current test.
The utility model discloses a realize through following technical scheme:
the utility model discloses a change over switch box is used in leakage current test, its characterized in that: a power supply N-pole disconnecting switch, a measurement network change-over switch, a power supply input socket, a tubular fuse link, a power supply output socket and a leakage current measurement socket which are mutually connected are arranged in the box;
the measuring network change-over switch is a single-pole double-throw switch;
the L pole of the power input socket is connected with one end of the tubular fuse link, the other end of the tubular fuse link is connected with a static contact a of the measuring network change-over switch, the N pole of the power input socket is connected with one end of the power N pole cut-off switch, the other end of the power N pole cut-off switch is connected with a static contact b of the measuring network change-over switch, and the public end of the measuring network change-over switch is connected with the leakage current measuring socket; the L (namely L1) pole of the power output socket is connected with the static contact a of the measuring network switch, and the N (namely N1) pole of the power output socket is connected with the static contact b of the measuring network switch.
The power input socket is positioned at the leftmost side of the control panel of the switch box or the left side surface of the box body;
the power output socket is positioned at the rightmost side of the control panel of the change-over switch box or the right side surface of the box body;
the leakage current measuring socket is positioned at the right lower side of the control panel of the change-over switch box, and the measuring network change-over switch is positioned at the right upper side of the control panel of the change-over switch box;
the tubular fuse link is positioned at one side adjacent to the power input socket, and the power N-pole disconnecting switch is positioned at the left lower side of the control panel of the change-over switch box;
the middle part of the control panel of the switch box is carved or printed with a circuit diagram mark.
The power input end of the tested device is connected with the power output socket; the input terminal B pole (meter pen) of the measuring network and the meter or the measuring meter is inserted into the leakage current measuring socket, and the input terminal A pole (meter pen) of the measuring network and the meter or the measuring meter is connected with the easily accessible metal part of the tested device.
The input terminal B pole and the input terminal A pole of the measuring network and the instrument or the measuring instrument respectively adopt a meter pen. The measuring network and the instrument adopt a leakage current measuring instrument; the measuring instrument adopts an ammeter.
The measuring network is a circuit described by FIG. 4 in GB/T12113 (equivalent IEC 60990). On the basis of the measuring network, a voltmeter is added to measure the voltage of U2, and then the leakage current value can be obtained. In practice, this measuring network and the voltmeter are often integrated on 1 meter to form a leakage current measuring meter (leakage current tester).
In other cases, the measurement of leakage current does not require the presence of this measuring network, for example GB4706.1-2005 chapter 16, and the measuring instrument is replaced by 1 ammeter.
The beneficial effects of the utility model are that, the utility model discloses a change over switch device of domestic and similar usage electrical apparatus leakage current detection usefulness. The utility model discloses a change over switch box is used in leakage current test for above-mentioned two kinds of relevant standard leakage current's measurement, the operation is directly perceived, simple and direct, and is practical, durable, can directly change measurement network and instrument on line, avoids the maloperation to arouse equipment to damage, and specially adapted domestic appliance or similar usage electrical apparatus's production line, laboratory, quality control sampling test etc. occasion.
Drawings
The attached drawing is the structure schematic diagram of the utility model.
Fig. 1 shows leakage current through the circuit described in fig. 4 in IEC60990, i.e. the measurement network.
FIG. 2 is a circuit diagram of a diverter switch box; FIG. 3 is a layout diagram of a control panel of the diverter switch box.
In the figure, 1: a power input socket; 2: a power supply N-pole cut-off switch; 3: a measurement network switch; 4: a tubular fuse link; 5: a power output socket; 6: a device under test; measuring network and instrument; 7-B: a leakage current measuring socket. 8 change-over switch boxes, 9 control panels and 10 circuit diagram marks.
Detailed Description
The attached drawing is a concrete embodiment of the utility model.
The utility model discloses a change-over switch box for leakage current test, the box is equipped with interconnect's power N utmost point cut-off switch 2, measurement network change-over switch 3, power input socket 1, tubulose fuse-link 4, power output socket 5, leakage current measurement socket 7-B in the box;
the measuring network change-over switch 3 is a single-pole double-throw switch;
the L pole of the power input socket 1 is connected with one end of a tubular fuse link 4, the other end of the tubular fuse link 4 is connected with a stationary contact a of a measuring network change-over switch 3, the N pole of the power input socket 1 is connected with one end of a power N pole cut-off switch 2, the other end of the power N pole cut-off switch 2 is connected with a stationary contact B of the measuring network change-over switch 3, and the common end of the measuring network change-over switch 3 is connected with a leakage current measuring socket 7-B; the L (i.e., L1) pole of the power outlet socket 5 is connected to the stationary contact a of the measurement network switch 3, and the N (i.e., N1) pole of the power outlet socket 5 is connected to the stationary contact b of the measurement network switch 3.
The power input socket 1 is positioned at the leftmost side of a control panel 9 of the switch box 8 or the left side of the box body;
the power output socket 5 is positioned at the rightmost side of the control panel of the change-over switch box or the right side surface of the box body;
the leakage current measuring socket 7-B is positioned at the right lower side of the control panel of the change-over switch box, and the measuring network change-over switch 3 is positioned at the right upper side of the control panel of the change-over switch box;
the tubular fuse link 4 is positioned at one side adjacent to the power input socket 1, and the power N-pole disconnecting switch 2 is positioned at the left lower side of the control panel of the change-over switch box;
the middle of the control panel of the diverter switch box is engraved or printed with a circuit diagram identification 10.
The power input end of the tested device 6 is connected with the power output socket 5 through a power line, the input terminal B pole (meter pen) of the measuring network and the meter is inserted into the leakage current measuring socket 7-B, and the input terminal A pole (meter pen) of the measuring network and the meter is connected with the easily-accessible metal part of the tested device.
The input terminal B pole and the input terminal A pole of the measuring network and the instrument respectively adopt a meter pen. The measuring network and the instrument adopt a leakage current measuring instrument; the measuring instrument adopts an ammeter.
The power input socket 1 and the power output socket 5 provide power for the tested device, and the tubular fuse link prevents the input socket from current overload.
The utility model discloses a leakage current is measured with swift operation change over switch device can be used for GB4706.1-2005 the safe part 1 of domestic and similar usage electrical apparatus respectively: general requirements chapter 13 and chapter 16 test of leakage currents, GB4706.1-2005 "safety part 1 of household and similar appliances: general requirements the switches in the measuring circuits of fig. 1 and 2 in the standard are integrated on a control panel of a change-over switch box, and the switch is provided with a power supply N pole disconnecting switch and a measuring network change-over switch; the operation panel is provided with a circuit diagram for identifying each change-over switch; the position layout of each switch is visual and can be operated quickly; the change-over switch box is provided with a socket terminal which is convenient to be connected with a measuring network and an instrument pen; the measurement network and the instrument can be directly replaced on line (the damage of equipment caused by misoperation is avoided); the change-over switch box is additionally provided with a power input socket and a power output socket for supplying power to the tested equipment; the input socket has a tubular fuse link that protects against current overload.
When proceeding to GB4706.1-2005 "safety part 1 of appliances for domestic and similar applications: general requirements chapter 13, at operating temperature, during the leakage current test: the tested device is connected with a power output socket 5 through a power line, the input terminal B poles (meter pens) of the measuring network and the meter are inserted into a leakage current measuring socket B, and the input terminal A poles (meter pens) of the measuring network and the meter are connected with the easily-accessible metal parts of the tested device; the power supply N pole cut-off switch 2 is put in a switch-on state; before measurement, the measurement network change-over switch 3 is arranged at the middle disconnection position; the test voltage power supply of the tested device is connected through a power input socket 1; make the tested device work to steady state (if the tested device has a work controller, measure immediately before the controller is disconnected); pulling a handle of a measuring network change-over switch 3, placing the handle at a position a, and reading and recording leakage current values from a measuring network and an instrument; the handle of the measuring network changeover switch 3 is pulled and placed in the position b, and the leakage current value is read again from the measuring network and the instrument and recorded. And (6) completing the test.
When proceeding to GB4706.1-2005 "safety part 1 of appliances for domestic and similar applications: general requirements chapter 16, at leakage current test: after the tested device completes relevant processing, the tested device is connected with a power output socket 5 through a power line, the input terminal B pole (meter pen) of the measuring instrument is inserted into a leakage current measuring socket B to be connected with a live component in the device, and the input terminal A pole (meter pen) of the measuring instrument is connected with an easily-accessible metal component of the tested device; the power N pole cut-off switch 2 is in an off state; before measurement, the measurement network change-over switch 3 is arranged at the middle disconnection position; the test voltage power supply of the tested device is connected through a power input socket 1; pulling a handle of the measuring network change-over switch 3, placing the handle at the position a, reading the leakage current value from the measuring instrument and recording the leakage current value; and pulling the handle of the measuring network change-over switch 3, placing the handle at the position b, reading the leakage current value from the measuring instrument again and recording the leakage current value. And (6) completing the test.
Claims (4)
1. The utility model provides a change over switch box is used in leakage current test which characterized in that: a power supply N-pole disconnecting switch, a measurement network change-over switch, a power supply input socket, a tubular fuse link, a power supply output socket and a leakage current measurement socket which are mutually connected are arranged in the box;
the measuring network change-over switch is a single-pole double-throw switch;
the L pole of the power input socket is connected with one end of the tubular fuse link, the other end of the tubular fuse link is connected with a static contact a of the measuring network change-over switch, the N pole of the power input socket is connected with one end of the power N pole cut-off switch, the other end of the power N pole cut-off switch is connected with a static contact b of the measuring network change-over switch, and the public end of the measuring network change-over switch is connected with the leakage current measuring socket; the L1 pole of the power output socket is connected with the static contact a of the measuring network switch, and the N1 pole of the power output socket is connected with the static contact b of the measuring network switch.
2. The switcher box for leakage current test according to claim 1, wherein:
the power input socket is positioned at the leftmost side of the control panel of the switch box or the left side surface of the box body;
the power output socket is positioned at the rightmost side of the control panel of the change-over switch box or the right side surface of the box body;
the leakage current measuring socket is positioned at the right lower side of the control panel of the change-over switch box, and the measuring network change-over switch is positioned at the right upper side of the control panel of the change-over switch box;
the tubular fuse link is positioned at one side adjacent to the power input socket, and the power N-pole disconnecting switch is positioned at the left lower side of the control panel of the change-over switch box;
the middle part of the control panel of the switch box is carved or printed with a circuit diagram mark.
3. The switcher box for leakage current test according to claim 1, wherein:
the power input end of the tested device is connected with the power output socket; the input terminal B pole meter pen of the measuring network and the meter or the measuring instrument is inserted into the leakage current measuring socket, and the input terminal A pole meter pen of the measuring network and the meter or the measuring instrument is connected with the easily-accessible metal part of the tested device.
4. The switcher box for leakage current test according to claim 3, wherein: the input terminal B pole and the input terminal A pole of the measuring network and the instrument or the measuring instrument respectively adopt a meter pen; the measuring network and the instrument adopt a leakage current measuring instrument; the measuring instrument adopts an ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922302730.8U CN211577388U (en) | 2019-12-20 | 2019-12-20 | Change-over switch box for leakage current test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922302730.8U CN211577388U (en) | 2019-12-20 | 2019-12-20 | Change-over switch box for leakage current test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211577388U true CN211577388U (en) | 2020-09-25 |
Family
ID=72549139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922302730.8U Expired - Fee Related CN211577388U (en) | 2019-12-20 | 2019-12-20 | Change-over switch box for leakage current test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211577388U (en) |
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2019
- 2019-12-20 CN CN201922302730.8U patent/CN211577388U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200925 Termination date: 20211220 |