CN112327146A - Portable low pressure air switch comprehensive tester and its use method - Google Patents
Portable low pressure air switch comprehensive tester and its use method Download PDFInfo
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- CN112327146A CN112327146A CN202010630599.2A CN202010630599A CN112327146A CN 112327146 A CN112327146 A CN 112327146A CN 202010630599 A CN202010630599 A CN 202010630599A CN 112327146 A CN112327146 A CN 112327146A
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- air switch
- switch
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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Abstract
The invention discloses a portable low-voltage air switch comprehensive tester and a use method thereof, belonging to the field of electric power safety facilities and comprising a shell, wherein an epoxy resin panel is arranged in the shell, and a leakage point test circuit and an overcurrent test circuit are arranged on the panel; and a short circuit testing device is arranged in the shell, and the leakage point testing circuit, the overcurrent testing circuit and the short circuit testing device are respectively connected to the tested air switch and the 220V voltage-stabilizing power supply circuit through a live wire and a zero wire.
Description
Technical Field
The invention provides a portable low-voltage air switch comprehensive tester and a using method thereof, belonging to the field of national grid safety facilities.
Background
The existing low-voltage alternating current air switch test instruments are separated, and a special leakage tester (the leakage current exceeds 30mA, and 0.1s must reliably trip, the leakage current is less than 15mA, and must reliably not trip) and an overcurrent tester (GB10963.1 stipulates that under the reference temperature, aiming at the specification of 63A and below, the air switch does not allow action within one hour of 1.13 times of rated current, and then must act within one hour of 1.45 times of rated current); however, a special short circuit tester is not available, and the common method in the industry is that under the condition of an open switch, the end parts of insulating rods are used for fixing a live wire and a zero wire on the open load side respectively, and then the live wire and the zero wire are in direct contact to make a short circuit, so that a larger spark is generated and the situation is dangerous.
Disclosure of Invention
The invention aims to provide a portable low-voltage air switch comprehensive tester capable of overcoming the defects and a using method thereof, which can test electric leakage, overcurrent and short circuit, and avoid electric shock danger caused by manual approach by adopting a remote controller control mode.
In order to achieve the purpose, the portable low-voltage air switch comprehensive tester comprises a shell, wherein an epoxy resin panel is arranged in the shell, and a leakage point test circuit and an overcurrent test circuit are arranged on the panel; and a short circuit testing device is arranged in the shell, and the leakage point testing circuit, the overcurrent testing circuit and the short circuit testing device are respectively connected to the tested air switch and the 220V voltage-stabilizing power supply circuit through a live wire and a zero wire.
Preferably, the leakage point test circuit comprises a resistor and a remote control closing switch which are connected in series between a live wire and a ground wire, wherein the resistor and the remote control closing switch are connected in series, and the resistor and the remote control closing switch which are connected in series are connected in parallel between the resistor and the remote control closing switch which are connected in series at 22k omega; and a power-on timer A is arranged between the remote control closing switch and the zero line.
Preferably, the over-current test circuit comprises a 3.09 Ω resistor connected in series between the live wire and the zero wire, and the 3.09 Ω resistor is connected in series with a 95A alternating current contactor I; an 2.408 omega resistor is also connected in series between the live wire and the zero wire, and the 2.408 omega resistor is connected in series with a 95A alternating current contactor II; the 2.408 omega resistor and the alternating current contactor II are connected with the 3.09 omega resistor and the alternating current contactor I in parallel, the remote control switch is used for switching on and off 220V alternating current for the line loops of the alternating current contactor I and the alternating current contactor II, and the power-on timer B is connected between a live line and a zero line.
Preferably, the short circuit testing arrangement includes 12V's electro-magnet, the electro-magnet is placed in the shell outside, and the electro-magnet is connected with the flexible stick, the tip of flexible stick is inside the shell, a diameter 10mm carbon-point of cover in the epoxy pipe is installed to tip, and the carbon-point tip is the V type, be equipped with the V type groove with carbon-point tip matching in the shell, V type groove back is connected with spring one end, the spring other end is connected with the shell.
Preferably, when the electromagnet is not electrified, the distance between the carbon rod and the V-shaped groove is 8mm, and when the electromagnet is electrified, the carbon rod extends forwards by 12 mm; the carbon rod is 2.5mm2The soft copper wire is connected with a live wire; v-shaped groove of 2.5mm2The annealed copper wire is connected with a zero line.
Preferably, a primary protection and a secondary protection are respectively added between the 220V voltage-stabilized power supply and the portable low-voltage air switch comprehensive tester, and the primary protection and the secondary protection are respectively 95A air switch and 100A RTO insurance.
The use method of the portable low-pressure air switch comprehensive tester is provided, and comprises the following steps:
(1) the instrument is grounded, 63A to be tested is disconnected and connected with a wire, and a remote controller is used for connecting and disconnecting all 5 remote control switches to ensure the normal operation;
(2) the AC220V is supplied with a voltage stabilizing power supply;
(3) checking the RTO insurance and the disconnecting link at the switching-on position;
(4) closing the 95A single-phase air switch;
(5) closing 63A to be detected and opening empty;
(6) and (3) electric leakage test: remote control is carried out for 2 times;
(6) and (3) overcurrent test: remote control is carried out for 2 times;
(7) short circuit test: remote control is carried out for 1 time;
(8) the AC220V power cord was removed, the removal 63A was tried empty, the ground cord was removed, and the test was ended.
Compared with the prior art, the invention has the beneficial effects that:
1. electric leakage, overcurrent and short circuit tests are carried out in a mode of remote controller control, so that electric shock danger caused by manual approach is avoided;
2. the short circuit testing tool adopts an electromagnet to provide power, drives a V-shaped carbon rod connected with a live wire to collide with a V-shaped tungsten steel groove connected with a zero line, realizes short circuit of sparks and the zero line, realizes large-area contact of VV, avoids ablation of a tip discharge electric arc on the carbon rod and the tungsten steel, simultaneously forms high-low matching of melting points of the carbon rod and the tungsten steel (the normal use temperature of the carbon rod can reach 1450 ℃, the melting point of the tungsten steel can reach 2850 ℃ of the tungsten steel, the hard alloy has a series of excellent performances such as high hardness, wear resistance, better strength and toughness, heat resistance, corrosion resistance and the like, particularly the high hardness of the hard alloy), the instantaneous temperature is 3300 ℃, is higher than the melting points of the carbon rod and the tungsten steel, but only causes local temperature rise during short circuit, the carbon rod is easy to be lost, the price of the carbon rod.
3. In order to avoid the test power supply tripping caused by the short-circuit test, under the condition that 63A is tested to be opened in an idle state and refused to operate, primary protection and secondary protection are added, wherein the primary protection and the secondary protection are respectively 95A of idle opening and 100A of RTO (real time operating) insurance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a circuit schematic of the present invention;
wherein: 1. a housing; 2. an electromagnet; 3. a telescopic rod; 4. a carbon rod; 5. a V-shaped groove; 6. a spring.
Detailed Description
Example 1
The invention is further illustrated in the following figures 1-3, in conjunction with the accompanying drawings: the invention relates to a portable low-voltage air switch comprehensive tester which is characterized by comprising a shell 1, wherein an epoxy resin panel is arranged in the shell 1, and a leakage point test circuit and an overcurrent test circuit are arranged on the panel; a short circuit testing device is arranged in the shell 1, and the leakage point testing circuit, the overcurrent testing circuit and the short circuit testing device are respectively connected to a tested air switch and a 220V voltage-stabilizing power supply circuit through a live wire and a zero wire.
The leakage point test circuit comprises a resistor and a remote control closing switch which are connected in series between a live wire and a ground wire, wherein the resistor and the remote control closing switch are connected in series, and the resistor and the remote control closing switch which are connected in series are connected in parallel with each other between the resistor and the remote control closing switch which are connected in series at 22k omega; and a power-on timer A is arranged between the remote control closing switch and the zero line.
The over-current test circuit comprises a 3.09 omega resistor connected in series between a live wire and a zero wire, wherein the 3.09 omega resistor is connected in series with a 95A alternating current contactor I; an 2.408 omega resistor is also connected in series between the live wire and the zero wire, and the 2.408 omega resistor is connected in series with a 95A alternating current contactor II; the 2.408 omega resistor and the alternating current contactor II are connected with the 3.09 omega resistor and the alternating current contactor I in parallel, the remote control switch is used for switching on and off 220V alternating current for the line loops of the alternating current contactor I and the alternating current contactor II, and the power-on timer B is connected between a live line and a zero line.
Short circuit testing arrangement includes 12V's electro-magnet 2, electro-magnet 2 is placed in the 1 outside of shell, and electro-magnet 2 is connected with flexible stick 3, the tip of flexible stick 3 is inside 1 shell, a diameter 10mm carbon-point 4 of cover in the epoxy pipe is installed to tip, and 4 tip of carbon-point are the V type, be equipped with the V type groove 5 that matches with 4 tip of carbon-point in the shell 1, 5 backs in the V type groove are connected with 6 one end of spring, 6 other ends of spring are connected with shell 1.
When the electromagnet 2 is not electrified, the distance between the carbon rod 4 and the V-shaped groove 5 is 8mm, and when the electromagnet is electrified, the carbon rod extends forwards by 12 mm; 2.5mm for carbon rod 42The soft copper wire is connected with a live wire; v-shaped groove of 2.5mm2The annealed copper wire is connected with a zero line.
A primary protection and a secondary protection are respectively added between the 220V voltage-stabilized power supply and the portable low-voltage air switch comprehensive tester, and the primary protection and the secondary protection are respectively 95A air switch and 100A RTO insurance.
The use method of the portable low-pressure air switch comprehensive tester comprises the following steps:
1) the instrument is grounded, 63A to be tested is disconnected and connected with a wire, and a remote controller is used for connecting and disconnecting all 5 remote control switches to ensure the normal operation;
(2) the AC220V is supplied with a voltage stabilizing power supply;
(3) checking the RTO insurance and the disconnecting link at the switching-on position;
(4) closing the 95A single-phase air switch;
(5) closing 63A to be detected and opening empty;
(6) and (3) electric leakage test: remote control is carried out for 2 times;
(6) and (3) overcurrent test: remote control is carried out for 2 times;
(7) short circuit test: remote control is carried out for 1 time;
(8) the AC220V power cord was removed, the removal 63A was tried empty, the ground cord was removed, and the test was ended.
The portable low-voltage air switch comprehensive tester is developed aiming at the current mainstream 63A household air switch, one tester can realize 3 tests of electric leakage, overcurrent and short circuit, the whole tester is packaged in an external aluminum alloy shell, a cover is opened to be visible, all elements such as a switch, a resistor and the like are installed on an epoxy resin panel, and wiring is arranged in a box body.
(1) And (3) electric leakage test: in order to test that the leakage current exceeds 30mA, 0.1s must be reliably tripped; a 6.3k omega resistor is connected in series between a live wire and the ground, under the condition that the voltage is 220V (provided by a voltage stabilizing source), a DC12V power supply remote control AC220V switch is switched on, the grounding current (leakage current) is 35mA, the idle switch of 63A is reliably tripped within 0.1s, and the action time is recorded by a power-on timer A; in order to test that the leakage current is less than 15mA and the leakage current must be reliably prevented from tripping, a 22k omega resistor is connected in series between a live wire and the ground, the voltage is 220V (provided by a voltage stabilizing source), a DC12V power supply remote control AC220V switch is switched on, the grounding current (leakage current) is 10mA, the idle switch of 63A should be reliably prevented from tripping, and if the idle switch is in misoperation, the action time is recorded by a power-on timer A.
(2) And (3) overcurrent test: in order to test the impermissible action test (overcurrent) within one hour of 1.13 times rated current, 3.090 omega resistors are connected in series between a live wire and a zero wire, a 95A alternating current contactor is connected in series, a DC12V power supply remote control AC220V switch is used for switching 220V alternating current for a line loop of the alternating current contactor, the test needs to last more than 3600 seconds (recorded by a power-on timer B), and if the switch is qualified, the switch should not trip within 3600 seconds; in order to test the necessary action test (overcurrent) within one hour of 1.45 times rated current, 2.408 omega resistors are connected in series between a live wire and a zero wire, a 95A alternating current contactor is connected in series, a DC12V power supply remote control AC220V switch is used for switching 220V alternating current in a circuit of the alternating current contactor, the test needs to last 3600 seconds, and if the quality of the switch is qualified, the trip should be carried out within 3600 seconds;
(3) the short circuit test is carried out in a box made of epoxy resin, a 12V electromagnet 2 is placed on the outer side of the box, the end part of a telescopic rod 3 is arranged in the box, a carbon rod 4 with the diameter of 10mm sleeved in an epoxy tube is installed at the end part, the end part is V-shaped, when the electromagnet 2 is not electrified, the distance between the carbon rod 4 and a V-shaped groove 5 is 8mm, the carbon rod extends forwards by 12mm when the electromagnet is electrified, and 2 springs 6 are additionally arranged at the rear part of the V-shaped groove 5 in order to buffer impact force. 2.5mm for carbon rod 42The soft copper wire is connected with a live wire; 2.5mm for W-steel V-shaped groove 52The annealed copper wire is connected with a zero line. The upper cover of the box body can be opened, so that the carbon rod 4 can be conveniently replaced and carbon powder ablated by short-circuit electric arc can be conveniently wiped.
Claims (7)
1. A portable low-voltage air switch comprehensive tester is characterized by comprising a shell (1), wherein an epoxy resin panel is arranged in the shell (1), and a leakage point test circuit and an overcurrent test circuit are arranged on the panel; the short circuit testing device is arranged in the shell (1), and the leakage point testing circuit, the over-current testing circuit and the short circuit testing device are connected to the tested air switch and the 220V voltage-stabilizing power supply circuit through a live wire and a zero wire respectively.
2. The portable low-voltage air switch comprehensive tester as claimed in claim 1, wherein the leakage point test circuit comprises a resistor and a remote-control switch-on switch which are connected in series by 6.3k Ω between the live wire and the ground wire, and a resistor and a remote-control switch-on switch which are connected in series by 22k Ω are connected in parallel between the resistor and the remote-control switch-on switch which are connected in series by 6.3k Ω; and a power-on timer A is arranged between the remote control closing switch and the zero line.
3. The portable low-voltage air switch comprehensive tester as claimed in claim 1, wherein the over-current test circuit comprises a 3.09 Ω resistor connected in series between the live wire and the neutral wire, the 3.09 Ω resistor being connected in series with a 95A ac contactor I; an 2.408 omega resistor is also connected in series between the live wire and the zero wire, and the 2.408 omega resistor is connected in series with a 95A alternating current contactor II; the 2.408 omega resistor and the alternating current contactor II are connected with the 3.09 omega resistor and the alternating current contactor I in parallel, the remote control switch is used for switching on and off 220V alternating current for the line loops of the alternating current contactor I and the alternating current contactor II, and the power-on timer B is connected between a live line and a zero line.
4. The portable low-pressure air switch comprehensive tester is characterized in that the short circuit testing device comprises a 12V electromagnet (2), the electromagnet (2) is placed on the outer side of the shell (1), the electromagnet (2) is connected with a telescopic rod (3), the end portion of the telescopic rod (3) is arranged inside the shell (1), a carbon rod (4) which is sleeved in an epoxy tube and has the diameter of 10mm is installed at one end of the end portion, the end portion of the carbon rod (4) is V-shaped, a V-shaped groove (5) which is matched with the end portion of the carbon rod (4) is formed in the shell (1), the back portion of the V-shaped groove (5) is connected with one end of a spring (6), and the other end of the spring (6) is connected with the shell (1).
5. The portable low-pressure air switch comprehensive tester as claimed in claim 4, wherein when the electromagnet (2) is not electrified, the distance between the carbon rod (4) and the V-shaped groove (5) is 8mm, and when the electromagnet is electrified, the carbon rod extends forwards by 12 mm; the carbon rod (4) is 2.5mm2The soft copper wire is connected with a live wire; v-shaped groove of 2.5mm2The annealed copper wire is connected with a zero line.
6. The portable low-voltage air switch comprehensive tester as claimed in claim 1, wherein a primary protection and a secondary protection are respectively added between the 220V stabilized power supply and the portable low-voltage air switch comprehensive tester, and the primary protection and the secondary protection are respectively 95A air switch and 100A RTO insurance.
7. The use method of the portable low-pressure air switch comprehensive tester according to the claims 1 to 6, characterized by comprising the following steps:
1) the instrument is grounded, 63A to be tested is disconnected and connected with a wire, and a remote controller is used for connecting and disconnecting all 5 remote control switches to ensure the normal operation;
(2) the AC220V is supplied with a voltage stabilizing power supply;
(3) checking the RTO insurance and the disconnecting link at the switching-on position;
(4) closing the 95A single-phase air switch;
(5) closing 63A to be detected and opening empty;
(6) and (3) electric leakage test: remote control is carried out for 2 times;
(6) and (3) overcurrent test: remote control is carried out for 2 times;
(7) short circuit test: remote control is carried out for 1 time;
(8) the AC220V power cord was removed, the removal 63A was tried empty, the ground cord was removed, and the test was ended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010630599.2A CN112327146A (en) | 2020-07-03 | 2020-07-03 | Portable low pressure air switch comprehensive tester and its use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010630599.2A CN112327146A (en) | 2020-07-03 | 2020-07-03 | Portable low pressure air switch comprehensive tester and its use method |
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| Publication Number | Publication Date |
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| CN112327146A true CN112327146A (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010630599.2A Pending CN112327146A (en) | 2020-07-03 | 2020-07-03 | Portable low pressure air switch comprehensive tester and its use method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562984U (en) * | 2012-04-16 | 2012-11-28 | 安徽省电力公司芜湖供电公司 | Parallel connected low-pressure air switch testing device |
| CN205120861U (en) * | 2015-10-27 | 2016-03-30 | 山东公信安全科技有限公司 | Colliery is low voltage electric equipment comprehensive properties tester in pit |
| CN208334579U (en) * | 2018-05-02 | 2019-01-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable air-switch RTA reliability test assembly |
| CN208847828U (en) * | 2018-08-16 | 2019-05-10 | 湖南华鑫电子科技有限公司 | A kind of power supply product tester |
| CN213023463U (en) * | 2020-07-03 | 2021-04-20 | 国网山东省电力公司淄博供电公司 | Portable low-voltage air switch comprehensive tester |
-
2020
- 2020-07-03 CN CN202010630599.2A patent/CN112327146A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562984U (en) * | 2012-04-16 | 2012-11-28 | 安徽省电力公司芜湖供电公司 | Parallel connected low-pressure air switch testing device |
| CN205120861U (en) * | 2015-10-27 | 2016-03-30 | 山东公信安全科技有限公司 | Colliery is low voltage electric equipment comprehensive properties tester in pit |
| CN208334579U (en) * | 2018-05-02 | 2019-01-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable air-switch RTA reliability test assembly |
| CN208847828U (en) * | 2018-08-16 | 2019-05-10 | 湖南华鑫电子科技有限公司 | A kind of power supply product tester |
| CN213023463U (en) * | 2020-07-03 | 2021-04-20 | 国网山东省电力公司淄博供电公司 | Portable low-voltage air switch comprehensive tester |
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