CN203012082U - Insulation detector - Google Patents
Insulation detector Download PDFInfo
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- CN203012082U CN203012082U CN 201320015831 CN201320015831U CN203012082U CN 203012082 U CN203012082 U CN 203012082U CN 201320015831 CN201320015831 CN 201320015831 CN 201320015831 U CN201320015831 U CN 201320015831U CN 203012082 U CN203012082 U CN 203012082U
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Abstract
The utility model discloses an insulation detector, which detects a control power circuit through a single-phase full-wave rectification circuit, and can detect insulation of a low-voltage control power circuit and an overall control loop through two single-phase full-wave rectification circuits. The insulation detector comprises a power supply unit, a 220V alternating current access circuit protection unit, a relay unit, a control panel unit, a circuit board unit, a first terminal and a second terminal, wherein the power supply unit is connected to 380V alternating current, and the 380V alternating current is converted into 220V alternating current through an internal transformer; the circuit protection unit comprises a first fuse and a second fuse; the relay unit comprises a first direct current relay, a second direct current relay and an alternating current relay; the control panel unit comprises a voltmeter, an alarm removing button, a first loop L11 test button, a second loop L12 test button, a power indicator light, a fault indicator light of the first loop L11, a fault indicator light of the second loop L12 and a speaker; and the circuit board unit is welded by a first diode, a second diode, a third diode and a fourth diode. The insulation detector does not damage a line of the control loop and components thereof, and can check insulation of the line strictly, accurately and timely; and the insulation detector is simple in design, convenient to implement and low in price, and can improve the work efficiency.
Description
Technical field
The utility model relates to a kind of inspection apparatus, relates in particular to a kind of insulation tester.
Background technology
Due to the development of industrial and mineral industry, the ratio increasing year by year of cable line causes capacitive earth current to increase.If neutral point adopts earth-free mode, when singlephase earth fault occuring, the superpotential multiple increases, and phase fault easily occurs and damage electric equipment.If neutral ground; when electric system is broken down (such as electrical network partial short circuit or open circuit etc.); the distribution system neutral point will produce skew; this moment, neutral resistance was forced ground connection with the output distribution system neutral; and limit its fault current; make electric system detect if having time, diagnose, protect and switch, thus the damage of having avoided circuit or equipment to suffer.Neutral resistance electric current when the normal operation of power transmission and distribution system is very little, and when electric system was broken down, the electric current that flows through neutral resistance was very large, and the time is very short, and it is generally used for short time duty.The neutral resistance design is according to ANSI/IEEE32.1972 and IEC625 and relevant criterion, and its effect is applicable too for the detection of control loop.The insulation of electrical equipment if mix impurity, seriously make moist or aging etc., all can affect the normal operation of electrical equipment, even causes substantial equipment or personal injury.The standard of insulation quality, the mensuration three aspects: by the inspection of insulation resistance, withstand voltage test, dielectric loss angle judges usually.
In realizing process of the present utility model, find to exist at least in prior art following shortcoming and defect:
Below all be only applicable to the insulation inspection of high-tension cable or low pressure main loop cabling, and to the control loop of low-pressure system, because the limit resistance is very little, arbitrary checkout facility causes damage for the circuit of control loop and device are all as easy as rolling off a log.
The utility model content
The utility model provides a kind of insulation tester, has realized having avoided the damage of circuit to controlling the inspection of mains isolation and control loop insulation, sees for details hereinafter and describes:
A kind of insulation tester comprises: power supply unit, and the alternating current of described power supply unit access 380V, the transformer by inside is converted to the 220V alternating current; 220V alternating current place in circuit protected location, relay unit, control panel unit, circuit board unit, the first terminals and the second terminals,
Described circuit protection unit comprises: the first fuse and the second fuse are realized the protection to circuit;
Described relay unit comprises: the first DC relay, the second DC relay and AC relay;
Described control panel unit comprises: voltage table, alarm release button, the first loop L11 testing button, second servo loop L12 testing button, power light, the malfunction indicator lamp of the first loop L11, malfunction indicator lamp and the loudspeaker of second servo loop L12;
Described circuit board unit is formed by the first diode, the second diode, the 3rd diode and the 4th welding diode;
Described the first diode, described the second diode and described the first DC relay have consisted of the first single-phase full-wave rectifer circuit; Described the 3rd diode, described the 4th diode and described the second DC relay have consisted of the second single-phase full-wave rectifer circuit; Described the first terminals and described the second tested power supply of wiring termination or tested control electric power loop;
The normally-open normally-close dot interlace series connection of described the first loop L11 testing button and described second servo loop L12 testing button realizes the switching inspection of two control loop interlockings and power supply;
The normally-open normally-close point of described AC relay consisted of the warning of fault jingle bell and removes warning circuit with the normal battle of described alarm release button, described the first DC relay and described the second DC relay;
Described power light and described voltage table form power indication signal.
Also be provided with the shell of iron sheet case in the outside of described insulation tester, the side of shell is provided with the ventilation cooling vent.
Last layer at described transformer arranges described relay unit and described circuit board unit, isolates with iron plate.
The beneficial effect of the technical scheme that the utility model provides is: detect one by a single-phase full-wave rectifer circuit and control power circuit, can detect low-voltage control power circuit and the insulation of whole control loop by two single-phase full-wave rectifer circuits; The utility model can not cause damage to circuit and the device thereof of control loop, can accomplish strictly the insulation of circuit, accurately and timely check; Simplicity of design, realization convenience, cheap can improve the efficient of work.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Figure (a) is the single-phase full-wave rectifer circuit schematic diagram;
Figure (b) is VD1 conducting fundamental diagram;
Figure (c) is VD2 conducting fundamental diagram;
Fig. 2 is a kind of circuit theory diagrams of insulation tester;
Fig. 3 is pictorial diagram.
In accompanying drawing, the list of parts of each label representative is as follows:
FU1: the first fuse; FU2: the second fuse;
KA1: the first DC relay; KA2: the second DC relay;
KA4: AC relay; QM: chopper switch;
PV: voltage table; SB1: alarm release button;
SB2: the first loop L11 testing button; SB3: second servo loop L12 testing button;
HL1: power light; HL2: the malfunction indicator lamp of the first loop L11;
HL3: the malfunction indicator lamp of second servo loop L12; HA1: loudspeaker;
VD1: the first diode; VD2: the second diode;
VD3: the 3rd diode; VD4: the 4th diode;
L11: the first terminals; L12: the second terminals;
9: transformer frequency response L1, L2; 10: the ventilation Cooling Holes.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the below is described in further detail the utility model embodiment.
In order to realize avoiding the damage of circuit to controlling the inspection of mains isolation and control loop insulation, the utility model embodiment provides a kind of insulation tester, sees for details hereinafter to describe:
Referring to Fig. 1 (a), design concept Main Basis single-phase full-wave rectifer circuit of the present utility model (a).Its principle of work: when voltage V1 is positive half cycle, as shown in figure (b), VD1 conducting, VD2 cut-off, R0 two ends output voltage V 0=V2a; When V1 is negative half period, as shown in figure (c), VD1 cut-off, VD2 conducting, R0 two ends output voltage V 0=V2b.
A kind of insulation tester referring to Fig. 2, comprising: power supply unit, and the alternating current of power supply unit access 380V, the transformer TC1 by inside is converted to the 220V alternating current; 220V alternating current place in circuit protected location, relay unit, control panel unit, circuit board unit, the first terminals L11 and the second terminals L12,
Circuit protection unit comprises: the first fuse FU1 and the second fuse FU2 realize the protection to circuit;
Relay unit comprises: the first DC relay KA1, the second DC relay KA2 and AC relay KA4;
The control panel unit comprises: malfunction indicator lamp HL3 and the horn in H A1 of malfunction indicator lamp HL2, the second servo loop L12 of voltage table PV, alarm release button SB1, the first loop L11 testing button SB2, second servo loop L12 testing button SB3, power light HL1, the first loop L11;
Circuit board unit is welded by the first diode VD1, the second diode VD2, the 3rd diode VD3 and the 4th diode VD4;
The first diode VD1, the second diode VD2 and the first DC relay KA1 have consisted of the first single-phase full-wave rectifer circuit; The 3rd diode VD3, the 4th diode VD4 and the second DC relay KA2 have consisted of the second single-phase full-wave rectifer circuit; The first terminals L11 and the second terminals L12 connect tested power supply or tested control electric power loop;
The normally-open normally-close dot interlace series connection of the first loop L11 testing button SB2 and second servo loop L12 testing button SB3 realizes the switching inspection of two control loop interlockings and power supply;
The normally-open normally-close point of AC relay KA4 consisted of the warning of fault jingle bell and removes warning circuit with the normal battle of the first loop L11 testing button SB1, the first DC relay KA1 and the second DC relay KA2;
Power light HL1 and voltage table PV form power indication signal.
The below is to check that tested control electric power loop is as example explanation principle of work of the present utility model: in the first terminals L11 and the tested control electric power loop of the second terminals L12 access.After connecting 380 volts of power supplys of interchange, it is AC 220 V that transformer TC1 will access lower voltage, and this moment, voltage table PV was shown as 220 volts, and power light HL1 is bright; Press the test loop that the first loop L11 testing button SB2 connects the first terminals L11, this moment, the second DC relay KA2 got electricly, often made war closedly, and the bright fault alarm bell of the malfunction indicator lamp of the first terminals L11 sounds; Unclamp the first loop L11 testing button SB2, the second DC relay KA2 outage, the normal battle disconnects, AC relay KA4 dead electricity, often making war, it is normally closed closed to disconnect.Whole test loop recovers normal condition, and the line test of the first terminals L11 is complete, the good non-fault of whole line insulation.If after unclamping the first loop L11 testing button SB2, the second DC relay KA2 does not cut off the power supply yet, illustrate that the first terminals L11 line insulation has problem, need to process immediately.At this moment can press (crawl) alarm release button SB1, AC relay KA4 gets electric, and the closed normally closed point of often making war disconnects, and this moment, the alarm bell power alarm was temporarily removed, and tested after finding out reason again.
Wherein, check that the process of the second terminals L12 line attachment is identical with the first terminals L11, repeat no more here.
During specific implementation, according to the needs in practical application, device is selected, for example: transformer TC1 selects 3KVA, and switch is chosen as the leakage guarantor switch of 6 amperes; The first fuse FU1 and the second fuse FU2 select 6 peaces; Relay unit is by 110 volts of two direct currents, 6 peace the first DC relay KA1 and the second DC relay KA2, and the AC relay KA4 of AC 220 V forms; The control panel unit comprises the voltage table PV of one 0～250 volt, the horn in H A1 of one 220 volts, the single contact of three AC 220 Vs is often opened alarm release button SB1, double contact normally-open normally-close the first loop L11 testing button SB2 and second servo loop L12 testing button SB3, and the malfunction indicator lamp HL3 of malfunction indicator lamp HL2, the second servo loop L12 of three AC 220 V power lights white, the first loop L11 be redness.Circuit board unit is the first diode VD1, the second diode VD2, the 3rd diode VD3 and the 4th diode VD4 of four 0～500 volt 1 ampere.
Referring to Fig. 3, also be provided with the shell of iron sheet case in the outside of insulation tester, its large I is held transformer TC1, and the side of shell is provided with ventilation Cooling Holes 10 can cooling; Power outlet is 380 volts, and iron sheet case shell must ground connection.
For fear of the interference to relay signal, preferably the last layer at transformer arranges relay unit and circuit board unit, isolates with iron plate.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number does not represent the quality of embodiment just to description.
The above is only preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. an insulation tester, is characterized in that, comprising: power supply unit, and the alternating current of described power supply unit access 380V, the transformer by inside is converted to the 220V alternating current; 220V alternating current place in circuit protected location, relay unit, control panel unit, circuit board unit, the first terminals and the second terminals,
Described circuit protection unit comprises: the first fuse and the second fuse are realized the protection to circuit;
Described relay unit comprises: the first DC relay, the second DC relay and AC relay;
Described control panel unit comprises: voltage table, alarm release button, the first loop L11 testing button, second servo loop L12 testing button, power light, the malfunction indicator lamp of the first loop L11, malfunction indicator lamp and the loudspeaker of second servo loop L12;
Described circuit board unit is formed by the first diode, the second diode, the 3rd diode and the 4th welding diode;
Described the first diode, described the second diode and described the first DC relay have consisted of the first single-phase full-wave rectifer circuit; Described the 3rd diode, described the 4th diode and described the second DC relay have consisted of the second single-phase full-wave rectifer circuit; Described the first terminals and described the second tested power supply of wiring termination or tested control electric power loop;
The normally-open normally-close dot interlace series connection of described the first loop L11 testing button and described second servo loop L12 testing button realizes the switching inspection of two control loop interlockings and power supply;
The normally-open normally-close point of described AC relay consisted of the warning of fault jingle bell and removes warning circuit with the normal battle of described alarm release button, described the first DC relay and described the second DC relay;
Described power light and described voltage table form power indication signal.
2. a kind of insulation tester according to claim 1, is characterized in that, also is provided with the shell of iron sheet case in the outside of described insulation tester, and the side of shell is provided with the ventilation cooling vent.
3. a kind of insulation tester according to claim 1, is characterized in that, at the last layer of described transformer, described relay unit and described circuit board unit is set, and isolates with iron plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320015831 CN203012082U (en) | 2013-01-12 | 2013-01-12 | Insulation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320015831 CN203012082U (en) | 2013-01-12 | 2013-01-12 | Insulation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203012082U true CN203012082U (en) | 2013-06-19 |
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ID=48603664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320015831 Expired - Fee Related CN203012082U (en) | 2013-01-12 | 2013-01-12 | Insulation detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203012082U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399266A (en) * | 2013-08-16 | 2013-11-20 | 常熟市苏常工程质量检测有限公司 | Insulation performance testing equipment |
| CN108362980A (en) * | 2017-11-16 | 2018-08-03 | 广新海事重工股份有限公司 | A kind of ship insulation against ground test box |
| CN113109679A (en) * | 2021-04-26 | 2021-07-13 | 广东电网有限责任公司 | Multifunctional insulation detector and insulation detection method of wire core to be detected |
| CN114325185A (en) * | 2021-12-20 | 2022-04-12 | 韩铖琳 | Transformer low pressure wiring detection circuitry, PCB board and detection device |
-
2013
- 2013-01-12 CN CN 201320015831 patent/CN203012082U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399266A (en) * | 2013-08-16 | 2013-11-20 | 常熟市苏常工程质量检测有限公司 | Insulation performance testing equipment |
| CN108362980A (en) * | 2017-11-16 | 2018-08-03 | 广新海事重工股份有限公司 | A kind of ship insulation against ground test box |
| CN113109679A (en) * | 2021-04-26 | 2021-07-13 | 广东电网有限责任公司 | Multifunctional insulation detector and insulation detection method of wire core to be detected |
| CN113109679B (en) * | 2021-04-26 | 2022-07-29 | 广东电网有限责任公司 | Multifunctional insulation detector and insulation detection method of wire core to be detected |
| CN114325185A (en) * | 2021-12-20 | 2022-04-12 | 韩铖琳 | Transformer low pressure wiring detection circuitry, PCB board and detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130619 Termination date: 20210112 |