CN202474854U - Isolated single-phase power supply lightning protector - Google Patents
Isolated single-phase power supply lightning protector Download PDFInfo
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- CN202474854U CN202474854U CN2012201134419U CN201220113441U CN202474854U CN 202474854 U CN202474854 U CN 202474854U CN 2012201134419 U CN2012201134419 U CN 2012201134419U CN 201220113441 U CN201220113441 U CN 201220113441U CN 202474854 U CN202474854 U CN 202474854U
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Abstract
An isolated single-phase power supply lightning protector comprises a casing with mounting holes, as well as an input end wiring terminal, an output end wiring terminal, a primary lightning protector, a secondary lightning protector and a single-phase isolated transformer mounted in the casing, wherein the primary coil and the input end wiring terminal of the single-phase isolated transformer are connected, and the secondary coil and the output end wiring terminal are connected; and the primary coil of the single-phase isolated transformer is connected in parallel with the primary lightning protector, and the secondary coil is connected in parallel with the secondary lightning protector. The lightning protector has simple structure, and can obtain a better lightning protection effect without being grounded.
Description
Technical field
The utility model relates to a kind of lightning protection device, is specially a kind of isolated single phase poaer supply lightning protection device.
Background technology
A kind of instrument and equipment is arranged, and this instrument and equipment mainly is used in the large-scale construction of hydropower facilities engineering.Because this instrument and equipment is that (even can be described as among the hills and mountains high mountain) uses in the open air, at first, the probability that thunderbolt takes place this environment is local more much higher than general; Secondly, the situation of power supply facilities temporary erection is more, and its electric power system is not taked lightning protection measures; Once more; Powerful heavy construction equipment is many on the building site, and its starting operation and the very big switching overvoltage (being the switch overvoltage) that all can in supply line, produce out of service are so this instrument and equipment often is damaged.Therefore the following problem that has that needs solution.
1, solves the lightning protection problem: power consumption equipment is carried out lightning protection, take shielding, equipotential to connect, shunt (installation lightning protection device) and grounding measures usually.And the said equipment is to be used on the construction site; And it is constantly mobile with the propelling of engineering construction progress; Be difficult to take fairly perfect shielding, equipotential to connect lightning protection measures as the lightning protection that kind; It is extremely difficult especially to carry out lightning protection, because near the building site all be rock or mixed earth structures basically.Consider from shunting measure aspect; Generally multistage lightning protection device should be installed; Lightning surge voltage is slackened step by step, and the equipment that reaches at last can impaired level, and lightning protection device does not have good ground connection just can't play good shunting action; And multistage lightning protection device can't be installed, because need the distance of 10m just can play the effect of multistage lightning protection between every two-stage lightning protection device.In sum, adopt conventional method can't carry out effective lightning protection.
2, solve the switching overvoltage problem: a lot of powerful heavy construction equipments starting operation and out of service constantly on the building site; In supply line, produce very big switching overvoltage (being the switch overvoltage) continually; Though this switching overvoltage can all not cause electric equipment and damage at every turn; Wearing out but can quicken it, is the stealthy killer of various electric equipments.This problem is an insoluble thorny problem in the general electric equipment design production process itself.
The utility model content
The technical problem that the utility model solved is to provide a kind of isolated single phase poaer supply lightning protection device, to solve the problem in the above-mentioned background technology.
The technical problem that the utility model solved adopts following technical scheme to realize: isolated single phase poaer supply lightning protection device; Comprise the shell that is provided with installing hole; And installation input binding post, output end binding post, one-level lightning protection device, secondary lightning protection device and single-phase isolating transformer in the enclosure; The primary coil of said single-phase isolating transformer is connected with the input binding post, and secondary coil is connected with output end binding post; The primary coil of said single-phase isolating transformer is parallelly connected with the one-level lightning protection device, and secondary coil is parallelly connected with the secondary lightning protection device.
Said one-level lightning protection device is composed in series by one-level piezo-resistance and main air switch, and its nominal discharge capacity is 60kA; The secondary lightning protection device is composed in series by secondary piezo-resistance and secondary air switch, and its nominal discharge capacity is 20kA; The rated power of single-phase isolating transformer is that 500W is to 5000W; The rated operational current of input binding post and output end binding post is 63A.
Beneficial effect:The utility model is simple in structure, need not ground connection and just can play reasonable lightning protection effect.
Description of drawings
Fig. 1 is the cut-away view of the isolated single phase poaer supply lightning protection device of the utility model.
Fig. 2 is the electrical schematic diagram of the isolated single phase poaer supply lightning protection device of the utility model.
Wherein: 1 installing hole, 2 secondary lightning protection devices, 3 shells, 4 output end binding posts, 5 input binding posts, 6 single-phase isolating transformers, 7 one-level lightning protection devices.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
Like Fig. 1, shown in Figure 2; Isolated single phase poaer supply lightning protection device; Comprise the shell 3 that is provided with installing hole 1; And be installed in input binding post 5, output end binding post 4, one-level lightning protection device 7, secondary lightning protection device 2 and the single-phase isolating transformer 6 in the shell 3, and the primary coil of said single-phase isolating transformer 6 is connected with input binding post 5, and secondary coil is connected with output end binding post 4; The primary coil of said single-phase isolating transformer 6 is parallelly connected with one-level lightning protection device 7, and secondary coil is parallelly connected with secondary lightning protection device 2.
Said one-level lightning protection device 7 is composed in series by one-level piezo-resistance 71 and main air switch 72, and its nominal discharge capacity is 60kA; Secondary lightning protection device 2 is composed in series by secondary piezo-resistance 22 and secondary air switch 21, and its nominal discharge capacity is 20kA; The rated power of single-phase isolating transformer 6 is that 500W is to 5000W; The rated operational current of input binding post 5 and output end binding post 4 is 63A.
Said shell 3 is the cold-rolled steel sheet shell, and surface plastic spraying is handled, and is of a size of long 270mm * wide 255mm * thick 130mm.
The operation principle of the isolated single phase poaer supply lightning protection device of the utility model: the votage limit type lightning-protection module (SPD) that adopts piezo-resistance (MOV) to make the earial drainage element is the responsive semiconductor element of a kind of non-linear voltage type; Under normal circumstances be in high resistance state (being equivalent to open circuit); When the overvoltage of supply line is higher than its operation voltage; Piezo-resistance (MOV) can become low resistance state (being equivalent to short circuit) in the time of nanosecond, thereby the lightning surge voltage in the supply line and switching overvoltage (following unification is called pulse current) are controlled in the scope that power consumption equipment can bear.Single-phase isolating transformer mainly is made up of primary coil and secondary coil; Primary coil and secondary coil in the single-phase isolating transformer have very big inhibitory action to high-frequency pulse signal; Be that high-frequency signal can not pass through; And low frequency signal can pass through, and the power supply signal in the supply line can pass through for interchange 50Hz (wavelength is a Millisecond) belongs to low frequency signal, and the pulse current wavelength can not pass through for the microsecond level belongs to high-frequency signal.This design is exactly to utilize extraordinary non-linear characteristics of piezo-resistance (MOV) and the logical low frequency resistance of transformer interior loop inductance high frequency characteristics in the lightning-protection module; And they are organically combined, thereby reach very perfect prevent lightning surge voltage and switching overvoltage power consumption equipment is damaged.
Pulse current to electric equipment play destruction mainly be pulse current cause between the power circuit and power circuit and equipment components between high voltage differential; The lightning voltage of responding on the power circuit generally has several ten thousand volts; Even the hundreds of thousands volt, and the pulse voltage that general device can be born is in 1500 volts.As shown in Figure 1; When on the power input line road of power consumption equipment pulse current being arranged; At first one-level lightning protection device action (operation voltage is 620 volts, and operate time is in 25 nanoseconds), with the voltage limit of pulse current in several kilovars; Utilize the high induction reactance characteristic of primary coil of single-phase isolating transformer further the voltage magnitude of pulse current to be reduced simultaneously, have only very little a part of pulse current to be got into the output end binding post of single-phase isolating transformer by the secondary coil coupling.At this moment the secondary lightning protection device begins action; The secondary lightning protection device itself has the effect of deboost on the one hand; Form a loop with secondary coil on the other hand and make pulse current, further reduce the voltage (below reaching 1000 volts) between the circuit in this middle digestion of returning, thus the protection power consumption equipment.So need not ground connection, this lightning protection device just can play reasonable lightning protection effect.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (2)
1. isolated single phase poaer supply lightning protection device; Comprise the shell that is provided with installing hole; And installation input binding post, output end binding post, one-level lightning protection device, secondary lightning protection device and single-phase isolating transformer in the enclosure; It is characterized in that the primary coil of said single-phase isolating transformer is connected with the input binding post, secondary coil is connected with output end binding post; The primary coil of said single-phase isolating transformer is parallelly connected with the one-level lightning protection device, and secondary coil is parallelly connected with the secondary lightning protection device.
2. isolated single phase poaer supply lightning protection device according to claim 1 is characterized in that said one-level lightning protection device is composed in series by one-level piezo-resistance and main air switch, and the secondary lightning protection device is composed in series by secondary piezo-resistance and secondary air switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201134419U CN202474854U (en) | 2012-03-23 | 2012-03-23 | Isolated single-phase power supply lightning protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201134419U CN202474854U (en) | 2012-03-23 | 2012-03-23 | Isolated single-phase power supply lightning protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202474854U true CN202474854U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201134419U Expired - Fee Related CN202474854U (en) | 2012-03-23 | 2012-03-23 | Isolated single-phase power supply lightning protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN202474854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592479A (en) * | 2013-11-28 | 2014-02-19 | 深圳供电局有限公司 | Isolation transformer for partial discharge detection of distribution transformer |
-
2012
- 2012-03-23 CN CN2012201134419U patent/CN202474854U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592479A (en) * | 2013-11-28 | 2014-02-19 | 深圳供电局有限公司 | Isolation transformer for partial discharge detection of distribution transformer |
| CN103592479B (en) * | 2013-11-28 | 2016-09-21 | 深圳供电局有限公司 | Isolation transformer for partial discharge detection of distribution transformer |
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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 |
Granted publication date: 20121003 Termination date: 20180323 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |