CN205429872U - ESD system - Google Patents

ESD system Download PDF

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Publication number
CN205429872U
CN205429872U CN201521050580.1U CN201521050580U CN205429872U CN 205429872 U CN205429872 U CN 205429872U CN 201521050580 U CN201521050580 U CN 201521050580U CN 205429872 U CN205429872 U CN 205429872U
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China
Prior art keywords
power supply
esd
supply unit
ground wire
power
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Active
Application number
CN201521050580.1U
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Chinese (zh)
Inventor
李武强
杨海广
贺国荣
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Inner Mongolia Yitai Cto Co ltd
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Inner Mongolia Yitai Cto Co ltd
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Priority to CN201521050580.1U priority Critical patent/CN205429872U/en
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Abstract

The utility model relates to a ESD system. This system includes: power supply unit and power supply loop, wherein: power supply unit is used for producing corresponding other voltage of level as required in order to offer power supply loop with the commercial power. The utility model provides a power supply loop provides the electric energy through inputing the isolation transformer export power supply device, makes power supply unit and exchanges supply input and keep apart completely, and demolish piezo -resistor R3, realize that power supply unit works smoothly. The utility model discloses safety and stability operation for a long time.

Description

A kind of ESD system
Technical field
This utility model relates to power supply technical field, particularly relates to a kind of ESD system.
Background technology
In prior art, the Central Control Room ESD system power supply of certain company, is powered by Central Control Room UPS device, and neutral point is designed as earth-free output, and Central Control Room ESD system, DCS system do not have independent grounding system.In running, the neutral conductor of power supply has the overvoltage of 0~300V over the ground, producing high-tension reason is out of phase live wire and ground wire interval electric leakage, causes producing between live wire and ground wire overvoltage, or the neutral conductor produces variation and causes producing between live wire and ground wire overvoltage.
As it is shown on figure 3, above-mentioned ESD system power supply module uses same type varistor R1, R2, R3, produce to produce in system and under high-pressure situations, protect power supply.If varistor R1, R2 do not damage, illustrate that the resistance value sum of varistor R1 and R2 can bear the transient overvoltage between phase line and ground wire;It is in operation, is applied to the transient overvoltage between the ESD system power supply neutral conductor and ground wire, often occurs more than the breakdown voltage of varistor R3, frequently result in varistor R3 and burn.In actual application, varistor R3 often damages, and causes ESD operation system dead electricity, and the substantial equipment accident that process units stops completely thus brings great economic loss.
Utility model content
One of them purpose of the present utility model is to provide a kind of ESD system, the technical problem that the pressure sensitive voltage R3 caused to solve to there is overvoltage between the neutral conductor and ground wire in ESD system supply unit in prior art is often burned out.
For realizing above-mentioned utility model purpose, this utility model embodiment provides a kind of ESD system, including: supply unit and current supply circuit, wherein: described supply unit is for producing the voltage of appropriate level as required to be supplied to described current supply circuit by civil power.
Alternatively, described current supply circuit includes ups power.
Alternatively, described ups power includes total harmonic distortion wave filter and pulse rectifier, and described current supply circuit also includes inputting isolating transformer;The input of described input isolating transformer is connected with described total harmonic distortion filter output, and its outfan is connected with the input of described pulse rectifier.
Alternatively, the ESD system that this utility model embodiment provides also includes bypass power supply loop, for switching described bypass power supply loop power supply when described current supply circuit breaks down.
Alternatively, described supply unit includes that live wire, the neutral conductor and ground wire, described live wire, the described neutral conductor and described ground wire are connected to mainframe;Varistor R1 it is provided with between described live wire and the described neutral conductor, varistor R2 it is provided with between the described neutral conductor and described ground wire, described ground wire connects instrumentation grounding line, described instrumentation grounding line connects electric earth mat by electrical leakage voltage device and is finally connected with electric earth mat, described supply unit also includes: grounded screen device, and described grounded screen device connects described ground wire.
Alternatively, the ESD system that this utility model embodiment provides also includes stand-by power supply;Power for automatically switching to described stand-by power supply when described supply unit fault.
The current supply circuit that this utility model provides provides electric energy through input isolating transformer output power supply device, makes supply unit completely isolated with electric main input;And varistor R3 is removed, it is achieved the reliable and stable operation of supply unit.This utility model can long-term safety stable operation.
Accompanying drawing explanation
By being more clearly understood from feature and advantage of the present utility model with reference to accompanying drawing, accompanying drawing is schematic and should not be construed as this utility model is carried out any restriction, in the accompanying drawings:
Fig. 1 is a kind of ESD system block diagram that this utility model embodiment provides;
Fig. 2 is current supply circuit circuit diagram in this utility model embodiment;
Fig. 3 is supply unit circuit diagram in prior art;
Fig. 4 is supply unit circuit diagram in this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, detailed description of the invention of the present utility model is described in further detail.Following example are used for illustrating this utility model, but are not limited to scope of the present utility model.
Certain company's Central Control Room ESD system, is powered by ups power, and neutral point is designed as earth-free output.Central Control Room ESD system, DCS system do not have independent grounding system, share with electrical ground system, in running, detect that in ESD system, the neutral conductor has the overvoltage of 0~300V over the ground, producing high-tension reason is that riding over of out of phase live wire batch (-type) drain voltage causes live wire and ground wire voltage superelevation on ground wire, or the neutral conductor produces voltage deviation and causes producing between live wire and ground wire overvoltage.As it is shown on figure 3, varistor R1, R2, R3 are same type varistor, effect is to protect ESD system, DCS system supply unit under producing high-pressure situations.In supply unit, varistor R1, R2 do not damage, and illustrate that the resistance value sum of R1 and R2 can bear the transient overvoltage between phase line and ground wire.And overvoltage has exceeded the breakdown voltage of varistor R3, cause varistor R3 to burn, cause ESD system not work and easily cause equipment breakdown.
For solving the problems referred to above, this utility model embodiment provides a kind of ESD system, as it is shown in figure 1, include supply unit and current supply circuit, wherein: supply unit is for producing the voltage of appropriate level as required to be supplied to current supply circuit by civil power.
It will be appreciated that this utility model embodiment current supply circuit includes ups power.As in figure 2 it is shown, this ups power includes total harmonic distortion THD wave filter and pulse rectifier.This current supply circuit also includes inputting isolating transformer.The input of this input isolating transformer is connected with the outfan of above-mentioned total harmonic distortion THD wave filter, and its outfan is connected with the input of described pulse rectifier.
For realizing ESD system reliable power supply, as in figure 2 it is shown, the ESD system that this utility model embodiment provides also includes bypass power supply loop, for switching this bypass power supply loop power supply when current supply circuit breaks down.
As shown in Figure 4, the supply unit that this utility model embodiment provides includes live wire, the neutral conductor and ground wire.Above-mentioned live wire, the neutral conductor and ground wire are connected to mainframe;Being provided with varistor R1 between live wire and the neutral conductor, be provided with varistor R2 between the neutral conductor and ground wire, ground wire connects instrumentation grounding line, and instrumentation grounding line connects electric earth mat, and supply unit also includes: grounded screen device.This grounded screen device connects described ground wire.
For realizing ESD system reliable power supply, alternatively, the ESD system that this utility model embodiment provides also includes stand-by power supply;Power for switching to stand-by power supply when supply unit lost efficacy.Supply unit all runs with stand-by power supply under full load and rated temperature, and supply unit does not affect ESD system with stand-by power supply when switching and runs.When Logical Configuration clashes or supply unit " low electricity " or " overtemperature " occurs, triggering is reported to the police by supply unit or stand-by power supply.
The ESD system that this utility model embodiment provides uses new grounded screen to replace electrical grounding net so that the protective grounding system that in prior art, DCS, ESD switch board composition is independent, with DCS, ESD, electrical grounding net is controlled rack grounded screen and thoroughly separates;Varistor R3 is removed, to ensure the reliable and stable operation of supply unit;In current supply circuit UPS, install input isolating transformer additional, by primary power source and load thoroughly isolation, and exported with ground connection short circuit, to eliminate current supply circuit fault at the secondary side neutral conductor of this input isolating transformer.The ESD system supply unit outfan that this utility model provides is completely isolated with electric main input, the electrical network public hazards such as electrical network noise jamming, transient grid impact can be substantially eliminated and thoroughly solve ground connection part-loading goods network system problem, make the long-term safety stable operation of process units.
In this utility model, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicate or hint relative importance.Term " multiple " refers to two or more, unless otherwise clear and definite restriction.
Although being described in conjunction with the accompanying embodiment of the present utility model, but those skilled in the art can make various modifications and variations in the case of without departing from spirit and scope of the present utility model, within the scope of such amendment and modification each fall within and be defined by the appended claims.

Claims (5)

1. an ESD system, it is characterised in that including: supply unit and current supply circuit, wherein: described supply unit is for producing the voltage of appropriate level as required to be supplied to described current supply circuit by civil power;Described current supply circuit includes ups power;Described ups power includes total harmonic distortion wave filter and pulse rectifier, and described current supply circuit also includes inputting isolating transformer;The input of described input isolating transformer is connected with described total harmonic distortion filter output, and its outfan is connected with the input of described pulse rectifier.
ESD system the most according to claim 1, it is characterised in that the neutral earthing of the output end of described input isolating transformer.
3. according to the ESD system described in claim 1~2 any one, it is characterised in that also include bypass power supply loop, for switching described bypass power supply loop power supply when described current supply circuit breaks down.
ESD system the most according to claim 1, it is characterised in that described supply unit includes that live wire, the neutral conductor and ground wire, described live wire, the described neutral conductor and described ground wire are connected to mainframe;Varistor R1 it is provided with between described live wire and the described neutral conductor, varistor R2 it is provided with between the described neutral conductor and described ground wire, described ground wire connects instrumentation grounding line, finally it is connected with electric earth mat, described supply unit also includes: grounded screen device, and described grounded screen device connects described ground wire.
ESD system the most according to claim 4, it is characterised in that also include stand-by power supply;Power for automatically switching to described stand-by power supply when described supply unit fault.
CN201521050580.1U 2015-12-15 2015-12-15 ESD system Active CN205429872U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521050580.1U CN205429872U (en) 2015-12-15 2015-12-15 ESD system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521050580.1U CN205429872U (en) 2015-12-15 2015-12-15 ESD system

Publications (1)

Publication Number Publication Date
CN205429872U true CN205429872U (en) 2016-08-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106125691A (en) * 2016-08-04 2016-11-16 石河子开发区天业化工有限责任公司 Polymerization ESS and DCS integrated emergency safety production control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106125691A (en) * 2016-08-04 2016-11-16 石河子开发区天业化工有限责任公司 Polymerization ESS and DCS integrated emergency safety production control method
CN106125691B (en) * 2016-08-04 2018-10-23 石河子天域新实化工有限公司 Polymerization ESS and DCS integrates emergency safety production control method

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