CN206321740U - A kind of new intermediate frequency power supply system leakage current monitoring device - Google Patents
A kind of new intermediate frequency power supply system leakage current monitoring device Download PDFInfo
- Publication number
- CN206321740U CN206321740U CN201621371720.XU CN201621371720U CN206321740U CN 206321740 U CN206321740 U CN 206321740U CN 201621371720 U CN201621371720 U CN 201621371720U CN 206321740 U CN206321740 U CN 206321740U
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- CN
- China
- Prior art keywords
- leakage current
- intermediate frequency
- frequency power
- power supply
- current monitoring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model is related to a kind of new intermediate frequency power supply system leakage current monitoring device, including electric capacity (1), resistance (2), effective grounding point (3), current transformer (4), leakage current monitoring module (5), PLC (7), HMI operation interfaces (8), DICU control centres (9) and intermediate frequency power supply (10), electric capacity (1), resistance (2), current transformer (4), effective grounding point (3) is sequentially connected, electric capacity (1) other end connection intermediate frequency power supply (10), intermediate frequency power supply (10) is connected with DICU control centres (9), current transformer (4) is connected with leakage current monitoring module (5), leakage current monitoring module (5) connection PLC (7), HMI operation interfaces (8) are connected on PLC (7), DICU control centres (9)；The utility model greatly improves monitoring sensitivity, and easy installation and removal is quick, and monitoring range is wide, and monitors safe and stable.
Description
[technical field]
The utility model is related to cavityless casting technical field, specifically a kind of new intermediate frequency power supply system leakage current prison
Survey device.
[background technology]
With the development of casting industry, also more and more higher, especially safety and environment are dirty for requirement of the country to relevant industries
In terms of dye.Environmental requires more and more higher, the process that middle frequency furnace substitutes traditional furnace cupola is promoted, with medium frequency electric
Stove is increasingly widely applied to casting industry, and this also make it that people propose more and more higher to the security reliability of middle frequency furnace
Requirement.Middle frequency furnace belongs to high-voltage large current equipment, and it is exactly personnel behaviour to weigh central most important two of intermediate frequency furnace safety
Make safety and equipment safety protection, and in equipment running process, the leakage current monitoring device of middle frequency furnace is exactly used for protecting
The safe operation of personnel and the inherently safe of protection equipment.
[utility model content]
The purpose of this utility model seeks to solve above-mentioned deficiency and provide a kind of new intermediate frequency power supply system leakage current
Monitoring device, greatly improves monitoring sensitivity, and easy installation and removal is quick, and monitoring range is wide, and monitors safe and stable, sound
Answer speed fast.
Design a kind of new intermediate frequency power supply system leakage current monitoring device to achieve the above object, including electric capacity 1, resistance 2,
Effective grounding point 3, current transformer 4, leakage current monitoring module 5, PLC7, HMI operation interface 8, DICU control centres 9 and intermediate frequency
Power supply 10, the electric capacity 1, resistance 2, current transformer 4, effective grounding point 3 are sequentially connected, and the other end of electric capacity 1 is connected with
Intermediate frequency power supply 10, the intermediate frequency power supply 10 is connected with DICU control centres 9, the current transformer 4 and leakage current monitoring mould
Block 5 is connected, and the leakage current monitoring module 5, which is connected, is connected to HMI operation interfaces 8, DICU controls on PLC7, the PLC7
Center 9 processed.
Also include leakage current value and show table 6, the leakage current value shows that table 6 passes through PLC7 and the phase of leakage current monitoring module 5
Connection.
The leakage current value shows the connection electric leakage alarm device of table 6, and the electric leakage alarm device is connected respectively by circuit
PLC7, HMI operation interface 8.
The resistance 2 is provided between two, two resistance 2 and is arranged in parallel.
The intermediate frequency power supply 10 is provided with two, and two intermediate frequency power supplies 10 are respectively connecting to intermediate frequency power supply system.
The utility model compared with the existing technology, has the following advantages that：
(1) monitoring sensitivity is greatly improved, traditional differential type leakage current monitoring device response time >=100MS, and
The manifold type leakage current monitoring device response time described in the utility model is up to 10≤10MS；
(2) easy installation and removal is quick, and traditional differential type leak current detection device needs rectifier transformer neutral point to connect
Ground, and the conductive material diametric requirements of installation site are necessarily less than with the diameter of monitoring device, and it is described in the utility model
Manifold type leakage current monitoring device only needs to fill a screw hole in monitoring position and connected with a wire；
(3) monitoring range is wide, and traditional differential type leakage current monitoring scope is mainly installation site back-end circuit, i.e. inversion
Rear end electric furnace, and manifold type leak source stream monitoring device described in the utility model is except that can monitor inversion back-end circuit, inversion
Leading portion is until rectifier transformer secondary side can obtain conduct monitoring at all levels；
(4) manifold type leakage current monitoring device described in the utility model can manually set alarm numerical value, convenient and swift；
To sum up, intermediate frequency power supply system leakage current monitoring equipment safety described in the utility model, stably, fast response time,
It can adapt to the new technical requirements that modern production is constantly proposed to casting industry human users safety and equipment safety.
[brief description of the drawings]
Fig. 1 is theory diagram of the present utility model；
In figure：1st, electric capacity 2, resistance 3, effective grounding point 4, current transformer 5, leakage current monitoring module 6, leakage current value show
Show table 7, PLC 8, HMI operation interfaces 9, DICU control centres 10, intermediate frequency power supply.
[embodiment]
Further explained below is made to the utility model below in conjunction with the accompanying drawings：
The utility model carries out real-time monitoring and protecting work(in order to allow coupling leakage current monitoring module to power-supply system
Can, mainly it is made up of following part：Electric capacity 1, resistance 2, effective grounding point 3, current transformer 4, leakage current monitoring module 5,
PLC7, HMI operation interface 8, DICU control centres 9 and intermediate frequency power supply 10, electric capacity 1, resistance 2, current transformer 4, effective grounding
Point 3 is sequentially connected, and the other end of electric capacity 1 is connected with intermediate frequency power supply 10, and intermediate frequency power supply 10 is connected with DICU control centres 9, electric current
Transformer 4 is connected with leakage current monitoring module 5, and HMI behaviour is connected on the connection of leakage current monitoring module 5 PLC7, PLC7
Make interface 8, DICU control centres 9.
The utility model also includes leakage current value and shows table 6, and leakage current value shows that table 6 passes through PLC7 and leakage current monitoring mould
Block 5 is connected, leakage current value show table 6 connection electric leakage alarm device, electric leakage alarm device connected respectively by circuit PLC7,
HMI operation interfaces 8.Resistance 2 is provided between two, two resistance 2 and is arranged in parallel；Intermediate frequency power supply 10 is also equipped with two, two
Individual intermediate frequency power supply 10 is respectively connecting to intermediate frequency power supply system.
Coupling leak current detection device described in the utility model by wire access the female board → electric capacity in inversion direct current side →
Through current transformer → 2 parallel resistance → effective grounding, then the two of current transformer piece signal wire feeds back to leakage current
Monitoring modular, leakage current monitoring module will be sent to PLC after signal transacting, PLC will be transported to server after signal transacting, reach
Monitoring in real time.The flow module that leaks electricity simultaneously is compared to signal and setting value, and when delivery value is more than setting value, leakage current sends event
Hinder signal to PLC, PLC can signal to DICU control centres and server, in final server display alarm and DICU controls
The heart can automatic rapidly switching off power safety.The key technology of whole control process be leakage current monitoring module can≤
Monitoring is scanned to leakage current in the 10MS cycles, and accurately fast and effectively passes the signal to PLC module, and signal is passed
Shu Ge DICU control centres carry out shut-off equipment.
In the utility model, electric capacity, effect is to disconnect the dc source of main power source and the coupling of rear end earth point.2 electricity
Resistance, effect is impact of the effective limitation leakage current to coupled capacitor when there is impact leakage current, plays the work of protection electric capacity
With.Effective grounding point, effect is to ensure that the earth point with all devices periphery is in equipotential, it is ensured that system is locally grounded
When, what leakage current can be unimpeded returns to test point, so as to ensure the controllability of detection arrangement monitors data.Current transformer,
Effect is that the leakage current between electric capacity and 2 resistance is converted into the leakage current monitoring module that current signal sends rear end to.Leakage
Current monitoring module, effect is, by system leakage current signal, by internal enhanced processing, to convert the signal into digital switch quantity letter
Number and analog signalses (0--10V) be respectively transmitted to PLC module and leakage current display table, alarm leakage current setting value can basis
Actually used situation takes up an official post to anticipate in electric leakage flow module to be set.Electric leakage flow table, effect is to receive leakage current monitoring module to send
Leakage current numerical value, and intuitively show leakage current value (0--100MA).Data processing PLC, effect is to pass electric leakage flow module
HMI operation interfaces and DICU control centres are sent the data to after the signal brought, processing, during failure, display alarm respectively
With shut-off operational outfit.HMI operation interfaces, effect is the HMI interface display fault messages, so as to correlation when leakage current is alarmed
Personnel carry out accident analysis.DICU control centres, effect is, when there is leakage current failure, to turn off equipment.Intermediate frequency power supply part,
Effect is that the protection object of manifold type leakage current monitoring device mainly is exactly intermediate frequency power supply part, belongs to high current high voltage and sets
It is standby, the emphasis equipment in casting industry.
After the system installation, set after leakage current monitoring module alarming value, need to be supervised with scope calibration leakage current
Module is surveyed, main power circuit injection simulation leakage current is given after the completion of correction, observation electric leakage flow table displays whether normally, to set when reaching
During definite value, there is leakage current alarm indication in HMI operation interfaces in system, and PLC system sends instructions to DICU and requires shut-off
Power supply.Whole process normally debugs completion.
The utility model is simultaneously not limited to the embodiments described above limitation, other any real without departing from spirit of the present utility model
Matter and the change made under principle, modification, replacement, combine, simplify, should be equivalent substitute mode, be included in this practicality
Within new protection domain.
Claims (5)
1. a kind of new intermediate frequency power supply system leakage current monitoring device, it is characterised in that：Including electric capacity (1), resistance (2), effectively
Earth point (3), current transformer (4), leakage current monitoring module (5), PLC (7), HMI operation interfaces (8), DICU control centres
(9) and intermediate frequency power supply (10), the electric capacity (1), resistance (2), current transformer (4), effective grounding point (3) are sequentially connected, institute
State electric capacity (1) other end and be connected with intermediate frequency power supply (10), the intermediate frequency power supply (10) is connected with DICU control centres (9), institute
State current transformer (4) with leakage current monitoring module (5) to be connected, leakage current monitoring module (5) the connection PLC (7) is described
HMI operation interfaces (8), DICU control centres (9) are connected on PLC (7).
2. new intermediate frequency power supply system leakage current monitoring device as claimed in claim 1, it is characterised in that：Also include leakage current
Value shows table (6), and the leakage current value shows that table (6) is connected by PLC (7) with leakage current monitoring module (5).
3. new intermediate frequency power supply system leakage current monitoring device as claimed in claim 2, it is characterised in that：The leakage current value
Table (6) connection electric leakage alarm device is shown, the electric leakage alarm device connects PLC (7), HMI operation interfaces by circuit respectively
(8)。
4. new intermediate frequency power supply system leakage current monitoring device as claimed in claim 2 or claim 3, it is characterised in that：The resistance
(2) it is provided between two, two resistance (2) and is arranged in parallel.
5. new intermediate frequency power supply system leakage current monitoring device as claimed in claim 4, it is characterised in that：The intermediate frequency power supply
(10) two are provided with, two intermediate frequency power supplies (10) are respectively connecting to intermediate frequency power supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621371720.XU CN206321740U (en) | 2016-12-14 | 2016-12-14 | A kind of new intermediate frequency power supply system leakage current monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621371720.XU CN206321740U (en) | 2016-12-14 | 2016-12-14 | A kind of new intermediate frequency power supply system leakage current monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206321740U true CN206321740U (en) | 2017-07-11 |
Family
ID=59267243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621371720.XU Expired - Fee Related CN206321740U (en) | 2016-12-14 | 2016-12-14 | A kind of new intermediate frequency power supply system leakage current monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206321740U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032138A (en) * | 2019-05-08 | 2019-07-19 | 上海宏英智能科技有限公司 | A kind of power-supply management system of excavator |
-
2016
- 2016-12-14 CN CN201621371720.XU patent/CN206321740U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032138A (en) * | 2019-05-08 | 2019-07-19 | 上海宏英智能科技有限公司 | A kind of power-supply management system of excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20201214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |