CN211456791U - Quick switch cabinet of single machine electrical equipment of large-scale unit - Google Patents
Quick switch cabinet of single machine electrical equipment of large-scale unit Download PDFInfo
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- CN211456791U CN211456791U CN202020099465.8U CN202020099465U CN211456791U CN 211456791 U CN211456791 U CN 211456791U CN 202020099465 U CN202020099465 U CN 202020099465U CN 211456791 U CN211456791 U CN 211456791U
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- over switch
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Abstract
The utility model provides a quick switch over cabinet of large-scale unit electrical equipment, relate to the key unit electrical equipment of the large-scale unit of petrochemical industry, include the first power and the second power of being connected with the medium-voltage inverter, the first change over switch and the second change over switch of power switching cabinet and the load end change over switch of load switching cabinet, first power is connected with first change over switch, the second power is connected with the second change over switch, first change over switch, the second change over switch is connected with first converter and second converter simultaneously, can be quick switch over between service equipment and standby equipment, and is simple and convenient, the fault section excision is thorough, the migration and the connection that need not carry out main loop cable and control circuit cable, be applicable to very much the higher key electrical equipment of large-scale unit fault rate and use.
Description
Technical Field
The utility model relates to a key unit electrical equipment of the large-scale unit of petrochemical industry, in particular to unit electrical equipment fast switch over cabinet of large-scale unit.
Background
Polyethylene device granulation unit is large-scale automatic integration unit, what adopt all is stand-alone equipment, the medium-voltage inverter that its speed governing system used also is stand-alone equipment, the converter that key stand-alone equipment used in large-scale unit, a controller, soft start, servo driver in case can't restore in the short time after great trouble appears, it needs to reconnect electric main loop and control circuit cable to change new equipment or migrate to ready standby equipment, and large-scale equipment main loop cable all is thick and heavy again, control circuit is comparatively complicated, it can consume a large amount of time to migrate and reconnect, to making the unit shut down for a long time, this patent can be fast switch between service equipment and standby equipment, the outage equipment can complete outage, make things convenient for repair and maintenance of faulty equipment, can resume the normal operating of large-scale unit rapidly.
The frequency converter electronic equipment has high failure rate, and is difficult to quickly repair after failure, so that a granulator set is often stopped for a long time, chain stopping of a polyethylene device is caused, and production and benefit are influenced.
Disclosure of Invention
The utility model aims at providing a quick switch over cabinet of mainframe group list electromechanical device to the not enough of prior art existence.
The utility model adopts the technical proposal that: a quick switching cabinet for electrical equipment of a large-scale unit and a single machine is technically characterized by comprising a first power supply and a second power supply which are connected with a medium-voltage frequency converter, a first change-over switch and a second change-over switch of the power supply switching cabinet and a load end change-over switch of the load switching cabinet, wherein the output end of the first power supply is connected with the primary side input end of the first change-over switch, the secondary side first output end of the first change-over switch is connected with the first input end of a first frequency converter, the secondary side second output end of the first change-over switch is connected with the first input end of a second frequency converter, the output end of the second power supply is connected with the primary side input end of the second change-over switch, the secondary side first output end of the second change-over switch is connected with the second input end of the first frequency converter, the secondary side second output end of the second frequency converter is connected with the second input end of the second frequency converter, the load output end of the first frequency converter is connected, the load output end of the second frequency converter is connected with the second input end of the primary side of the load end change-over switch, and the output end of the secondary side of the load end change-over switch is connected with the load motor.
The utility model has the advantages that: this fast switch over cabinet of single-machine electrical equipment of large-scale unit, include the first power and the second power of being connected with the medium-voltage inverter, the first change over switch of power switch over cabinet and the load end change over switch of second change over switch and load switch over cabinet, first power is connected with first change over switch, the second power is connected with the second change over switch, first change over switch, the second change over switch is connected with first converter and second converter simultaneously, can be quick switch over between service equipment and standby equipment, and is simple and convenient, the fault section excision is thorough, need not carry out the migration and the connection of major loop cable and control circuit cable, be applicable to very much that the higher key electrical equipment of large-scale unit fault rate uses.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit structure diagram of a fast switching cabinet of large-scale unit electrical equipment in an embodiment of the present invention;
fig. 2 is the embodiment of the utility model provides an in-cabinet circuit connection schematic diagram is switched fast to large-scale unit electrical equipment.
Detailed Description
The above objects, features and advantages of the present invention will be more clearly understood and appreciated, and the following description of the present invention will be made in conjunction with the accompanying drawings 1 and 2.
Take the application to polyethylene plant granulator groups as an example to illustrate, wherein, the melting pump is the core equipment of the whole granulator group, and the types of the driving motors are as follows: AMD500M6RBABFM operating voltage: 690V rated power: the 650KW speed regulating system uses the frequency converter model as follows: the ABB ACS880-800KW, this high-voltage inverter fault rate is higher, and it is very difficult to the problem restoration, increased reserve converter after key equipment risk assessment, but discover that original converter breaks down, it is also more difficult to the migration connection of load cable and control cable, it is long consuming time, for this reason increased the quick switch cabinet of large-scale unit single-machine electrical equipment of this embodiment between service equipment and reserve equipment, carry out quick switching, guaranteed need not to carry on the migration and the reconnection of main loop cable and control loop cable, reduce the down time of unit.
The fast switch cabinet for electrical equipment of large unit machine adopted in this embodiment includes a power supply Y and a power supply Δ connected to a medium voltage inverter, a 1# and a 2# switches of the power supply switch cabinet, and a load end 3# switch of the load switch cabinet, an output terminal of the power supply Y is connected to a primary side input terminal LaLbLc of the 1# switch, a secondary side output terminal La1Lb1Lc1 of the 1# switch is connected to a first input terminal of the 1# inverter, a secondary side La2Lb2Lc2 of the 1# switch is connected to a first input terminal of the 2# inverter, an output terminal of the power supply Δ is connected to a primary side input terminal LaLbLc of the 2# switch, a secondary side output terminal La1Lb1Lc1 of the 2# switch is connected to a second input terminal of the 1# inverter, a secondary side output terminal La2Lb2Lc2 of the 2# inverter is connected to a second input terminal La1 of the 2# inverter, a load output terminal of the 1# inverter is connected to a primary side input terminal La1Lb1Lc1 of the load end switch, the load output end of the 2# frequency converter is connected with a primary side input end La2Lb2Lc2 of the load end conversion switch, and a secondary side output end LaLbLc of the load end conversion switch is connected with the load motor.
When the 1# converter or the 2# converter of drive load broke down, can carry out the switching between 1#, the 2# converter fast, reduced the fault recovery time, effectual improvement device production efficiency to the converter of excision is whole to be kept apart with the power, is favorable to overhauing the operation.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A quick switching cabinet for electrical equipment of a large-scale unit single machine is characterized by comprising a first power supply and a second power supply which are connected with a medium-voltage frequency converter, a first change-over switch and a second change-over switch of the power supply switching cabinet, and a load end change-over switch of the load switching cabinet, wherein the output end of the first power supply is connected with the primary side input end of the first change-over switch, the secondary side first output end of the first change-over switch is connected with the first input end of a first frequency converter, the secondary side second output end of the first change-over switch is connected with the first input end of a second frequency converter, the output end of the second power supply is connected with the primary side input end of the second change-over switch, the secondary side first output end of the second change-over switch is connected with the second input end of the first frequency converter, the secondary side second output end of the second frequency converter is connected with the second input end of the second frequency converter, the load output end of the first frequency converter is connected with, the load output end of the second frequency converter is connected with the second input end of the primary side of the load end change-over switch, and the output end of the secondary side of the load end change-over switch is connected with the load motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099465.8U CN211456791U (en) | 2020-01-17 | 2020-01-17 | Quick switch cabinet of single machine electrical equipment of large-scale unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099465.8U CN211456791U (en) | 2020-01-17 | 2020-01-17 | Quick switch cabinet of single machine electrical equipment of large-scale unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211456791U true CN211456791U (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020099465.8U Active CN211456791U (en) | 2020-01-17 | 2020-01-17 | Quick switch cabinet of single machine electrical equipment of large-scale unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211456791U (en) |
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2020
- 2020-01-17 CN CN202020099465.8U patent/CN211456791U/en active Active
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