CN214013871U - 660V main motor and power supply system of auxiliary machine matched with same - Google Patents
660V main motor and power supply system of auxiliary machine matched with same Download PDFInfo
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- CN214013871U CN214013871U CN202023017527.5U CN202023017527U CN214013871U CN 214013871 U CN214013871 U CN 214013871U CN 202023017527 U CN202023017527 U CN 202023017527U CN 214013871 U CN214013871 U CN 214013871U
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Abstract
The utility model discloses a 660V main motor and power supply system of supporting auxiliary engine thereof, including 660V 400V dry-type transformer, 660V main motor, 380V auxiliary engine and 220V auxiliary engine, the power supply of 660V 400V dry-type transformer, 660V main motor, 380V auxiliary engine and 220V auxiliary engine, control circuit integration are in one side 660V low-voltage switchgear, and this site operation of being convenient for also can reduce the work load of operation maintenance in the production process. The high-voltage side voltage of the 660V/400V dry-type transformer is 660V, the low-voltage side voltage is 400V, and a 380V auxiliary machine and a 220V auxiliary machine are connected to the low-voltage side of the 660V/400V dry-type transformer. The utility model discloses a 660V main motor and supporting 380V 220V auxiliary engine power all draw from the 660V low-voltage switchgear after the integration, compare with traditional power supply mode and power supply system, the utility model discloses simpler, safe, reliable.
Description
Technical Field
The utility model relates to a power supply system technical field especially relates to a 660V main motor and power supply system of supporting auxiliary engine thereof.
Background
The voltage grade of a low-voltage motor commonly used in China at present is 380V. For a variable frequency motor with larger power, if the variable frequency motor is still powered by 380V voltage, the motor can not be started normally, and if the variable frequency motor is powered by 6kV or 10kV voltage, a 6kV or 10kV frequency converter is high in manufacturing cost, large in occupied area, large in heat generation and poor in heat dissipation. In this case, the 660V power supply is a reasonable choice.
Compared with a motor with the same power, the motor with 660V voltage has the advantages of lower rated current, smaller required cable section and lower cable cost. Therefore, 660V voltage levels are increasingly being noted and used.
When the 660V main motor is provided with the auxiliary machine and the auxiliary machine power supply voltage is 380V/220V, if the traditional power supply mode is adopted, the 660V bus section and the 380V bus section in the substation need to be respectively supplied with power for the main motor and the auxiliary machine.
When 660V main motor and 380V 220V auxiliary engine are emergency load, and only 660V emergency bus section in the electric substation, when no 380V emergency bus section, if adopt traditional power supply mode, have two kinds of power supply schemes as follows:
in the first scheme, a 380V emergency bus section needs to be additionally arranged in the substation, namely a 660V/400V independent transformer and a 380V low-voltage switch cabinet need to be additionally arranged, and the size of the substation is correspondingly increased.
And in the second scheme, the 660V main motor obtains power from the 660V emergency bus section of the local substation, and the 380V/220V auxiliary motor obtains power from the 380V emergency bus section of the nearby substation. Because the control linkage exists between the main machine and the auxiliary machine, the length of the control cable is increased in a large range by adopting the power supply mode, the cable cost is increased, and the possibility of signal interference is increased. In addition, the induced voltage is proportional to the length of the control cable, and as the induced voltage increases, the possibility of malfunction of the device is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: to the problem that adopts traditional power supply mode to exist, the utility model provides a 660V main motor and supporting auxiliary engine's power supply system can practice thrift space, save equipment and material cost, make things convenient for the operation maintenance, increase motor operational reliability.
The utility model discloses be suitable for but not limited to following occasion: only 660V bus sections and no 380V bus sections exist in the substation; only 660V emergency bus sections and no 380V emergency bus sections are arranged in the substation; the space in the substation is compact, and no sufficient 380V low-voltage switch cabinet is added; the complete set of electric equipment is powered by a local switch cabinet, and the complete set of electric equipment comprises a 660V main motor and a 380V/220V auxiliary motor matched with the 660V main motor.
The technical scheme of the utility model is realized like this:
A660V main motor and a power supply system of auxiliary machines matched with the 660V main motor comprise a 660V/400V dry-type transformer, a 660V main motor, a 380V auxiliary machine and a 220V auxiliary machine, wherein power supply and control loops of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machine and the 220V auxiliary machine are integrated in a 660V low-voltage switch cabinet on one surface, so that the 660V low-voltage switch cabinet is convenient for field construction, and the workload of operation and maintenance in the production process can be reduced. The high-voltage side voltage of the 660V/400V dry-type transformer is 660V, the low-voltage side voltage of the 660V/400V dry-type transformer is 400V, and the 380V auxiliary machine and the 220V auxiliary machine are connected to the low-voltage side of the 660V/400V dry-type transformer.
Further, the dry-type transformer further comprises a first circuit breaker used for realizing control and protection of the 660V/400V dry-type transformer.
Further, the auxiliary device further comprises a second circuit breaker, a second contactor and a second thermal relay, and the second circuit breaker, the second contactor and the second thermal relay are used for jointly realizing control and protection of the 380V auxiliary device.
Further, the device also comprises a third circuit breaker and a third contactor, and the third circuit breaker and the third contactor are used for jointly realizing control and protection of the 220V auxiliary machine.
Further, the device also comprises a meter and an indicator light, and the meter and the indicator light are used for displaying the current, the voltage, the power and the state of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machine and the 220V auxiliary machine.
Furthermore, the safety protection device also comprises an isolating switch which is used for connecting or disconnecting the power supply of the 660V low-voltage switch cabinet and ensuring the safety of the 660V low-voltage switch cabinet during the maintenance of electrical equipment.
Furthermore, power cables and control cables of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machine and the 220V auxiliary machine are all led out from the 660V low-voltage switch cabinet to electric equipment, so that the field construction is facilitated, and the workload of operation and maintenance in the production process can be reduced.
Further, the control cables of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machine and the 220V auxiliary machine are internal cables of the 660V low-voltage switch cabinet. The control cable between the 660V low-voltage switch cabinet and the 380V low-voltage switch cabinet is changed into the 660V low-voltage switch cabinet internal cable, so that the length of the control cable is shortened, the interference between signals is reduced, the construction engineering quantity is reduced, and the operation accuracy is improved.
Furthermore, the 660V/400V dry-type transformer is installed at the bottom of the 660V low-voltage switch cabinet, and the 660V/400V dry-type transformer is installed in the 660V low-voltage switch cabinet, so that the space occupied by the transformer is saved.
The beneficial effects of the utility model reside in that:
the utility model discloses a 660V main motor and supporting 380V 220V auxiliary engine power all draw from the 660V low-voltage switchgear after the integration, compare with traditional power supply mode and power supply system, the utility model discloses simpler, safe, reliable. Power cables, control cables and the like led to a 660V main motor and 380V/220V auxiliary machines matched with the main motor and the auxiliary machines are led out from the 660V low-voltage switch cabinet on the same side, so that the field construction is facilitated, and the workload of operation and maintenance in the production process can be reduced.
The utility model discloses be transformed into 660V low tension switchgear inside cable with the control cable between 660V low tension switchgear and the 380V low tension switchgear, not only shortened control cable's length, reduced the interference between the signal, still reduced the construction work volume, increased the accuracy of operation.
The utility model discloses compare with traditional power supply mode and power supply system, can also save equipment cost, convenient operation, save the space of electric substation, reduce the civil engineering cost, shorten construction period. The small special transformer is arranged in the 660V low-voltage switch cabinet, so that the space occupied by the transformer is saved; the number of low-voltage switch cabinets of 380V is reduced by about one half, and the occupied space of the low-voltage switch cabinets is saved. The actual required low voltage distribution room size can be reduced by about half. The more 660V variable frequency motors with 380V/220V auxiliary machines, the more space is saved, and the more investment is saved.
Drawings
Fig. 1 is a system diagram of a 660V low-voltage switchgear according to an embodiment of the present invention;
fig. 2 is an installation diagram of a 660V low-voltage switchgear apparatus according to an embodiment of the present invention;
reference numerals:
QF is a low-voltage circuit breaker, KM is a contactor, KH is a thermal relay, and M is a motor; 1 is 660/400V dry-type transformer, 2 is 660V main motor circuit breaker, 3 is 380V auxiliary motor circuit breaker, 4 is 380V auxiliary motor circuit breaker, 5 is 220V electric heater circuit breaker, 6 ~ 8 are contactors, 9 ~ 10 are thermal relay, 11 ~ 12 are isolator, 13 is meter and pilot lamp.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, the embodiments of the present invention will be described. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a 660V main motor and supporting power supply system who assists machine thereof, including 660V 400V dry-type transformer, 660V main motor, 380V auxiliary engine and 220V auxiliary engine, the power supply of 660V 400V dry-type transformer, 660V main motor, 380V auxiliary engine and 220V auxiliary engine, control circuit integration are in one side 660V low-voltage switchgear. The high-voltage side voltage of the 660V/400V dry-type transformer is 660V, the low-voltage side voltage is 400V, and a 380V auxiliary machine and a 220V auxiliary machine are connected to the low-voltage side of the 660V/400V dry-type transformer.
In the utility model discloses a preferred embodiment, main motor is 660V, 500kW inverter motor, and 380V auxiliary engine is 2 three-phase 380V, 3kW auxiliary motor, and 220V auxiliary engine is 1 single-phase 220V, 0.8kW space heater, the capacity S of 660V/400V dry-type transformerNThe calculation is as follows:
it was calculated that the capacity of the 660V/400V dry transformer should be chosen to be 15 kVA. And the 15kVA transformer is arranged at the bottom of the 660V low-voltage switch cabinet.
The 660V main motor is linked with auxiliary motors such as an oil pump motor, a fan, a space heater and the like in a control mode. The power supply system changes the control cable between the 660V low-voltage switch cabinet and the 380V low-voltage switch cabinet into the 660V low-voltage switch cabinet internal cable, so that the length of the control cable is shortened, the interference between signals is reduced, the construction engineering quantity is reduced, and the operation accuracy is improved.
660V main motor and supporting 380V 220V auxiliary engine power all draw from the 660V low-voltage switchgear after the integration, compare with traditional power supply mode and power supply system, this power supply system is simpler, safe, reliable.
Power cables, control cables and the like led to a 660V main motor and 380V/220V auxiliary machines matched with the main motor and the auxiliary machines are led out from the 660V low-voltage switch cabinet on the same side, so that the field construction is facilitated, and the workload of operation and maintenance in the production process can be reduced.
Compared with the traditional power supply mode and the traditional power supply system, the power supply system can also save equipment cost, is convenient to operate, saves the space of a substation, reduces civil engineering cost and shortens the construction period. The power supply system has the advantages that the small special transformer is arranged in the 660V low-voltage switch cabinet, so that the space occupied by the transformer is saved; the number of low-voltage switch cabinets of 380V is reduced by about one half, and the occupied space of the low-voltage switch cabinets is saved. The actual required low voltage distribution room size can be reduced by about half. The more 660V variable frequency motors with 380V/220V auxiliary machines, the more space is saved, and the more investment is saved. The power supply system reduces the installation of 380V section transformers and low-voltage cabinets, the control cable between the 660V main motor and the 380V/220V auxiliary motor is changed into the internal cable of the 660V switch cabinet, cables, wiring and debugging among cabinets are not required to be laid by a construction unit, the construction period is obviously shortened, and the economic benefit is obvious.
Fig. 1 shows a primary system diagram of a 660V low-voltage switch cabinet of the present embodiment, and the electrical load includes a 660V main motor, two 380V auxiliary motors, and a 220V heater.
Referring to fig. 2, the 660V low-voltage switchgear of the present embodiment is installed with an 660/400V dry-type transformer 1, a 660/400V dry-type transformer 1 is installed at the bottom of the switchgear, the high-voltage side voltage of the 660/400V dry-type transformer 1 is 660V, the low-voltage side voltage is 400V, and 380V auxiliary machines and a 220V heater power supply are connected to the low-voltage side of the 660/400V dry-type transformer 1.
The control and protection of the 660V main motor are realized by a 660V main motor breaker 2 and other matched elements, the control and protection of the two 380V auxiliary motors are realized by 380V auxiliary motor breakers 3-4, contactors 6-7 and thermal relays 9-10 together, and the control and protection of the 220V electric heater are realized by a 380V auxiliary motor breaker 5 and a contactor 8 together. The current, voltage, power display, status display and the like of each electric device such as the 660V main motor, the 380V auxiliary machine and the 220V heater are realized by a meter and an indicator lamp 13. The isolating switches 11-12 are used for connecting or disconnecting a power supply of the 660V low-voltage switch cabinet and can ensure the safety of electrical equipment in the 660V low-voltage switch cabinet during maintenance.
In the embodiment, a special 660V/400V small-sized dry-type transformer is integrated with power supply of a 660V main motor, power supply of a 380V/220V auxiliary machine and a control circuit thereof in a 660V low-voltage switch cabinet. The 660V main motor, the 380V auxiliary machine and the 220V heater are connected with the 660V low-voltage switch cabinet, the 660V main motor, the 380V auxiliary machine and the 220V heater are connected with the 660V low-voltage switch cabinet through the 660V low-voltage switch cabinet, and the 660V low-voltage switch cabinet is connected with the 660V low-voltage switch cabinet through the control cable.
To sum up, the utility model discloses can save equipment cost, convenient operation, improve the reliability of power supply, save the space of electric substation, reduce the civil engineering cost, shorten construction period, the utility model discloses a complete set power supply equipment can fully adapt to various engineering and use.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the present invention is directed must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either a wired or wireless connection.
Claims (9)
1. A660V main motor and a power supply system of a matched auxiliary machine thereof are characterized by comprising a 660V/400V dry-type transformer, a 660V main motor, a 380V auxiliary machine and a 220V auxiliary machine, wherein power supply and control loops of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machine and the 220V auxiliary machine are integrated in a 660V low-voltage switch cabinet on one surface; the high-voltage side voltage of the 660V/400V dry-type transformer is 660V, the low-voltage side voltage of the 660V/400V dry-type transformer is 400V, and the 380V auxiliary machine and the 220V auxiliary machine are connected to the low-voltage side of the 660V/400V dry-type transformer.
2. The power supply system of the 660V main motor and the auxiliary machines thereof as claimed in claim 1, further comprising a first circuit breaker for controlling and protecting the 660V/400V dry transformer.
3. The power supply system of the 660V main motor and the auxiliary machines matched with the main motor according to claim 1, further comprising a second circuit breaker, a second contactor and a second thermal relay, wherein the second circuit breaker, the second contactor and the second thermal relay are used for jointly realizing control and protection of the 380V auxiliary machines.
4. The power supply system of the 660V main motor and the auxiliary machines matched with the 660V main motor according to claim 1, further comprising a third circuit breaker and a third contactor, wherein the third circuit breaker and the third contactor are used for jointly realizing control and protection of the 220V auxiliary machine.
5. The power supply system of the 660V main motor and the auxiliary machines matched with the main motor as claimed in claim 1, further comprising a meter and an indicator light for displaying the current, the voltage, the power and the state of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machine and the 220V auxiliary machine.
6. The power supply system of the 660V main motor and the auxiliary machines thereof as claimed in claim 1, further comprising an isolating switch for connecting or disconnecting the power supply of the 660V low-voltage switch cabinet to ensure the safety of the 660V low-voltage switch cabinet during the maintenance of the electrical equipment.
7. A power supply system for a 660V main motor and auxiliary machines matched with the main motor as claimed in any one of claims 1 to 6, wherein power cables and control cables of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machine and the 220V auxiliary machine are led out from the 660V low-voltage switch cabinet to electric equipment.
8. The power supply system of the 660V main motor and the auxiliary machines matched with the main motor as claimed in claim 7, wherein the control cables of the 660V/400V dry-type transformer, the 660V main motor, the 380V auxiliary machines and the 220V auxiliary machines are internal cables of the 660V low-voltage switch cabinet.
9. A660V main motor and auxiliary machine power supply system according to any one of claims 1-6, characterized in that the 660V/400V dry transformer is installed at the bottom of the 660V low-voltage switch cabinet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023017527.5U CN214013871U (en) | 2020-12-15 | 2020-12-15 | 660V main motor and power supply system of auxiliary machine matched with same |
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| CN202023017527.5U CN214013871U (en) | 2020-12-15 | 2020-12-15 | 660V main motor and power supply system of auxiliary machine matched with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188949A (en) * | 2022-02-17 | 2022-03-15 | 中铁第六勘察设计院集团有限公司 | Low-voltage power distribution system for highway extra-long tunnel |
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2020
- 2020-12-15 CN CN202023017527.5U patent/CN214013871U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188949A (en) * | 2022-02-17 | 2022-03-15 | 中铁第六勘察设计院集团有限公司 | Low-voltage power distribution system for highway extra-long tunnel |
| CN114188949B (en) * | 2022-02-17 | 2022-04-12 | 中铁第六勘察设计院集团有限公司 | Low-voltage power distribution system for highway extra-long tunnel |
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