CN202134951U - Low pressure loop control equipment of high pressure frequency converter - Google Patents
Low pressure loop control equipment of high pressure frequency converter Download PDFInfo
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- CN202134951U CN202134951U CN201120220952U CN201120220952U CN202134951U CN 202134951 U CN202134951 U CN 202134951U CN 201120220952 U CN201120220952 U CN 201120220952U CN 201120220952 U CN201120220952 U CN 201120220952U CN 202134951 U CN202134951 U CN 202134951U
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- power supply
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- high voltage
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Abstract
The utility model discloses low pressure loop control equipment of a high pressure frequency converter, comprising a master control power supply, a stand-by power supply and a contactor apparatus of single-phase and mechanical interlock type. The contactor apparatus of single-phase and mechanical interlock type comprises a first contactor, a second contactor and a mechanical interlock unit; the master control power supply and the stand-by power supply are respectively connected with an input end of the first contactor and an input end of the second contactor; and the mechanical interlock unit is arranged between the first contactor and the second contactor. According to the utility model, a switching apparatus of dual supply adopts the contactor apparatus of single-phase and mechanical interlock type, so that reliability of dual supply switching is guaranteed; the low pressure loop control equipment system of a high pressure frequency converter optimizes wiring of a frequency converter control circuit; and because power systems of power supply of a dual supply 220VAC control circuit, a cabinet blower fan of a high pressure frequency converter and a blower fan of a transformer body are separated, capacity requirement of a frequency converter master control power supply is substantially reduced by the scheme, and on-site wiring cost is reduced.
Description
Technical field
The utility model belongs to high voltage converter control loop power supply technique field, refers in particular to a kind of low tension loop control appliance of high voltage converter.
Background technology
Along with the development of power electronic technology, frequency converter is as the development product of power electronic technology, plays an important role in the every field of national economy.Inverter Application is especially favored in every field such as electric power, metallurgy, petrochemical industry, mine, oil field, water supply widely.
The effect of low-tension supply control loop system is to the control section of high voltage converter before startup and the load device power supply of part.Low-tension supply control loop system is general main to be made up of several major parts, control power unit and low pressure winding fan power part, load device part; Said control power unit is made up of double-power supply loop, double-power supply switching device, UPS, filter etc., and said low pressure winding fan power partly has transformer; Load device partly comprises transformer body blower fan, transformer case cabinet unit, power cabinet cabinet unit, switch cubicle etc. against the wind against the wind.The master control power supply that double-power supply loop inserted is generally 380VAC (three-phase four-wire system), under the usual condition, uses this master control power supply.The 380V power supply that stand-by power supply is drawn for step down side in high voltage converter when the master control power supply breaks down, just adopts this stand-by power supply.
Master control power supply and stand-by power supply are through double-power supply switching device or realize handover operation through the contactor of two electrical interlockses.Adopt the duplicate supply handover scheme of above device, its shortcoming is: the cost of double-power supply switching device is high, and volume is big; Adopt the contactor of electrical interlocks to realize its poor reliability of duplicate supply device for switching, job insecurity.
The utility model content
In view of this, the utility model provides a kind of low tension loop control appliance of high voltage converter, to solve the problem of above-mentioned expensive, poor reliability.
For addressing the above problem, the low tension loop control appliance of a kind of high voltage converter of the utility model adopts following technical scheme:
A kind of low tension loop control appliance of high voltage converter comprises master control power supply, stand-by power supply, single-phase mechanical interlocked contactor device; Said single-phase mechanical interlocked contactor device comprises first contactor, second contactor and mechanical interlocked unit; Said master control power supply, stand-by power supply connect the input of first single contactor, the input of second contactor respectively; Said mechanical interlocked unit is between first contactor and second contactor.
The output of the output of first contactor and second contactor is connected switch cubicle, uninterrupted power supply UPS, filter and control cubicle.
Said master control power supply is the outer 220VAC single phase poaer supply that inserts; Said stand-by power supply is the A phase in the 380VAC three phase mains of drawing separately of the step down side in the high voltage converter.
Said three phase mains also connects fans load.
Said fans load comprises the cabinet cabinet unit against the wind of unit and power cabinet against the wind of back exhaust blower, the transformer of preceding exhaust blower, the transformer of transformer.
Exhaust blower inserts the B phase in the said three phase mains separately before said, and said back exhaust blower inserts the C phase in the said three phase mains separately.
The cabinet of said transformer against the wind unit and power cabinet cabinet against the wind unit insert the three-phase of transformer low voltage winding 380V in the parallel connection back separately.
The cabinet of the preceding exhaust blower of said three phase mains and said transformer, the back exhaust blower of transformer, the transformer cabinet of unit and power cabinet against the wind also is connected with control switch against the wind between the unit.
Compared with prior art; The utlity model has following advantage: the low tension loop control appliance of a kind of high voltage converter of the utility model; What the switching device shifter of duplicate supply adopted in this high voltage converter low-voltage control circuit control appliance is mechanical interlocked contactor device, thereby has guaranteed the reliability that duplicate supply switches; This high voltage converter low tension loop control appliance system optimization the wiring in Frequency Converter Control loop; Separate because of the powersupply system of duplicate supply 220VAC control loop with high voltage converter cabinet blower fan, transformer body blower fan again, this scheme greatly reduces the capacity requirement to frequency converter master control power supply, thereby reduces the field wiring cost.A phase and the N of step down side 380VAC make the frequency converter back-up source; Other two phases and N are that the forward and backward exhaust blower of transformer body is supplied power respectively; Can make the three phase winding load balances of step down side 380VAC so as far as possible; Thereby reduce the transformer loss that causes because of laod unbalance, also avoided the three characteristics of the middle term uneven and reduce the frequency converter cabinet operational efficiency of machine against the wind.
Description of drawings
Fig. 1 is the utility model embodiment mesolow circuit controls equipment structure chart.
Embodiment
For clearly demonstrating the technical scheme of the utility model, provide preferred embodiment below and be described with reference to the accompanying drawings.
Referring to Fig. 1; Fig. 1 is the utility model embodiment mesolow circuit controls equipment structure chart; This low tension loop control appliance mainly comprises control power unit, transformer low voltage winding power unit and loading section, wherein controls power unit and is made up of master control power supply, stand-by power supply, single-phase mechanical interlocked contactor device, UPS, filter; The 380VAC power supply that transformer low voltage winding power unit is drawn for step down side in frequency converter; Loading section comprises transformer body blower fan, transformer case cabinet machine, power cabinet cabinet machine, switch cubicle etc. against the wind against the wind.Above-mentioned double-power supply loop is mainly used in to switch cubicle, control cubicle power supply.Above-mentioned transformer low voltage winding power supply is given the stand-by power supply power supply of double-power supply loop, gives machine, the power cabinet cabinet machine power supply against the wind against the wind of transformer body blower fan and frequency converter cabinet cabinet simultaneously.The master control power supply is the outer 220VAC single phase poaer supply that inserts, and the 380VAC A phase power supply that stand-by power supply is drawn for step down side in frequency converter under normal circumstances, adopts the master control power supply that system is supplied power.Master control power supply, stand-by power supply respectively connect contactor KM1, the KM2 of single-phase mechanical interlocked contactor device; Be used to carry out the switching between the duplicate supply; Master control power contactor KM1 top meets high voltage converter master control power supply 220VAC, and stand-by power supply contactor KM2 top meets phase of the A among the step down side 380VAC and N in the high voltage converter.Connect a mechanical interlocked unit between contactor KM1, the KM2, make and have only one tunnel work among contactor KM1, the KM2; Double-power supply loop is drawn the power supply of an end 220VAC as the high voltage converter switch cubicle after double-power supply switching device KM1, KM2 handle; Draw an end simultaneously and connect the UPS input; After treatment; The UPS output is received the filter in the low-tension supply control loop system, and wherein filter can be the combination of components and parts such as filter, impulse train TVS, and the output of filter is drawn one road 220VAC and offered the high voltage converter control cubicle; Simultaneously also for the required 220VAC components and parts of other cabinets power supply is provided, the 220VAC electric power system can satisfy single phase poaer supply demand in the high voltage converter cabinet like this.The A of step down side 380V winding phase and N are mainly frequency converter in the high voltage converter provides subsequent use 220VAC power supply; Transformer body blower fan is 6, and front and rear row is divided equally two groups, and with the two ends parallel connection separately of every group of blower fan, what be connected to 380V low pressure winding wherein two goes up B phase and N, C phase and N mutually.Simultaneously step down side 380V winding be high voltage converter transformer case against the wind unit, power cabinet cabinet against the wind unit power supply is provided.
This high voltage converter low tension loop control appliance system optimization the wiring in Frequency Converter Control loop; Again because because the powersupply system of duplicate supply 220VAC control loop and high voltage converter cabinet blower fan, transformer body blower fan separates, and this scheme greatly reduces the capacity requirement to frequency converter master control power supply, thus reduction field wiring cost.A phase and the N of step down side 380VAC make the frequency converter back-up source; Other two phases and N are that the forward and backward exhaust blower of transformer body is supplied power respectively; Can make the three phase winding load balances of step down side 380VAC so as far as possible; Thereby reduce the transformer loss that causes because of laod unbalance, also avoided the three characteristics of the middle term uneven and reduce the frequency converter cabinet operational efficiency of machine against the wind.Simultaneously, what the switching device shifter of duplicate supply adopted in this high voltage converter low-voltage control circuit system is mechanical interlocked contactor, thereby has guaranteed the reliability that duplicate supply switches.
For the device of being set forth among each embodiment of the utility model, all within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (8)
1. the low tension loop control appliance of a high voltage converter is characterized in that, comprises master control power supply, stand-by power supply, single-phase mechanical interlocked contactor device; Said single-phase mechanical interlocked contactor device comprises first contactor (KM1), second contactor (KM2) and mechanical interlocked unit; Said master control power supply, stand-by power supply connect the input of first single contactor (KM1), the input of second contactor (KM2) respectively; Said mechanical interlocked unit is positioned between first contactor (KM1) and second contactor (KM2).
2. the low tension loop control appliance of high voltage converter according to claim 1 is characterized in that, the output of the output of first contactor (KM1) and second contactor (KM2) is connected with switch cubicle, uninterrupted power supply UPS, filter and control cubicle.
3. the low tension loop control appliance of high voltage converter according to claim 2 is characterized in that, said master control power supply is the outer 220VAC single phase poaer supply that inserts; Said stand-by power supply is the A phase in the 380VAC three phase mains of drawing separately of the step down side in the high voltage converter.
4. the low tension loop control appliance of high voltage converter according to claim 3 is characterized in that, said three phase mains also connects fans load.
5. the low tension loop control appliance of high voltage converter according to claim 4 is characterized in that, said fans load comprises the cabinet cabinet unit against the wind of unit and power cabinet against the wind of back exhaust blower, the transformer of preceding exhaust blower, the transformer of transformer.
6. the low tension loop control appliance of high voltage converter according to claim 5 is characterized in that, said preceding exhaust blower inserts the B phase in the said three phase mains separately, the C phase in the said three phase mains of the independent access of said back exhaust blower.
7. the low tension loop control appliance of high voltage converter according to claim 6 is characterized in that, the cabinet of said transformer against the wind unit and power cabinet cabinet against the wind unit insert the three-phase of transformer low voltage winding 380V in the parallel connection back separately.
8. the low tension loop control appliance of high voltage converter according to claim 5; It is characterized in that the cabinet of the preceding exhaust blower of said three phase mains and said transformer, the back exhaust blower of transformer, the transformer cabinet of unit and power cabinet against the wind also is connected with control switch against the wind between the unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220952U CN202134951U (en) | 2011-06-27 | 2011-06-27 | Low pressure loop control equipment of high pressure frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220952U CN202134951U (en) | 2011-06-27 | 2011-06-27 | Low pressure loop control equipment of high pressure frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202134951U true CN202134951U (en) | 2012-02-01 |
Family
ID=45523708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120220952U Expired - Fee Related CN202134951U (en) | 2011-06-27 | 2011-06-27 | Low pressure loop control equipment of high pressure frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202134951U (en) |
-
2011
- 2011-06-27 CN CN201120220952U patent/CN202134951U/en not_active Expired - Fee Related
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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: 20120201 Termination date: 20200627 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |