CN205945017U - Under -voltage protection circuit and start -up cabinet - Google Patents
Under -voltage protection circuit and start -up cabinet Download PDFInfo
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- CN205945017U CN205945017U CN201620795137.5U CN201620795137U CN205945017U CN 205945017 U CN205945017 U CN 205945017U CN 201620795137 U CN201620795137 U CN 201620795137U CN 205945017 U CN205945017 U CN 205945017U
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- protection circuit
- source
- power supply
- energy storage
- coil
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/025—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being a power interruption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0207—Lubrication with lubrication control systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/16—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P4/00—Arrangements specially adapted for regulating or controlling the speed or torque of electric motors that can be connected to two or more different electric power supplies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Protection Of Static Devices (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model provides an under -voltage protection circuit and start -up cabinet. The under -voltage protection circuit is used for controlling first power according to the running state of second source, including decompression coil protection circuit and energy storage protection circuit to be coupled between first power and second source, when the decompression appeared in the second source, decompression coil protection circuit or energy storage protection circuit mutual independence ground stopped first power. It includes to start the cabinet: to the first power of compressor power supply, to the second source and the under -voltage protection circuit of oil pump power supply. The utility model discloses an under -voltage protection circuit and start -up cabinet can play duplicate protection's effect to the compressor: promptly, when decompression trip coil was out of order, energy memory discharged to the separating brake coil, made breaker open operation, cut off first power, had avoided the problem that the compressor moved under the environment of unlubricated oil.
Description
Technical field
This utility model is related to a kind of o-volt protection circuit and the startup cabinet of motor start-up, particularly to a kind of for sky
Adjust the o-volt protection circuit of motor start-up and the startup cabinet of unit.
Background technology
In existing air conditioning unit startup cabinet, such as air conditioning unit middle pressure starts cabinet, grease pump or oil pump power supply and pressure
Contracting owner's power supply is separate two-way power supply.Between two-way power supply, the general coil without tension by startup cabinet ensures compressor
Safe operation, that is, guarantee oil pump power supply when decompression (power supply stops or blood pressure lowering is excessive), o-volt protection circuit stops compression owner
Power supply is so that compressor will not run in the environment of non lubricant oil.
And existing air conditioning unit middle pressure start cabinet in, once coil without tension break down or lost efficacy it is possible to
When oil pump power outage or decompression, compressor main power source is still running, and compressor so can be led to be in operation because of non lubricant oil
And it is stuck.
It is therefore desirable to providing a kind of improved o-volt protection circuit and starting cabinet, though break down because of coil without tension or
Lost efficacy and lead to oil pump power outage or decompression, compressor main power source also can be turned off, thus play duplicate protection effect and
Effect, preferably avoids the problem that compressor continues to run with the environment of non lubricant oil.
Utility model content
In order to overcome weak point of the prior art, this utility model provides a kind of o-volt protection circuit, for root
Running status according to second source to control the first power supply, including：
Coil without tension protection circuit；With
Energy storage protection circuit；
Described o-volt protection circuit is coupled between described first power supply and second source；
When decompression in described second source, described coil without tension protection circuit or energy storage protection circuit are independently of each other
Stop described first power supply.
O-volt protection circuit as described above, also includes：
Control device, for controlling energy storage protection circuit；
Described energy storage protection circuit includes discharge loop, and described control device is connected with described discharge loop；
When described second source is in normal condition, described discharge loop is disconnected by described control device；
When described second source is in malfunction, described discharge loop is connected by described control device.
O-volt protection circuit as above, described energy storage protection circuit is entered to breaker open operation coil by discharge loop
Row electric discharge, described energy storage protection circuit is used for stopping described first power supply to the discharge current of described breaker open operation coil.
O-volt protection circuit as above, is provided with chopper in the electric power loop of described first power supply, described second
During power failure, described coil without tension protection circuit and energy storage protection circuit make described breaker open operation；Described separating brake
Coil is arranged in described chopper.
O-volt protection circuit as above it is characterised in that：
Described energy storage protection circuit is connected in parallel to the two ends of described switching winding.
O-volt protection circuit as above, described first power supply being controlled by described o-volt protection circuit supplies to compressor
Electricity；The described second source being coupled with described o-volt protection circuit is powered to oil pump；
When second source is in malfunction, described o-volt protection circuit disconnects the electricity between compressor and the first power supply
Resource loop.
In order to overcome weak point of the prior art, this utility model also provides a kind of startup cabinet, including：
First power supply, described first power supply is powered to compressor；
Second source, described second source is powered to oil pump；
O-volt protection circuit, is coupled between described first power supply and second source, for breaking down in second source
When, stop the first power supply；
It is characterized in that described o-volt protection circuit includes：
Coil without tension protection circuit；With
Energy storage protection circuit；
When described second source breaks down, described coil without tension protection circuit or energy storage protection circuit are independently of each other
Stop the first power supply.
The cabinet that starts as above is it is characterised in that described o-volt protection circuit also includes：
Control device, for controlling energy storage protection circuit；
Described energy storage protection circuit includes charge circuit and discharge loop, and described control device is with described discharge loop even
Connect；
When described second source is in normal condition, described discharge loop is disconnected by described control device；
When described second source is in malfunction, described discharge loop is connected by described control device.
As above start cabinet it is characterised in that：
Described energy storage protection circuit is discharged to breaker open operation coil, and described energy storage protection circuit is to described chopper
The discharge current of switching winding is used for stopping the first power supply.
As above start cabinet it is characterised in that：
It is provided with chopper in the electric power loop of described first power supply；
When second source breaks down, described coil without tension protection circuit and energy storage protection circuit make described chopper
Separating brake；
Described switching winding is arranged in described chopper, and described energy storage protection circuit is connected in parallel to described separating brake line
The two ends of circle.
For existing o-volt protection circuit with the technical problem that starts cabinet, this utility model by o-volt protection circuit and
Start improvement and the optimization design of cabinet, o-volt protection circuit innovatively increases energy storage device and charge control and electric discharge control
System is so that after second source breaks down, one side chopper no-voltage trip coil understands action, another aspect energy storage device
The switching winding of chopper or vacuum circuit breaker can be discharged, make breaker open operation, cut off the first power supply.This utility model
Efficiently utilize the switching winding of chopper so that do not change or very little change existing o-volt protection circuit in the case of,
Add energy storage device.In this utility model, when for compressor, second source is used for oil pump to the first power supply, this practicality is new
The o-volt protection circuit of type can play the effect of duplicate protection with starting cabinet to compressor：That is, it is out of order in no-voltage trip coil
When, energy storage device discharges to switching winding, makes breaker open operation, cut off the first power supply, it is to avoid compressor is unlubricated
The problem run under the environment of oil.
Brief description
Read described further below referring to the drawings, feature and advantage of the present utility model can be better understood, whole
In accompanying drawing, identical reference represents identical parts, wherein：
Fig. 1 is the air conditioning unit 100 schematic structure charts of this utility model；
Fig. 2A is the schematic structure chart of this utility model o-volt protection circuit 108；
Fig. 2 B is the more detailed schematic diagram of this utility model energy storage protection circuit 202；
Fig. 2 C is the more detailed schematic diagram of this utility model coil without tension protection circuit 204；
Fig. 3 A-C is relay 302,304 He that can be used in the o-volt protection circuit 108 shown in this utility model Fig. 1
306；
Fig. 4 is the structure chart of this utility model 108 1 illustrative examples of o-volt protection circuit.
Specific embodiment
Although this utility model has allowed various forms of embodiments, shown in the drawings and be described below
One or more embodiments, and it should be appreciated that this utility model disclosure is to be considered only as illustrative and is not intended to
The disclosure is limited to any specific embodiment disclosed in this utility model.In figures in the following, same parts make
With same drawing reference numeral, similar parts use similar drawing reference numeral, to avoid repeated description.
Fig. 1 is the air conditioning unit 100 schematic structure charts of this utility model.As shown in figure 1, air conditioning unit 100 include opening
Dynamic cabinet 102, compressor 112 and oil pump 114.Start and there is in cabinet 102 the separate power supply output 105,107 of two-way, respectively to pressure
Contracting machine 112 and oil pump 114 are powered.When air conditioning unit 100 run, oil pump 114 continuously provides lubrication to compressor 112
Oil.
Or as shown in figure 1, start cabinet 102 to include two the first separate power supplys 104 and second source 106 and decompression
Protection circuit 108.Specifically, the first power supply 104 can adopt alternating current 10000V, by power supply output 105 to compressor 112
Power supply；Second source 106 can adopt alternating current 110V or 220V, is powered to oil pump 114 by power supply output 107；O-volt protection
Circuit 108 connects or is coupled between the first power supply 104 and second source 106.By connect 117, o-volt protection circuit 108 from
Second source 106 receives and detects its running status, to determine whether second source 104 is in normal operating condition or is in event
Barrier, for example, have a power failure or decompression state.When second source 104 breaks down, second source 104 passes through to connect 117 to decompression guarantor
Protection circuit 108 provides or feeds back its malfunction；After the malfunction receiving second source 104, o-volt protection circuit 108
Produce dump control signal, 115 dump control signal is transported to the first power supply 104 by connecting, to disconnect the
Electric power loop between one power supply 104 and compressor 112.
Fig. 2A is the schematic structure chart of this utility model o-volt protection circuit 108.As Fig. 2A shows, o-volt protection circuit
108 include energy storage protection circuit 202 and coil without tension protection circuit 204.By connecting 209, coil without tension protection circuit 204 with
Second source 106 is connected so that coil without tension protection circuit 204 can determine whether second source 106 is in normal operation shape
State or be in fault, for example, have a power failure or decompression state.Coil without tension protection circuit 204 includes tripping coil (as Fig. 2 C and Fig. 4
Shown).When second source 106 normally runs it is contemplated that electric current 205 flow through tripping coil from connecting, sufficiently large to produce
Electromagnetic force go to connect killer switch contact in electric power loop between power supply 1 and compressor 112 so that the first power supply 104 with
Form electric power loop, the first power supply 104 accesses compressor 112 between compressor 112.Have a power failure or during decompression in second source 106,
Current vanishes in tripping coil or reduction, lead to lose electromagnetic force or electromagnetic force is not enough, thus disconnect the first power supply 104 with
Killer switch contact in electric power loop between compressor 112 is so that power supply between the first power supply 104 and compressor 112
Loop disconnects.
Similarly, by connecting 207, energy storage protection circuit 202 is connected with second source 106, and second source 106 is normally transported
During row, can charge to energy storage protection circuit 202.Energy storage protection circuit 202 includes energy-storage travelling wave tube for example shown in Fig. 2 B and Fig. 4
Electric capacity, and there is charge circuit and discharge loop.When second source 106 normally runs, filling in energy storage protection circuit 202
The electric loop is switched on and discharge loop is cut off so that energy-storage travelling wave tube can be electrically charged, but can not discharge.In second source 106
When breaking down, the discharge loop in energy storage protection circuit 202 is switched on so that energy-storage travelling wave tube can discharge；The putting of energy-storage travelling wave tube
Electric current is used for disconnecting the killer switch contact in electric power loop between the first power supply 104 and compressor 112.Energy storage is protected
Circuit 202 can be disconnected in electric power loop between the first power supply 104 and compressor 112 by connecting 203 offer discharge currents
Killer switch contact.
Fig. 2 B is the more detailed schematic diagram of this utility model energy storage protection circuit 202.As shown in Figure 2 B, energy storage is protected
Protection circuit 202 includes storage capacitor 222, charge circuit 223, and discharge loop 225, for controlling the electric discharge control of discharge loop 225
Circuit 224 processed, and the discharge load 226 being connected in discharge loop 225, in this utility model, load 226 can be in Fig. 4
Shown breaker open operation coil 405.When second source 106 normally runs, charge/discharge control circuit 224 disconnects discharge loop
225 so that storage capacitor 222 is electrically charged by the input 227,229 of DC source；When second source 106 is out of order, put
Electric control circuit 224 connects discharge loop 225 so that storage capacitor 222 is to load 226 electric discharge；The electric discharge electricity of storage capacitor 222
When circulation overdischarge loads the breaker open operation coil 405 shown in 226 or Fig. 4, discharge load 226 produces excitation magnetic force, from
And disconnect the killer switch contact in the first power supply 104 loop.In this utility model, charge/discharge control circuit 224 and relay
Device 306 (see Fig. 3 C) can be used as the control device being used for control discharge loop 225.
Fig. 2 C is the more detailed schematic diagram of this utility model coil without tension protection circuit 204.As shown in Figure 2 C, lose
Line ball circle protection circuit 204 includes tripping coil 242, and in this utility model, tripping coil 242 can be the mistake shown in Fig. 4
Pressure tripping coil 406.Tripping coil 242 is disposed adjacent with chopper 252 so that the generation of magnetic force, change in tripping coil 242
Change, disappear and chopper 252 can be connected or disconnection action.As shown in Figure 2 C, schematic chopper 252 includes enclosing
Around fixed point (or fixed contact) 253 swing separating brake connecting rod 246, can around fixed point 254 swing moving sheets 244 and fixed contact
248.Bias unit, such as bias spring part (not shown) is applied with a bias force to separating brake connecting rod 246, is not having external force
Effect is lower to pull separating brake connecting rod 246 so that moving sheet 244 is separated with fixed contact 248.When second source 106 normally runs,
Expected alternating current flows into tripping coil 242 by input 245,247, thus tripping coil 242 produces sufficiently large electricity
Magnetic force carrys out drivening rod mechanism (not shown), and linkage, to promote separating brake connecting rod 246, is applied to separating brake connecting rod to overcome
246 bias force, so that moving sheet 244 is contacted with fixed contact 248, connects the electricity between the first power supply 104 and compressor 112
Resource loop.Have a power failure or during decompression in second source 106, by current vanishes or the reduction of tripping coil 242 so that crossing trip line
Circle 242 loses electromagnetic force or electromagnetic force deficiency it is impossible to overcome the bias force being applied on separating brake connecting rod 246, thus bias force moves
Dynamic separating brake connecting rod 246, thus moving sheet 244 is separated with fixed contact 248, disconnects between the first power supply 104 and compressor 112
Electric power loop.In this utility model, in chopper 252, fixed contact 248 and fixed contact 254 may be mounted at the first power supply
In electric power loop between 104 and compressor 112.
It should be noted that energy storage (or discharge and recharge) protection circuit 202 in this utility model and coil without tension protection electricity
Road 204 can mutually parallel, independently work, for when second source 106 is out of order pressure, disconnecting the first power supply 104 and compression
Switch contact in electric power loop between machine 112.
Fig. 3 A-C is to can be used for schematic relay 302 in the o-volt protection circuit 108 shown in this utility model Fig. 1,
304 and 306.
As shown in Figure 3A, relay 302 (1KA) includes exciting bank (having coil) 312, normally closed switch 314 and normally opened
Switch 316.When not having electric current to pass through, exciting bank 312 does not produce electromagnetic force, and normally closed switch 314 is in closure state, and normal
Switch 316 is off.When there being electric current to pass through, exciting bank 312 produces electromagnetic force, and normally closed switch 314 is in disconnected
Open state, and normal open switch 316 is in closure state.
Similar with Fig. 3 A, in figure 3b, relay 304 (2KA) includes exciting bank (having coil) 322, normally closed switch
324 and normal open switch 326.When not having electric current to pass through, exciting bank 322 does not produce electromagnetic force, and normally closed switch 324 is in closure
State, and normal open switch 326 is off.When there being electric current to pass through, exciting bank 322 produces electromagnetic force, normally closed switch
324 are off, and normal open switch 326 is in closure state.
As shown in Figure 3 C, relay 306 (3KA) includes exciting bank (having coil) 332, normally closed switch 334,336 and
Normal open switch 338.When not having electric current to pass through, exciting bank 332 does not produce electromagnetic force, and normally closed switch 334,336 is in closure
State, and normal open switch 338 is off.When there being electric current to pass through, exciting bank 332 produces electromagnetic force, normally closed switch
334th, 336 it is off, and normal open switch 338 is in closure state.
Fig. 4 is the structure chart of the schematic o-volt protection circuit 400 of this utility model one.In the diagram, relay 302
(1KA), 304 (2KA) and 306 (3KA) are as auxiliary reclay；Its repeat circuit 306 (3KA) is used for controlling filling of electric capacity 222
The electric loop and discharge loop.As shown in figure 4, o-volt protection circuit 400 includes charging and discharging circuit 451, sub-gate circuit 452, under-voltage
Dropout loop 453, chopper or vacuum circuit breaker closing circuit 454, chopper or vacuum circuit breaker switching signal path 455 He
Fault output loop 456.Due to the use of control loop power supply 459 being each loop or path offer power supply, charging and discharging circuit
451, sub-gate circuit 452, no-voltage trip loop 453, closing circuit of circuit breaker 454, breaker closing signal path 455 and fault
Output loop 456 is connected in parallel on 2 inputs 422,424 of control loop power supply 459.Control loop power supply 459 and
Two power supplys 106 use identical power input.
As illustrative examples, charging and discharging circuit 451 connects energy storage protection circuit 202 and includes electric capacity 222, complete
Wave filter 430, energy storage protection circuit display lamp 426, energy storage protection circuit testing button 428 and relay 306 (3KA).Point
Lock loop 452 includes breaker open operation coil 405, switch QF-BB2 and the normal open switch 326 being connected in series；Undervoltage tripping returns
Road 453 includes no-voltage trip coil 406；Closing circuit of circuit breaker 454 includes the breaker closing coil 407 being connected in series
With normal open switch 316；Breaker closing signal path 455 includes exciting bank 312, normally closed switch 324 and being connected in series
Enabling signal unit 403；Fault output loop 456 includes the exciting bank 322 being connected in series and fault output unit 404.
In energy storage protection circuit 202, the alternating current power supply that control loop power supply 459 provides is become by all wave filter 430
DC source, for charging to electric capacity 222.When pressing energy storage protection circuit testing button 428, energy storage protection circuit display lamp
426 electrified light emittings, instruction energy storage protection circuit 202 works；When decontroling energy storage protection circuit testing button 428, energy storage is protected
Circuit indicator 426 and power supply disconnect, and circuit indicator 426 does not light.In this utility model, energy storage protection circuit 202 is led to
Overdischarge controlling organization is selectively connected to (including relay 306) two ends of breaker open operation coil 405；I.e.：(1) exist
When needing, be connected to the two ends of breaker open operation coil 405, breaker open operation coil 405 discharged, (2) and be not required to
When wanting, disconnect with breaker open operation coil 405, do not affect breaker open operation coil 405 and work.And because and second source
106 are connected, and the exciting bank 332 in relay 306 (3KA) can detect the decompression state of second source 106.
Now describe in the case of the first power supply 104 and second source 106 normal operation, 3 relays 302 (1KA),
304 (2KA), 306 (3KA) switch working state are as follows：
(1) exciting bank 312 in relay 302 (1KA) be electricity condition because closing circuit of circuit breaker 454 in opening
Dynamic signal 403 is effective status or connected state, and now normally closed switch 314 disconnects and normal open switch 316 closes；
(2) exciting bank 322 in relay 304 (2KA) is power failure state because fault output signal 404 is invalid shape
State or off-state, now normally closed switch 324 close and normal open switch 326 disconnect (assume air conditioning unit 100 do not have any therefore
Barrier)；
(3) exciting bank 332 in relay 306 (3KA) be electricity condition, now normally closed switch 334,336 disconnect and
Normal open switch 338 closes；
So, in the case of the first power supply 104 and second source 106 normal operation, control loop power supply 459 passes through electricity
Power filter 430 is charged to storage capacitor 222；But, because normally closed switch 334,336 disconnects, in storage capacitor 222
There is no discharge path, o-volt protection circuit 400 will not be made to produce misoperation.Now, control loop power supply 459 passes through power supply
Input 422,424 is applied in no-voltage trip coil 406, applies prospective current in no-voltage trip coil 406, thus decompression takes off
Fastening wire circle 406 produces sufficiently large electromagnetic force, drives the separating brake connecting rod 246 in the chopper 252 on the first power supply 104 loop
(not shown in Fig. 4, can be found in Fig. 2 C), overcomes the bias force on separating brake connecting rod, makes breaker closing, so that the first power supply
104 are switched on compressor 112.
QF-BB2 is the auxiliary switch in chopper.Situation in the first power supply 104 and second source 106 normal operation
Under, auxiliary switch QF-BB2 is switched closure by the electromagnetic force in no-voltage trip coil 406；But sub-gate circuit 452 is not turned on, because
Normal open switch 326 for relay 304 (2KA) is off, and breaker open operation coil 405 does not have electric current to pass through, will not
Start the separating brake action of chopper.But, when fault output unit 404 is activated or connects for example air conditioning unit 100, event occurs
Barrier：Excessively stream occurs in air conditioning unit 100 certain circuit, exciting bank 322 from power failure state become electricity condition so that excitation dress
Put 322 generation electromagnetic forces, the off-state of normal open switch 326 is become closure state, further such that having electric current from chopper
Switching winding 405 passes through, so that breaker open operation coil 405 produces electromagnetic force, drives the separating brake connecting rod in chopper 252
246 make the above chopper 252 separating brake, stop the first power supply 104.However, the first power supply 104 and second source 106 run
In the case of normal, because normally closed switch 334,336 disconnects, storage capacitor 222 will not discharge to breaker open operation coil 405,
O-volt protection circuit 400 will not be made to produce misoperation.
Now describe after the first power supply 104 and second source 106 normally run a period of time, event in second source 106
Barrier, such as in the case of suddenly becoming no-voltage or voltage overshoot reduction, and in tripping coil 406 normal work, decompression is protected
The o-volt protection operating process of protection circuit 400, as follows：
(1) second source 106 runs the such as second source 106 that breaks down and suddenly becomes no-voltage or voltage overshoot fall
Low；
(2) current vanishes in no-voltage trip coil 406 or reduction, thus no-voltage trip coil 406 can not produce electromagnetism
Power or sufficiently large electromagnetism can not be produced to overcome the bias force on separating brake connecting rod 2 in the above chopper, so bias force
Make breaker open operation, thus the first power supply 104 is broken from the current supply circuit of compressor 112；
(3) current vanishes of relay 306 (3KA) or reduction, makes normally closed switch 334,336 become closure from off-state
State, electric capacity discharge loop is switched on, so that storage capacitor 222 is charged to breaker open operation coil 405.Chopper
Produce electromagnetic force in switching winding 405, drive the separating brake connecting rod in chopper to make the above breaker open operation, stop power supply 1.
In this utility model, under conditions of no-voltage trip coil 406 normal work, second source 106 goes out in running
Existing fault, for example, suddenly become no-voltage or in the case that voltage overshoot reduces, no-voltage trip coil 406 and storage capacitor 222
Simultaneously, function independently, make above-mentioned breaker open operation.
Now describe after the first power supply 104 and second source 106 normally run a period of time, during second source 106 runs
Break down, such as in the case of suddenly becoming no-voltage or voltage overshoot reduction, and can not be just in no-voltage trip coil 406
When often working or losing efficacy, the o-volt protection operating process of o-volt protection circuit 400, as follows：
(1) second source 106 runs and breaks down, for example, suddenly become no-voltage or voltage overshoot reduces, oil pump 114 stops
Only work；
(2) no-voltage trip coil 406 lost efficacy, to suddenly become no-voltage or voltage overshoot reduce reactionless, thus can not
One power supply 104 is broken from the current supply circuit of compressor 112；
(3) current vanishes of relay 306 (3KA) or reduction, makes normally closed switch 334,336 become closure from off-state
State, electric capacity discharge loop is switched on, so that storage capacitor 222 discharges to breaker open operation coil 405.Energy storage electricity
The discharge current holding 222 makes to produce electromagnetic force in breaker open operation coil 405, drives the separating brake connecting rod in chopper to make above
Described breaker open operation, stops the first power supply 104.
Inventor of the present utility model observes, the second equipment being driven by second source influence on system operation to by
During the operation of the first equipment that one power supply is driven, existing o-volt protection circuit and system can produce the running protection of the first equipment
Less reliable technical problem.This utility model by the improvement of o-volt protection circuit and system and optimization design, in decompression
Innovatively increase energy storage device and charge-discharge control circuit in protection circuit, efficiently utilize the switching winding of chopper, make
Obtain after second source breaks down, the meeting action of one side chopper no-voltage trip coil, another aspect energy storage device also can be right
The switching winding of chopper is discharged, and makes breaker open operation, cuts off the first power supply, thus to first being powered by the first power supply
Equipment plays the effect of duplicate protection, that is,：When no-voltage trip coil is out of order, energy storage device discharges to switching winding,
Make breaker open operation, cut off the first power supply, protection is to the first equipment powered by the first power supply.One of the present utility model concrete
Application is：First power supply is powered for compressor, and second source is powered for oil pump；It is in operation, oil pump constantly carries for compressor
For lubricating oil.
Because this utility model efficiently utilizes the switching winding of chopper, in additional energy storage device, to mistake
Energy storage device, without changing or making very little change, is mainly connected or in parallel by voltage protection circuit and system existing structure with controlling
The switching winding being connected to chopper on.
Although being only shown and described to some features of the present utility model, to people in the art herein
Multiple improvement and change can be carried out for member.It is therefore to be understood that appended claim is intended to cover is fallen with this reality
With the above-mentioned improvement in new spirit and change.
Claims (10)
1. o-volt protection circuit (108), for the first power supply (104) is controlled according to the running status of second source (106), its
Be characterised by including：
Coil without tension protection circuit (204)；With
Energy storage protection circuit (202)；
Described o-volt protection circuit (108) is coupled between described first power supply (104) and second source (106)；
When decompression in described second source (106), described coil without tension protection circuit (204) or energy storage protection circuit
(202) stop described first power supply (104) independently of each other.
2. o-volt protection circuit (108) as claimed in claim 1 is it is characterised in that described o-volt protection circuit (108) also includes：
Control device (224,306), for controlling energy storage protection circuit (202)；
Described energy storage protection circuit (202) includes discharge loop (225), and described control device (224,306) is discharged back with described
Road (225) connects；
When described second source (106) is in normal condition, described control device (224,306) is by described discharge loop
(225) disconnect；
When described second source (106) is in malfunction, described control device (224,306) is by described discharge loop
(225) connect.
3. o-volt protection circuit (108) as claimed in claim 2 it is characterised in that：
Described energy storage protection circuit (202) is discharged to breaker open operation coil (405) by discharge loop (225), described
Energy storage protection circuit (202) is used for stopping described first power supply to the discharge current of described breaker open operation coil (405)
(104).
4. o-volt protection circuit (108) as claimed in claim 3, is provided with open circuit in the electric power loop of described first power supply (104)
Device (252) it is characterised in that：
When described second source (106) breaks down, described coil without tension protection circuit (204) and energy storage protection circuit
(202) make described chopper (252) separating brake；
Described switching winding (405) is arranged in described chopper (252).
5. o-volt protection circuit (108) as claimed in claim 4 it is characterised in that：
Described energy storage protection circuit (202) is connected in parallel to the two ends of described switching winding (405).
6. as described in any claim in claim 1-5 o-volt protection circuit (108) it is characterised in that：
Described first power supply (104) being controlled by described o-volt protection circuit (108) is powered to compressor (112)；
The described second source (106) being coupled with described o-volt protection circuit (108) is powered to oil pump (114)；
When second source (106) is in malfunction, described o-volt protection circuit (108) disconnects compressor (112) and first
Electric power loop between power supply (104).
7. start cabinet (102), including：
First power supply (104), described first power supply (104) is powered to compressor (112)；
Second source (106), described second source (106) is powered to oil pump (114)；
O-volt protection circuit (108), is coupled between described first power supply (104) and second source (106), in the second electricity
When breaking down in source (106), stop the first power supply (104)；
It is characterized in that described o-volt protection circuit (108) includes：
Coil without tension protection circuit (204)；With
Energy storage protection circuit (202)；
When described second source (106) breaks down, described coil without tension protection circuit (204) or energy storage protection circuit
(202) stop the first power supply (104) independently of each other.
8. startup cabinet (102) as claimed in claim 7 is it is characterised in that described o-volt protection circuit (108) also includes：
Control device (224,306), for controlling energy storage protection circuit (202)；
Described energy storage protection circuit (202) includes charge circuit (223) and discharge loop (225), described control device (224,
306) it is connected with described discharge loop (225)；
When described second source (106) is in normal condition, described control device (224,306) is by described discharge loop
(225) disconnect；
When described second source (106) is in malfunction, described control device (224,306) is by described discharge loop
(225) connect.
9. as claimed in claim 8 startup cabinet (102) it is characterised in that：
Described energy storage protection circuit (202) is discharged to breaker open operation coil (405), described energy storage protection circuit (202)
The discharge current of described breaker open operation coil (405) is used for stopping the first power supply (104).
10. as claimed in claim 9 startup cabinet (102) it is characterised in that：
It is provided with chopper (252) in the electric power loop of described first power supply (104)；
When second source (106) breaks down, described coil without tension protection circuit (204) and energy storage protection circuit (202) make
Obtain described chopper (252) separating brake；
Described switching winding (405) is arranged in described chopper (252), and described energy storage protection circuit (202) is connected in parallel
Two ends to described switching winding (405).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620795137.5U CN205945017U (en) | 2016-07-26 | 2016-07-26 | Under -voltage protection circuit and start -up cabinet |
| TW106124341A TW201817109A (en) | 2016-07-26 | 2017-07-20 | Voltage loss protection circuit and starting cabinet |
| PCT/IB2017/054385 WO2018020364A1 (en) | 2016-07-26 | 2017-07-20 | Voltage loss protection circuit and starting cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620795137.5U CN205945017U (en) | 2016-07-26 | 2016-07-26 | Under -voltage protection circuit and start -up cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945017U true CN205945017U (en) | 2017-02-08 |
Family
ID=57926234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620795137.5U Active CN205945017U (en) | 2016-07-26 | 2016-07-26 | Under -voltage protection circuit and start -up cabinet |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN205945017U (en) |
| TW (1) | TW201817109A (en) |
| WO (1) | WO2018020364A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994566A (en) * | 2019-12-04 | 2020-04-10 | 南京南瑞继保工程技术有限公司 | Mechanical switch trigger circuit and control method |
| CN111536727A (en) * | 2020-06-11 | 2020-08-14 | 淮南矿业(集团)有限责任公司 | Safety protection circuit of mine cooling system and control method |
| CN116110753A (en) * | 2023-04-11 | 2023-05-12 | 宁波天安智能电网科技股份有限公司 | Adjustable breaker safety loop system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2496342T3 (en) * | 2011-10-06 | 2014-09-18 | Abb Technology Ag | Coil actuator for a corresponding switch and switch |
| WO2014035745A1 (en) * | 2012-08-30 | 2014-03-06 | Johnson Controls Technology Company | Variable speed drive control for chiller coast-through |
| US9722408B2 (en) * | 2014-05-09 | 2017-08-01 | Intermountain Electronics, Inc. | ARC-free capacitor trip device |
-
2016
- 2016-07-26 CN CN201620795137.5U patent/CN205945017U/en active Active
-
2017
- 2017-07-20 TW TW106124341A patent/TW201817109A/en unknown
- 2017-07-20 WO PCT/IB2017/054385 patent/WO2018020364A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994566A (en) * | 2019-12-04 | 2020-04-10 | 南京南瑞继保工程技术有限公司 | Mechanical switch trigger circuit and control method |
| CN110994566B (en) * | 2019-12-04 | 2022-03-29 | 南京南瑞继保工程技术有限公司 | Mechanical switch trigger circuit and control method |
| CN111536727A (en) * | 2020-06-11 | 2020-08-14 | 淮南矿业(集团)有限责任公司 | Safety protection circuit of mine cooling system and control method |
| CN111536727B (en) * | 2020-06-11 | 2023-12-26 | 淮南矿业(集团)有限责任公司 | Safety protection circuit of mine cooling system and control method |
| CN116110753A (en) * | 2023-04-11 | 2023-05-12 | 宁波天安智能电网科技股份有限公司 | Adjustable breaker safety loop system |
| CN116110753B (en) * | 2023-04-11 | 2023-07-04 | 宁波天安智能电网科技股份有限公司 | Adjustable breaker safety loop system |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201817109A (en) | 2018-05-01 |
| WO2018020364A1 (en) | 2018-02-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |