AU2021102764A4 - Single phase preventer relay - Google Patents
Single phase preventer relay Download PDFInfo
- Publication number
- AU2021102764A4 AU2021102764A4 AU2021102764A AU2021102764A AU2021102764A4 AU 2021102764 A4 AU2021102764 A4 AU 2021102764A4 AU 2021102764 A AU2021102764 A AU 2021102764A AU 2021102764 A AU2021102764 A AU 2021102764A AU 2021102764 A4 AU2021102764 A4 AU 2021102764A4
- Authority
- AU
- Australia
- Prior art keywords
- phase
- circuit
- relay
- supply
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 230000006698 induction Effects 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000007858 starting material Substances 0.000 claims description 4
- NFBAXHOPROOJAW-UHFFFAOYSA-N phenindione Chemical compound O=C1C2=CC=CC=C2C(=O)C1C1=CC=CC=C1 NFBAXHOPROOJAW-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 5
- 230000001012 protector Effects 0.000 description 4
- 238000004353 relayed correlation spectroscopy Methods 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
-
- 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
- H02H7/0805—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 for synchronous motors
-
- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
-
- 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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
Abstract
The invention is related to the protection of three phase induction motor, more specifically in
a situation when one phase of the supply goes out of the operation due to a blown fuse, the
three phase motor continues to operate. The heat produced by the motor is maintained in a
sufficient time under single phase conditions.
3
1/1
ThreePhase Transfimer Reguted T PhaSt
Supply 440IV - Power Supply + Tne Cica -+ Rely Circui - State Indon
Fi eMotor
Figure 1
Description
1/1
ThreePhase Transfimer Reguted T PhaSt 440IV - Power Supply + Tne Cica -+ Rely Circui - State Indon Supply Fi eMotor
Figure 1
Title: SINGLE PHASE PREVENTER RELAY
Field of the invention:
The proposed invention is related to three phase induction motor and more specifically related to the continuous working of the three phase induction motor in a situation when one phase of the motor is blown out.
Background of the invention.
In a three-phase motor, single phase current of three-phase alternating currents loaded on a three phase motor may be lacked. Usually, the detection of open phase of the three-phase motor is generally realized by detecting a phase difference between the three-phase voltages using a detection circuit. However the detection circuit may comprise many components and have a complex structure.
One of the patent CN1085356A provides a protector for three-phase asynchronous motor composed of current detection circuit and control circuit. Said current detection circuit uses three phase current/voltage mutual inductor and said control circuit consists of rectifier-filter, phase loss protector, overload/overcurrent protector, block protector, master control gate, driver, phase loss remember and display circuits, overcurrent/overload remember and display circuits, and state display.
Summary:
A low-cost and effective protection scheme against unbalanced voltage has been developed for a three-phase induction motor. Taking the cost factor into the consideration the design has been proposed using the timer circuit, relay circuit, and the regulated power circuit. The circuit proposed here is to prevent the three phase induction motor for the phase failure fault. In this circuit if the three phase is proper than the motor will works or operate, if any of the phase or voltage is improper than the motor doesn't operate.
Description:
The circuit proposed here is to prevent the three phase induction motor for the phase failure fault. In this circuit if the three phase is proper than the motor will works or operate, if any of the phase or voltage is improper than the motor doesn't operate. The main working of this circuit is as following:
Three phase supply is directly connected to the circuit after that any two phase of the supply is given to the transformer and with the help of the transformer the voltage is step down to 440 V (Voltage) to 18 V. After step down the voltage the 18V AC (Alternating Current) supply is given to the regulated power circuit and with the help of regulated power circuit the 18V AC is converted to 12V DC (Direct Current). Now, the 12V DC is given to the Timer circuit, the function of the timer circuit is to provide the delay to run the induction motor. The output of the timer circuit is given to the relay circuit; the function of the relay circuit is switching of the three phase starter. In the relay circuit one phase is directly coming to the NO (Normally Open) point of the relay which will only operate when the phase voltage is 200V -240V. When the relay is operated the NO point convert to NC (Normally Close) point then the starter will operate.
Problems:
1) The cost is more due to the use of microcontrollers.
Solution:
1) System is reliable. 2) Cost is less as compared to other circuit in the market.
Advantages:
1) Size is compact. 2) Interface of the proposed model is easy then the other models
Claims (1)
- We claim:Three phase supply is directly connected to the circuit after that any two phase of the supply is given to the transformer and with the help of the transformer the voltage is step down to 440 V (Voltage) to 18 V. After step down the voltage the 18V AC (Alternating Current) supply is given to the regulated power circuit and with the help of regulated power circuit the 18V AC is converted to 12V DC (Direct Current). Now, the 12V DC is given to the Timer circuit, the function of the timer circuit is to provide the delay to run the induction motor. The output of the timer circuit is given to the relay circuit; the function of the relay circuit is switching of the three phase starter. In the relay circuit one phase is directly coming to the NO (Normally Open) point of the relay which will only operate when the phase voltage is 200V -240V. When the relay is operated the NO point convert to NC (Normally Close) point then the starter will operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021102764A AU2021102764A4 (en) | 2021-05-22 | 2021-05-22 | Single phase preventer relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021102764A AU2021102764A4 (en) | 2021-05-22 | 2021-05-22 | Single phase preventer relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021102764A4 true AU2021102764A4 (en) | 2021-07-08 |
Family
ID=76662674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021102764A Ceased AU2021102764A4 (en) | 2021-05-22 | 2021-05-22 | Single phase preventer relay |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021102764A4 (en) |
-
2021
- 2021-05-22 AU AU2021102764A patent/AU2021102764A4/en not_active Ceased
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |