CN112421991A - Self-coupling decompression starting device - Google Patents
Self-coupling decompression starting device Download PDFInfo
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- CN112421991A CN112421991A CN202011203830.6A CN202011203830A CN112421991A CN 112421991 A CN112421991 A CN 112421991A CN 202011203830 A CN202011203830 A CN 202011203830A CN 112421991 A CN112421991 A CN 112421991A
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- 238000010168 coupling process Methods 0.000 title claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 11
- 230000006837 decompression Effects 0.000 title claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 30
- 239000007858 starting material Substances 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003063 flame retardant Substances 0.000 abstract description 3
- 239000003292 glue Substances 0.000 abstract description 2
- 210000001503 joint Anatomy 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
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Classifications
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- 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
-
- 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
- H02H7/085—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 excessive load
-
- 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
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- 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
- H02P1/02—Details of starting control
-
- 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
- H02P1/02—Details of starting control
- H02P1/022—Security devices, e.g. correct phase sequencing
-
- 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
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/28—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive increase of voltage applied to primary circuit of motor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Motor And Converter Starters (AREA)
- Relay Circuits (AREA)
Abstract
The invention relates to an auto-coupling decompression starting device. The invention relates to the technical field of decompression starting control of a secondary control loop, and discloses a device for completing decompression starting by reasonably designing and combining components such as a three-phase protective relay, a time relay small-sized intermediate relay, a double-sided printed circuit board, an ABS flame-retardant shell and the like. The invention adopts a totally-enclosed electronic glue encapsulating structure and a double-sided printed circuit board, thereby avoiding the links of loosening each node, not preventing dust and water and ensuring the reliable operation of electrical equipment. If the service life is long, the module is aged and breaks down, and the butt joint terminal is pulled out to replace the module of the same type, so that the module has the advantages of super-strong time and labor saving. The invention is suitable for the secondary loop control of the voltage-reducing starting cabinet of the high-power electric equipment with the three-phase alternating-current 380V power supply. And a double-sided printed circuit board is adopted, so that a secondary circuit is optimized and integrated, and complicated manual wiring is avoided.
Description
Technical Field
The invention relates to the technical field of decompression starting control of a secondary control loop, in particular to an auto decompression starting device.
Background
The secondary control circuit of the self-coupling voltage-reducing starting cabinet in the market at present mostly adopts a manual wiring mode, and corresponding control lines are respectively connected to all elements of the starting cabinet, so that the manual wiring consumes a large amount of labor and wires. And the contact is arranged on the starting cabinet contactor, so that the starting cabinet contactor is not dustproof and waterproof, and the fault is difficult to check when the fault occurs. Each node is loose, and the electrical equipment is unreliable in operation due to the links of dust prevention and water prevention.
Disclosure of Invention
The invention provides a self-coupling decompression starting device for avoiding the links of loosening each node, not preventing dust and water and ensuring reliable operation of electrical equipment, and the invention provides the following technical scheme:
a self-coupled pressure relief starter device, the device comprising: three protective tubes, a capacitor C1, a capacitor C2, a capacitor C3, a buzzer, a three-phase protective relay J0, a normally open contact KO of the three-phase protective relay J0, a relay J1, a normally open contact K1 of the relay J1, a starting cabinet panel, an actuator J2, a green lamp D1, an operating contactor KM1, a relay J3, a normally open contact K3 of the relay J3, a first normally closed contact K3 of the relay J3, a second normally closed contact K3 of the relay J3, a time relay KT, a normally open contact KT 'of the time relay KT, a red lamp D2, a relay J4, a normally open contact K4 of the relay J4, a normally closed contact K4' of the relay J4, a starting contactor KM2 and a yellow lamp D3; the starting cabinet panel comprises a stop switch SB1 and a starting switch SB 2;
the ABC three phases of a 380 voltage source are respectively connected with one ends of three protective tubes, one ends of a capacitor C1, a capacitor C2 and a capacitor C3 are respectively connected with the other ends of the protective tubes connected with the phases A, C and B, the other ends of the capacitor C1, the capacitor C2 and the capacitor C3 are respectively connected with a buzzer, the other ends of the protective tubes connected with the phases A, C and B are connected with one end of a three-phase protection relay J0, the other end of the three-phase protection relay J0 is connected with one end of a normally open contact KO of the three-phase protection relay J0, one end of the normally open contact KO is connected with one end of a normally open contact K1 of a relay J1, and one end of the normally open contact K1 of the relay J1 is connected with the other end of the protective; the other end of the normally open contact KO is connected with one end of a relay J1, the other end of the relay J1 and the other end of the protective tube connected with the phase B are both connected with one end of a stop switch SB1, and one end of the stop switch SB1 is connected with one end of a start switch SB 2;
the other end of a normally open contact K1 of the relay J1 is connected with one end of an operation contactor KM1, a green lamp D1, an actuator J2, a relay J3 and a red lamp D2 respectively, the other ends of a green lamp D1, an actuator J2 and a relay J3 are connected with one end of a normally open contact K3 of a relay J3 respectively, the other end of the actuator J2 is connected with the other end of an operation contactor KM1, the other end of the relay J3 is connected with one end of a normally open contact KT ' of a time relay KT, the other end of a normally open contact K3 is connected with the other ends of a first normally closed contact K3 ' and a normally open contact KT ' of a relay 3 respectively, one end of a first normally closed contact K3 ' of a relay 82J 56 is connected with the other end of a normally closed contact K4 ' of a relay J4, and one end of a normally;
the one end of red lamp D2 is connected the one end of second normally closed contact K3 ", yellow lamp D3 and time relay KT of relay J3 respectively, the one end of relay J4 and starting contactor KM2 is connected respectively to the other end of second normally closed contact K3", and the one end of normally open contact K4 of relay J4 is connected to the other end of starting contactor KM2, the one end of starting switch SB2 is connected to the other end of normally open contact K4, the other end of yellow lamp D3, the other end of time relay KT and relay J4 are connected respectively to the other end of starting switch SB 2.
Preferably, when one or two of ABC three phases of the 380 voltage source are lack, the parallel connection point of the three capacitors generates about 48V voltage, so that the buzzer buzzes to give out a phase lack alarm.
Preferably, the protective tube is a resin protective tube.
Preferably, when the three-phase protective relay J0 is in the absence of a one-phase voltage or a two-phase voltage, the normally open contact KO of the three-phase protective relay J0 is open, and the autotransformer starting device refuses to enter the operating mode.
Preferably, when the three-phase protection relay J0 is powered on to work, the normally open contact KO of the three-phase protection relay J0 is changed into a closed conducting state, the coil of the relay J1 is powered on to attract, and the normally open contact of the relay J1 is changed into a closed conducting state; the actuator J2, the relays J3, J4 and the time relay KT are all applied with A phase voltage;
when a starting button SB2 is pressed, a phase B voltage is applied to a relay J4 through switches SB1 and SB2, the J4 is electrified and attracted, a normally open contact K4 of the relay J4 is closed, and the phase B voltage is applied to one end of a coil of the relay J4 through the normally open contact K4 to form a self-locking loop; a, B two-phase 380V voltage is added to the two ends of the yellow light D3 to light the yellow light, and the relay J4 enters a working state; the red light D2 is added with A phase voltage and passes through a normally closed contact K4' of the relay J4 and a normally open contact K3 of the relay J3;
when the voltage is applied to the phase B voltage, the relay J4 is electrified and pulled in, the normally closed contact K4' is changed into a disconnected state, the red light D2 is changed from being lightened to being extinguished, the relay J4 starts to work, and two leads are led out from two ends of a coil of the starting relay to the outside and are used as a magnetic coil power supply input line of a starting contactor KM2 of a starting cabinet.
Preferably, after the relay J4 is electrified and attracted to enter a working state, the voltage of a phase B is transmitted from a lead to the relay J4 through a stop button SB 1-K4, the voltage of the phase A is simultaneously added to the relay J4, the time relay is electrified and attracted, after several seconds, a normally open contact KT of the time relay is closed, the voltage of the phase B is applied to one end of a coil of the relay J3 through a KT point, and the relay J3 is electrified and attracted;
the normally open contact K3 of the relay J3 is changed from a normally open state to a closed state, the relay J3 forms a self-locking loop, the phase voltage B is applied to the actuator J2, meanwhile, the phase voltage A is applied to the relay J2, the relay J2 is electrified to work, the green lamp D1 is electrified to light, outgoing lines at two ends of the relay J2 are used as power input lines of the operation contactor KM1, and the operation contactor of the starting cabinet is electrified to pull in work;
after the relay J3 is electrified and closed, the second normally closed contact K3' of the relay J3 of the relay J3 is changed from a closed state to an open state, the relay J4 is released in a voltage loss mode, the starting contactor of the starting cabinet is also released in a voltage loss mode, and the yellow lamp D3 is extinguished in a voltage loss mode.
The invention has the following beneficial effects:
the invention adopts a totally-enclosed electronic glue encapsulating structure and a double-sided printed circuit board, thereby avoiding the links of loosening each node, not preventing dust and water and ensuring the reliable operation of electrical equipment. If the service life is long, the module is aged and breaks down, and the butt joint terminal is pulled out to replace the module of the same type, so that the module has the advantages of super-strong time and labor saving.
The invention is suitable for the secondary loop control of the voltage-reducing starting cabinet of the high-power electric equipment with the three-phase alternating-current 380V power supply. And a double-sided printed circuit board is adopted, so that a secondary circuit is optimized and integrated, and complicated manual wiring is avoided. The three-phase power supply can stop the starting cabinet to supply power to the equipment rapidly when any phase is lacked, thereby effectively protecting the electric equipment such as the motor, the submersible pump and the like. The phase-failure automatic alarm device has the function of automatic phase-failure alarm, prompts work, and timely detects and maintains the power supply circuit by maintenance personnel so as to return to normal production. The starting cabinet has the advantages of being fast assembled and maintained. The installation only needs to press the description to connect corresponding pilot lamp, control button, power triplex, and two multiposition terminals to inserting after finishing can. The wiring in the secondary circuit which consumes too long time and is complicated is avoided, the assembly and maintenance time is greatly saved, and the production working efficiency is effectively improved. The module is packaged by adopting a flame-retardant shell, and black electronic pouring sealant is filled and encapsulated in the module.
Drawings
FIG. 1 is an electrical schematic diagram of the self-coupling voltage-reducing starter;
fig. 2 is a module printed wiring board.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The first embodiment is as follows:
as shown in fig. 1 to 2, the present invention provides an auto voltage reduction starter, which specifically comprises:
a self-coupled pressure relief starter device, the device comprising: three protective tubes, a capacitor C1, a capacitor C2, a capacitor C3, a buzzer, a three-phase protective relay J0, a normally open contact KO of the three-phase protective relay J0, a relay J1, a normally open contact K1 of the relay J1, a starting cabinet panel, an actuator J2, a green lamp D1, an operating contactor KM1, a relay J3, a normally open contact K3 of the relay J3, a first normally closed contact K3 of the relay J3, a second normally closed contact K3 of the relay J3, a time relay KT, a normally open contact KT 'of the time relay KT, a red lamp D2, a relay J4, a normally open contact K4 of the relay J4, a normally closed contact K4' of the relay J4, a starting contactor KM2 and a yellow lamp D3; the starting cabinet panel comprises a stop switch SB1 and a starting switch SB 2;
the ABC three phases of a 380 voltage source are respectively connected with one ends of three protective tubes, one ends of a capacitor C1, a capacitor C2 and a capacitor C3 are respectively connected with the other ends of the protective tubes connected with the phases A, C and B, the other ends of the capacitor C1, the capacitor C2 and the capacitor C3 are respectively connected with a buzzer, the other ends of the protective tubes connected with the phases A, C and B are connected with one end of a three-phase protection relay J0, the other end of the three-phase protection relay J0 is connected with one end of a normally open contact KO of the three-phase protection relay J0, one end of the normally open contact KO is connected with one end of a normally open contact K1 of a relay J1, and one end of the normally open contact K1 of the relay J1 is connected with the other end of the protective; the other end of the normally open contact KO is connected with one end of a relay J1, the other end of the relay J1 and the other end of the protective tube connected with the phase B are both connected with one end of a stop switch SB1, and one end of the stop switch SB1 is connected with one end of a start switch SB 2;
the other end of a normally open contact K1 of the relay J1 is connected with one end of an operation contactor KM1, a green lamp D1, an actuator J2, a relay J3 and a red lamp D2 respectively, the other ends of a green lamp D1, an actuator J2 and a relay J3 are connected with one end of a normally open contact K3 of a relay J3 respectively, the other end of the actuator J2 is connected with the other end of an operation contactor KM1, the other end of the relay J3 is connected with one end of a normally open contact KT ' of a time relay KT, the other end of a normally open contact K3 is connected with the other ends of a first normally closed contact K3 ' and a normally open contact KT ' of a relay 3 respectively, one end of a first normally closed contact K3 ' of a relay 82J 56 is connected with the other end of a normally closed contact K4 ' of a relay J4, and one end of a normally;
the one end of red lamp D2 is connected the one end of second normally closed contact K3 ", yellow lamp D3 and time relay KT of relay J3 respectively, the one end of relay J4 and starting contactor KM2 is connected respectively to the other end of second normally closed contact K3", and the one end of normally open contact K4 of relay J4 is connected to the other end of starting contactor KM2, the one end of starting switch SB2 is connected to the other end of normally open contact K4, the other end of yellow lamp D3, the other end of time relay KT and relay J4 are connected respectively to the other end of starting switch SB 2.
When one or two of ABC three phases of the 380 voltage source are lack, the parallel connection point of the three capacitors generates about 48V voltage, so that the buzzer buzzes, and a phase-lack alarm is given.
When the three-phase protective relay J0 lacks a voltage of one phase or two phases, the normally open contact KO of the three-phase protective relay J0 is in an open state, and the self-coupling voltage reduction starting device refuses to enter a working mode.
When the three-phase protection relay J0 works by being electrified, the normally open contact KO of the three-phase protection relay J0 is changed into a closed conducting state, the coil of the relay J1 is electrified and sucked, and the normally open contact of the relay J1 is changed into a closed conducting state; the actuator J2, the relays J3, J4 and the time relay KT are all applied with A phase voltage;
when a starting button SB2 is pressed, a phase B voltage is applied to a relay J4 through switches SB1 and SB2, the J4 is electrified and attracted, a normally open contact K4 of the relay J4 is closed, and the phase B voltage is applied to one end of a coil of the relay J4 through the normally open contact K4 to form a self-locking loop; a, B two-phase 380V voltage is added to the two ends of the yellow light D3 to light the yellow light, and the relay J4 enters a working state; the red light D2 is added with A phase voltage and passes through a normally closed contact K4' of the relay J4 and a normally open contact K3 of the relay J3;
when the voltage is applied to the phase B voltage, the relay J4 is electrified and pulled in, the normally closed contact K4' is changed into a disconnected state, the red light D2 is changed from being lightened to being extinguished, the relay J4 starts to work, and two leads are led out from two ends of a coil of the starting relay to the outside and are used as a magnetic coil power supply input line of a starting contactor KM2 of a starting cabinet.
After the relay J4 is electrified and attracted to enter a working state, a B phase voltage is transmitted to the relay J4 from a lead through a stop button SB 1-K4, an A phase voltage is simultaneously added to the relay J4, the time relay is electrified and attracted, after several seconds, a normally open contact KT of the time relay is closed, the B phase voltage is applied to one end of a coil of the relay J3 through a KT point, and the J3 relay is electrified and attracted;
the normally open contact K3 of the relay J3 is changed from a normally open state to a closed state, the relay J3 forms a self-locking loop, the phase voltage B is applied to the actuator J2, meanwhile, the phase voltage A is applied to the relay J2, the relay J2 is electrified to work, the green lamp D1 is electrified to light, outgoing lines at two ends of the relay J2 are used as power input lines of the operation contactor KM1, and the operation contactor of the starting cabinet is electrified to pull in work;
after the relay J3 is electrified and closed, the second normally closed contact K3' of the relay J3 of the relay J3 is changed from a closed state to an open state, the relay J4 is released in a voltage loss mode, the starting contactor of the starting cabinet is also released in a voltage loss mode, and the yellow lamp D3 is extinguished in a voltage loss mode.
The protective tube is made of resin. The device of the invention is a device which completes decompression starting by the reasonable circuit design combination of components such as a three-phase protective relay, a time relay small-sized intermediate relay, a double-sided printed circuit board, an ABS flame-retardant shell and the like.
The above description is only a preferred embodiment of the self-coupling voltage reduction starting device, and the protection scope of the self-coupling voltage reduction starting device is not limited to the above embodiments, and all technical solutions belonging to the idea belong to the protection scope of the present invention. It should be noted that modifications and variations which do not depart from the gist of the invention will be those skilled in the art to which the invention pertains and which are intended to be within the scope of the invention.
Claims (6)
1. A self-coupling decompression starting device is characterized in that: the device comprises: three protective tubes, a capacitor C1, a capacitor C2, a capacitor C3, a buzzer, a three-phase protective relay J0, a normally open contact KO of the three-phase protective relay J0, a relay J1, a normally open contact K1 of the relay J1, a starting cabinet panel, an actuator J2, a green lamp D1, an operating contactor KM1, a relay J3, a normally open contact K3 of the relay J3, a first normally closed contact K3 of the relay J3, a second normally closed contact K3 of the relay J3, a time relay KT, a normally open contact KT 'of the time relay KT, a red lamp D2, a relay J4, a normally open contact K4 of the relay J4, a normally closed contact K4' of the relay J4, a starting contactor KM2 and a yellow lamp D3; the starting cabinet panel comprises a stop switch SB1 and a starting switch SB 2;
the ABC three phases of a 380 voltage source are respectively connected with one ends of three protective tubes, one ends of a capacitor C1, a capacitor C2 and a capacitor C3 are respectively connected with the other ends of the protective tubes connected with the phases A, C and B, the other ends of the capacitor C1, the capacitor C2 and the capacitor C3 are respectively connected with a buzzer, the other ends of the protective tubes connected with the phases A, C and B are connected with one end of a three-phase protection relay J0, the other end of the three-phase protection relay J0 is connected with one end of a normally open contact KO of the three-phase protection relay J0, one end of the normally open contact KO is connected with one end of a normally open contact K1 of a relay J1, and one end of the normally open contact K1 of the relay J1 is connected with the other end of the protective; the other end of the normally open contact KO is connected with one end of a relay J1, the other end of the relay J1 and the other end of the protective tube connected with the phase B are both connected with one end of a stop switch SB1, and one end of the stop switch SB1 is connected with one end of a start switch SB 2;
the other end of a normally open contact K1 of the relay J1 is connected with one end of an operation contactor KM1, a green lamp D1, an actuator J2, a relay J3 and a red lamp D2 respectively, the other ends of a green lamp D1, an actuator J2 and a relay J3 are connected with one end of a normally open contact K3 of a relay J3 respectively, the other end of the actuator J2 is connected with the other end of an operation contactor KM1, the other end of the relay J3 is connected with one end of a normally open contact KT ' of a time relay KT, the other end of a normally open contact K3 is connected with the other ends of a first normally closed contact K3 ' and a normally open contact KT ' of a relay 3 respectively, one end of a first normally closed contact K3 ' of a relay 82J 56 is connected with the other end of a normally closed contact K4 ' of a relay J4, and one end of a normally;
the one end of red lamp D2 is connected the one end of second normally closed contact K3 ", yellow lamp D3 and time relay KT of relay J3 respectively, the one end of relay J4 and starting contactor KM2 is connected respectively to the other end of second normally closed contact K3", and the one end of normally open contact K4 of relay J4 is connected to the other end of starting contactor KM2, the one end of starting switch SB2 is connected to the other end of normally open contact K4, the other end of yellow lamp D3, the other end of time relay KT and relay J4 are connected respectively to the other end of starting switch SB 2.
2. The self-coupled pressure relief starter device of claim 1 further comprising: when one or two of ABC three phases of the 380 voltage source are lack, the parallel connection point of the three capacitors generates about 48V voltage, so that the buzzer buzzes, and a phase-lack alarm is given.
3. The self-coupled pressure relief starter device of claim 1 further comprising: the protective tube is made of resin.
4. The self-coupled pressure relief starter device of claim 1 further comprising: when the three-phase protective relay J0 lacks a voltage of one phase or two phases, the normally open contact KO of the three-phase protective relay J0 is in an open state, and the self-coupling voltage reduction starting device refuses to enter a working mode.
5. The self-coupled pressure relief starter device of claim 1 further comprising: when the three-phase protection relay J0 works by being electrified, the normally open contact KO of the three-phase protection relay J0 is changed into a closed conducting state, the coil of the relay J1 is electrified and sucked, and the normally open contact of the relay J1 is changed into a closed conducting state; the actuator J2, the relays J3, J4 and the time relay KT are all applied with A phase voltage;
when a starting button SB2 is pressed, a phase B voltage is applied to a relay J4 through switches SB1 and SB2, the J4 is electrified and attracted, a normally open contact K4 of the relay J4 is closed, and the phase B voltage is applied to one end of a coil of the relay J4 through the normally open contact K4 to form a self-locking loop; a, B two-phase 380V voltage is added to the two ends of the yellow light D3 to light the yellow light, and the relay J4 enters a working state; the red light D2 is added with A phase voltage and passes through a normally closed contact K4' of the relay J4 and a normally open contact K3 of the relay J3;
when the voltage is applied to the phase B voltage, the relay J4 is electrified and pulled in, the normally closed contact K4' is changed into a disconnected state, the red light D2 is changed from being lightened to being extinguished, the relay J4 starts to work, and two leads are led out from two ends of a coil of the starting relay to the outside and are used as a magnetic coil power supply input line of a starting contactor KM2 of a starting cabinet.
6. The self-coupled pressure relief starter device of claim 1 further comprising: after the relay J4 is electrified and attracted to enter a working state, a B phase voltage is transmitted to the relay J4 from a lead through a stop button SB 1-K4, an A phase voltage is simultaneously added to the relay J4, the time relay is electrified and attracted, after several seconds, a normally open contact KT of the time relay is closed, the B phase voltage is applied to one end of a coil of the relay J3 through a KT point, and the J3 relay is electrified and attracted;
the normally open contact K3 of the relay J3 is changed from a normally open state to a closed state, the relay J3 forms a self-locking loop, the phase voltage B is applied to the actuator J2, meanwhile, the phase voltage A is applied to the relay J2, the relay J2 is electrified to work, the green lamp D1 is electrified to light, outgoing lines at two ends of the relay J2 are used as power input lines of the operation contactor KM1, and the operation contactor of the starting cabinet is electrified to pull in work;
after the relay J3 is electrified and closed, the second normally closed contact K3' of the relay J3 of the relay J3 is changed from a closed state to an open state, the relay J4 is released in a voltage loss mode, the starting contactor of the starting cabinet is also released in a voltage loss mode, and the yellow lamp D3 is extinguished in a voltage loss mode.
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