CN201616661U - Three-phase alternating current motor automatic phase-conversion default-phase protecting instrument - Google Patents
Three-phase alternating current motor automatic phase-conversion default-phase protecting instrument Download PDFInfo
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- CN201616661U CN201616661U CN201020121698XU CN201020121698U CN201616661U CN 201616661 U CN201616661 U CN 201616661U CN 201020121698X U CN201020121698X U CN 201020121698XU CN 201020121698 U CN201020121698 U CN 201020121698U CN 201616661 U CN201616661 U CN 201616661U
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Abstract
The utility model relates to a three-phase alternating current motor automatic phase-conversion default-phase protecting instrument, comprising a switch, a fuse protector, a three-phase alternating current phase sequence and default-phase detection relay, an intermediate relay, a forward direction alternating current contactor, a reverse alternating current contactor, a three-phase alternating current phase sequence and default-phase detection relay for protection and an alternating current contactor for protection, no matter whether the phase sequence of a power system is normal, the three-phase alternating current motor can obtain three-phase alternating current power supply with normal phase sequence to operate normally. When relative devices work abnormally or lack phases, the protecting instrument can control to power off the power supply of the three-phase alternating current motor, so as to protect the motor and equipment; and an phase sequence and default-phase display device and an alarming device are arranged; in the three-phase alternating current motor automatic phase-conversion default-phase protecting instrument, the structure of the three-phase alternating current motor phase sequence and default-phase detection protective device can be simplified, the cost is reduced, the detecting and protecting reliability is improved, and the operating and managing level of the three-phase alternating current motor is improved.
Description
Technical field
The utility model relates to a kind of three-phase alternating-current motor protection instrument, the automatic commutation open-phase protection of particularly a kind of three-phase alternating-current motor instrument.
Background technology
The direction of rotation of three-phase alternating-current motor is directly related with the phase sequence of three-phase alternating-current supply, the three-phase alternating-current motor that newly comes into operation, in the process of test running, because the phase sequence of three-phase alternating-current supply can't directly be predicted, there is the possibility of reverse rotation in three-phase alternating-current motor, in the process of power supply circuits maintenance, adjustment, because the phase sequence of three-phase alternating-current supply can't directly be predicted
Also there is the possibility of reverse rotation in three-phase alternating-current motor, and the accidental counter rotation of a lot of plant equipment can cause the fault or the damage of plant equipment.Three-phase alternating-current supply is owing to reasons such as contingency, natural calamities; open-phase fault can take place; open-phase fault not only can cause the motor stall even burn; also can cause the fault of corresponding plant equipment; even cause the generation of major accident; therefore the power supply of three-phase alternating-current motor being carried out the automatic detection of phase sequence and phase shortage, and the corresponding protection measure is provided, is an important process in electric drive technology field.The present three-phase alternating-current motor phase sequence of using and the automatic detection protective device ubiquity complex structure of phase shortage, the problem that cost is high, the actual needs of the automatic detection protection of incompatibility phase sequence and phase shortage.
The utility model content
In order to overcome the ubiquitous complex structure of automatic detection protective device of existing three-phase alternating-current motor phase sequence and phase shortage; the cost height; the problem of incompatibility actual needs; the utility model proposes the automatic commutation open-phase protection of a kind of three-phase alternating-current motor instrument; the technical scheme that is adopted is: the automatic commutation open-phase protection of three-phase alternating-current motor instrument; comprise switch; fuse; phase order of 3-phase AC and phase shortage detect relay and A.C. contactor; the three-phase detection end that phase order of 3-phase AC and phase shortage detect relay is electrically connected with the three-phase alternating current power supply circuits of three-phase alternating-current motor; phase order of 3-phase AC and phase shortage detect relay and are provided with the detection normally open contact; under the phase sequence of three-phase alternating current state normal and not phase shortage, detect the normally open contact closure; the power supply circuits that detect normally open contact and A.C. contactor solenoid are connected in series, and the normally open contact of A.C. contactor and the power supply circuits of three-phase alternating-current motor are connected in series.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with protection and detect relay and protection A.C. contactor with phase order of 3-phase AC and phase shortage; the three-phase detection end that protection detects relay with phase order of 3-phase AC and phase shortage is arranged on after the normally open contact of A.C. contactor; protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact; protection detects the normally open contact closure under the phase sequence of three-phase alternating current state normal and not phase shortage; protection detects normally open contact and is connected in series with the power supply circuits of protection with the A.C. contactor solenoid, and protection is connected in series with the normally open contact of A.C. contactor and the power supply circuits of three-phase alternating-current motor.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with auxiliary relay; the forward A.C. contactor; the Opposed crossing contactor; protection detects relay and protection A.C. contactor with phase order of 3-phase AC and phase shortage; normally open contact and middle normally closed interlock in the middle of auxiliary relay is provided with; the power supply circuits that detect normally open contact and auxiliary relay solenoid are connected in series; the power supply circuits of middle normally open contact and forward A.C. contactor solenoid are connected in series; the power supply circuits of middle normally closed interlock and Opposed crossing contactor solenoid are connected in series; the normally open contact of the normally open contact of forward A.C. contactor and Opposed crossing contactor is connected in parallel; and be connected in series with the power supply circuits of three-phase alternating-current motor respectively; wherein forward A.C. contactor and Opposed crossing contactor; respectively there be being connected in series of power supply circuits of 2 normally open contacts and three-phase alternating-current motor to be being connected in series of negative-phase sequence mutually; the three-phase detection end that protection detects relay with phase order of 3-phase AC and phase shortage is arranged on after the normally open contact of forward A.C. contactor and Opposed crossing contactor; and be electrically connected with the three phase supply circuit of three-phase alternating-current motor; protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact; protection detects the normally open contact closure under the phase sequence of three-phase alternating current state normal and not phase shortage; protection detects normally open contact and is connected in series with the power supply circuits of protection with the A.C. contactor solenoid, and protection is connected in series with the normally open contact of A.C. contactor and the power supply circuits of three-phase alternating-current motor.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with protection and detect relay with phase order of 3-phase AC and phase shortage; protection is used A.C. contactor with auxiliary relay with protecting; protection detects the three-phase detection end of relay with phase order of 3-phase AC and phase shortage; be arranged on after the normally open contact of the normally open contact of forward A.C. contactor and Opposed crossing contactor; and be electrically connected with the three phase supply circuit of three-phase alternating-current motor; protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact; protection detects the normally open contact closure under the phase sequence of three-phase alternating current state normal and not phase shortage; protection detects normally open contact and is connected in series with the power supply circuits of protection with the auxiliary relay solenoid; protection is provided with the middle normally open contact of protection with auxiliary relay; normally open contact is connected in series with the power supply circuits of protection with the A.C. contactor solenoid in the middle of the protection, and protection is connected in series with the normally open contact of A.C. contactor and the power supply circuits of three-phase alternating-current motor.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with phase sequence forward display unit and phase sequence and oppositely reach the phase shortage display unit; show normally open contact and the middle normally closed interlock that shows in the middle of auxiliary relay is provided with, middle normally open contact and the middle normally closed interlock that shows of showing is connected in series with the power supply circuits that phase sequence forward display unit and phase sequence oppositely reach the phase shortage display unit respectively.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with phase sequence forward display unit and phase sequence and oppositely reach the phase shortage display unit; forward A.C. contactor and Opposed crossing contactor are respectively equipped with forward and show normally open contact and oppositely show normally open contact, and forward shows normally open contact and shows that oppositely normally open contact is connected in series with the power supply circuits that phase sequence forward display unit and phase sequence oppositely reach the phase shortage display unit respectively.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with warning device; warning device is an acoustic warning device; or light alarming device; or the sound, light alarming device; protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally closed interlock, and the power supply circuits that protection detects normally closed interlock and described warning device are connected in series.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with warning device; warning device is an acoustic warning device; or light alarming device; or the sound, light alarming device; protection is provided with the warning normally closed interlock with auxiliary relay, and the power supply circuits of warning normally closed interlock and warning device are connected in series.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with the safe voltage feedway; the safe voltage feedway comprises battery, and the power supply circuits that phase sequence forward display unit, phase sequence oppositely reach phase shortage display unit and warning device are electrically connected with the safe voltage feedway.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with electric power conversion apparatus; electric power conversion apparatus be provided with input, output, transformer, rectifier or and pressurizer, input is electrically connected with AC power, output is electrically connected with the safe voltage feedway.
The automatic commutation open-phase protection of three-phase alternating-current motor of the present utility model instrument; the technique effect that adopts technique scheme to obtain is: phase order of 3-phase AC and phase shortage detect relay; can detect the phase sequence of three-phase alternating current and phase shortage whether; under the phase sequence of three-phase alternating current state normal and not phase shortage; phase order of 3-phase AC and phase shortage detect the detection normally open contact closure of relay; make the normally open contact adhesive of A.C. contactor; provide phase sequence normal to three-phase alternating-current motor; the three-phase alternating-current supply of phase shortage not; in case and phase sequence mistake or phase shortage; detecting normally open contact disconnects immediately; the normally open contact of A.C. contactor also disconnects immediately; stop to three-phase alternating-current motor power supply, thereby stopped the motor and the equipment fault that produce because of phase sequence mistake or phase shortage.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with protection and detect relay and protection A.C. contactor with phase order of 3-phase AC and phase shortage; detect relay and A.C. contactor work is undesired or during phase shortage in phase order of 3-phase AC and phase shortage; protection detects relay and protects the power supply that disconnects three-phase alternating-current motor with A.C. contactor with phase order of 3-phase AC and phase shortage, and motor and equipment are protected.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with auxiliary relay, forward A.C. contactor and Opposed crossing contactor; no matter make the phase sequence of three-phase alternating-current motor electrical network whether normal, can both obtain the normal three-phase alternating-current supply supply of phase sequence and run well.Undesired at phase order of 3-phase AC and phase shortage detection relay, auxiliary relay and each A.C. contactor work; or during phase shortage; protection detects relay and protects the power supply that disconnects three-phase alternating-current motor with A.C. contactor with phase order of 3-phase AC and phase shortage, and motor and equipment are protected.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with the protection auxiliary relay; can alleviate protection and detect the load that relay protection detects normally open contact with phase order of 3-phase AC and phase shortage; prolong the life-span of protection, improve the reliability of the automatic commutation open-phase protection of three-phase alternating-current motor instrument with phase order of 3-phase AC and phase shortage detection relay.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with phase sequence forward display unit and phase sequence and oppositely reach the phase shortage display unit; and by the demonstration of auxiliary relay control phase sequence state; the phase sequence state of three-phase alternating-current supply and phase shortage whether be can show in real time, the control and the management work of motor made things convenient for.
Phase sequence forward display unit and phase sequence oppositely reach the phase shortage display unit, by forward A.C. contactor and the directly control respectively of Opposed crossing contactor, make the control of phase sequential display device more direct, have further improved the reliability of phase sequential display device work.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with warning device; in the time of can the fault of phase sequence mistake or phase shortage occurring at the power supply that three-phase alternating-current motor finally obtains; detect relay by protection with phase order of 3-phase AC and phase shortage and in the power supply that cuts off motor, give the alarm, remind operating personnel to note.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; by the warning normally closed interlock control warning device of protection with auxiliary relay; can alleviate protection detects relay with phase order of 3-phase AC and phase shortage work load; prolong the life-span of protection, improve the reliability of the automatic commutation open-phase protection of three-phase alternating-current motor instrument with phase order of 3-phase AC and phase shortage detection relay.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with the safe voltage feedway; in the time of can occurring faults such as phase shortage at three-phase alternating-current supply; utilize the electric power of battery; make the device such as the demonstration of phase sequence state and phase shortage, warning still can operate as normal, be beneficial to normally carrying out of Motor Control, management work.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument is provided with electric power conversion apparatus, can utilize AC power that the electric power of safe voltage is provided, and can be battery charge, guarantees the long-term operate as normal of safe voltage feedway.
Use the automatic commutation open-phase protection of three-phase alternating-current motor of the present utility model instrument; can simplify the structure of three-phase alternating-current motor phase sequence, phase shortage detection protective device; reduce cost, improve the reliability that detects and protect, improve the level of three-phase alternating-current motor operation and management.
Description of drawings
Accompanying drawing 1 is the electric logical schematic of the automatic commutation open-phase protection of the utility model three-phase alternating-current motor instrument.
Accompanying drawing 2 is electric principle schematic of the automatic commutation open-phase protection of the utility model three-phase alternating-current motor instrument.
Sign implication in the accompanying drawing is as follows:
The 1-switch; the 2-three-phase fuse; the 3-electric power conversion apparatus; the 4-warning device; the single-phase fuse of 5-; 6-safe voltage feedway; the 61-battery; 7-phase sequence forward display unit; the 8-phase sequence oppositely reaches the phase shortage display unit; 9-phase order of 3-phase AC and phase shortage detect relay; 91-detects normally open contact; 10-protection auxiliary relay solenoid; normally open contact in the middle of the 101-protection, 102-warning normally closed interlock, 11-auxiliary relay solenoid; normally open contact in the middle of the 111-; show normally open contact in the middle of the normally closed interlock in the middle of the 112-, 113-, show normally closed interlock in the middle of the 114-; 12-forward A.C. contactor normally open contact; 13-Opposed crossing contactor normally open contact, 14-protection A.C. contactor solenoid, 15-forward A.C. contactor solenoid; 16-Opposed crossing contactor solenoid; the 17-protection detects relay with phase order of 3-phase AC and phase shortage, and the 171-protection detects normally open contact, and the 172-protection detects normally closed interlock; 18-protection A.C. contactor normally open contact, 19-three-phase alternating-current motor.
Embodiment
The automatic commutation open-phase protection of the utility model three-phase alternating-current motor instrument, electric logical schematic as shown in Figure 1, electric principle schematic is as shown in Figure 2.In the most basic execution mode; the automatic commutation open-phase protection of three-phase alternating-current motor instrument comprises switch 1; three-phase fuse 2 and phase order of 3-phase AC and phase shortage detect relay 9; the three-phase detection end that phase order of 3-phase AC and phase shortage detect relay 9 is electrically connected with the three-phase alternating current power supply circuits of three-phase alternating-current motor; phase order of 3-phase AC and phase shortage detect relay 9 and are provided with detection normally open contact 91; under the phase sequence of three-phase alternating current state normal and not phase shortage, detect normally open contact 91 closures; the power supply circuits that detect normally open contact 91 and A.C. contactor solenoid are connected in series, and the power supply circuits of the normally open contact of A.C. contactor and three-phase alternating-current motor 19 are connected in series.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; protection be can be provided with and relay 17 and protection A.C. contactor detected with phase order of 3-phase AC and phase shortage; the three-phase detection end that protection detects relay 17 with phase order of 3-phase AC and phase shortage is arranged on after the normally open contact of A.C. contactor; protection detects relay 17 with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact 171; protection detects normally open contact 171 closures under the phase sequence of three-phase alternating current state normal and not phase shortage; protection detects normally open contact 171 and is connected in series with the power supply circuits of protection with A.C. contactor solenoid 14, and protection is connected in series with the power supply circuits of A.C. contactor normally open contact 18 with three-phase alternating-current motor 19.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; can be provided with auxiliary relay; the forward A.C. contactor; the Opposed crossing contactor; protection detects relay 17 and protection A.C. contactor with phase order of 3-phase AC and phase shortage; normally open contact 111 and middle normally closed interlock 112 in the middle of auxiliary relay is provided with; the power supply circuits that detect normally open contact 91 and auxiliary relay solenoid 11 are connected in series; middle normally open contact 111 is connected in series with the power supply circuits of forward A.C. contactor solenoid 15; middle normally closed interlock 112 is connected in series with the power supply circuits of Opposed crossing contactor solenoid 16; forward A.C. contactor normally open contact 12 and Opposed crossing contactor normally open contact 13 are connected in parallel; and be connected in series with the power supply circuits of three-phase alternating-current motor 19 respectively; wherein forward A.C. contactor and Opposed crossing contactor respectively have being connected in series of power supply circuits of 2 forward A.C. contactor normally open contacts 12 and 2 Opposed crossing contactor normally open contacts 13 and three-phase alternating-current motor 19 to be being connected in series of negative-phase sequence mutually; protection is arranged on the normally open contact of A.C. contactor (when 1 A.C. contactor only is set) with the three-phase detection end of phase order of 3-phase AC and phase shortage detection relay 17; or after forward A.C. contactor normally open contact 12 and the Opposed crossing contactor normally open contact 13; and be electrically connected with the three phase supply circuit of three-phase alternating-current motor 19; protection detects relay 17 with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact 171; protection detects normally open contact 171 closures under the phase sequence of three-phase alternating current state normal and not phase shortage; protection detects normally open contact 171 and is connected in series with the power supply circuits of protection with A.C. contactor solenoid 14, and protection is connected in series with the power supply circuits of A.C. contactor normally open contact 18 with three-phase alternating-current motor 19.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; can also be provided with the protection auxiliary relay; protection detects the three-phase detection end of relay 17 with phase order of 3-phase AC and phase shortage; be arranged on after forward A.C. contactor normally open contact 12 and the Opposed crossing contactor normally open contact 13; and be electrically connected with the three phase supply circuit of three-phase alternating-current motor 19; protection detects normally open contact 171 with the protection that phase order of 3-phase AC and phase shortage detect relay 17; protection detects normally open contact 171 closures under the phase sequence of three-phase alternating current state normal and not phase shortage; protection detects normally open contact 171 and is connected in series with the power supply circuits of protection with auxiliary relay solenoid 10; protection is provided with the middle normally open contact 101 of protection with auxiliary relay; normally open contact 101 is connected in series with the power supply circuits of protection with A.C. contactor solenoid 14 in the middle of the protection, and protection is connected in series with the power supply circuits of A.C. contactor normally open contact 18 with three-phase alternating-current motor 19.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with phase sequence forward display unit 7 and phase sequence and oppositely reach phase shortage display unit 8; show normally open contact 113 and the middle normally closed interlock 114 that shows in the middle of auxiliary relay is provided with, middle normally open contact 113 and the middle normally closed interlock 114 that shows of showing is connected in series with the power supply circuits that phase sequence forward display unit 7 and phase sequence oppositely reach phase shortage display unit 8 respectively.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; phase sequence forward display unit 7 and phase sequence oppositely reach phase shortage display unit 8 can also adopt another kind of control mode; forward A.C. contactor and Opposed crossing contactor are respectively equipped with forward and show normally open contact and oppositely show normally open contact, and forward shows normally open contact and shows that oppositely normally open contact is connected in series with the power supply circuits that phase sequence forward display unit 7 and phase sequence oppositely reach phase shortage display unit 8 respectively.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with warning device 4; warning device 4 is acoustic warning devices; or light alarming device; or the sound, light alarming device; protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally closed interlock 172, and protection detection normally closed interlock 172 is connected in series with the power supply circuits of warning device 4.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument, warning device 4 can also adopt another kind of control mode, and protection is provided with warning normally closed interlock 102 with auxiliary relay, and warning normally closed interlock 102 is connected in series with the power supply circuits of warning device 4.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with safe voltage feedway 6; safe voltage feedway 6 comprises battery 61 and single-phase fuse 5; battery 61 is recommended to use rechargeable battery, and the power supply circuits that phase sequence forward display unit 7, phase sequence oppositely reach phase shortage display unit 8 and warning device 4 are electrically connected with safe voltage feedway 6.
The automatic commutation open-phase protection of three-phase alternating-current motor instrument; be provided with electric power conversion apparatus 3; electric power conversion apparatus 3 comprise input, output, transformer, rectifier or and pressurizer, input is electrically connected with AC power, output is electrically connected with safe voltage feedway 6.
The automatic commutation open-phase protection of the utility model three-phase alternating-current motor instrument is not restricted to the described embodiments, and every structure of the present utility model and mode utilized is through conversion and the formed technical scheme of replacement, all in protection range of the present utility model.
Claims (10)
1. the automatic commutation open-phase protection of three-phase alternating-current motor instrument; comprise switch; fuse; phase order of 3-phase AC and phase shortage detect relay and A.C. contactor; it is characterized in that: the three-phase detection end that phase order of 3-phase AC and phase shortage detect relay is electrically connected with the three-phase alternating current power supply circuits of three-phase alternating-current motor; described phase order of 3-phase AC and phase shortage detect relay and are provided with the detection normally open contact; described detection normally open contact closure under the phase sequence of three-phase alternating current state normal and not phase shortage; the power supply circuits of described detection normally open contact and A.C. contactor solenoid are connected in series, and the normally open contact of described A.C. contactor and the power supply circuits of three-phase alternating-current motor are connected in series.
2. the automatic commutation open-phase protection of three-phase alternating-current motor according to claim 1 instrument; it is characterized in that: be provided with protection and detect relay and protection A.C. contactor with phase order of 3-phase AC and phase shortage; the three-phase detection end that described protection detects relay with phase order of 3-phase AC and phase shortage is arranged on after the normally open contact of A.C. contactor; described protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact; described protection detects the normally open contact closure under the phase sequence of three-phase alternating current state normal and not phase shortage; described protection detects normally open contact and is connected in series with the power supply circuits of protection with the A.C. contactor solenoid, and protection is connected in series with the normally open contact of A.C. contactor and the power supply circuits of three-phase alternating-current motor.
3. the automatic commutation open-phase protection of three-phase alternating-current motor according to claim 1 instrument; it is characterized in that: be provided with auxiliary relay; the forward A.C. contactor; the Opposed crossing contactor; protection detects relay and protection A.C. contactor with phase order of 3-phase AC and phase shortage; normally open contact and middle normally closed interlock in the middle of described auxiliary relay is provided with; the power supply circuits of described detection normally open contact and described auxiliary relay solenoid are connected in series; the power supply circuits of normally open contact and described forward A.C. contactor solenoid are connected in series in the middle of described; the power supply circuits of normally closed interlock and described Opposed crossing contactor solenoid are connected in series in the middle of described; the normally open contact of the normally open contact of described forward A.C. contactor and Opposed crossing contactor is connected in parallel; and be connected in series with the power supply circuits of three-phase alternating-current motor respectively; wherein forward A.C. contactor and Opposed crossing contactor; respectively there be being connected in series of power supply circuits of 2 normally open contacts and three-phase alternating-current motor to be being connected in series of negative-phase sequence mutually; the three-phase detection end that described protection detects relay with phase order of 3-phase AC and phase shortage is arranged on after the normally open contact of forward A.C. contactor and Opposed crossing contactor; and be electrically connected with the three phase supply circuit of three-phase alternating-current motor; described protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact; described protection detects the normally open contact closure under the phase sequence of three-phase alternating current state normal and not phase shortage; described protection detects normally open contact and is connected in series with the power supply circuits of protection with the A.C. contactor solenoid, and protection is connected in series with the normally open contact of A.C. contactor and the power supply circuits of three-phase alternating-current motor.
4. the automatic commutation open-phase protection of three-phase alternating-current motor according to claim 3 instrument; it is characterized in that: be provided with protection and detect relay with phase order of 3-phase AC and phase shortage; protection is used A.C. contactor with auxiliary relay with protecting; described protection detects the three-phase detection end of relay with phase order of 3-phase AC and phase shortage; be arranged on after the normally open contact of the normally open contact of forward A.C. contactor and Opposed crossing contactor; and be electrically connected with the three phase supply circuit of three-phase alternating-current motor; described protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally open contact; described protection detects the normally open contact closure under the phase sequence of three-phase alternating current state normal and not phase shortage; described protection detects normally open contact and is connected in series with the power supply circuits of protection with the auxiliary relay solenoid; described protection is provided with the middle normally open contact of protection with auxiliary relay; normally open contact is connected in series with the power supply circuits of protection with the A.C. contactor solenoid in the middle of the described protection, and protection is connected in series with the normally open contact of A.C. contactor and the power supply circuits of three-phase alternating-current motor.
5. the automatic commutation open-phase protection of three-phase alternating-current motor according to claim 3 instrument; it is characterized in that: be provided with phase sequence forward display unit and phase sequence and oppositely reach the phase shortage display unit; show normally open contact and the middle normally closed interlock that shows in the middle of described auxiliary relay is provided with, show that normally open contact and the middle normally closed interlock that shows are connected in series with the power supply circuits that phase sequence forward display unit and phase sequence oppositely reach the phase shortage display unit respectively in the middle of described.
6. the automatic commutation open-phase protection of three-phase alternating-current motor according to claim 3 instrument; it is characterized in that: be provided with phase sequence forward display unit and phase sequence and oppositely reach the phase shortage display unit; described forward A.C. contactor and Opposed crossing contactor are respectively equipped with forward and show normally open contact and oppositely show normally open contact, and described forward shows normally open contact and shows that oppositely normally open contact is connected in series with the power supply circuits that phase sequence forward display unit and phase sequence oppositely reach the phase shortage display unit respectively.
7. the automatic commutation open-phase protection of three-phase alternating-current motor according to claim 2 instrument; it is characterized in that: be provided with warning device; described warning device is an acoustic warning device; or light alarming device; or the sound, light alarming device; described protection detects relay with phase order of 3-phase AC and phase shortage and is provided with protection detection normally closed interlock, and the power supply circuits that described protection detects normally closed interlock and described warning device are connected in series.
8. the automatic commutation open-phase protection of three-phase alternating-current motor according to claim 4 instrument; it is characterized in that: be provided with warning device; described warning device is an acoustic warning device; or light alarming device; or the sound, light alarming device; described protection is provided with the warning normally closed interlock with auxiliary relay, and the power supply circuits of described warning normally closed interlock and described warning device are connected in series.
9. according to claim 5,6, the automatic commutation open-phase protection of 7 and 8 described three-phase alternating-current motors instrument; it is characterized in that: be provided with the safe voltage feedway; described safe voltage feedway comprises battery, and the power supply circuits that described phase sequence forward display unit, phase sequence oppositely reach phase shortage display unit and warning device are electrically connected with described safe voltage feedway.
10. according to claim 5,6, the automatic commutation open-phase protection of 7 and 8 described three-phase alternating-current motors instrument; it is characterized in that: be provided with electric power conversion apparatus; described electric power conversion apparatus be provided with input, output, transformer, rectifier or and pressurizer; input is electrically connected with AC power, and output is electrically connected with the safe voltage feedway.
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| CN201020121698XU CN201616661U (en) | 2010-02-26 | 2010-02-26 | Three-phase alternating current motor automatic phase-conversion default-phase protecting instrument |
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| CN201020121698XU CN201616661U (en) | 2010-02-26 | 2010-02-26 | Three-phase alternating current motor automatic phase-conversion default-phase protecting instrument |
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| CN104158148A (en) * | 2014-07-31 | 2014-11-19 | 国家电网公司 | Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine |
| CN105509395A (en) * | 2014-10-09 | 2016-04-20 | 东芝开利株式会社 | Moveable cold insulation box and moveable cold insulation box system |
| CN110398639A (en) * | 2019-08-12 | 2019-11-01 | 合肥天鹅制冷科技有限公司 | A kind of three-phase alternating current adjust automatically detection circuit |
| CN113533828A (en) * | 2021-08-12 | 2021-10-22 | 中车青岛四方机车车辆股份有限公司 | Detection device for power supply circuit of three-phase motor and power supply system |
-
2010
- 2010-02-26 CN CN201020121698XU patent/CN201616661U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158148A (en) * | 2014-07-31 | 2014-11-19 | 国家电网公司 | Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine |
| CN105509395A (en) * | 2014-10-09 | 2016-04-20 | 东芝开利株式会社 | Moveable cold insulation box and moveable cold insulation box system |
| CN110398639A (en) * | 2019-08-12 | 2019-11-01 | 合肥天鹅制冷科技有限公司 | A kind of three-phase alternating current adjust automatically detection circuit |
| CN113533828A (en) * | 2021-08-12 | 2021-10-22 | 中车青岛四方机车车辆股份有限公司 | Detection device for power supply circuit of three-phase motor and power supply system |
| CN113533828B (en) * | 2021-08-12 | 2024-05-07 | 中车青岛四方机车车辆股份有限公司 | Detection device and power supply system of power supply circuit of three-phase motor |
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