CN104716632A - Three-phase motor phase sequence protection device for elevators - Google Patents
Three-phase motor phase sequence protection device for elevators Download PDFInfo
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- CN104716632A CN104716632A CN201310678276.0A CN201310678276A CN104716632A CN 104716632 A CN104716632 A CN 104716632A CN 201310678276 A CN201310678276 A CN 201310678276A CN 104716632 A CN104716632 A CN 104716632A
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- phase sequence
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a three-phase motor phase sequence protection device for elevators, comprising a three-phase power supply, a 220V alternating-current power supply, first to third fuses, a lamp, a loudspeaker, a motor, a normally closed button switch, a normally open button switch, a contactor, and a phase sequence protector. When the three-phase power supply is normal, the phase sequence protector is in a pulled-in state. When the phase sequence of the motor is in disorder during operation because of some reasons, the phase sequence protector is released immediately, a normally open contact switch of the phase sequence protector is switched off, the contactor is released, the three-phase power supply of the motor is cut off to protect the motor, a normally closed contact switch of the phase sequence protector is switched on, the lamp goes on, and the loudspeaker sounds. Before the motor is started, if the three-phase power supply has phase lack, phase dislocation or other abnormalities, the protection device can also prevent the motor from being started and can sound an alarm. When the phase sequence is in disorder, the three-phase power supply is cut off automatically to protect the motor, and a sound and light alarm signal can be sent out. The three-phase motor phase sequence protection device for elevators is simple in structure and low in cost.
Description
Technical field
The present invention relates to a kind of protective device of elevator, particularly relate to a kind of three-phase electric machine phase sequence protective device for elevator.
Background technology
Along with the development of urban construction, skyscraper is on the increase, elevator has a wide range of applications in national economy and life, elevator is inseparable with daily life as the vehicles run vertical in skyscraper, if when elevator network system due to accidentally cause when maintainer overhauls the phase sequence of three phase mains and former phase sequence different time, the original traffic direction of elevator just may be made to change to contrary direction, cause great danger can to like this operation of elevator, bring hardly imaginable consequence, so phase sequence protective device of computer is very crucial in the link ensureing elevator safety operation.But traditional phase sequence protective device of computer complex structure, cost is higher.
Summary of the invention
Object of the present invention is just to provide a kind of three-phase electric machine phase sequence protective device for elevator to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose: a kind of three-phase electric machine phase sequence protective device for elevator, comprise three phase mains, 220V AC power, first fuse is to the 3rd fuse, lamp, loud speaker, motor, normally closed key switch, often open key switch, contactor and phase sequence relay, the first-phase line end of described three phase mains is connected with the first end of described first fuse, the second-phase line end of described three phase mains is connected with the first end of described second fuse, the third phase line end of described three phase mains is connected with the first end of described 3rd fuse, second end of described first fuse respectively with the first-phase line end of described phase sequence relay, the described first end often opening key switch, the first end of the first normally opened contact of described contactor is connected with the first end of the second normally opened contact of described contactor, second end of the first normally opened contact of described contactor is connected with the first end of described the second end and described normally closed key switch of often opening key switch respectively, second end of described normally closed key switch is connected with the first end of the normally opened contact switch of described phase sequence relay, second end of the normally opened contact switch of described phase sequence relay is connected with the first end of described contactor, second end of described contactor respectively with the second end of described second fuse, the second-phase line end of described phase sequence relay is connected with the first end of the 3rd normally opened contact of described contactor, the third phase line end of described phase sequence relay is connected with the first end of the second end of described 3rd fuse and the 4th normally opened contact of described contactor respectively, described motor respectively with the second end of the 4th normally opened contact of described contactor, second end of the 3rd normally opened contact of described contactor is connected with the second end of the second normally opened contact of described contactor, the first end of described 220V AC power is connected with the first end of the normally-closed contact switch of described phase sequence relay, second end of the normally-closed contact switch of described phase sequence relay is connected with the first end of described lamp and the first end of described loud speaker respectively, second end of described loud speaker is connected with the second end of described lamp and the second end of described 220V AC power respectively.
Beneficial effect of the present invention is: the present invention is a kind of three-phase electric machine phase sequence protective device for elevator, automatically can cut off three phase mains when phase sequence entanglement, protection motor, and can send sound and light alarm signal, and structure is simple, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of three-phase electric machine phase sequence protective device for elevator of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described: as shown in Figure 1, a kind of three-phase electric machine phase sequence protective device for elevator of the present invention, comprise three phase mains AC1, 220V AC power AC2, first fuse FU1 is to the 3rd fuse FU3, lamp L, loud speaker BY, motor M, normally closed key switch SB1, often open key switch SB2, contactor K and phase sequence relay J, the first-phase line end of three phase mains AC1 is connected with the first end of the first fuse FU1, the second-phase line end of three phase mains AC1 is connected with the first end of the second fuse FU2, the third phase line end of three phase mains AC1 is connected with the first end of the 3rd fuse FU3, second end of the first fuse FU1 respectively with the first-phase line end of phase sequence relay J, often open the first end of key switch SB2, the first end of the first normally opened contact K1 of contactor K is connected with the first end of the second normally opened contact K2 of contactor K, second end of the first normally opened contact K1 of contactor K is connected with the first end of the second end and normally closed key switch SB1 of often opening key switch SB2 respectively, second end of normally closed key switch SB1 is connected with the first end of the normally opened contact switch J1 of phase sequence relay J, second end of the normally opened contact switch J1 of phase sequence relay J is connected with the first end of contactor K, second end of contactor K respectively with second end of the second fuse FU2, the second-phase line end of phase sequence relay J is connected with the first end of the 3rd normally opened contact K3 of contactor K, the third phase line end of phase sequence relay J is connected with the first end of second end of the 3rd fuse FU3 and the 4th normally opened contact K4 of contactor K respectively, motor M respectively with second end of the 4th normally opened contact K4 of contactor K, second end of the 3rd normally opened contact K3 of contactor K is connected with second end of the second normally opened contact K2 of contactor K, the first end of 220V AC power AC2 is connected with the first end of the normally-closed contact switch J2 of phase sequence relay J, second end of the normally-closed contact switch J2 of phase sequence relay J is connected with the first end of lamp L and the first end of loud speaker BY respectively, second end of loud speaker BY is connected with second end of lamp L and second end of 220V AC power AC2 respectively.
Normally closed key switch SB1, often opening key switch SB2 and contactor K and form motor M control device, controlling operation and the stopping of motor M by often opening key switch SB2 and normally closed key switch SB1.When three phase mains AC1 is normal, phase sequence relay J is in attracting state; if when motor M operationally causes phase sequence entanglement for a certain reason; phase sequence relay J discharges immediately; the normally opened contact switch J1 of phase sequence relay J disconnects, and contactor K discharges, and cuts off the three phase mains AC1 of motor M; thus play the effect of protection motor M; the normally-closed contact switch J2 of phase sequence relay J connects simultaneously, and lamp L is bright, loud speaker BY sounding.If start three-phase power supply AC1 in motor M have the abnormal conditions such as phase shortage, misphase, protective device also can prevent motor M from starting, and can alarm.
Claims (1)
1. the three-phase electric machine phase sequence protective device for elevator, it is characterized in that: comprise three phase mains, 220V AC power, first fuse is to the 3rd fuse, lamp, loud speaker, motor, normally closed key switch, often open key switch, contactor and phase sequence relay, the first-phase line end of described three phase mains is connected with the first end of described first fuse, the second-phase line end of described three phase mains is connected with the first end of described second fuse, the third phase line end of described three phase mains is connected with the first end of described 3rd fuse, second end of described first fuse respectively with the first-phase line end of described phase sequence relay, the described first end often opening key switch, the first end of the first normally opened contact of described contactor is connected with the first end of the second normally opened contact of described contactor, second end of the first normally opened contact of described contactor is connected with the first end of described the second end and described normally closed key switch of often opening key switch respectively, second end of described normally closed key switch is connected with the first end of the normally opened contact switch of described phase sequence relay, second end of the normally opened contact switch of described phase sequence relay is connected with the first end of described contactor, second end of described contactor respectively with the second end of described second fuse, the second-phase line end of described phase sequence relay is connected with the first end of the 3rd normally opened contact of described contactor, the third phase line end of described phase sequence relay is connected with the first end of the second end of described 3rd fuse and the 4th normally opened contact of described contactor respectively, described motor respectively with the second end of the 4th normally opened contact of described contactor, second end of the 3rd normally opened contact of described contactor is connected with the second end of the second normally opened contact of described contactor, the first end of described 220V AC power is connected with the first end of the normally-closed contact switch of described phase sequence relay, second end of the normally-closed contact switch of described phase sequence relay is connected with the first end of described lamp and the first end of described loud speaker respectively, second end of described loud speaker is connected with the second end of described lamp and the second end of described 220V AC power respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310678276.0A CN104716632A (en) | 2013-12-14 | 2013-12-14 | Three-phase motor phase sequence protection device for elevators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310678276.0A CN104716632A (en) | 2013-12-14 | 2013-12-14 | Three-phase motor phase sequence protection device for elevators |
Publications (1)
| Publication Number | Publication Date |
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| CN104716632A true CN104716632A (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310678276.0A Pending CN104716632A (en) | 2013-12-14 | 2013-12-14 | Three-phase motor phase sequence protection device for elevators |
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| CN (1) | CN104716632A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026030A (en) * | 2016-05-13 | 2016-10-12 | 南京铁道职业技术学院 | Traction elevator three-phase AC phase sequence protector and protection method |
| CN113156227A (en) * | 2021-03-31 | 2021-07-23 | 江西泰豪智能电力科技有限公司 | Phase sequence detection control circuit and shore power control device |
| CN113659915A (en) * | 2021-07-28 | 2021-11-16 | 珠海格力电器股份有限公司 | Motor, motor pre-protection control method and pre-protection system |
-
2013
- 2013-12-14 CN CN201310678276.0A patent/CN104716632A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026030A (en) * | 2016-05-13 | 2016-10-12 | 南京铁道职业技术学院 | Traction elevator three-phase AC phase sequence protector and protection method |
| CN106026030B (en) * | 2016-05-13 | 2018-12-04 | 南京铁道职业技术学院 | A kind of towed elevator phase order of 3-phase AC protector and guard method |
| CN113156227A (en) * | 2021-03-31 | 2021-07-23 | 江西泰豪智能电力科技有限公司 | Phase sequence detection control circuit and shore power control device |
| CN113659915A (en) * | 2021-07-28 | 2021-11-16 | 珠海格力电器股份有限公司 | Motor, motor pre-protection control method and pre-protection system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150617 |
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| WD01 | Invention patent application deemed withdrawn after publication |