CN202957580U - Phase sequence protection device for motor of centrifugal machine - Google Patents
Phase sequence protection device for motor of centrifugal machine Download PDFInfo
- Publication number
- CN202957580U CN202957580U CN 201220681241 CN201220681241U CN202957580U CN 202957580 U CN202957580 U CN 202957580U CN 201220681241 CN201220681241 CN 201220681241 CN 201220681241 U CN201220681241 U CN 201220681241U CN 202957580 U CN202957580 U CN 202957580U
- Authority
- CN
- China
- Prior art keywords
- phase
- motor
- protection relay
- relay
- centrifugal machine
- 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.)
- Expired - Fee Related
Links
Landscapes
- Centrifugal Separators (AREA)
Abstract
The utility model discloses a phase sequence protection device for a motor of a centrifugal machine. The phase sequence protection device comprises the centrifugal machine driven by the motor. The motor is a three-phase motor. A control circuit of the motor is connected with a controller. The controller comprises a misphase protection relay, an open phase protection relay and an over-voltage protection relay. The misphase protection relay is provided with a misphase indicator lamp. The open phase protection relay is provided with an open phase indicator lamp. The over-voltage protection relay is provided with an over-voltage indicator lamp. The phase sequence protection device has the advantages that potential safety hazards caused by misphase, open phase and over-voltage and damage to the centrifugal machine are avoided, and the working safety and reliability of the centrifugal machine are effectively improved.
Description
Technical field
This utility model relates to a kind of phase sequence protective device of computer, particularly a kind of centrifugal motor phase sequence protective device of computer.
Background technology
Centrifuge is mainly used in the solid particle in suspension and liquid are separated; Or, by two kinds of density differences in emulsion, immiscible liquid separately again.Often utilize the moisture in the centrifuge oil and water separation in industry, the driving of centrifuge is to be driven by three phase electric machine.But the drive motors of centrifuge can the entanglement of three characteristics of the middle term power phase cause the loosening generation casualty accident that flies out of rotary drum inner member when initial start, and to equipment, operation brings potential safety hazard; In running, three phase mains can cause drive motors to burn because of phase shortage and voltage overrate, to the user, brings economic loss.
Summary of the invention
Goal of the invention: the purpose of this utility model is to provide a kind of potential safety hazard that can avoid centrifugal motor to cause because of phase sequence entanglement or phase shortage and the centrifugal motor phase sequence protective device of computer of burn-down of electric motor.
Technical scheme: a kind of centrifugal motor phase sequence protective device of computer, comprise by motor-driven centrifuge, described motor is three phase electric machine, and the control circuit of described motor is connected with controller, and described controller comprises fault-phase protection relay, phase failure relay and overvoltage protection relay; Described fault-phase protection relay is provided with the misphase indicator light, and phase failure relay is provided with disconnected phase indicator light, and described overvoltage protection relay is provided with the overvoltage indicator light.
Operation principle: if when centrifuge starts generation three-phase power supply phase sequence entanglement phenomenon; the fault-phase protection actuating of relay is cut off centrifugal motor power supply while misphase indicator light and is lighted; phase sequence entanglement while reminding operating personnel to start; operating personnel restart after adjusting correctly, have effectively avoided the loosening accident of hurting sb.'s feelings that flies out of element in rotary drum to occur.While occurring power phase shortage or voltage over the safety value scope in the centrifuge running; phase failure relay or the overvoltage protection actuating of relay are cut off the electricity supply; disconnected phase indicator light or overvoltage indicator light light simultaneously; corresponding problem has occurred in alert, after the problem for the treatment of solves, can restart centrifuge.
Beneficial effect: the potential safety hazard that the utility model has avoided centrifuge to cause due to phase sequence entanglement, phase shortage or overtension and the generation of device damage problem, improved the safety and reliability of centrifuge work effectively.
The accompanying drawing explanation
Fig. 1 is the utility model control principle drawing
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in the figure, a kind of centrifugal motor phase sequence protective device of computer, comprise the centrifuge 2 driven by motor 1, described motor 1 is three phase electric machine, the control circuit of described motor 1 is connected with controller 3, and described controller 3 comprises fault-phase protection relay 4, phase failure relay 5 and overvoltage protection relay 6; Described fault-phase protection relay 4 is provided with misphase indicator light 7, and phase failure relay 5 is provided with disconnected phase indicator light 8, and described overvoltage protection relay 6 is provided with overvoltage indicator light 9.
When if centrifuge 2 starts generation three-phase power supply phase sequence entanglement phenomenon; 4 actions of fault-phase protection relay are cut off 21 power supplys while of motor of centrifuge misphase indicator light 7 and are lighted; phase sequence entanglement while reminding operating personnel to start; operating personnel restart after adjusting correctly, have effectively avoided the loosening accident of hurting sb.'s feelings that flies out of element in rotary drum to occur.While occurring power phase shortage or voltage over the safety value scope in centrifuge 2 runnings; phase failure relay 5 or overvoltage protection relay 6 action power dumps; disconnected phase indicator light 8 or overvoltage indicator light 9 light simultaneously; corresponding problem has occurred in alert, after the problem for the treatment of solves, can restart centrifuge 2.
Claims (1)
1. a centrifugal motor phase sequence protective device of computer, comprise the centrifuge (2) driven by motor (1), described motor (1) is three phase electric machine, it is characterized in that: the control circuit of described motor (1) is connected with controller (3), and described controller (3) comprises fault-phase protection relay (4), phase failure relay (5) and overvoltage protection relay (6); Described fault-phase protection relay (4) is provided with misphase indicator light (7), and phase failure relay (5) is provided with disconnected phase indicator light (8), and described overvoltage protection relay (6) is provided with overvoltage indicator light (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681241 CN202957580U (en) | 2012-12-12 | 2012-12-12 | Phase sequence protection device for motor of centrifugal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681241 CN202957580U (en) | 2012-12-12 | 2012-12-12 | Phase sequence protection device for motor of centrifugal machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202957580U true CN202957580U (en) | 2013-05-29 |
Family
ID=48463132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220681241 Expired - Fee Related CN202957580U (en) | 2012-12-12 | 2012-12-12 | Phase sequence protection device for motor of centrifugal machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202957580U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066562A (en) * | 2012-12-12 | 2013-04-24 | 镇江市科能电力设备有限公司 | Phase sequence protective device for centrifugal machine and motor |
-
2012
- 2012-12-12 CN CN 201220681241 patent/CN202957580U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066562A (en) * | 2012-12-12 | 2013-04-24 | 镇江市科能电力设备有限公司 | Phase sequence protective device for centrifugal machine and motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202931816U (en) | Safety control device of intelligent hay mower | |
| CN202957580U (en) | Phase sequence protection device for motor of centrifugal machine | |
| CN103240659A (en) | Angle grinder with power-off protection and circuit of angle grinder | |
| CN105226614B (en) | safe and reliable DC motor control system and control method | |
| CN103066562A (en) | Phase sequence protective device for centrifugal machine and motor | |
| CN202951573U (en) | Centrifugal oil purification system with power supply protective device | |
| CN203197710U (en) | Angle grinder with power failure protection function and circuit for angle grinder | |
| CN104329396A (en) | Braking device for electromagnetic speed regulation electric motor | |
| CN204794028U (en) | Intellectuality ac motor protector that is just reversing | |
| CN103410661B (en) | A kind of device of putting away the oars exchanging variable-pitch control system | |
| CN201905046U (en) | Plastic belt disc mower with battery terminal protecting device | |
| CN203151064U (en) | Working circuit used for safety relay | |
| CN202475330U (en) | Alarm for preventing motor from being started by mistake | |
| CN202940762U (en) | Dual-drive brushless electrical machine controller | |
| CN204905072U (en) | Earthing switch electrically -operated device for high tension switchgear | |
| CN203968026U (en) | Electromagnetic speed-adjusting threephase asynchronous machine | |
| CN203733718U (en) | Wide voltage electromagnetic contactor control circuit with low voltage ride-through function | |
| CN103056042A (en) | Centrifugal oil purification system with power supply protecting device | |
| CN204407980U (en) | A kind of electric discharge device of Large Copacity high-voltage capacitance | |
| CN104538934B (en) | It is a kind of for starting the monitoring and protective device of motor | |
| CN104033369A (en) | Stepless speed regulation control system of electric high-pressure water pump | |
| CN202261159U (en) | Safe dragging system of high voltage elevator | |
| CN203256463U (en) | No-load automatic power cut power saving device for industrial sewing machine | |
| CN206323130U (en) | Multistage centrifugal pump rotor axial displacement motor protecter | |
| CN204206039U (en) | A kind of two-phase inversion three-phase brushless permanent-magnet electric motor system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20141212 |
|
| EXPY | Termination of patent right or utility model |