Lamps and lanterns, ceiling installation does not conform to the requirements

 small motor spares suppliers of motor parts 
Specifications
1.20 years fan&motor manufactruer 
2.We can open mould&punch&diecast&finish&winding 
3.competitive price,high quality 

1, phenomenon (l), lamp installation deviation, not on the center point. (2), the levelness of the rows of lamps and lanterns, straightness error is bigger. (3), chain hoist, chain is not parallel to the fluorescent lamp, under the diesel engine guide wire is not made up again. (4), ceiling fan hook with rebar processing, molding is poor; Bell doesn't absorb top, junction box appears. (5), large balcony lamp chassis plate, rust. (6) Jane lamp hole greatly, smallpox condole top, not neat. 2, root cause analysis (l), embedded lamp box when the position is wrong, wrong, install lamps and lanterns without to www.dongfeng-motor.com take remedial measures. (2), construction people curse is not strong sense of electric water pump responsibility, construction and acceptance of the existing norms, quality inspection evaluation standard are not familiar with. (3), buyer buy lamps and lanterns covet xuan, ignoring quality; 3 phase induction motor (4) was not set well, canister lamp hole size, do not have a unified nation, round hole diameter, etc. 3, preventive measures (l), before the installation of lamps and lanterns, should seriously find center, rectify the deviation. (2), according to French, rows of lamps and lanterns installation deviation should not be greater than 5 mm, therefore, need to stay in the construction of localization, the lamps and lanterns in vertical, horizontal, oblique and Lord with low levels are in a straight ac synchronous generator line. 


three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW

Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years 
(3), fluorescent lamp chain hoist should be straight, not appear eight word, under the wire guide should with chain hoist plait fork. (4), embedded ceiling hooks, application of not single phase induction motor less than 8 Ф galvanized round steel reinforced fixed together with the plate and are not allowed to use rebar, processing and shaping hook should be consistent, and brush antirust paint. Bell can suck the top ceiling fans and will hook and the junction box cover. Rows of ceiling fan should be in a straight line, deviation of 5 mm or less. (5), the balcony iron plate thickness of 0.5 mm or more lamps ac synchronous generator and lanterns at the bottom of the box, and the paint surface is smooth, can play the role of rust; The glass can't be too thin, so as to avoid rupture during installation. (6), smallpox condole top tube light opening first shall be good coordinates, in addition to the required straight, neat and equally, the size of the hole should conform to the specifications of the diesel engine canister light, not too big, to acmotor2.blogspot.com ensure that the outer ring when the tube lamp installed firmly against condole top, not crack. (7), construction personnel, procurement staff to carefully implement the relevant state and local regulations.

Common fault analysis and maintenance - running motor fault analysis

 Has swept chamber, vibration, mechanical bearing overheating and damage failure. Asynchronous motor, air gap between rotor is small, easy to cause, collision between the rotor. General because indoor end cover shaft hole wear or stop end cover mouth and base check mouth wear deformation, make the stand, end cover, single phase ac motor rotor misalignment caused chamber. Vibration should be distinguish is caused by the motor itself, or poor transmission device, or a mechanical load transfer, and then ruled out according to specific conditions. Belong to cause the vibration of the motor itself, mostly due to the rotor dynamic balance is not good, bad and bearing, shaft bending, or end cover, frame, rotor misalignment, or motor installation of foundation, installation does not reach the designated position, loose fasteners. Vibration can produce noise, will also generate additional load. Motor after electrify found speed to slow, analyze its reasons in many aspects, capacitor start motor capacity lack serious leakage, whether the capacitor voltage is too low, or a squirrel cage rotor article aluminum parts have a serious accident shrinkage cavity, breaks, and so three phase asynchronous motor on and so forth, especially the washing machine motor starting and positive and negative work alternately, often make article turned aluminum induced current big and make electromagnetic electricalmotor1.blogspot.com force increases, all can produce turned aluminum strip break, resulting in slow running to, serious when make the rotor fever and edm and burn winding lines).

The role of current transformer, current transformer

 generator Stator Rotor 
Specifications
1. 20 years manufacturing experience
2. competitive price,high quality
3. Accessories Series: stator and rotor
 Can the function of current transformer is the numerical larger current through a variable than convert numerical smaller secondary current, used for protection, measurement and other purposes. If change ratio of 400/5 of the current transformer, which can transform the actual for 400 a current of 5 a current. 1 principle of selection and inspection of current transformer) current transformers rated voltage is not less than the rated voltage instruction in line; 2) a load calculation according to the current IC choose current transformer changes; 3) choose according to the requirements of the secondary loop current transformer accuracy and calibration accuracy; 4) check dynamic stability and thermal stability. 


Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor

Specifications
power range: 0.12-18.5 kW 
Centre height of frame: 63-160 mm 
Rated Voltage: 380 V 

Rated Frequency: 50Hz or 60Hz 
2 current transformer converter than choice. Current transformer is a rated current I1n and the ratio of the secondary rated current I2n, called a current transformer rated current transformer ratio, Ki = I1n/I2n material N2 / N1. Type, N1 and N2 for current transformer primary winding and secondary winding turns. Current transformer primary side than rated current standard (e.g., 20, 30, 40, 50, 75, 100, 75, 2 (A) xa/C) wait for A variety of specifications, the secondary side current rating is usually 1 A or 5 A. Says the same two xa/C products have two kinds of current ratio, by changing the product at the top of the oil storage tank outside the connector wiring way, when the series current ratio of a/C, parallel 3 phase induction motor current ratio of 2 xa/C. In general, the choice of measurement with ct (current transformer) current transformer ratio should make one times rated current I1n not less than the load current in a circuit (IC). Such as load calculation in Induction motor line current is 350 a, the converter of current transformer ratio ac fan motor should choose 400/5. Protect with current transformer to ensure its accuracy requirement, can be changed than done.

Motor common faults

 Common faults of three phase asynchronous motor are swept rotor chamber,vibration,winding turns or short circuit between the layers,winding grounding,stator winding lack of phase operation,the reverse of the stator winding unbalanced three phase current,core silicon steel sheet insulation damage,etc.Motor vibration generated when the noise and the additional load,may be bad driving device,can also be caused by the motor itself,such as the rotor dynamic balance is not good,shaft bending,installation does not reach the designated position,loose fasteners and so on.Motor open phase running the cause of the main line fuse is melt fuse or current setting values are not appropriate,touch switch contacts caused by the bad.If you run a long time,will burn out motor.Three-phase voltage imbalance or winding electric vehicle motor interturn short circuit will cause unbalanced three phase current,the stator winding end reverse connection will cause the motor temperature rise,winding grounding or short circuit can cause too much electricity,iron core silicon steel sheet insulation damage will cause motor overheating,etc.

In a word,in actual operation,to analyze the cause of the problem correctly,strengthen the patrol and maintenance,timely discover and eliminate the malfunction of the motor,as much as possible to ensure safe operation of motor Motor maintenance of motor start,first check the motor assembly is flexible,winding insulation resistance is in line with the requirements,the rotating part for jam,also check the motor start and protection equipment eligibility requirements,such as motor grounding device is in good condition,the selected low voltage circuit breaker,contactor,fuse configuration is correct,and so on.Motor start,start times cannot too much,otherwise the motor could overheat burn out.In the operation of the motor,to closely monitor the voltage,current and temperature,the motor operating electricalmotor1.blogspot.com voltage should be strictly controlled within the scope of the change,otherwise may cause motor overheating,also,the current is not too high or too low,because when the voltage must be,running current drag,it reflects the motor load,mechanical load,motor overload operation for a long time,the current will rise,make serious motor overheating,if the motor load is light,the formation of "big horse car",the motor capacity is not able to make full use of.In daily maintenance,also should closely monitor any abnormal noise or vibration motor,check whether the screw is fall off or loose,the motor repair and maintenance regularly,keep clear of the external dust,oil change on a regular basis.

The selection of the motor selection of motor,first of all to understand the mechanical load characteristics of the motor,according to the types and features of the mechanical load to select the rated capacity,rated speed and rated voltage of the motor and the pattern.For a production machine equipped with an electric motor,the first thing to reasonably choose the power of the motor.Usually according to the need of the production of mechanical load to select the power of the motor,at the same time,consider the work of load problem,that is to say,should be adapted to the selected motor mechanical load of the continuous nature of work,short-term or intermittent cycle.When the power to choose not too big,also not too small.Choose the small,can't guarantee the normal work of the motor and production machinery; Choose the big,motor fan although can guarantee the normal operation,but not the economy,motor capacity can not be make full use of,and motor often cannot full load operation,make the efficiency and power factor is not high.Secondly,according to the request of power supply voltage conditions,chooses Y series three-phase asynchronous motor rated voltage and frequency with the power supply voltage and frequency.The speed of the motor must be selected according to the requirement of the production machinery nameplate,otherwise may change in the production of mechanical performance.In addition,the structure,protection,cooling of the motor and installation form,should adapt to the requirement of using the environment conditions,and to strive for installation,debugging,maintenance is convenient,safe and reliable to ensure the motor can run.

Energy conservation to reduce running cost for a long time

Motor is an important industrial energy consumption equipment,widely used in areas such as fan,compressor,pump,mechanical transmission,its power consumption is more than about 60% of China's entire industrial power consumption,220v ac electric motor ssmall three-phase asynchronous motor power consumption accounts for about 35%,is a major drain,so the development of China's high efficiency motor is one of the important measures to improve energy efficiency,meet the needs of the development of our country,it is very necessary.Motor system energy saving project has been listed as China's 11th five-year plan is one of the ten major energy conservation projects,is the key areas of the country's energy conservation and emissions reduction work. magnet prices In the context of energy conservation and emissions reduction,mandatory standards and encourage policy determines the high efficiency and energy saving motor will fully replace the traditional inefficient,high efficiency and energy www.dongfeng-motor.com saving motor is a new motor design,new technology and new materials,by reducing the wastage of the electromagnetic energy,heat energy and mechanical energy,improve the efficiency of the output of the motor of the motor.

Compared with standard motor,motor with high efficiency and energy saving and energy saving effect is very obvious,under normal circumstances,the average energy consumption fell by around 10%,efficiency can be increased by about 4%. Expert analysis,in the whole life cycle of the motor,the purchasing price accounted for 2% of the total cost of the Motor vehicle motor maintenance costs accounted for 0.7% of its total cost,and the cost of energy consumption accounted for 97.3%. Therefore,considering from the whole life cycle of the motor,that is,from the design,manufacture of the motor to motor selection,operation,adjustment,repair,scrap,high efficiency and energy saving motor save energy consumption for the factory,reduce the life cycle cost and improve production efficiency and reduce environmental pollution,but also reduce energy consumption and reduce the emissions of carbon dioxide,conducive to the sustainable development of the factory. In short,the effect of energy saving for sustainable throughout the entire life cycle of mechanical equipment.