DBJ08-20-98 household electric equipment should meet the following standard

full load 75% load 50%load three phase induction electric motor Y series B35
Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years
9, 3 phase induction motor residential telephone communication pipeline must be to the home, diesel generator household telephone into line should not be less than two on. Small set of telephone socket should not be www.facebook.com/guohong.trading less than two, medium, large sets of telephone socket should electric water pump be not less than three. With the popularity of home computers, each pair of 3 phase induction motor lines already cannot auto spare parts satisfy the need, therefore every phone into line should not be less than two right, one of the corresponding to the computer table, to meet the needs of the Internet. 10, power, phone, TV circuit should be ac synchronous generator dark apply flame retardant plastic tubing. Such as telephone and television elv lines and steel tube can be applied to protect, the power cord with flame retardant plastic pipe protection. 11, electrical circuit should be adopted to meet the requirements of security and fire prevention wiring installation way. Wire copper wires should be adopted. Family pack in AC motor the horizontal lines were converted to wear magnetic generator dark apply, both meet safety and meet the requirements of fire prevention.

The choice of buttons, low voltage switch

 ac electric motor stator copper winding 
Specifications
1. Material: silicon steel  
2. 20 years manufacturing experience 
3. competitive price,high quality 
4. Limit switch (switch) : limit switch is 3 phase induction motor in accordance with the production of mechanical motion stroke position and action of small current switch. Its choice is mainly according to the requirement of the mechanical position of switch type, the contact number, voltage type, the model is determined by the voltage electric current rating requirements. Machine tool commonly used have LX2, LX19, JLXK1 and LXW11, JLXK - 11 l micro switch, etc. For fast, high sensitivity, schedule control, the rotor proximity switch can be used. Proximity switch is also known as anon-contact limit switch. It is caused by the moving parts of electromagnetic field change and action. Proximity switch long life and good reliability, generator accuracy and price limit switch. 5, automatic air switch, automatic switch is spare parts also called the automatic air circuit breaker. Automatic switch on the machine is widely applied. This is because the automatic switch can connect or breaking normal working current, can automatically breaking through cutting or short-circuit current, breaking capacity is big, has under voltage diesel generator set and overload short circuit protection. 


Electric Motors 1 HP 3PH
Specifications
1. Shape: squirrel cage
2. CE.ISO CCC 
3. Side Terminal Box 
4. Free Foot Mounting 

5. 100% copper wire 
Select wholesalemotor.blogspot.com automatic switch should be considered the main parameters: rated voltage, rated current and the limit of the allowed to cut off the current, rotor etc. Automatic switch trip rated current should be equal to or greater than the load allows the long-term average of current; The limits of automatic switch breaking ability than, at least equal to the maximum short-circuit current circuit; Automatic switch trip current setting should be according to the following principles: under voltage trip rated voltage should be equal to the rated voltage of main circuit; Thermal trip setting current and load) is equal to the rated current alternator generator of the object; Electromagnetic trip of the instantaneous electric generator tripping current setting should be greater than the load peak current in normal working conditions; generator Protect motor, electromagnetic trip decide the instantaneous tripping current of motor starting current of 1.7 times. Machine tool commonly used automatic air switch such as DZ series, the series of DW.

DBJ08-20-98 household electric equipment should meet the following standard

3, as people living standard rise, electric rice fort, microwave oven, air conditioner, electric kettle, electric spot squirrel cage induction motor chung person households, household electricity load is growing rapidly, 1 kw of power load is not enough, so DBJ08-20-94 household electricity load design power of 4 kw, watt-hour meter to choose 5 (20) A. Price increase of residents' income and household electrical appliances, make electric motor parts a home acmotor2.blogspot.com two air conditioners, color TV sets and squirrel cage induction motor computers in the home is not new, has prompted a surge in household electricity load again, therefore DBJ08-20-98 household small diesel engine electricity load design power increased generator to 4-8 kw by 4 kw. The Induction motor high standards had permanent magnet generator been designed by 6 kw, high standards of commercial electric generator housing and more than 130 m2 residence designed by 8 kw, watt-hour meter ac motors are all made of 10 (40) A single-phase watt-hour meter.

Positive pressure type motor

gost motor 7.5kw
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
 It's a type of positive pressure type electrical equipment. The electric motor 12v 500w structure features are: (1) have a full configuration of ventilation system, the motor internal may affect the structure of the ventilation blind Angle. (2) shell and tube made of noncombustible wholesalemotor.blogspot.com materials, and has enough mechanical strength. (3) within the shell and the main relative to the outside world keep enough positive pressure air. (4) the motor must have a safety device (e.g., time relay and flow monitor), to ensure adequate ventilation, also must have the shell pressure under voltage automatic protection and alarm device. (5) ac motor quick open the door or cover shall be on shell with power interlock device. In China there is no unified positive pressure type electric motor motor series products.

Switch the characteristics of the present and future - SPC exchange and technology trends

 Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors
2.IEC standard
3.OEM
4.Voltage:50HZ &60HZ;380V&415V
5.Protection class: IP54
 SPC digital exchange is the modern digital communication technology, computer technology single phase ac motor and large scale integrated circuit (LSI) products of organic combination. Advanced hardware and perfect the software integrated into an organic whole, give the SPC exchange with many functions and features, to make it compared with the mechanical and electrical switches, has the following advantages: 1. Small volume, light weight, low power consumption, it is only about 1/8 of the crossbar switch volume - 1/4, greatly compress the room occupancy area, save the cost. 2. The flexibility to provide customers with numerous new business services. Because of using the SPC technology, thus it can be convenient by the software increase or modify the switch function, to provide customers with new services, such as abbreviated dialing, call waiting, call transfer, call forwarding, busy callback, the single phase induction motor hotline, conference calls, has brought great convenience to users. 3. Stable and reliable work, convenient maintenance, due to the large scale integrated circuit (LSI) commonly used SPC exchange circuit or application-specific integrated circuit (ASIC), and therefore has a high reliability.

 generator Stator Rotor 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 
3. Accessories Series: stator and rotor 
It usually USES the redundancy technology or automatic fault diagnosis measures, to further improve the reliability of the system. In addition, the SPC exchange with the help of a fault diagnosis program for automatic fault detection and location, and to discover and troubleshooting, thereby significantly reducing the workload of maintenance. System can easily provide automatic billing, traffic, service quality automatic monitoring, overload control and brought convenient to maintenance and management work. 4. Easy to use the new total signal way (CCS, Common Channel Signalling). Because of SPC Digital switches and Digital transmission equipment can be directly to Digital connection, providing motor electric high-speed public channel signal, is suitable for the use of advanced way of CCITT no. 7 signalling, so as to make the signal transmission speed, large capacity, high efficiency, and can adapt to the future new business and the characteristics of the Network control, in order to achieve the comprehensive Network (ISDN, Integrated Services Digital Network) to create the necessary conditions. 5. Easy and digital terminal, digital transmission system, digital terminals, transmission and exchange of integrated and unified. Can expand communication capacity, improve quality, reduce investment, communication system and for the development of integrated digital network (idns) and integrated services digital network (ISDN) lay the foundation.

The role of current transformer, current transformer

 AC Electric motor Plastic fan parts 
Specifications
1. Customised
2. good quality
3. 20 years manufacturing experience
4. Delivery Detail: 20-35 days after receiving payment
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. 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. 


Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
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.

Four capillary connected to the main valve and control valve of the four-way reversing valve principle is introduced

 The main valve and control valve four capillary connection four-way reversing valve, and the three root capillary connection compared the four-way reversing valve, electric motor 12v 500w control valve below three capillary connection in the same way, but on the control valve to increase the capillary connection to the main valve of high-pressure air inlet pipe 4, a high voltage channel. The four-way reversing valve control valve and main valve on the structure and movement theory, namely: the control valve is itself a four-way change valve. 

When the system generator set spare parts is in a state of refrigeration, the electromagnetic coil is not electricity, release valve, valve core due to spring force moved to the left, capillary E and C, B and D, the main valve nozzle within 4 high pressure through capillary B and D into the right space inside the main valve, main valve in the space of the left by capillary C and E to the low pressure ac motor air gate 2, the main valve internal pressure is right wholesalemotor.blogspot.com high left low, piston driven slider move to the left side, nozzle with the 1 in 2 and 4 with 3 connected; When the system is in a state of heating, electromagnetic coil current and the effect of electromagnetic force control valve valve core to move to the right end, capillary E connected with D, B and C, the main valve in the left side become high pressure and right side into a low pressure, the valve core is to the right side, the connecting tube 2 and 3, 4 and 1.

The working principle of four-way reversing valve

When electric motor price the electromagnetic valve is not electricity,work on the refrigeration system and the role of control valves for spring 1,valve core moves to the left side,is in a state of release,capillary E and C connected at this time. www.facebook.com/guohong.trading Because E on the low pressure suction tube,capillary C and main valve inside the left space for the low pressure,high pressure gas nozzle enters the main valve by the main valve,the main valve piston I vent in the right end of the space to become a high pressure,promote the main valve valve core is moved to the left,nozzle and nozzle 1 2 connecting the nozzle with the nozzle 3 in 4 and status form the refrigeration cycle system When the solenoid valve electricity,electromagnetic force pull-up control valve valve core to the right,capillary E connected to D. ac motor The main valve in the right space become low voltage,high pressure gas is entered into the main valve piston lamination II vent in the left space,promote the valve core to move to the right end,nozzle and nozzle 3 2 connecting the nozzle with the nozzle 1 in 4 and the function of the evaporator,condenser,exchange,system is transformed into heating circulation state.

Ac voltage measurement

In order to grasp the change situation of IC ac signal,can be used with the dB jack multimeter ac electric motor 12v 500w voltage electrical motor 24v to approximate measure of IC.Detection multimeter under ac voltage blocking,pens and insert the dB jack;For no dB jack multimeter,need in pens and concatenated a 0.1 ~ 0.5 u F condenser.The method is suitable for the working frequency is low IC,such as television video amplifier stage,field scanning circuit,etc.Due to acmotortrading.blogspot.com the inherent frequency of the circuit,waveform is different,so the measured data is an approximation,for reference only.

power factor compensation

An overview,In ac circuits,the phase difference between voltage and current cosine is called power

factor,with symbol cos said on numerical value,the power factor is the ratio of active power and

apparent power,namely the cosine = P/S.Power load of power grid,such as motor,transformer,fluorescent

lamp and the electric arc furnace and so on,mostly belong to the inductive load,the motor inductive equipment in operation process is not only need to absorb the active power in power system,also absorb reactive power at the same time.So the parallel capacitor reactive power compensation equipment installed in the power grid,will be able to provide compensation reactive power consumed by a perceptual load,reduce the power grid power supply side perceptual load and by line transmission of reactive power.Reduce the reactive power flow in the grid,can reduce the transmission and distribution lines transformer and bus power loss caused by the transmission of reactive power,this measure is called power factor compensation.Owing to the rise in the power factor is the root cause of the reactive power reduce,so often called power factor compensation of reactive power compensation.In a large system,reactive power compensation is also used to adjust the voltage of power grid,improve the stability of power grid.In a small system,through proper reactive power compensation method also can adjust the unbalanced three-phase current.According to the wangs theorem:in phase to phase and jumper inductor or capacitor can be transfer active current.For three-phase current unbalance of system,therefore,as long as appropriate in each phase to phase and phase zero access between different capacity of capacitors,acmotortrading.blogspot.com not only can be in each phase of power factor compensation to 1,and can make the active current of each phase equilibrium state.Second,the method System of compensation for reactive power compensation's main purpose is to improve the power factor.

Because of the power supply bureau of electricity is KVA or MVA to calculate,but the fee is to KW,which is actually doing useful work rate,a reactive power between the difference,in general is the reactive power in KVAR.Most lost work are inductive,that is generally called motor,transformer,fluorescent lamp.almost all of the lost work are inductive,capacitive is very rare.That is because of the existence of the inductive,caused a KVAR value in the system,is a trigonometric function relationship between the three KVA square = KW square+KVAR square Simple speaking,in the above formula,if today's KVAR value is zero,KVA will be equal to KW,the power supply bureau of 1 KVA electricity is equal to the user 1 KW consumption,the most cost-effective,so the power factor is a factor of power supply bureau is very care about.The power factor of the user if there is no ideal,relatively is the resource consumption in power supply bureau,so that is why the power factor is a regulatory restrictions.At present in terms of domestic power factor regulation must be between 0.9~1 inductive,below 0.9 need to accept the punishment.This is why we have to control the power factor in a very sophisticated.Some of the power electronic equipment such as rectifier,inverter,switching power supply,etc.; Saturable equipment such as transformers,motors,generators,etc.; Electric equipment and three phase induction motor price electric light source equipment such as electric arc furnace,fluorescent lamp,etc.,these devices are the main source of harmonic,the runtime will produce large amounts of harmonic.Harmonic on the engine,transformers,motors,capacitor etc all electrical equipment connected to the grid size,main show is harmonic generation additional loss,make the insulation of the equipment overload overheat and harmonic overvoltage accelerated aging,etc.Parallel to the line on the reactive power compensation capacitor to the harmonic amplification effect,causing the system voltage and current distortion is more serious.In addition,the harmonic current superimposed on the fundamental wave current of capacitor,can make the capacitor current of effective value increase,leading to higher temperature,reduce the service life of the capacitor.Harmonic current increase the copper loss of transformer,cause local overheating,vibration and noise increases,additional heating winding and so ac alternators 220v on.Harmonic pollution can increase cable transmission line loss.And harmonic pollution affect communication quality.When the current harmonic component is higher,may cause relay protection of overvoltage protection,overcurrent protection misoperation.Therefore,if the system is of high harmonic content,in addition to the series capacitor side need appropriate tuning (detuned) reactance,and installation of harmonic improve device for load characteristic project discussion.

The fan blade

In the context of the fan www.dongfeng-motor.com blade or blades,electric tools

series motor rotor fan blade have to use fan leaf (iron,plastic) and single-phase,three-phase

asynchronous motor with fan leaf (now mostly plastic).Single and three-phase asynchronous motor,the make and model of the fan blade by the motor model,the number printed on the surface of the fan blade.As fan blade,Y Y-90-2-90-4,6,8 fan leaves,usually 2 is a series,4,6,8 is a series (gm).As emergency substitute,because the number of at the same time,not 2 can be very use tip of the leaf of fan use scissors to stator substitute,otherwise can't cover the upper hand.Remove the fan blade method series motor,generally with a long flat iron pry the class object (e.g.,flat file).After years of use,fan leaf aging is disassembled extremely fragile,be careful operation.Series motor high efficiency electric motor rotor fan www.facebook.com/guohong.trading blade available special Lamar spin out,also can use internal combustion engine valve down.