NEMA Standard Premium Efficiency Three Phase Induction Electric Motor

NEMA Standard Premium Efficiency Three Phase Induction Motor Installation Dimension:

NEMA Standard Three Phase Induction Electric Motor Model Description:

For example,

28 4 T: “28” means that its value is equal to 4 times the height of the center of the base (in),”4″ means the length code of the axial foot hole of the base, and “T” means the base mark with a standard size.

NEMA Standard Three Phase Induction Electric Motor Applications:

Blower Station	Crane Machine
Industrial Fan	Water Pump Station

Starting of Three Phase Induction Motor

1. Inspection Before Starting the Three Phase Induction Motor

• The insulation resistance should be checked before starting the newly installed or deactivated electric motor for more than three months, and the measured insulation resistance value is not less than 1MQ.
• Check whether the fastening screws of the motor are tightened, whether the bearings are short of oil, whether the wiring of the motor meets the requirements, and whether the casing is reliably grounded or connected to zero.
• Check whether the screws and pins of the coupling are fastened, whether the belt connection is good, whether the tightness is appropriate, whether the unit rotates flexibly, whether there is jamming, movement, abnormal sound, etc.
• Check whether the rated current of the fuse meets the requirements and whether the installation is firm and reliable.
• Check whether the wiring of the starting equipment is correct, whether the starting device is flexible, whether the contacts are in good contact, and whether the metal shell of the starting equipment is reliably grounded or connected to zero.
• Check whether the three-phase power supply voltage is normal, whether the voltage is too high or too low, or whether the three-phase voltage is asymmetrical.
• Any problems mentioned above must be completely solved, and the machine can be started only after confirming that the preparations are correct.

2. Precautions when Starting the Three Phase Induction Motor

• The electric motor is allowed to start at a full voltage or start at a reduced voltage (with reactance or Y-△), but it should be noted that it is about 5-7 times the rated current when starting at full voltage, and the torque is proportional to the square of the voltage when starting at a reduced voltage when the power grid capacity is insufficient, it is advisable to use the step-down starting, and when the static load is quite large, the full-voltage starting can be used.
• When the phase sequence A, B, and C of the power supply are connected to the terminals Ul, V1, and w of the terminal board respectively. Correspondingly, the rotation of the electric motor is regarded as clockwise from the main shaft end.

• The electric motor should generally have thermal protection device, and the setting value of the protection device should be adjusted according to the rated current of the motor.
• After closing, if the motor does not turn, it should be pulled quickly and decisively to avoid burning the electric motor.
• After the electric motor is started, pay attention to observing the transmission device, the production machinery, and the voltage and current of the line. If there is any abnormal phenomenon, it should be stopped immediately to find out the fault and remove it before re-closing and starting.
• According to the technical requirements of the motor, the number of consecutive starts of the motor is limited, generally, no more than 3 consecutive starts at no load, and the motor runs to a hot state for a long time, and then starts after stopping not more than 2 times.
• When several motors are powered by the same transformer, they cannot be started at the same time and should be started one by one from large to small.

Three Phase Motors Manufacturers

HZPT is a professional manufacturer & supplier of electric motors. We have a professional technical team to provide technical services for custom electric motors. Our main products include the Y2 series three phase asynchronous motor, the YD series pole-changing multi-speed three phase motor, the YVF2 series variable frequency three phase motor, the MS series three phase asynchronous motor with aluminum housing, the YB2 series explosion-proof three phase motor, YC series single phase capacitors start induction motor, YCL series heavy-duty single phase capacitor start induction motor and more than 200 specifications and varieties. At the same time, the company has an excellent and professional R & D team committed to developing and designing all kinds of special motors for gearshift machines; the products are widely used in national key projects and are the supplier of many well-known domestic enterprises.

Our motor has the advantages of low energy consumption, high efficiency, novel appearance, low noise, low vibration, long service life, thoughtful service, strict quality management system (ISO9001:2000 quality system certification, CCC certification, CE certification), and has become a well-known brand in the industry and achieved a higher market share. At the same time, the products are also exported to Europe, South America, and Southeast Asia. We would like to have higher quality products, lower preferential prices, complete thoughtful pre-sale, sale, and after-sale service, cooperate with friends from all walks of life, hand in hand advance together, altogether will create a glorious future.

China Three Phase Motor Factory

FAQ

Q1: Are you a direct manufacturer or trading company?

A: We have our own production line and advanced workshop, we also have our own international sales department. we produce and sell all by ourselves.

Q2: How long can I get the feedback after we sent the inquiry?

A: We will reply to you within 12 hours of the working day.

Q3: What products can you offer?

A: We are a professional manufacturer of all kinds of electric motors.

Q4: What applications does your electric motor relate to?

A: Our electric motors cover a wide range of industries including train & railway, automobile & truck, construction machinery, mining machinery, forklift, agricultural machinery, shipbuilding, petroleum machinery, construction, valve and pumps, electric machine, hardware, power equipment, and so on.

Q5: Can you do customized electric motor products?

A: Yes, we can customize the electric motors according to the customers’ drawings or samples.

Q6: How about the capacity of your company?

A: We have modern types of energy-saving & environmentally-friendly production lines, as well as 4 heat treatment production lines. and our annual production capacity is over 20,000 sets.

Q7: How many employees of your company? what about the technicists?

A: We now have more than 200 employees, including 10 technicians.

Q8: What's the payment term?

A: When we quote for you,we will confirm with you the way of transaction,fob,cif,cnf,etc. For mass production goods, you need to pay 30% deposit before producing and70% balance against copy of documents.the most common way is by t/t. l/c is also acceptable.

Q9: How to deliver the goods to us?

A: Usually we will ship the goods to you by sea because we are in Ningbo, and we are only 35 kilometers away from the Ningbo port, it is very convenient and efficient to ship goods to any other country. Of course, if your goods are very urgent, Ningbo airport and shanghai airport are also very nearby.

Q10: Where are your electric motor products mainly exported to?

A: Our electric motors are mainly exported to more than 30 countries including the United States, Germany, Japan, Spain, Italy, Britain, South Korea, Australia, and Canada.