75 HP = 55 KW
55 = 31/2 x 0.220 x I x cos φ = 31/2 x 0.220 x 0.8 x I
I = 55/(31/2 x 0.220 x 0.8) = 180,42 A
3 x 70 mm2 is the size of cable for 75 HP 220 Volts 3 phase motor
First of all find out what voltage the motor is designed to work on.
you need the current of motor or the KW/HP rating
The cable size depends on a few factors, such as the supply voltage, the method of starting the motor, (direct-on-line, or star delta) and the length of cable required to compensate for voltage drop. Also, if the cable is copper or aluminum.110 kW motor has a rated current of 200 amps at 415 volts, so the correct copper cable size would have a cross-sectional area of 75 square mm., if the motor is started direct-on-line.At 660 volts, the rated current would be 118 volts and the cable size would be 35 square mm.
Yes, most large motors are three phase. Usually single phase motors only go up to 10 HP. Larger than this and the wire size and contactors used to control the motors becomes extreme. For example a single phase 10 HP motor on 115 volts draws 100 amps. The same single phase motor on 230 volts draws 50 amps. The same 10 HP motor on three phase system draws the following amperage; 230 volts is a 28 amp draw, 460 volts is a 14 amp draw and 575 volts is a 11 amp draw. As you can see the higher the voltage becomes, the smaller the wire feeder size is needed and much smaller size contactor can be used to control the motor.
Assuming it is a 400 V three-phase motor, the phase current is 11 amps, or more if the power factor is less than 1.0 (or the supply voltage is different). If it is a 400 V motor the cable should be capable of carrying 16 amps, so a 2.5 mm-sq 4-core cable is needed.
Sir, what is the cable size for 1.5kw 3phase induction motor 400v?
First of all find out what voltage the motor is designed to work on.
you need the current of motor or the KW/HP rating
The cable size depends on a few factors, such as the supply voltage, the method of starting the motor, (direct-on-line, or star delta) and the length of cable required to compensate for voltage drop. Also, if the cable is copper or aluminum.110 kW motor has a rated current of 200 amps at 415 volts, so the correct copper cable size would have a cross-sectional area of 75 square mm., if the motor is started direct-on-line.At 660 volts, the rated current would be 118 volts and the cable size would be 35 square mm.
Yes, most large motors are three phase. Usually single phase motors only go up to 10 HP. Larger than this and the wire size and contactors used to control the motors becomes extreme. For example a single phase 10 HP motor on 115 volts draws 100 amps. The same single phase motor on 230 volts draws 50 amps. The same 10 HP motor on three phase system draws the following amperage; 230 volts is a 28 amp draw, 460 volts is a 14 amp draw and 575 volts is a 11 amp draw. As you can see the higher the voltage becomes, the smaller the wire feeder size is needed and much smaller size contactor can be used to control the motor.
Assuming it is a 400 V three-phase motor, the phase current is 11 amps, or more if the power factor is less than 1.0 (or the supply voltage is different). If it is a 400 V motor the cable should be capable of carrying 16 amps, so a 2.5 mm-sq 4-core cable is needed.
If it's a 380 v 3-phase supply, the current is up to 300 amps which could be supplied over a short distance by XLPE cable with 70 sq. mm cross-section conductors.
i have 200 hp motor what i need cable size in 100 feet distance
A 20 HP three-phase motor operating at 230 volts will draw approximately 45 amps. You would typically use a wire size of at least AWG 8 for this application. However, it's recommended to consult the National Electrical Code (NEC) and a qualified electrician to ensure compliance with local regulations and safe installation practices.
3 core 35 sq mm alu. Or 3 core 25 sq mm cup.
I would go with 20 amp 3 pole 15 amp will also do
A 1HP 3-phase motor typically operates at 208-230 volts and has a current rating of around 3-4 amps. It runs at a speed of 3450 RPM and has a frame size of 56. The motor is designed for industrial applications requiring higher power output and efficiency.