100 kw is the power drawn by the load. to calculate the cable size you need to know the voltage. From that you can calculate the current. this decides the cable size. for example if the voltage is 400Volts then the current flowing in the circuit when the load is 100 KW will be 250 amps. (100,000/400). for 250 amps to flow with out causing excessive heating of the cable the cross sectional area of the copper cable should be 150 sq mm.for a round cross section the diameter will be roughly 15mm.
Need to know what the voltage of the motor is.
you need the current of motor or the KW/HP rating
It is not possible to answer the question without knowing the supply voltage. Conductors (wires) are sized according to current (amps), not KW. Amps = watts / volts As you can see, there is no way to determine amps (needed to size the wire), without knowing both the KW and the voltage. If this is on a test, it is a trick question. If you are really trying to size a cable for a real stove, hire a licensed electrician! Improperly sized wire can start a fire.
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 I could. How?
To answer this question the voltage of the motor must be stated.
100 kw is the power drawn by the load. to calculate the cable size you need to know the voltage. From that you can calculate the current. this decides the cable size. for example if the voltage is 400Volts then the current flowing in the circuit when the load is 100 KW will be 250 amps. (100,000/400). for 250 amps to flow with out causing excessive heating of the cable the cross sectional area of the copper cable should be 150 sq mm.for a round cross section the diameter will be roughly 15mm.
Need to know what the voltage of the motor is.
you need the current of motor or the KW/HP rating
It depends on the voltage, which was not specified. Please restate the question, giving the voltage. The reason for this is that cable size is a function of current, not power.AnswerThe size of a cable depends on the material from which the conductor is made, the number of cores, the type of insulation, whether it is armoured or unarmoured, and how it is installed. So, even if you know the relevant voltage, the only way in which you can determine the correct cable size is the use the tables provided in your country's wiring regulations, which take these factors into account. Incidentally, the symbol for 'kilowatt' is kW, not 'kw'.
It is not possible to answer the question without knowing the supply voltage. Conductors (wires) are sized according to current (amps), not KW. Amps = watts / volts As you can see, there is no way to determine amps (needed to size the wire), without knowing both the KW and the voltage. If this is on a test, it is a trick question. If you are really trying to size a cable for a real stove, hire a licensed electrician! Improperly sized wire can start a fire.
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.
Cable doesn't conduct power, it conducts current. Either the voltage and load must be known or the amperage the cable will need to conduct to determine the size of the cable. Once the amperage is known, there are multiple tables online that have cable size and amperage. Do a Google search for "conductor amperage" for examples.
3 core 35 sq mm alu. Or 3 core 25 sq mm cup.
The cable that is used to connect from the generator is based on the size in kW's of the generator and the generator's breaker size rated in amps. It usually is a flexible cab-tire 4 wire cable if the generator is a portable type. If it is a stationary generator is has to be wired with a flexible conduit so as not to transmit vibration from the generator to the conduit system.
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.