200kva generator. what will be tha maximum load. what are some factors to be consider.?

Answer 1

As a 200kVA generator I would assume that it is three phase. As the previous post stated to find the current you need to know the operating voltage. Assume that you are not American so will work on the basis of 400 or 415V three phase.

Maximum available current can be calculated by multiplying the kVA factor by 1.39 for 415 volt or 1.44 for 400 volt.

Therefore the output current will be 278 Amps for 415 volt or 288 amps for 400 volt. These are currents per phase so in single phase terms you will have access to three times this value: (834 amps for 415 volts or 864 for 400 volts)

The actual usable power is determined by multiplying the generator by the units output power factor. For most diesel generator sets, this is usually 0.8, giving you 160 kW of usable power.

Knowing the power factor of your load will help you to determine the sizing of your generator. If the load power factor is greater than 0.8 then you will need to determine your capacity based on the kilowatt capability of the generator. If the load power factor is less than 0.8 then the capacity will need to be determined based on the current capability of the generator instead. This will always give you the worst case scenario.

Something else to bear in mind is the ability of the generator to accept a load step. 60% step load is usually the most that a set can accept. Some are capable of taking 100% immediately, but generally this will just cause them to stall out and stop.

If you are running the set for prime power then you can gradually increase your load until you reach maximum. If you are running as a standby unit then you either need to size you set based on a load step of 60% or add load shedding circuits into your power distribution system to allow the generator to warm up.

Don't forget that a generator should be run with a reasonable load usually greater than 50% or the efficiency of the set will suffer and the unit will gradually coke up (assuming here that you are talking about a diesel generator set.

Answer 2

Operating Voltage would be help full. If you have 240 volts split phase, or 230 single phase, about 833 Amps full load. If it is a three phase, less current.
277/480 three phase 277 amps

Does this help you with your answer. If we have a linear power supply we have to add 1/3 more to the load.
The watt factor is. 155,600 Watts