Connected load is defined as the sum of rating of all equipment that is connected to a power station. Connected load considers all the equipment despite its condition running or not [either switched on or off].

The connected load can be mathematically calculated by simply adding all the ratings of equipment.

Connected load = Sum of rating of all connected equipment

Example 1: A domestic consumer has 3 lamps each having 30 watts rating, 2 fans of 70 watts and a water heater of 1000 kW. Calculate the connected load.

Solution: [3 * 30 watts] + [ 2 * 70 watts] + [ 1 * 1 kW]

= 90 watts + 140 watts + 1000 watts

= 1230 watts

Also, learn:

Example 2: A commercial consumer has 4 refrigerators of 2 kW each. 8 fans of 60 watts each, an 20 lamps each having 50 watts rating. Find the connected load.

Solution: [4 * 2 kW] + [ 8 * 60 watts] + [ 20 * 50 watts ]

= 8 kW + 480 watts + 100 watts

= 8 kW + 0.480 kW + 0.1 kW

= 8.58 kW

Such problems are very simple and simple simple addition with multiplication. However you should be extremely careful with the prefix conversions.

Example 3: The municipal administration of a certain area installed 200 street lights each rated at 100 watts and a water supply system having 20 motors each rated at 2 kW.

Solution: [ 200 * 100 watts] + [20 * 2000 watts]

= [2 kW] + [40 kW]

= 42 kW