To determine whether you can use two air conditioners simultaneously with a 3kW power supply, you need to calculate the total power consumption of both AC units and compare it to the available power.
First, let's find the power consumption of each 1.5-ton AC unit. Typically, a 1.5-ton AC consumes around 1.5 kW to 1.7 kW of power.
Total power consumption of two 1.5-ton ACs = 1.5 kW + 1.5 kW = 3 kW
Since the total power consumption of both AC units is 3 kW, it matches the capacity of the power supply (3 kW). However, it's essential to consider other electrical appliances or devices that may also be running simultaneously in your home, as they will consume power too.
If you plan to run only the two 1.5-ton AC units on a 3kW power supply without any other major electrical devices running, it should be possible. But, keep in mind that the power supply must be stable and without voltage fluctuations, as air conditioners can be sensitive to fluctuations and may require more power during startup.
If you have other devices running in addition to the two AC units, you may need to calculate their power consumption as well to ensure that the total power demand does not exceed the capacity of the power supply (3 kW in this case). If the total demand is higher than the supply capacity, it could lead to overloading and tripping of the circuit breaker. In such cases, you may need to consider alternative power sources or manage the usage of electrical appliances more efficiently.