Sir: Frequent electricity fluctuations damage electronic equipment. The volume of pressure in the compressor of an air conditioner or a freezer is 300 pounds per square inch. It takes three minutes for this pressure to stabilise when the compressor is shut down. If the compressor is restarted while the pressure is still high without giving it enough time to stabilise, the compressor’s motor is overloaded and could even burn out. I had an impression that PEPCO would have known at least this simple arithmetic. KHURSHID ANWER Lahore