ITI Curve
A standard for the voltage required for electronic devices to operate stably.
Most electronic equipment can withstand a transient voltage of 5 times the rated voltage for 20 usec.
If the equipment is 220V
220V * 1.414 * 5 = 1,555Vpeak
The ITIC curve is a graph that shows the voltage fluctuation range that Information Technology Equipment (ITE) can withstand. This curve was originally known as the CBEMA curve and was first developed by the Computer & Business Equipment Manufacturers Association (CBEMA).
The ITIC curve shows how ITE responds to various voltage conditions such as voltage sags, voltage swells, surges, interruptions, and steady state voltage variations. This curve is mainly applicable to 120 V, 120/208 V, and 120/240 V 60 Hz systems .