Report Differences Between ANSI and IEC
The Equipment Duty Scenario Comparison Report includes slightly different information depending on whether your short circuit calculation method in system options is set to ANSI or IEC. See Short Circuit Options for more information about setting the calculation method.
ANSI
The ANSI version of the report displays a Vpu column (voltage per-unit). Momentary cycles are reflected in the 1/2 cycle columns. For high-voltage breakers, interrupting cycles are displayed in the Int (interrupting) columns. Interrupting cycles are measured as a number of cycles.
Figure 1: Equipment Duty Scenario Comparison Report - ANSI Version
IEC
The IEC version of the report displays a C Factor column (voltage correction factor). Momentary cycles are reflected in the Initial columns. For high-voltage breakers, interrupting cycles are displayed in the Breaking columns. Breaking times are measured in seconds.
Figure 2: Equipment Duty Scenario Comparison Report - IEC Version
See System Options for more information.
