• Voltage Collapse Mitigation providing 4-step undervoltage and 4-step

underfrequency load shedding functions

• Undervoltage blocking and negative sequence overvoltage blocking for

system faults provides load shedding security

• Local and remote serial communications (MODBUS Protocol) for

monitoring and control functions

• 5 programmable outputs and 2 programmable inputs Protective Functions

• 4-Step Phase undervoltage (27) protection, single-phase and positive sequence

• 4-Step Phase undervoltage, selectable as single phase or positive sequence

responding, with Negative sequence overvoltage and three phase undervoltage

supervision

• Phase overvoltage (59) protection

• Four-step over/under frequency (81) protection

• Rate of Change of Frequency (81R) protection

• IPSlogic™ takes the contact INPUT status and function status and generates

OUTPUTS by employing (OR, AND, and NOT) boolean Logic and a timer.