1.
Description
1.1
General Overview ............................................................................................... 1-2
1.2
Protection Subsystem Functions ........................................................................ 1-3
1.2.1
Non-Directional Overcurrent Protection 3-Phase and Ground ........................... 1-3
1.2.2
Recloser (7IRD-A/J Models) ............................................................................... 1-3
1.2.3
Breaker Failure Protection .................................................................................. 1-3
1.2.4
Open Phase Protection ....................................................................................... 1-3
1.2.5
Residual Current Detection (Neutral Unbalance Unit) ........................................ 1-3
1.3
Control Subsystem Functions ............................................................................. 1-4
1.3.1
Local Control and Status Indication of all Bay Elements .................................... 1-4
1.3.2
Local Recloser Control (7IRD-A/J Models) ......................................................... 1-4
1.3.3
Measurement Presentation ................................................................................. 1-4
1.3.4
Presentation of Local Alarms as Conventional Alarms ....................................... 1-4
1.3.5
Indication of Digital Inputs / Outputs ................................................................... 1-4
1.3.6
Indication of Auxiliary Inputs / Outputs States and Protection LEDs .................. 1-4
1.4
Additional Functions ............................................................................................ 1-5
1.5
Model Selection ................................................................................................... 1-7
