Schweitzer Engineering Laboratories SEL-300G - Page 40

vi Relay Element Settings
Date Code 20020206 SEL-300G Instruction Manual
Figure 2.44: Single Blinder Scheme Operating Characteristics..............................................................2-22
Figure 2.45: Single Blinder Scheme Logic Diagram ..............................................................................2-24
Figure 2.46: Single Blinder Typical Settings ..........................................................................................2-27
Figure 2.47: Double Blinder Scheme Operating Characteristics ............................................................2-28
Figure 2.48: Double Blinder Scheme Logic Diagram.............................................................................2-30
Figure 2.49: Double Blinder Typical Settings.........................................................................................2-34
Figure 2.50: Frequency Element Voltage Supervision Logic .................................................................2-37
Figure 2.51: Frequency Element Logic ...................................................................................................2-38
Figure 2.52: Example Turbine Operating Limitations During Abnormal Frequency.............................2-42
Figure 2.53: Abnormal Frequency Protection Logic Diagram................................................................2-43
Figure 2.54: Winding RTD Trip Characteristics with BLMT = 2.00 .....................................................2-48
Figure 2.55: Pole Open Logic Diagram...................................................................................................2-51