ComAp MainsPro G99TT - Page 3

MainsPro G99TT 1.0.0 Global Guide
3
4.2 Mechanical sealing 22
4.3 Signalization LEDs 22
4.4 Measurement screens 24
4.5 Alarm messages 27
5 Introduction of Application Guide 29
5.1 Purpose of this manual 29
5.2 MainsPro G99TT typical usage 29
5.3 Typical applications of MainsPro G99TT protection relay 29
6 Important Steps of MainsPro G99TT utilization 30
7 TRIP and Fault Reset 31
7.1 TRIP 31
7.1.1 TRIP event 31
7.1.2 TRIP status 31
7.2 Fault reset 32
8 Protective features 33
8.1 ANSI 59 Overvoltage, ANSI 27 Undervoltage 33
8.2 Floating 10 minutes average overvoltage 34
8.3 ANSI 81H Overfrequency, 81L Underfrequency 34
8.4 ANSI 47 Voltage unbalance and angle asymmetry 36
8.4.1 Voltage unbalance 36
8.4.2 Positive sequence undervoltage, Negative sequence overvoltage 36
8.5 ANSI 78 Vector shift 37
8.5.1 Measuring principle 37
8.6 81R Rate Of Change Of Frequency (ROCOF) 38
8.7 Phase rotation, incorrect phase polarity 39
9 Application tips 40
9.1 Automatic return to mains 40
9.2 Binary switches 40
9.2.1 External trip 41
9.2.2 Fault reset 41
9.2.3 Alternative settings 41
9.2.4 Disable 41
9.2.5 CB Feedback 41
9.3 Counters 41
9.4 Timer 42
9.5 Start trip 42