hager h3+ - Function of the Energy Trip Unit

256LE005550A
Function of the Energy trip unit
Page
3.1 Energy trip unit navigation and settings 26
3.1.1 Protection menu 26
3.1.2 Measurements menu 27
3.1.3 Configuration menu 28
3.1.4 Information menu 29
3.1.5 Live mode 29
3.1.6 Navigation principles 30
3.1.7 Lock/unlock button 30
3.2 Protection function 31
3. 2.1 Long time delay protection 32
3.2.2 Short time delay protection 34
3.2.3 Instantaneous protection 36
3.2.4 Ground protection 37
3.2.5 Neutral protection 38
3.2.6 Selectivity per zone function (ZSI) 39
3.3 Measurement function 41
3.3.1 Overview of measurements 41
3.3.2 Measurements in real-time 42
3.3.3 Min/max measurements 44
3.3.4 Measuring unbalances 46
3.3.5 Power measurements 47
3.3.6 Energy measurements 49
3.3.7 Measuring values averaged over an interval 49
3.3.8 Measuring total harmonic distortion (THD) 52
3.3.9 Measuring power factors 53
3.3.10 Configuring measurements 55
3.3.11 Accuracy of measurements 58
3.4 Managing alarms and logs 60
3.4.1 Principle of Energy trip unit alarms 60
3.4.2 PTA overload pre-alarm 61
3.4.3 Trip alarms 62
3.4.4 Customisable alarms 63
3.4.5 System alarms 66
3.4.6 Configuring alarms 67
3.4.7 Alarm log 70