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UMG 512-PRO
4. Structure of the device 20
4.1 Front panel and display 20
4.2 Rear view 21
5. Mounting 22
5.1 Installation location 22
5.2 Mounting orientation 22
5.3 Securing 22
6. Grid systems 24
6.1 Three-phase 3-conductor systems 25
6.2 Three-phase 4-conductor systems 25
6.3 Nominal voltages 26
7. Installation 28
7.1 Connection to a PC 28
7.2 Ground wire connection 29
7.3 Circuit breaker 29
7.4 Supply voltage 29
7.5 Measured voltage 30
7.5.1 Overvoltage 30
7.5.2 Frequency 30
7.6 Current measurement 31
7.6.1 Current direction 32
7.6.2 Summation current measurement 32
7.6.3 Ammeter 32
7.7 Connection variants 33
7.7.1 Main measurement 33
7.7.2 Auxiliary input 35
7.8 Residual current measurement 36
7.8.1 Failure monitoring 36
7.8.2 Example: Isolation of the residual current transformers 37
7.8.3 Temperature measurement 38
7.8.4 Example isolation of the temperature
sensor 38