janitza UMG 509, Operation Manual And Technical Data, Page: 32 / 124

32
UMG 509
Residual current measurement inputs (RCM)
The UMG 509 is suitable for use as a residual current
monitoring device (RCM) as well as for monitoring AC,
pulsing DC, and DC.
The UMG 509 can measure type A residual currents in
accordance with IEC/TR 60755 (2008-01) .
The connection of suitable external residual current
transformers with a rated current of 30 mA is performed
via the residual current transformer inputs I5 (terminals
4/5) and I6 (terminals 6/7).
C
Residual current transformer ratio
The GridVis software included in the scope
of the delivery can be used to individually
program the residual current transformer
inputs' transformer ratios.
Fig. Connection example of residual current monitoring
via current transformers
L2 L3 N L1
Load
PE
C
It is not necessary to configure a
connection schematic for measurement
inputs I5 and I6.