janitza UMG 509-PRO, User Manual And Technical Data, Page: 60 / 116

UMG 509-PRO
60
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Residual current transformer
When using the residual current inputs I5 and I6,
the corresponding transformer ratios of the resid-
ual current transformers used must be set.
Setting range:
Primary
1 .. 1000000
Secondary 1
Factory default setting:
Primary
127
Secondary 1
This menu is also used to set the failure monitor-
ing of the corresponding residual current inputs:
· Activated - Switches on the failure monitoring
for the residual current measurement.
· Deactivated - Switches off the failure monitoring
for the residual current measurement.
Lock transformer ratios
Locking/unlocking of the current and voltage
transformer ratios can be done via the display.
The status can be read out via an internal device
address:
·If the entry "Lock all transformers" contains the
value "no", the registers are not locked (neither
current transformer (CT) nor voltage transformer
(VT) ratios).
·If the entry "Lock all converters" contains the
value "yes", the registers are locked
(CT and VT ratios).
Modbus
addr.
Value / Function
19716 Lock transformer ratios
0 = not locked
1 = locked
Fig. Lock transformer ratios
INFORMATION
· A Modbus address list for your device can
be found in the download area at www.
janitza.com.
Fig. Configuration of residual current trans-
former
Fig. Configuring residual current measurement
monitoring