Bender ISOMETER isoRW425 Manual page 19

Insulation monitoring device for unearthed it ac-, ac/dc and dc systems (it systems) for railway applications up to 3(n)ac, ac/dc 440 v
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Function
E.07
E.08
Internal device errors "E.xx" can be caused by external disturbances or inter-
nal hardware errors. If the error message occurs again after restarting the
device or after a reset to factory settings (menu item "FAC") , the device must
be repaired.
After eliminating the fault, the alarm relays switch back automatically or they
return to the initial position by pressing the reset button.
The self test can take a few minutes. It can be suppressed for the duration of
the device start by setting the parameter in the menu "SEt" to
"S.Ct = off". This allows the ISOMETER® to enter measurement mode quickly
after connecting the supply voltage U
Automatic self test
After switching on the supply voltage U
peats it every 24 h (selectable: off, 1h, 24 h).
Manual self test
A self test is initiated by pressing the test button for a period greater than
1.5 s. While pressing the internal test button "T", all display elements available
for this device are shown.
isoRW425_D00052_04_M_XXEN/03.2019
The maximum permissible system leakage capacitance
C
is exceeded
e
Action:
Device not suitable for the existing leakage capacitance:
uninstall device.
Calibration error during the device test
Action:
If the error continues to exist after checking the device con-
nections, there is an error inside the device.
.
s
, the device runs a self test and re-
s
19

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