Megger TDS40, Operating Manual, Page: 62 / 71

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7.5.3 Operational Messages about Switching Conditions
The following operational messages inform the user about the switching conditions prior to
"HVOn" and about the cause of shut-down after "HVOff". These messages need to be
confirmed by the operator with "OK" unless they disappear on their own accord after
having set a switching condition.
Code Cl. Operational
message
Description Input
- C Checking...
After the parameters have
been set, the switching
conditions are being
queried.
No action required,
only information
- C HV interlock Detachable key switch is
switched off.
Switch detachable key
switch on
- C Emergency switch Internal emergency switch
has tripped.
Switch emergency
switch on
- C Ext. safety loop External safety loop is
open.
Close emergency loop
- C Door contact(s) At least one door contact
is open.
Close doors of vehicle
- C Module coupling Connection between
modules is interrupted..
Connect modules
- C SF6 pressure SF6 gas pressure in HV
switching system is below
rated value.
Gas pressure monitor
at present not funct-
ional, check signal on
module
- C Humidity sensor Degree of dew condens-
ation on system is above
permissible limit.
Dew monitor at present
not functional, check
signal on module, if
need be
- C HV connector The HV cable is not
properly connected at the
HV connector
Connect the HV cable
- C Ground monitor Earth monitoring is
reporting inadequate
protective earth
connection.
Check the electrical
connections /
grounding conditions
- C Cable shield Earth monitoring is
reporting inadequate
operational earth
connection.
Check the electrical
connections /
grounding conditions