Operating manual 810378-BAL-EN-170330
Mach/30 2017
Page 26 of 54
7.5.1.
Constant voltage operation
Closed control circuit system with direct feedback of the actual value of the high volt-
age output. In constant voltage mode, the set output voltage is held constant by a con-
trol device, independent of variable operating currents up to the performance limit of
the high voltage device.
NOTE this operating mode is typically labeled with U
k
.
To work in this operating mode the target value I Limit must be set higher than the tar-
get value I max.
The switch off threshold I
ü
must take local and operational
conditions into consideration, then be determined and docu-
mented.
In the case of a non-permitted increase in operating current I
b
check that high voltage is shut down when the threshold value
I
ü
is reached.
During first inspection check the determined threshold value I
ü
.
It is not permitted to have a threshold value l
ü
, where hazard-
ous discharges or electrical arc between high voltage leading
and grounded parts of the system can be calculated on, if the
permitted safety distance is not achieved.
