3.6 The function "Delayed Trip"
3.6.1 Operating principle
The function "
Delayed Trip
" provides a user-configurable, time-delayed response to an increased output current (I
out
)
higher than the set current (I
set
). The response to this kind of event can be, for example, to ramp down the channel with
the programmed ramp. A detailed description for the configuration can be found in the
By a programmable timeout with one millisecond resolution, the trip can be delayed up to four seconds. During this time,
the output current is limited to the value of I
set
(constant current mode).
The hardware regulation signals, constant voltage (CV) or constant current (CC), are sampled every millisecond by the
microprocessor. Once the constant current mode is active, the programmed timeout counter is decremented. If the HV
channel returns to constant voltage mode before timeout (i.e. I
out
< I
set
), the counter will be reset. So this process can be
restarted if the current rises again.
To guarantee a sufficient resolution for the current set values, a nominal current adequate to the application should be
selected. iseg offers HV modules with nominal currents reduced to 100 μA in all voltage classes. These are designated e.g.
for semiconductor detectors, which only require a few microampere operating current.
NHS – NIM standard High Voltage Power Supply | Last changed on: 16.01.2020 |
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