3.5 Delayed Trip
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 manual “CAN_EDCP_Programmers-Guide.pdf”,
see chapter 10 Appendix.
By a programmable timeout with one millisecond resolution, the trip can be delayed up to four seconds. If the measured current
exceeds the set current the programmed timeout counter is decremented, keeping the output voltage. If the current returns to a
value < I
set
before timeout the counter will be reset. So this process can be restarted if the current rises again.
Note that the actual current is acquired approximately every 150ms, which can lead to delays in the detection of an exceeded or
again reduced current.
If the current at any time exceeds the hardware current limit (about 30% above the current limit value set by the limit
potentiometer) the channel will be shut off without delay and ramp.
If the
Delayed Trip
function is activated the voltage ramp should be limited to 1 % of V
nom
before. Higher values could trigger a trip
by internal charge balancing during a ramp, even though the output current does not exceed the set value I
set
.
If the connected load contains capacities or if I
set
is very small, it might be necessary to further reduce the ramp speed.
Alternatively, the
Delayed Trip
can be activated only after the completion of the ramp.
INFORMATION
INFORMATION
An activated KillEnable feature disables the Delayed Trip function.
An active
KillEnable
function disables the
Delayed Trip
function. If
KillEnable
is active and a trip occurs, the channel is shut down
without ramp. However, the actual discharge time strongly depends on the connected load.
4 Options
4.1 SLA – Active safety loop
Actively opens the Safety loop in case of a trip or a delayed trip. This option allows to shut down other modules and devices by
interrupting the SL when a trip is detected.
4.2 SLP – Internally powered safety loop
Internal current source for the Safety Loop (no galvanic isolation of the SL and the crate GND).
EDS High Voltage Power Supply series | Last changed on: 17.06.2020 |
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