FAST-Bi-1K5 – User’s Manual
41
Figure 28:
Earth fuse housing.
Regulation Fault
This fault is generated when the PS is not able to properly regulate either in C.C.
or in C.V. Thresholds for the differential current and differential voltage and
intervention time can be set by experienced users. The tripping of this fault disables the
PS output. A reset of the PS fault status register needs to be performed in order to be
able to enable the PS output again.
E.g. Consider a 10-Ω load connected to a FAST-Bi-1K5 3050 (i.e. the maximum
output voltage is 50 V). By setting a current of 10 A in C.C. mode, the output voltage
should reach a value of 100 V, which is not feasible; so that, once the PS reaches 5 A,
it has already hit its maximum output voltage condition. The PS recognizes that is not
able to cover the difference between the set-point (i.e. 10 A) and the actual output
current and generates a “regulation fault” condition.
DCCT Error
The PS is continuously monitoring the status of the DCCT. If the DCCT
experiences a fault, this is directly detected and the PS output switched OFF.
OVerPower - OVP
The FAST-Bi-1K5 can work continuously at a 2% over its power rating as
expressed in the specifications,
either in source or sink operation
. The module is able
to work at a power comprised between 2% and 5% over its rating – i.e. between 102%
and 105% – for a 120-second period before turning off on an over-power fault. If the
actual output power drawn from the PS is more than 5% above its nominal ratings the
PS output is automatically disabled after 1 second. This behaviour is summarized in the
following Table 11 (an example of a FAST-Bi-1K5 150 A 10 V is also listed):
