FAST-Bi-1K5 – User’s Manual
43
The crow-bar circuit is powered with a super-capacitor which is capable, if
completely charged, of maintaining active the crow-bar circuit up to 4 consecutive days
(if mains are not present). The super-capacitor is recharged completely in 1 minute
when the PS is connected to the AC Mains.
Crow-Bar Enable: rear panel connector
This connector is reserved for future uses.
Figure 29:
Crow-bar enable connector on the rear panel.
Quench
This protection makes the FAST-Bi-1K5 a perfect fit for superconducting
magnet operation. The PS continuously monitors the output voltage and current at the
output and, as soon as a quench condition is detected, it turns off and triggers the crow-
bar protection. Quench intervention time and thresholds are configurable by the user,
in order to perfectly match the specific load.
The working operation of the quench protection are sketched in
Figure 30
: Quench detection working principle.
