NGPS – User’s Manual
28
Earth Leakage Current
This protection continuously monitors the current flowing to earth and it has a
settable threshold [A] that can be modified by experienced users. The tripping of this
protection generates a fault condition that shuts off the power supply output.
Earth Fuse
An earth fuse is present on the rear side of each NGPS and it is rated at 5 A, 500
V (F5AH500VAC). The blowing of this fuse generates a fault condition of the power
unit and the fuse needs to be replaced in order to get rid of the fault condition before
resetting the NGPS internal status register. The fuse holder is shown in
Figure 12:
Earth fuse holder
In case of replacement, always use a fuse with the same characteristics:
Fast Acting Fuse (33.2 A
2
s)
Size 6.3 x 32 mm 5 A, 500 V
Breaking capacity 1500 A @ 400 VDC
(Example Schurter F5AH500VAC, code 8020.5075.G or equivalent)
Regulation Fault
This fault is generated when the power supply is not able to correctly regulate
the output current or output voltage (in C.C. or C.V. mode, respectively).
A threshold for the differential current, differential voltage and the intervention
time can be set by experienced users.
CAUTION
