R.V.R. Electronica VJ3000, Maintenance Manual

Page: 15 / 50

R.V.R. ELETTRONICA S.r.l. (BO) Pag. 15
VJ3000 - Technical and Maintenance Manual
Three indicators show the presence of three phases (R, S and T) for
the Threephase version and the presence of the single phase for the
Monophase version.
1.4 PROTECTION FEATURES
The alarm panel (Fig.5 has a number of indicators of different colors:
the red indicators indicate a current condition, the yellow indicators
show that a previous alarm condition has now passed.
This circuit features the following protection: excess VSWR, excess grid
current, excess anode current, insufficient phase voltage, excess
temperature, panel open, insufficient ventilation and high voltage
supply inactive.
Two bicolor leds (red/green) are situated on this panel indicating excess
grid current together with two indicators which indicate if protection
is active or not, and a key switch.
Furthermore there are two switches, one to diplay filament warm-up time
or the number of reset cycles which the protection circuit has performed
upto that moment; the other to reset the protection circuit, the memories
and the protection reset counter.
Finally a four digit display shows times or cycles with the two left-
hand digits and the temperature of the air begin expelled in°C on the
two right-hand digits.
1.5 SPECIFICATIONS
Please refer to Table A for the electrical specifications and Table
B for the mechanical specifications.