R.V.R. Electronica VJ3000, Руководство по обслуживанию

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 18
VJ3000 - Technical and Maintenance Manual
SECTION 2
ELECTRICAL DESCRIPTION
2.1 INTRODUCTION
This chapter describes, in detail, the operating theory of the
VJ3000.
To aid understanding, the unit has been subdivided into modules (Fig.2),
each of which is fully described below.
2.2 AUXILIARY POWER SUPPLY
A) THREEPHASE VERSION
The auxiliary power supply is positioned vertically and situated on
the left side of the unit.
It comprises: three soft-start resistors (R2, R3 and R4) for the high
voltage anode transformer (10 Fig.7); three solenoid switches TE1, TE2
and TE3 (14, 11 and 12 Fig.7) for switching of filament voltage and high
voltages; the services transformer T1 (7 Fig.7); the PROT-IN card (1
Fig.7) which acts as an interface between the alarm card and the high
voltage section; a diode bridge, D13 (2 Fig.7) to rectify the output of
the services transformer; an anti-flash resistor (R8) on the anode supply
(9 Fig.7); a polarization resistor (R1) for the filament voltage (8
Fig.7); a resistor (R6) for monitoring grid current (3 Fig.7); a resistor
(R9)for monitoring anode current (6 Fig.7); the IG-TRIODE card for
monitoring grid current (4 Fig.7); the PLATE MEASURE card for monitoring
anode current (5 Fig.7) and the A.C. Control Line (13 Fig.7).
It is possible to provide the equipment with a voltage stabilizer (220V
1KW) that ensures the stability of the tube filament voltage.
B) MONOPHASE VERSION
The auxiliary power supply is positioned vertically and situated on
the left side of the unit.
It comprises: one soft-start resistor (R4) for the high voltage anode
transformer (11 Fig.7B); three solenoid switches TE1, TE2 and TE3 (4,
5 and 6 Fig.7B) for switching of filament voltage and high voltages; the
services transformer T1 (3 Fig.7B); the PROT-IN card (1 Fig.7B) which
acts as an interface between the alarm card and the high voltage section;
a diode bridge, D13 (2 Fig.7B) to rectify the output of the services
transformer; an anti-flash resistor (R8) on the anode supply (10 Fig.7B);
a polarization resistor (R1) for the filament voltage (9 Fig.7B); a
resistor (R6) for monitoring grid current (13 Fig.7B); a resistor (R9)
for monitoring anode current (7 Fig.7B); the IG-TRIODE card for
monitoring grid current (12 Fig.7B); the PLATE MEASURE card for
monitoring anode current (8 Fig.7B).
It is possible to provide the equipment with a voltage stabilizer (220V