SDMO R 340 U User And Maintenance Manual page 266

LEROY-SOMER
When the excitation current is set to the
rated value, a voltage dip is observed in
excitation current
limitation is activated and the current
limit is reached.
4.2.3 - Special type of use
WARNING
The excitation circuit F+, F- must not be
left open when the machine is running:
this will irreparably damage the AVR.
4.2.3.1 - R450 (SHUNT) field weakening
X2
Z1
X1
Z2
E+
E-
The exciter is switched off by disconnecting
the AVR power supply (1 wire - X1 or X2)
Contact rating: 16 A - 250 V A.C.
4.2.3.2 - R450 (AREP/PMG) field
weakening
X2
Z1
X1
Z2
E+
E-
16
Installation and maintenance
R 450
AVRs
limit when the
The exciter is switched off by disconnecting
the AVR power supply (1 wire on each
auxiliary winding) - contact rating 16 A -
250 V A.C.
Connection is identical for resetting the AVR
internal protection.
If field weakening is used, provide field
forcing.
4.2.3.3 - R450 field forcing
X2
Z1
X1
Z2
E+
E-
Field forcing
B Volt
Applications
Guaranteed voltage build-up
Parallel operation, de-energized
Parallel operation, at standstill
Frequency starting
Sustained voltage on overload
264/285
4531 en - 2012.03 / e
Diode
(400V - 10A)
+
-
t
Battery (B Volt)
Exciter field winding
t
Time
B Volt Time t
12 (1A) 1 - 2 s
12 (1A) 1 - 2 s
12 (1A) 5 - 10 s
12 (1A) 5 - 10 s
12 (1A) 5 - 10 s