14
INSTALLATION AND MAINTENANCE
LSA 46.2 / 47.1
ALTERNATORS
INSTALLATION
Ref. 2981 GB - 4.33/a - 04.00
LEROY-SOMER
Checking the internal protection :
Open switch (D): the excitation current should increase to its
preset ceiling, remain at that level for
≥
10 seconds and then
drop to < 1A.
To reset, switch off the power supply by opening switch (A).
Note : After setting the excitation ceiling as described, adjust
the voltage again
( see section 3.5.2.) via P2.
(*): In some countries it is a legal requirement to have a short-
circuit current, so as to offer discriminating protection.
3.5.3 - Special type of use
- Field weakening
The exciter is switched off by disconnecting the AVR power
supply (1 wire on each auxiliary winding) – contact rating 16
A - 250V A.C.
Connection is identical for resetting the AVR internal
protection
- Field forcing
Applications
B volts
Time t
Guaranteed voltage build-up
12 (1A)
1 - 2 s
Parallel operation, de-energized
12 (1A)
1 - 2 s
Parallel operation, at standstill
24 (2A)
5 - 10 s
Frequency starting
48 (4A)
5 - 10 s
Sustained voltage on overload
48 (4A)
5 - 10 s
AREP / PMG
X2
Z1
X1
Z2
E+
X2
Z1
X1
Z2
E+
E-
Battery (B Volt)
+
-
t
(400V - 10A)
Exciter field
~ 10 ohms
Diode
t
B Volt
Forced excitation
Time
R 448
Содержание G 270
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Страница 125: ...EDITION JUNE2002 CPN 85623031 33519009601 ind1 GENERATOR PARTS LISTS GENERATOR MODEL G270...
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Страница 214: ...MOTEURS LEROY SOMER 16015 ANGOUL ME CEDEX FRANCE Imprimerie MOTEURS LEROY SOMER RC ANGOULEME B 671 820 223...