Voltage regulator

1. R 450 A.V.R.
R 450 FOR SHUNT, AREP or PMG ALTERNATORS
1 - Description
R 450 is an analog A.V.R..
It is designed for alternators with a
SHUNT, AREP or PMG excitation .
R 250 controls the excitation current in order
to maintain the output voltage of the alternator.
R 250 is performant in terms of voltage
regulation, simple to set , to use and is reliable.
Rotating switch for U/f, LAM, excitation type and
voltage sensing are available.
and U.L. 508 / C.S.A. approved
2 - Operation range
LSA 40 42.2 43.2 44.2 46.2 47.2 49.1 50.2 51.2
Shunt - - - - - - - - -
AREP - - - - - - - - -
PMG - - - - - - - - -
Operation mode : Standalone
3 - Main feature and characteristics
- Voltage regulation : ± 0.5 %.
- Under-speed protection by function : Voltage
Knee 57 Hz
1 U/f (LAM : OFF). 60 Hz
2 U/f (LAM : MODE1). Knee
Auto-adaptating LAM + 2 U/f (LAM : MODE 2). 48 Hz
100 %
- Nominal excitation current : 6A. U/UN 50 Hz
- Maximum excitation current : 10A during 10 s.
- Supply range 150V (50Hz/60Hz).
. Frequency
50 Hz 60 Hz Hz
- Protection : fuse fast 10A.
- Protection on load, short-circuit (1) U/F function
and voltage reference loss.
Transient voltage drop
UN Max. speed drop with
LAM LAM
fN
the shaft (kW)
0,9
Load on
(U/f) 0,9 Variation in the load
without LAM without
0,8 with LAM LAM Load shedding due to LAM
Time 0,8 Time Time
0 1s 2s 0 1s 2s
0 1s 2s
(2) LAM Function
Ref : 4550en-2011.04/a Page 1

2. R 450 A.V.R.
4 - Opération conditions
- Operating temperature range : - 40° C à + 65° C.
- Storage temperature range : - 55° C à + 85° C.
- Hygrometry : 98%.
- Maximum choc : 9 g on 3 axis..
- Vibrations : less than 10 Hz , 2 mm peak magnitude.
From 10 Hz to 100 Hz : 100 mm/s, below 100 Hz : 8g.
Optional modules compatible
- R 731 : three phase voltage sensing.
- R 734 : 3-phase current and voltage sensing for parallel operation
- R 726 : regulation system changed to “4 - function”
5 - Connexion and setting
Settings are done through the A.V.R.
- Potentiometer P1 : voltage setting.
- Potentiometer P2 : stability setting.
- Potentiometer P3 : excitation.
- Rotating switch selection 1 : frequency, U/F function, LAM function
- Rotating switch selection 2 : alternator type and voltage sensing (1 ph. ou 3 ph.).
- Rotating switch selection 3 : excitation type (AREP or PMG) and time response.
- Potentiometer P4 : quadrature droop.
140 mm
4 holes Ø 6.5 mm 115 mm
50 Hz EXT FREQ
R 450 60 Hz SETTING
P1 Voltage
VOLT.
Rotating switch
LSA 49.1/50.2
LSA 49.1/50.2
ONLY FOR
65Hz
SPECIAL
CONFIG.
EXT.FREQ.
7000/8000 2
7000/8000
LAM OFF
RAPIDE
RAPIDE 3
LAM
LAM
OFF
KNEE
ON
FAST 2
FAST
SERIES
SERIES
- Lam and U/F P2
3 PHASES SENSING
1 PHASE SENSING
SHUNT / AREP
Stability
7
8
SET.
9
- Voltage
3
6
78
3PH.
STAB. I EXC
PMG
2
2
3
3
4 56
90 1
- Excitation 0 0
5
0
50Hz
60Hz
1 1 23
1k
1 5000/6000
0 NORMAL
0 LSA 46.2/47.2
1 NORMAL
4
1
LSA 46.2/47.2
NORMAL
NORMAL
3
2
5000 /6000
SERIES
SERIES
MODE 1
MODE 1
MODE 2
MODE 2
LAM
LAM
LAM
LAM
LAM
LAM
OFF
OFF
S1
S2
P3 Excitation
200 mm
175 mm
STAT.
LEDS
Overrun
P4 indications
Installation & maintenance manual :
www.leroy-somer.com
Quad
FUSIBLES / FUSES
droop
Fuses 10A
SEE NOTICE
VOIR NOTICE
380V 220 110 0V E- E+ Z2 X1 Z1 X2 C US
Ref : 4550en-2011.04/a Page 2