14
2012.03 / e
LEROY-SOMER
Installation and maintenance
R 450
AVRs
4531 en -
4 - INSTALLATION - COMMISSIONING
4.1 - Electrical checks on the AVR
- Check that all connections have been
made properly as shown in the attached
wiring diagram.
- Check the rotating switches selections
- frequency,
- type of alternator,
- normal position (response time),
- external potentiometer,
- rated voltage,
- secondary current of the CT used,
- type of excitation.
- R450 optional operating modes
4.2 - Setting up
The various adjustments during tests
must be made by a qualified engineer. It
is essential that the drive speed
specified on the nameplate is reached
before commencing adjustment. After
operational testing, replace all access
panels or covers.
The AVR is used to make any
adjustments to the machine.
4.2.1 - Setting up the R450
Before using the AVR, make sure that
the rotating switches have been
correctly configured with AREP/SHUNT
or PMG excitation
a)
Initial potentiometer settings (see table
below)
Action Factory setting Pot.
P1
P2
P3
P4
10 A
maximum
400 V - 50 Hz
Not set
(centre position)
Not set
(fully
anti-clockwise)
Excitation ceiling
- Factory-sealed
Voltage quadrature droop
(// operation with C.T.)
- 0 quadrature droop fully
anti-clockwise
Voltage
minimum fully
anti-clockwise
Stability
Stability adjustments in standalone
operation
b)
Install a D.C. analogue voltmeter (needle
dial) cal. 100 V on terminals F+, F- and an
A.C. voltmeter cal. 300 - 500 or 1000 V on
the alternator output terminals.
c
)
Check the rotating switch selection.
d)
Voltage potentiometer P1 at minimum,
fully anti-clockwise.
e
) Stability potentiometer P2 around 1/3 in
from the anti-clockwise stop.
f
) Start the engine and set its speed to a
frequency of 48 Hz for 50 Hz, or 58 for
60 Hz.
g
) Set the output voltage to the desired
value using P1.
- Rated voltage U
N
for solo operation
(eg. 400 V)
- Or U
N
+ 2 to 4% for parallel operation with
C.T. (eg. 410 V -)
If the voltage oscillates, use P2 to make
adjustments (try both directions), observing
the voltage between F+ and F- (approx.
10 V D.C.). The best response time is
obtained at the limit of the instability. If no
stable position can be obtained, try selecting
the fast position.
h
) Check LAM operation: depending on the
rotating switch selection.
274/297
Summary of Contents for R570U
Page 1: ...User and maintenance manual for generating sets R570U 33504081501NE_1_1 ...
Page 15: ...Alternator Cabinet Figure 1 3 Examples of identification plates 13 297 ...
Page 18: ...Sockets voltage 208 120V 16 297 ...
Page 125: ...9 Appendix 9 1 Appendix A Engine user and maintenance manual 123 297 ...
Page 126: ...124 297 ...
Page 128: ...126 297 ...
Page 129: ...OPERATOR S MANUAL Generating set and industrial engines 16 liter EMS 2 127 297 ...
Page 159: ...157 297 ...
Page 218: ...216 297 ...
Page 220: ...218 297 ...
Page 222: ...7748681 English 12 2011 220 297 ...
Page 223: ...9 2 Appendix B Alternator user and maintenance manual 221 297 ...
Page 224: ...222 297 ...
Page 226: ...224 297 ...
Page 250: ...www leroy somer com 248 297 ...
Page 261: ...Installation and maintenance R250 A V R 4067 en 2009 05 b LEROY SOMER 11 259 297 ...
Page 281: ...2012 03 e LEROY SOMER 19 Installation and maintenance R 450 AVRs 4531 en 279 297 ...
Page 282: ...www leroy somer com 280 297 ...