Installation - Commissioning; Electrical Checks On The Avr; Settings - SDMO R33C3 User And Maintenance Manual

LEROY-SOMER

3 - INSTALLATION - COMMISSIONING

3.1 - Electrical checks on the AVR

- Check that all connections have been
made properly as shown in the attached wi-
ring diagram.
- Check that the ST3 frequency selection
jumper is on the correct frequency setting.
- Check whether the ST4 jumper or the re-
mote adjustment potentiometer have been
connected.
- Optional operating modes.
• ST1 jumper : open to connect the R 731or
R 734 3-phase
sensing module.
• ST2 jumper : open if rapid response time
used
• ST5 jumper : open to suppress the LAM
function.

3.2 - Settings

The machine is tested and set at the fac-
tory. When first used with no load, make
sure that the drive speed is correct and
stable (see the nameplate). After opera-
tional testing, replace all access panels
or covers.
The only possible adjustments to the
machine should be made on the AVR.
3.2.1 - R438 settings (AREP or PMG
system)
WARNING
Before any intervention on the A.V.R.,
make sure that the ST9 jumper is closed
with AREP excitation and disconnected
with PMG or SHUNT or separate excita-
tion.
Installation and maintenance
R438
A.V.R.
a) Initial potentiometer settings (see table
below)
- Remote voltage adjustment potentiometer :
centre (ST4 jumper removed).
Voltage
minimum fully anti-clockwise
Stability
Voltage quadrature droop
(// operation with C.T.)
- 0 quadrature loop fully
anti-clockwise.
Excitation ceiling
Limit of excitation and
short-circuit current,
minimum fully anti-clockwise.
Stability adjustments in standalone
operation
b) Install a D.C. analogue voltmeter (needle
dial) cal. 50V on terminals E+, E- and an
A.C. voltmeter cal 300 - 500 or 1000V on the
alternator output terminals.
c) Make sure that the ST3 jumper is positio-
ned on the desired frequency (50 or 60 Hz).
d) Voltage potentiometer P2 at minimum,
fully anti-clockwise.
e) Stability potentiometer P3 to around 1/3
of the anti-clockwise limit.
f) Start the engine and set its speed to a fre-
quency of 48 Hz for 50 Hz, or 58 for 60 Hz.
g) Set the output voltage to the desired va-
lue using P2.
- Rated voltage UN for solo operation (eg.
400 V)
- Or UN + 2 to 4% for parallel operation with
C.T. (eg. 410 V)
If the voltage oscillates, use P3 to make ad-
justments (try both directions) observing the
voltage between E+ and E- (approx. 10V
D.C.).
235/242
3971 en -
Action
Factory setting
400V - 50 Hz
(Input
0 - 380 V)
Not set
(centre position)
Not set
(fully anti-
clockwise)
10 A
maximum
2010.11 / f
Pot.
P2
P3
P1
P5
9