Leroy-Somer AVR R250 Instruction Manual

Page 1
Instruction Manual
Installation • Operation • Maintenance
Voltage Regulator
Ruitai industry Co.,Ltd.
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.china-avr.com
AVR R250

Thismanualistobegivento
theenduser
4067 en - 11.2006 / a
R250
A.V.R.
Installation and maintenance
140 mm
75 mm
R 250
VOLT
VOLT
FREQ. & L.A.M. CONFIG.
FREQ. & L.A.M. CONFIG.
STAB
STAB
F1
Slow fuse
250V 8 A
P1
Voltage
P2
Stability
110
E+ E-
0V
0
9
8
7
6
5
4
3
2
1
o
1
2
3
5
6
7
9
8
4
60Hz
60Hz
65Hz
65Hz
57Hz
57Hz
47.5Hz
47.5Hz
50Hz
50Hz
KNEE
KNEE
SPECIAL
SPECIAL
LAM
LAM
OFF
OFF
OFF
OFF
13%
13%
13%
13%
25%
25%
25%
25%
LAM
LAM
KNEE
KNEE
KNEE
KNEE
LAM OFF
LAM OFF
LAM OFF
LAM OFF
LAM OFF
LAM OFF
External potentiometrer
for voltage adjusting
ST4
Option
Fre
q
/ 60
and

Installation and maintenance
R250
A.V.R.
2
LEROY-SOMER 4067 en - 11.2006 / a
SAFETY MEASURES
Before using your machine for the first time,
it is important to read the whole of this
installation and maintenance manual.
All necessary operations and interventions
on this machine must be performed by a
qualified technician.
Our technical support service will be
pleased to provide any additional
information you may require.
The various operations described in this
manual are accompanied by
recommendations or symbols to alert the
user to potential risks of accidents. It is vital
that you understand and take notice of the
following warning symbols.
Warning symbol for an operation
capable of damaging or destroying the
machine or surrounding equipment.
Warning symbol for general danger to
personnel.
Warning symbol for electrical danger to
personnel.
Note : LEROY-SOMER reserves the right
to modify the characteristics of its products
at any time in order to incorporate the latest
technological developments.
The information contained in this document
may therefore be changed without notice.
WARNING
WARNING
This manual concerns the alternator A.V.R. which you have just purchased.
We wish to draw your attention to the contents of this maintenance manual. By
following certain important points during installation, use and servicing of your A.V.R.,
you can look forward to many years of trouble-free operation.

Installation and maintenance
R250
A.V.R.
4067 en - 11.2006 / a
LEROY-SOMER
3
SUMMARY
1 - SUPPLY .............................................................................................................................4
1.1 - SHUNT excitation system............................................................................................4
2 - R250 A.V.R. .......................................................................................................................5
2.1 - Characteristics .............................................................................................................5
2.2 - U/F fonction and LAM..................................................................................................5
2.3 - R250 A.V.R. option......................................................................................................5
2.4 - LAM Characteristics ....................................................................................................6
2.5 - Typical effects of the LAM ...........................................................................................7
3 - INSTALLATION - COMMISIONING ..................................................................................8
3.1 - Electrical checks on the AVR.......................................................................................8
3.2 - Settings........................................................................................................................8
3.3 - Electrical faults.............................................................................................................9
4 - SPARE PARTS................................................................................................................10
4.1 - Designation................................................................................................................10
4.2 - Technical support service..........................................................................................10
Any maintenance or breakdown operations on the A.V.R. are to be done by personnel
trained on commisioning, servicing and maintenance for the electrical and mechanical
elements.
Copyright 2005: MOTEURS LEROY-SOMER
This document is the property of:
MOTEURS LEROY SOMER.
It may not be reproduced in any form without prior authorization
All brands and models have been registered and patents applied for.

Installation and maintenance
R250
A.V.R.
4
LEROY-SOMER 4067 en - 11.2006 / a
1 - SUPPLY
1.1 - SHUNT excitation system
The SHUNT excitation alternator is auto-
excited with a R 250 voltage regulator.
The regulator controls the excitation
current according to the alternator’s output
voltage. With a very simple conception, the
SHUNT excitation alternator does not have
a short circuit capacity.
4 x holes Ø 5.8 x
50 x 115 mm
140 mm
75 mm
SHUNT SYSTEM
Field
Induced
T1 T2 T3
T4 T5 T6
Varistor
5+ 6-
T7 T8 T9
T10 T11 T12
STATOR : 12 wires (marking T1 to T12)
MAIN FIELD
R 250
VOLT
VOLT
FREQ. & L.A.M. CONFIG.
FREQ. & L.A.M. CONFIG.
STAB
STAB
F1
Slow fuse
250V 8 A
P1 Voltage
P2 Stability
110
E+ E-
0V
0
9
8
7
6
5
4
3
2
1
o
1
2
3
5
6
7
9
8
4
60Hz
60Hz
65Hz
65Hz
57Hz
57Hz
47.5Hz
47.5Hz
50Hz
50Hz
KNEE
KNEE
SPECIAL
SPECIAL
LAM
LAM
OFF
OFF
OFF
OFF
13%
13%
13%
13%
25%
25%
25%
25%
LAM
LAM
KNEE
KNEE
KNEE
KNEE
LAM OFF
LAM OFF
LAM OFF
LAM OFF
LAM OFF
LAM OFF
External potentiometrer
for voltage adjusting
ST4 Option
Frequency selector 50 Hz
/ 60 Hz for U/F fonction
and LAM adjustement

Installation and maintenance
R250
A.V.R.
4067 en - 11.2006 / a
LEROY-SOMER
5
2 - R250 A.V.R.
2.1 - Characteristics
- Voltage regulation: around ± 0,5 %.
- Supply range/voltage detection 85 to 139 V
(50/60Hz).
- Rapid response time (500 ms) for a
transient voltage variation amplitude of
± 20 %.
- Voltage setting P1.
- Stability setting P2.
- Supply protected with an 8 A fuse, slow
action (supports 10 A for 10 s).
2.2 - U/F Fonction and LAM
The threshold position (50 Hz - 60 Hz) to
action the U/F fonction as well as the LAM
setting type is selected using the
potentionmeter.
WARNING: The jumper settings must
correspond to the rated operating
frequency (see the nameplate on the
alternator).
Risk of destruction for the alternator.
The threshhold position and LAM fonction
settings are done with the jumper.
Operating at 50 Hz: (U/F gradient)
0: threshold at 48 Hz without LAM for
impacts between 30 and 40% of the rated
load.
1: threshold at 48 Hz with LAM 13% for
impacts between 40 and 70% of the rated
load.
2: threshold at 48 Hz with LAM 25% for
impacts > 70% of the rated load.
Operating at 60 Hz: (U/F gradient)
3: threshold at 58 Hz without LAM for
impacts between 30 and 40% of the rated
load.
4: threshold at 58Hz with LAM 13% for
impacts 40 and 70% of the rated load.
5: threshold at 58Hz with LAM 25% for
impacts > 70% of the rated load.
Specific operating
6: threshold at 57Hz without LAM for speed
variations at a steady state > 2 Hz
7: threshold at 65Hz without LAM for
variable speed and tractelec / gearlec (U/F
gradient).
8: special: the factory setting 48Hz 2U/F
gradient ; a special programme is possible
on request. This programme must be
specified before ordering, during the
project study.
9: threshold at 47.5 Hz without LAM for
speed variations at a steady state > 2 Hz
2.3 - R250 A.V.R. option
Potentiometer for voltage setting, 1000 :/
0,5 W min: setting range ± 5 %.
- Remove the ST4 jumper.
0
9
8
7
6
5
4
3
2
1
o
1
2
3
5
6
7
9
8
4
60Hz
60Hz
65Hz
65Hz
57Hz
57Hz
47.5Hz
47.5Hz
50Hz
50Hz
KNEE
KNEE
SPECIAL
SPECIAL
LAM
LAM
OFF
OFF
OFF
OFF
13%
13%
13%
13%
25%
25%
25%
25%
LAM
LAM
KNEE
KNEE
KNEE
KNEE
LAM OFF
LAM OFF
LAM OFF
LAM OFF
LAM OFF
LAM OFF

Installation and maintenance
R250
A.V.R.
6
LEROY-SOMER 4067 en - 11.2006 / a
2.4 - LAM characteristics (Load
Acceptance Module)
2.4.1 - Voltage drop
The LAM system is integrated in the A.V.R.
It is active as standard. It can be adjusted
to 13% or 25%.
- Role of the «LAM» (Load Adjustment
Module):
On application of a load, the rotation speed
of the generator set decreases. When it
passes below the preset frequency
threshold, the LAM causes the voltage to
drop by approximately 13% or 25% and
consequently the amount of active load
applied is reduced by approximately 25%
to 50%, until the speed reaches its rated
value again.
Hence the "LAM" can be used either to
reduce the speed variation (frequency) and
its duration for a given applied load, or to
increase the applied load possible for one
speed variation (turbo-charged engines).
To avoid voltage oscillations, the trip
threshold for the "LAM" function should be
set approximately 2 Hz below the lowest
frequency in steady state.
It is advised to use the "LAM" at 25% for
load impacts > at 70% of the genset rated
power.
2.4.2 - Gradual voltage return function
During load impacts, the function helps the
genset to return to its rated speed faster
thanks to a gradual increase in voltage
according to the following principles:
- if the speed drops between 46 Hz and 50 Hz,
the rated voltage follows a fast gradient as
it is restored.
- if the speed drops below 46 Hz, since the
engine needs more help, the voltage
follows a slow gradient as it returns to the
reference value.
LAM
U
N
048 or 58 Hz
0
,85 U N
Voltage
U/f
50 or 60 Hz
fC fN
Voltage
ST3
0
Tim
e
Drop N < 46 Hz
U
Drop N > 46 Hz

Installation and maintenance
R250
A.V.R.
4067 en - 11.2006 / a
LEROY-SOMER
7
2.5 - Typical effects of the LAM with
a diesel engine or without a LAM (U/
F only)
2.5.1 - Voltage
2.5.2 - Frequency
2.5.3 - Power
U
N
0
0,9
0,8
(U/f)
with
LAM Tim
e
without LAM
1 s 2 s 3 s
Transient voltage drop
0
,9
0
,8
f
N
Max speed drop
0
with
LAM
Tim
e
without
LAM
1 s 2 s 3 s
01 s 2 s 3 s
Tim
e
LAM
Load variation
Load on
shaft (kW)
Shedding due to "LAM"

Installation and maintenance
R250
A.V.R.
8
LEROY-SOMER 4067 en - 11.2006 / a
3 - INSTALLATION -
COMMISSIONING
3.1 - Electrical checks on the AVR
- Check that all connections have been
made properly as shown in the attached
wiring diagram.
- Check that the position of the jumper
corresponds to the operating frequency.
- Check whether the ST4 jumper or the
remote adjustment potentiometer have
been connected.
3.2 - Settings
The different settings made during the
trial are to be done by qualified
personnel. Respecting the load speed
specified on the nameplate is vital in
order to start a settings procedure. After
operational testing, replace all access
panels or covers.
The only possible settings on the
machine are to be done with the A.V.R.
3.2.1 - R250 settings (SHUNT system)
Initial potentiometer positions
- voltage setting potentiometer P1 for the
A.V.R.: full left
- remote voltage setting potentiometer: in
the middle.
Operate the alternator at its rated speed: if
the voltage does not rise it is necessary to
re-magnatise the magnetic circuit.
- slowly adjust the voltage potentiometer of
the A.V.R. P1 until the output voltage
reaches its rated value.
- Stability setting with P2.
3.2.2 - Special type of use
Excitation circuit E+, E- must not be left
open when the machine is running:
A.V.R. damage will occur.
3.2.2.1 - R250 field weakening (SHUNT)
The exciter is switched off by disconnecting
the A.V.R. power supply (1 wire - 0 or 110V).
Contact rating: 16A - 250V AC
3.2.2.2 - R250 field forcing
The battery must be isolated from the
mass.
Exciter field may be at line potential.
WARNING
WARNING
E+
E-
0V 110
Battery (B Volt)
+
-
t
(400V - 10A)
Excitation Inducer
Diode
E+
E-
0V 110

Installation and maintenance
R250
A.V.R.
4067 en - 11.2006 / a
LEROY-SOMER
9
3.3 - Electrical faults
Warning: after setting-up or trouble-
shooting, replace all access panels or
covers.
Fault Action Effect Check/cause
No voltage at
no load on
start-up
Connect a new battery
of 4 to 12 volts to
terminals E- and E+
respecting the polarity
for 2 to 3 seconds
The alternator starts up and its
voltage is still correct when the
battery is removed.
- Lack of residual magnetism
The alternator starts up but its
voltage does not reach the rated
value when the battery is
removed.
- Check the connection of the voltage
reference to the A.V.R.
- Faulty diodes
- Induced short circuit
The alternator starts up but its
voltage disappears when the
battery is removed
- Faulty A.V.R.
- Exciter field short-circuited
- Short-circuit in the main field. Check the
resistance
Voltage too
low
Check the drive speed
Correct speed
Check the A.V.R. connections (A.V.R. may
be faulty)
- Field windings short-circuited
- Rotating diodes burnt out
- Main field winding short-circuited
- Check the resistance
Speed too low
Increase the drive speed
(Do not touch the A.V.R. pot (P1) before
returning to the correct speed.)
Voltage too
high
Adjust A.V.R.
potentiometer
Adjustment ineffective - Faulty A.V.R.
- 1 faulty diode
Voltage
oscillations
Adjust A.V.R. stability
potentiometer
- Check the speed: possibility of cyclic
irregularity
- Loose terminals
- Faulty A.V.R.
- Speed too low on load
(or U/F gradient set too high)
Voltage
correct at no
load and too
low when on
load (*)
Run at no load and
check the voltage
between E+ and E- on
the A.V.R.
- Check the speed (or U/F gradient set too
high)
- Faulty rotating diodes
- Short-circuit in the main field. Check the
resistance
- Faulty induced excitaion
(*) Warning: For single-phase operation, check that the sensing wires coming from the A.V.R. are correctly connected to
the operating terminals (see the alternator manual).
Voltage
disappears
during
operation
Check the A.V.R., the
surge suppressor, the
rotating diodes and
replace any defective
components
The voltage does not return to the
rated value.
- Exciter winding open circuit
- Faulty induced excitation
- Faulty A.V.R.
- Main field open circuit or short-circuited