Nidec Leroy-Somer R180 Instruction Manual

R180
AVR
Installation and maintenance

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
SAFETY MEASURES
Before using your machine for the rst 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
qualied 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 recommenda-
tions or symbols to alert the user to potential
risks of accidents. It is vital that you unders-
tand 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.
All servicing or repair operations perfor-
med on the AVR should be undertaken by
personnel trained in the commissioning,
servicing and maintenance of electrical
and mechanical components.
When the generator is driven at a
frequency below 28 Hz for more than 30
seconds with an analogue AVR, its AC
power supply must be disconnected.
WARNING
This AVR can be incorporated in a EC-
marked machine.
This manual is to be given to the end
user.
© - We reserve the right to modify the
characteristics of this product at any time in
order to incorporate the latest technological
developments. The information contained in
this document may therefore be changed
without notice.
This document may not be reproduced in
any form without prior authorisation.
All brands and models have been registered
and patents applied for.
WARNING
This manual concerns the alternator AVR which you have just purchased.
We wish to draw your attention to the contents of this maintenance manual.

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
CONTENTS
1 - GENERAL DESCRIPTION.................................................................................................4
2 - AVR PARAMETERS...........................................................................................................5
3 - TECHNICAL SPECIFICATION...........................................................................................6
4 - MAIN FUNCTION OF THE AVR .........................................................................................7
4.1 - Connection diagram for low voltage range.....................................................................7
4.2 - Connection diagram for high voltage range with droop powered by AREP.....................8
4.3 - Connection diagram for high voltage range with droop powered by PMG...................... 9
5 - AVR SETTINGS................................................................................................................10
6 - TROUBLESHOOTING CHART........................................................................................ 11
7 - MULTIMETER TEST ........................................................................................................12
8 - STATIC TEST PROCEDURE ...........................................................................................13
8.1 - Test equipment ............................................................................................................13
8.2 - Connection ..................................................................................................................13
8.3 - Test procedure.............................................................................................................14
9 - DIMENSIONS...................................................................................................................15
10 - SPARE PARTS ..............................................................................................................16
10.1 - Designation ...............................................................................................................16
10.2 - Technical support service ..........................................................................................16
Disposal and recycling instructions

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
1 - GENERAL DESCRIPTION
The R180 is a fully solid-state automatic
voltage regulator (AVR) which is used for
excitation of a brushless alternator powered
by a Permanent-Magnet (PMG) exciter or
by auxiliary windings.
The alternator voltage between phases V-W
is sampled, processed and converted to a
direct current value. This signal is compared
to the reference value which is internally
generated depending upon the voltage
setting. The comparison is made by a PID
controller, which controls the alternator
excitation. The power circuit uses a pulse
width modulated (PWM) IGBT circuit to
adjust the eld current, which gives a good
dynamic/transient response.
It takes a 1 and 5 A signal from a droop
current transformer in U phase to give a
voltage droop which allows the alternator to
operate in parallel.
The R180 has an accessory input, which
can be used as a remote potentiometer
terminal when connected to a 1 KΩ
potentiometer or takes ± 4.5 VDC in order to
change the terminal voltage.
It has an under frequency voltage roll-off
function to prevent alternator overuxing in
the event of underspeed operation. The
AVR has a potentiometer for setting the
knee-point for under frequency roll-off and
a 50 Hz/60 Hz selection jumper. This jumper
makes it easy to select the AVR frequency
for a 50 Hz/60 Hz alternator.
The AVR output is limited to 6 A. This limiter
is delayed type so that it does not interfere
with eld forcing. In the event of loss of the
sensing input, the AVR provides 9 A DC
excitation current for 5 seconds and
reduces the excitation current.
The R180 is triggered from the alternator
remanent voltage.

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
2 - AVR PARAMETERS
UFRO selection link
Open - 60 Hz operating mode.
Closed - 50 Hz operating mode.
UFRO potentiometer
45 Hz to 55 Hz in 50 Hz mode.
55 Hz to 65 Hz in 60 Hz mode.
Voltage
The working voltage is set by the
potentiometer marked “V”.
Droop
The quadrature droop is set by the
potentiometer marked “Droop”.
Auxiliary input and external potentio-
meter range
The auxiliary input range is set by the
potentiometer marked “Acc”. This
potentiometer sets the maximum voltage
range for the external potentiometer or the
auxiliary input range.
Stability
This potentiometer is used to set the
alternator output voltage stability. Turning it
clockwise increases the speed. The setting
is reached when the stability potentiometer
position (set CW) allow to be at the starting
of a voltage instability, then set the
potentiometer 1 turn below (set CCW).
Indications
- Over Excitation limit
- Loss of sensing voltage
- UFRO
0V

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Installation and maintenance
R180
AVR
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3 - TECHNICAL SPECIFICATION
1 Sensing input 3-ph/2-ph - 220/230/240/380/400/415 volts for
50 Hz
3-ph/2-ph - 208/240/277/380/416/440/480 Volts for
60 Hz
2 Voltage range High 300 V to 530 V
3 Voltage range Low 180 V to 310 V
4 Droop 1 and 5 A AC in U phase
5 Droop range 8% droop at 0.8 PF
6 PMG input power Continuous: 240 V RMS +10%
Momentary 5 s: 240 V RMS + 30
Up to 240 Hz
7 AREP input power Continuous: 250 V peak+10%
Momentary 10 s: 350 V peak +5% - Up to 75 Hz
8 Excitation current 6 A DC continuous
9 A for 5 seconds (short-circuit operation)
9 Regulation ± 1% at AVR sensing terminals
10 Maximum excitation limit 6 A DC (factory setting)
11 Maximum excitation limit
delay
30 sec. (factory setting)
12 Under frequency protection 48.5 Hz/58.5 Hz for 50 Hz/60 Hz operation
13 Slope 1.2X (120%) V/Hz
14 Remote potentiometer 1 kOhm for ± 10% adjustment
15 Accessory Input ± 4.5 VDC for ±15%
16 Loss of sensing Shuts down after 5 sec. when sensing open
17 Weight 500 g approximate
18 Dimensions 140 mm x 115 mm x 70 mm
19 Temperature range -25ºC to +70ºC
20 Storage temperature range -40ºC to +80ºC
21 Thermal drift 0.5% for 20ºC change
22 Fuse FST 10A 250V

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
4 - MAIN FUNCTION OF THE AVR
4.1 - Connection diagram for low voltage range
0V

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
4.2 - Connection diagram for high voltage range with droop powered by AREP
0V

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
4.3 - Connection diagram for high voltage range with droop powered by PMG
0V

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Electric Power Generation 2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
5 - AVR SETTINGS
WARNING! TO PREVENT ELECTRIC
SHOCK AND PERSONAL INJURY, CARE
MUST BE TAKEN NOT TO TOUCH LIVE
PARTS.
CAUTION! ADJUSTMENTS MUST BE
DONE CAREFULLY AND GRADUALLY
WHILE THE ALTERNATOR IS RUNNING
OTHERWISE THE SYSTEM MAY
EXPERIENCE FLUCTUATIONS.
- VOLT : Full CCW
- STAB : Centre of travel
- UFRO : Select 50 Hz or 60 Hz mode
Start-up
- Check all settings are as per the paragraph
“Initial Settings”.
- Start the prime mover and bring the
alternator up to rated speed (rpm).
- The voltage at the terminals will show
voltage build-up.
- Adjust the voltage at the terminals using
the voltage adjustment potentiometer.
- If oscillations are seen on the voltmeter
(A.C.) indicating the alternator terminal
voltage, gradually turn the “STABILITY”
trimmer on the R180 clockwise and stop
turning it at the position where the
oscillations disappear.
- If oscillations are not seen on voltage
build-up, turn the “STABILITY” trimmer
anticlockwise till oscillations appear and
then slightly turn it clockwise to remove
any oscillation. This will help tune the
controller and alternator time constants.
- Set the Ufro knee point at 47.5 Hz for 50 Hz
or 57 Hz for 60 Hz.
- If an external voltage adjustment
potentiometer is required, stop the alternator
and connect a 1 kOhm potentiometer in
place of the link at terminals A1 and A2.
- If droop is required, connect the droop
current transformer at terminals Q1 and Q2.