Nidec LEROY-SOMER R221 Mode d’emploi

E+ E-

110

R221

VOLT

OPEN FOR 60 Hz STAB

POT 1K

R221

AVR

Installation and maintenance

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 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

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

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

performed 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.

Share Capital: 32,239,235 €, RCS Angoulême

338 567 258.

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 authorization.

All brands and models have been registered and

patents applied for.

This manual concerns the alternator AVR which you have just purchased.

We wish to draw your attention to the contents of this maintenance manual.

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 en -

CONTENTS

1 - POWER SUPPLY ...............................................................................................................4

1.1 - SHUNT excitation system ............................................................................................4

2 - R221 AVR ...........................................................................................................................4

2.1 - Characteristics .............................................................................................................4

2.2 - AVR options..................................................................................................................4

3 - INSTALLATION - COMMISSIONING .................................................................................5

3.1 - Electrical checks on the AVR ........................................................................................5

3.2 - Settings........................................................................................................................5

3.3 - Electrical faults.............................................................................................................6

4 - SPARE PARTS...................................................................................................................7

4.1 - Designation..................................................................................................................7

4.2 - Technical support service.............................................................................................7

Disposal and recycling instructions

WARNING

The AVR R221 is dedicated for the alternators LSA40 and LSA423 single phase

(50Hz/60Hz). It is particularly recommended for applications in which the alternator’s

voltage di󰀨erence between no-load operation and load operation is out of ISO8528-3

class G2.

The R221 is an IP00 product. It must be installed inside a unit so that this unit’s cover can

provide IP20 minimum total protection (it must only be installed on our alternators in the

appropriate location so that when viewed externally, it has a higher degree of protection than

IP20).

2024.02 / h

Electric Power Generation

124 mm

85 mm

T1 T2 T3

T4 T5 T6

5+ 6-

T7 T8 T9

T10 T11 T12

E+ E-

110

R221

ST3

VOLT

OPEN FOR 60 Hz STAB

POT 1K

ST4

50 Hz 60 Hz

Installation and maintenance

R221

AVR

5035 en -

1 - POWER SUPPLY

1.1 - SHUNT excitation system

The alternator with Shunt excitation is self-

excited with an R221 voltage regulator.

The regulator monitors the exciter excitation

current as a function of the alternator output

voltage. Very simple in design, the alternator

with shunt excitation has no sustaining

short-circuit capacity.

2 - R221 AVR

2.1 - Characteristics

- Storage: -55°C ; +85°C

- Operation: -40°C ; +65°C

- Voltage regulation: ± 0.5%

- Voltage supply/sensing range 85 to 139 V

(50/60 Hz)

- Rapid response time (500 ms) for a

transient voltage variation amplitude of ±

20%

- Voltage setting P1

- Stability setting P2

- Power supply protected by 8 A fuse, slow-

blow action (tolerates 10 A for 10 s)

The fuse is impregnated in the resin,

therefore it can not be replaced.

- Frequency: 50 Hz with ST3 jumper - 60 Hz

without ST3 jumper.

- The size of the screwdriver tip used to

adjust the potentiometer is 2.5 mm.

2.2 - AVR options

Potentiometer for remote voltage

adjustment, 1000 Ω / 0.5 W min: adjustment

range ± 5%.

- Remove the ST4 jumper.

For wiring up the external potentiometer;

the “earth” wires must be isolated as

well as the potentiometer terminals

(wires at the same voltage as the power).

SHUNT SYSTEM

MAIN FIELD STATOR : 12 wires (marked T1 to T12)

Armature

Field

Voltage

Option

Stability

Frequency

Potentiometer for remote

voltage adjustment

Varistor

2 x holes Ø 5.8 x 109 mm

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 en -

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 ST3 frequency selection

jumper is on the correct frequency setting.

- Check whether the ST4 jumper or the

remote adjustment potentiometer have

been connected.

3.2 - Settings

The machine is tested and set at the

factory. When rst used with no load,

make sure that the drive speed is correct

and stable (see the nameplate). After

operational testing, replace all access

panels or covers.

The only possible adjustments to the

machine should be made on the AVR.

3.2.1 - R 221 setting (SHUNT system)

Initial potentiometer settings

- P1 potentiometer (AVR voltage

adjustment): fully anti-clockwise.

- Remote voltage adjustment potentiometer:

centre position.

Run the alternator at its rated speed. If the

voltage does not increase, the magnetic

circuit should be remagnetized (see section

3.3).

- Turn the AVR voltage adjustment

potentiometer P1 slowly until the output

voltage rated value is obtained.

- Adjust the stability setting using P2.

Clockwise: increase the rapidity.

Anti-clockwise: decrease the rapidity.

3.2.2 - Special type of use

Excitation circuit E+, E- must not be left

open when the machine is running : AVR

damage will occur.

3.2.2.1 - R221 eld weakening (SHUNT)

The exciter is switched o󰀨 by disconnecting

the AVR power supply.

Contact rating : 16A - 250V AC.

The power supply contactor must only be

closed when the alternator is not being

driven.

3.2.2.2 - R221 eld forcing

Battery must be isolated from the earth.

Exciter eld may be at line potential.

WARNING

E+ E-

110

VOLT POT 1K

Battery (B Volt)

(400V - 10A) Diode

E+ E-

110

Exciter field

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 en -

3.3 - Electrical faults

Fault Action E󰀨ect 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 builds up and its

voltage is still correct when the

battery is removed

- Lack of residual magnetism

The alternator builds up but its

voltage does not reach the rated

value when the battery is

removed

- Check the connection of the voltage

reference to the AVR

- Faulty diodes

- Armature short-circuit

The alternator builds up but its

voltage disappears when the

battery is removed

- Faulty AVR

- Field windings open circuit (check

winding)

- Revolving eld coil open circuit (check the

resistance)

Voltage too

low Check the drive speed

Correct speed

Check the AVR connections (AVR may be

faulty)

- Field windings short-circuited

- Rotating diodes burnt out

- Revolving eld coil short-circuited (check

the resistance)

Speed too low

Increase the drive speed (do not touch the

AVR voltage setting before running at the

correct speed)

Voltage too

high

Adjust AVR voltage

potentiometer Adjustment ine󰀨ective - Faulty AVR

- 1 faulty diode

Voltage

oscillations

Adjust AVR stability

potentiometer

- Check the speed : possibility of cyclic

irregularity

- Loose connections

- Faulty AVR

- Speed too low when on load (or U/F bend

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 AVR

- Check the speed (or U/F bend set too

high)

- Faulty rotating diodes

- Short-circuit in the revolving eld coil

(check the resistance)

- Faulty exciter armature (check the

resistance)

(*) Caution : For single-phase operation, check that the sensing wires coming from the AVR are correctly connected to

the operating terminals.

Voltage

disappears

during

operation

Check the AVR, 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 exciter armature

- Faulty AVR

- Revolving eld coil open circuit or

short-circuited

Warning: after operational testing, replace all access panels or covers.

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 en -

4 - SPARE PARTS

4.1 - Designation

Description Type Code

AVR R221 AEM 110 RE 042

4.2 - Technical support service

Our technical support service will be

pleased to provide any additional

information you may require.

For all spare parts orders or technical

support requests, send your request to

service.epg@leroy-somer.com or your

nearest contact, whom you will nd at

www.lrsm.co/support indicating the type

and the code number of the AVR.

To ensure that our products operate correctly

and safely, we recommend the use of

original manufacturer spare parts.

In the event of failure to comply with this

advice, the manufacturer cannot be held

responsible for any damage.

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 en -

Disposal and recycling instructions

We are committed to limiting the

environmental impact of our activity. We

continuously monitor our production

processes, material sourcing and product

design to improve recyclability and minimise

our environmental footprint.

These instructions are for information

purposes only. It is the user’s responsibility

to comply with local legislation regarding

product disposal and recycling.

Waste & hazardous materials

The following components and materials

require special treatment and must be

separated from the alternator before the

recycling process:

- electronic materials found in the terminal

box, including the automatic voltage

regulator (198), current transformers (176),

interference suppression module and other

semi-conductors.

- diode bridge (343) and surge suppressor

(347), found on the alternator rotor.

- major plastic components, such as the

terminal box structure on some products.

These components are usually marked with

information concerning the type of plastic.

All materials listed above need special

treatment to separate waste from

reclaimable materials and should be

entrusted to specialist recycling companies.

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 en -

2024.02 / h

Electric Power Generation Installation and maintenance

R221

AVR

5035 en -

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