ALTERNATOR PARTS

AVR

AVR stands for Automatic voltage regulator, it’s an important electronic part for alternators, and normally we have models such as:

SX460, AS440, AS480, and MX321, MX341 for Stamford, and R220, R250, R438, R448, R490, R450 for Leroy Somer.

Leroy somer avr R230

Power input & sensing

Voltage: 85-140V AC

Frequency:50-60Hz.

Output

Voltage: 90V DC at 110V AC.

Current: 10 A DC. Forcing 15 A DC for 15 seconds

Regulation: +/- 1 %
Features

Under frequency protection.

Remote pot. Facility to adjust voltage.

Jumper link for 50 / 60 Hz.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable operation.

Leroy somer avr R250

Power input & sensing
Voltage: 85-140V AC

Frequency:50-60Hz.
Output
Voltage: 90V DC at 110V AC.

Current: 10 A DC. Forcing 15 A DC for 15 seconds
Regulation:+/- 0.5 %
Features

Multifunction selector switch to set 50/60 Hz, Under frequency and engine

relief adjustments.

Remote pot. Facility to adjust voltage.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable operation.

Leroy somer avr R438

Power input
Voltage: 35 - 150V AC

Frequency: 40-400Hz.
Sensing input

Voltage: 110-220-415 V AC

Frequency:50/60 Hz.
Output

Voltage: 90V DC at 110V AC.

Current: 10 A DC. Forcing 15 A DC for 15
seconds Regulation: +/- 0.5 %
Features

Power input can be from PMG, isolated Auxiliary

and/or booster input. DROOP C. T. Input for

parallel operation. Remote pot. Facility to adjust

voltage.

DC biasing to interface PLC / Engine controller.

Under frequency protection with LED indicator.

Under frequency protection with LED indicator.

Over Excitation protection with LED indicator.

Jumper link to adjust parameters like 50 / 60 Hz, engine relief

parameters and 3 phase sensing module interface.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable operation.

Leroy somer AVR R448

Power input
Voltage: 35-150V AC

Frequency:40-400Hz.
Sensing input

Voltage: 110-220-415 V AC

Frequency:50/60 Hz.
Output
Voltage: 90V DC at 110V AC.

Current: 10 A DC. Forcing 15 A DC for 15 seconds

Regulation:+/- 0.5 %
Fratures
Power input can be from PMG, isolated Auxiliary and/

or booster input. DROOP C. T. Input for parallel operation.

Remote pot. Facility to adjust voltage.

DC biasing to interface PLC / Engine controller.

Under frequency protection with LED indicator.

Over Excitation protection with LED indicator.

Jumper link to adjust parameters like 50 / 60 Hz, engine relief

parameters and 3 phase sensing module interface.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable operation.

Leroy somer avr R449

Power input

Voltage: 35-150V AC

Frequency:40-400Hz.
Sensing input

Voltage: 110-220-415 V AC

Frequency:50/60 Hz.
Output

Voltage: 90V DC at 110V AC.

Current: 10 A DC. Forcing 15 A DC for 15 seconds

Regulation:+/- 0.5 %
Fratures

Power input can be from PMG, isolated Auxiliary and/or booster input.

DROOP C. T. Input for parallel operation.

Remote pot. Facility to adjust voltage.

DC biasing to interface PLC / Engine controller.

Under frequency protection with LED indicator.

Over Excitation protection with LED indicator.

Jumper link to adjust parameters like 50 / 60 Hz, engine relief

parameters and 3 phase sensing module interface.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable operation.

Leroy somer avr R450

Power input(PMG)

Voltage: 40-50VAC, 3 phase

Current: 3A/phase
Sensing and power input

Voltage: terminal 0-110V=95-140V terminal

0-0-220V =170-260V termin

0-380V=340-520V

Frequency:50-60Hz nominal
Output

Voltage: max 160VDC at 120VAC input

Current: max 10A

Resistance:15 ohms min

Regulation:+/- 5% RMS with 4% engine
governing

Stamford avr MX321

Power input(PMG)

Voltage: 170-220V ac max, 3 phase,

3 wire. Current: 3A/phase

Frequency: 100-120Hz nominal
Sensing and power input

Voltage: Jumper selectable 95-132V AC or

190-265V AC

Frequency: 50-60Hz nominal
Output

Voltage: max 120V dc

Current: continuous 3.7 A

Intermittent 6A for 10secs.

Resistance: 15 ohms min

Regulation:+/- 5% RMS with 4% engine
governing

Leroy somer AVR R120

Power input & sensing

Voltage: 277-415 AC

Frequency:50-60Hz.
Output

Voltage: 90V DC at 240V AC.

Current:•4 Amps DC Continuous

•6 Amps for 30sec. (whe

allowed by field resistance)

Regulation: +/- 1 %
Features

Frequency roll off indicator: LEDprovided (UF).

Sense Loss indicator: LED provided(SL).

Over excitation indicator: LED provided(OE).

Protection on the devices: Suitable R-C Snubber

to be provided for the device used to protect this

from surge. Potting/ Encapsulation Details: the

components on the AVR should be completely

encapsulated with suitable PU resin compound to

absorb transients /vibrations while in operation.

Sealing of Potentiometers: except V –trim pot all

pots are sealed.

Leroy somer avr R150

Power input & sensing

Voltage: 240-415 AC

Frequency:50-60Hz.
Output

Voltage: 105 DC at 240V AC

Current:• 6 Amps DC Continuous

• 8 Amps for 30sec. (whe

allowed by field resistance)

Regulation: +/- 1 %
Features

Over excitation protection: 10V DC to 85V DC. Set point : 60 V DC

Fuse for protection: 6 Amps, 240 Volts AC.

All potentiometers: multi-turn except

Droop pot (Droop-single turn)

Sealing of Potentiometers: except V –

trim pot all pots are sealed.Frequency roll off indicator: LED

provided (UF).Sense Loss indicator: LED provided(SL).Over excitation

indicator: LED provided(OE). Protection on the devices: Suitable R-C

Snubber to be provided for the device used to protect this from surge.

Leroy somer avr D350

Rated excitation current: 5 A

• Maximum excitation current

10 A for 10 s

• Voltage regulation accuracy

-/+ 0.25%

• Excitation: SHUNT, AREP or PM

• Voltage sensing: three-phase o

single-phase - 530 VAC max.

• CT input: yes (1 A and 5 A

• Mate N Lok connector

• Rated excitation current: 5

• Maximum excitation current

10 A for 10 s

• Voltage regulation accuracy

-/+ 0.25%

• Excitation: SHUNT, AREP or PM

• Voltage sensing: three-phase o

single-phase - 530 VAC max.

• CT input: yes (1 A and 5 A

• Mate N Lok connector

Leroy somer avr D550

Rated excitation current: 5 A

• Maximum excitation current

10 A for 10 s

• Voltage regulation accuracy

-/+ 0.25%

• Excitation: SHUNT, AREP or PM

• Voltage sensing: three-phase o

single-phase - 530 VAC max.

• CT input: yes (1 A and 5 A

• Mate N Lok connector

• Rated excitation current: 5

• Maximum excitation current

10 A for 10 s

• Voltage regulation accuracy

-/+ 0.25%

• Excitation: SHUNT, AREP or PM

• Voltage sensing: three-phase o

single-phase - 530 VAC max.

• CT input: yes (1 A and 5 A

• Mate N Lok connector

Stamford avr MX341

Power input (PMG)
Voltage: 140-220V ac max, 3 phase, 3 wire.

Current: 3A/phase

Frequency: 100-120Hz nominal
Sensing and power input
Voltage: 190-264 V ac max, 1 phase, 2 wire.

Frequency: 50-60Hz nominal
Output
Voltage: max 120V dc

Current: continuous 2.7 A

Intermittent 6A for 10secs.

Resistance: 15 ohms min
Regulation: +/- 1% RMS with 4% engine governing.

Stamford avr AS440

Sensing and power input

Voltage: Jumper selectable 95-132V AC or

190-265V AC

Frequency: 50-60Hz nominal
Output

Voltage: 90V DC at 200V AC.

Current: 4 A DC. Forcing 8 A DC for 15 seconds

Resistance: 15 ohms min
Regulation: +/- 1 %
Features

DROOP C. T. Input for parallel operation.

Remote pot. Facility to adjust voltage.

DC biasing to interface PLC / Engine controller.

Under frequency protection with LED indicator.

Over Excitation protection with LED indicator.

Jumper link for 50 / 60 Hz.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable

operation.

Stamford avr SX460

Sensing and power input

Voltage: Jumper selectable 95-132V

AC or 190-265V AC

Frequency: 50-60Hz nominal
Output

Voltage: 90V DC at 200V AC.

Current: 4 A DC. Forcing 8 A DC for 15 seconds

Resistance: 15 ohms min
Regulation: +/- 1 %
Features

Under frequency protection with LED indicator.

Over Excitation protection with LED indicator.

Jumper link for 50 / 60 Hz.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable operation.

Stamford avr SX460

Sensing and power input

Voltage: Jumper selectable 95-132V

AC or 190-265V AC

Frequency: 50-60Hz nominal
Output

Voltage: 90V DC at 200V AC.

Current: 4 A DC. Forcing 8 A DC for 15 seconds

Resistance: 15 ohms min
Regulation: +/- 1 %
Features

Under frequency protection with LED indicator.

Over Excitation protection with LED indicator.

Jumper link for 50 / 60 Hz.

Fuse protection.

Surge voltage protection at input and output.

High PIV Power devices used for reliable operation.

Stamford avr AS480

Sensing and power input

Voltage: 100-264 V ac 1 phase

Frequency: 50-60Hz nominal
Output
Voltage: 82V d.c. @ 200V a.c power input

Voltage: 45 V d.c. @ 110 Va.c power input

Current: continuous 5A

Transient 7.5A for 10secs.
Regulation: +/- 1 %
Features

De-rate by 20% in mounted external to generator.

Inclusive of 4% engine governing.

After 2minutes warm-up.

Factory set, semi-sealed, jumper selectable.

De-rate output current by 5% pre deg. C above 60C.

Non-condensing