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R120 Automatic Voltage Regulator AVR fits for Leroy Somer Generator Brushless Diesel Generator

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R120 Automatic Voltage Regulator AVR fits for Leroy Somer Generator Brushless Diesel Generator  DESCRIPTION: Type: AVR Part Number:R120 Condition: new,replacement Manufacturer Warranty: 1 Year Ap...
R120 Automatic Voltage Regulator AVR fits for Leroy Somer Generator Brushless Diesel Generator 

Type: AVR
Part Number:R120
Condition: new,replacement
Manufacturer Warranty: 1 Year
The R120 is used on the following Leroy Somer Alternators:
TAL040 B, TAL040 C, TAL040 C1, TAL040 D, TAL040 E, TAL040 F
TAL042 A, TAL042 B, TAL042 C, TAL042 D, TAL042 E, TAL042 F, TAL042 G, TAL042 H
TAL044 A, TAL044 B, TAL044 C, TAL044 D, TAL044 D1, TAL044 E, TAL044 H, TAL044 J, TAL044 K

Leroy Somer Voltage Regulator AEM230RE005
Leroy Somer Voltage Regulator 4969966

Sensing input:
- Voltage: 277 VAC ± 10% for 1-phase,
415 VAC line-to-line ± 10% for 3-phase,
2-line sensing. The AVR senses the true
average of the line-to-line waveform. Use
the resistor (SMD) network for trouble-free
sensing and control of sensed voltage/ regulation.
Input power:
- Voltage: 277 VAC rms ± 10%
- Frequency: 50/60 Hz
Output power:
- Voltage: 95 VDC for 240 VAC Input
- Current:
4 A DC
6 A for 30 sec. (when allowed by the field resistance)
Operating temperature: -20ºC to +70ºC
Storage temperature: -40ºC to +80ºC
Voltage setting: min ± 10% of rated voltage.
Stability setting: can be adjusted to obtain
a correct transient response in steady state.
Under frequency roll-off setting: available
below 46 Hz for 50 Hz and below 56 Hz for 60 Hz.
Voltage build-up: 2 Volts (L-N)
Voltage regulation: ± 1% at the AVR
terminals with a THC <5%.
Thermal drift: ± 1% for 30ºC change in temperature.
Response time: less than 50 ms.
Closed loop response: typically 0.5 sec to recover 98% of the defined voltage for a field forcing ratio of 1:2.
Sensing loss protection: the voltage
should disappear when the sensing circuit is open.
Overexcitation protection: 10 VDC to 85 VDC.
Set point: 60 VDC
Protection fuse: 4 A, 240 VAC.
Potentiometer sealing: except for the
V-trim potentiometer, all potentiometers are sealed.
Frequency roll-off indicator: LED provided (UF).
Sensing loss indicator: LED provided (SL).
Overexcitation indicator: LED provided (OE).
Protection on the devices: suitable R-C
snubber to be provided for the device used
to protect against voltage surges.
Potting/Encapsulation details: the
components on the AVR should be
completely encapsulated with suitable PU
resin compound to absorb transients/
vibrations during operation.
Alternator excitation details: (typical)
- Full load:
Excitation voltage: 40 to 50 V
Excitation current: 2.5 to 4.0 A


1. Please make sure it will fit your machine before purchasing it. If you are not 100% sure this is what you need, please find out your engine model, series number and contact our Customer-service.
2. Please double check the part number of your item, matching information is for reference only.If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!
3. Communication is the best way to solve the problem. If you have any problems after you receive the package, please contact us in time, before opening a return or case.
4.For more information please contact us info@diselmart.com. We will reply you in 24 hours.

Returns Policy

Wе аdорt a 30 dауѕ rеturn роlісу whісh mеаnѕ thаt аll рrоduсtѕ рurсhаѕеd оn оur wеbѕіtе mау bе rеturnеd tо uѕ wіthіn thе tіmе-frаmе. Yоu nееd tо соntасt uѕ wіthіn 30 dауѕ аftеr thе рrоduсt(ѕ) саmе іntо уоur роѕѕеѕѕіоn аnd thе рrоduсt(ѕ) muѕt bе rеturnеd tо uѕ wіthоut аnу unduе dеlауѕ. Rеturnеd рrоduсtѕ muѕt bе rеturnеd іn thе ѕаmе соndіtіоn аѕ thеу wеrе ѕеnt аnd thеу muѕt bе ѕеnt іn іtѕ оrіgіnаl расkаgіng. Returned іtеmѕ оvеr 30 days аrе ѕubjесt to a restocking fее.

Applicable circumstances for return and exchange:

Merchandise eligible for return or exchange must be:

– New, unused and in original condition;

–The problem of replacing the product is not man-made damage;

– Inclusive of all original hangtags, packaging, and components at the time of return or exchange.

– Accompanied by a proof of purchase (order confirmation email or number).

The return process

(1) You must first contact us providing us with the order number and reason for the return/exchange with our contact form. we will process the return application within 48 hours and reply to the processing result

(2) After the customer receives the response of the processing result, send it back and tell us the tracking number

(3) (if exchange): After receives return goods, we will re-ship and update the tracking number

Refund process

(1) After the website receives the returned product, it will take 3 days to process it. If there is no problem with the returned product, the refund will be received within 3 days

(2) What to do if the refund is not received:

If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted.

There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us here

Feel frее tо contact uѕ rаthеr thаn ореn any case іf уоu have any рrоblеm, wе'll try оur bеѕt tо provide уоu thе bеѕt service.

After-sales contact information

Email: info@dieselmart.com

Whatsapp: +86 15157377230


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.Shipping address Please provide us with correct detailed shipping Address including postcode, and correct phone number that the carrier can contact you for delivery.

Handing Time

We ship within 3 business days upon receipt of payment average.

Delivery Time:

Standard shipping(USPS, FAR Internation, E Packet): To USA 7-14 Workdays, To other countries 10-20 Workdays.

Expedited Shipping (FedEx/DHL/UPS): To USA 2-6 Workdays, To other countries 3-8 Workdays.

This is normal condition, but sometimes international delivery is highly depended on the courier company and local customs/duties. Freight (Shipping Charges) The freight is calculated by weight and country. Different products and address will be of different freight. Please check directly at check-out page.


Import duties, tax and charges are not included in the price listed or freight. These charges are buyer's responsibility.

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