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Findmall AVR EA05A Automatic Voltage Regulator Controller-avr EA05A

Findmall AVR EA05A Automatic Voltage Regulator Controller-avr EA05A

Regular price $35.00
Regular price $0.00 Sale price $35.00
Sale Sold out

Sensing Inpuuut
Voltage 220 / 380 / 440 VAC, 1 phase2 wire
DIP switch selectable
Frequency 50 / 60 Hz, DIP switch selectable
Power Input
Voltage 100 ~ 300 VAC, 1 phase 2 wire
Voltage Max. 90 VDC @ 240 VAC input
Current Continuous 5A
Intermittent 7A for 10 sec
Resistance Min. 15 ohm Max. 100 ohm
Voltage Regulation
< ± 0.5% ( with 4% engine governing )
Voltage Build-up
Residual voltage at AVR terminal > 5 VAC
Thermal Drift
0.03% per °C change in AVR ambient
External Volts Adjustmen
± 7% with 1K ohm 1 watt trimmer
EMI Suppression
Internal electromagnetic interference filtering
Unit Power Dissipation
Max. 8 watt
Under Frequency Protection (Factory Setting)
60 Hz system presets knee point at 55 Hz
50 Hz system presets knee point at 45 Hz
Soft Start Ramp Time
3 sec.
101mm L * 69mm W * 47.5mm H
183g ± 2%
When generator supply is over load, N phase will be different with the sharing load by 3 phases (load imbalance). Hence, the voltage from N phase to 3 phases (R.S.T.) will be altered. When the rated voltage of the traditional single input’s AVR is above 220V, it will increase the voltage drift rate by using N phase as the detective input. It will also cause the voltage imbalance.
EA05A can improve the above situation, and increase the generator’s rated voltage usage space,such as 380V, 440V. We can all detect by the “phase voltage”.
1. When the rated phase voltage of the generator is 220VAC, the input terminals B, C and sensing terminals A, C can join together (as show as figure3. It’s the original setting).or connect independent.(as show as figure2).
2. When the rated phase voltage of the generator is 380V, 440V, the input terminals B, C and sensing terminals A, C must separate connect the wiring (as show as Figure 4 or figure 5). The voltage between B and C must not be over 300 VAC.
3. F+ F- terminals connect to the generator field. (J and K) FEXT.VR is the potentiometer (1KΩ 1W). These two terminals must be by-pass when external potentiometer is needless.
P.S. : A, B, C, F+ F- the usage of wire gauge are AWG16 or 1.25 mm2 85。
C above 600V.
The EXT.VR connection wires must be made of isolated wiring.
The voltage setting for 220V/380V/440V and the
frequency setting for 50/60HZ is show in figure7.
Please check the voltage/frequency selector setting
is correct before start the generator.



1. Before you turn on the generator, please turn the
voltage adjustment and stability adjustment full anti-clockwise. After the generator is on and run stably, turn the voltage adjustment clockwise to reach the required out voltage. (If there is an external potentiometer, turn the external potentiometer to the middle position before adjust internal voltage potentiometer.)
2. Adjust “Stability Adjustment” clockwise slowly to
change the feedback time between AVR and the generator. If the adjustment is too big, it might cause the voltage instable. If too small, the load voltage will change too much at heavy load. Our suggestion is to trace by the multi-meter DCV. To adjust “stability adjustment”, you
just need to make the multi-meter waving smaller. It can also improve the full load’s voltage drift rate.
When the regulator is operated with the generator for
the first time, the polarity of residual magnetism may be reversed or too small to achieve the necessary build-up voltage for the regulator. If reversing the field connections does not induce build-up, and the residual voltage is less than the specified value of 5 Vac, shut down the Prime-mover and proceed with the following steps :
1. With the Prime-mover at rest and the regulator’s
field output wires disconnected, apply a DC source ( NOT grounded ) of not more than 3~12 Vdc with Positive to F+ and Negative to F-, in series with a current-limiting resistor of 3~5 ohms 20 watt. (The set battery is a suitable source.)
2. Allow approximately 3 seconds before removing
the DC source.
3. With the voltage regulator disconnected ( wires 3 and 4 ), start the prime mover and measure the “ residual ” voltage available at the auxiliary winding. If this voltage is greater than 5 Vac, reconnect voltage regulator, and voltage build-up should be successful. If less than 5 Vac is measured, repeat field flashing procedure.
4. If repeating steps a. and b. does not result in
generator voltage build-up, and residual is greater than 5 Vac, replace voltage regulator.


Package Including:
1 x Automatic Voltage Regulator Controller AVR EA05A Genset Parts
1 x product Instructions

Free Shipping To The USA

Free shipping on all orders

1 Year Warranty

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30 days worry-free return.

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1. Shipping Methods

To ensure faster and safer delivery, we choose FedEx, USPS, UPS, DHL Ground/Air service. We will randomly select the shipping method.

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All products are shipped free of charge, whether or not.

3. Shipping Time

Most in-stock products and orders will be shipped the same day or within 1 business day, and the carrier to which the product is shipped will be randomly selected based on the destination. Once the product has been shipped, it will take 3-5 business days for any shipping method to arrive.

In addition, except for weekends, there will be some delay in product shipment due to covid-19. After that, you can track the shipment details by using the tracking number we emailed to you. For customized or made-to-order products, shipping time may vary as they may require fabrication, painting, embroidery or assembly.


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Warranty Coverage Policy

We offer a one-year limited warranty for defective products from the date the product is received by the original purchaser or installer, unless otherwise specified at the time of purchase.

General Warranty Limitations (Applies to all Product Warranties)

For each of our product warranties offered above, the following provisions apply:

  • The warranty is limited only to the original purchaser and is non-transferable.
  • Under NO circumstances will our liability exceed the amount of the original sale.
  • Each warranty does not cover any labor costs or incidental, indirect, special or consequential damages such as, but not limited to, physical injuries or property damage, loss of time, loss of use of the vehicle, inconvenience, air freight charges, rental vehicle charges, towing charges or accommodations resulting from a defect in or failure of the part.
  • A prepaid shipping label will be issued for all returns due to warranty claim.
  • The warranty does not cover lost or stolen packages. Because the customer is the shipper, he/she is the only one who can file any lost claim with the shipping company. Therefore, the claim must be coordinated and processed through the shipping company by the customer.

Each warranty represents the exclusive remedy for any product defect or failure and our total liability for any part we warrant. We make no other warranties, express or implied, including any warranties of merchantability, condition of any kind or fitness for a particular purpose. Some states do not allow disclaimers of implied warranties. Therefore all implied warranties that may apply to your part are limited to the duration of this written warranty. Some states also do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental, special, or consequential damages, so the above information may not apply to you. Each warranty gives you specific rights, and you may have other rights which vary from state to state. We do not authorize any person to vary the terms, conditions, or exclusions of any warranty. If any provision of a warranty should become invalid or unenforceable because of any laws, the remaining terms and provisions of the warranty shall remain in full force and effect. To the extent allowed under local law, the remedies provided in the Warranty Coverage Policy are the customer’s sole and exclusive remedies.

Return Policy

1.Refunds Policy

1.1 We offer customers the option to request a refund or exchange up to 30 days after receiving your Product(s). If you are a consumer, you have certain legal rights if you purchase Products which then turn out to be faulty. 

1.2 If 30 days have gone by since the product was delivered to you, unfortunately, we can’t offer you a refund or exchange.


2.1 Please note that we are not able to offer refunds or exchanges for bespoke products made to your specification, for example chains, flexes cut to order and flex sample boxes.

2.2 If you are not satisfied with your product and wish to return it, we cover the return shipping costs. You must notify us via email at and send the items back within 30 days of receiving the Product(s) and return the item in its original packaging together with proof of purchase.

 To return the items simply follow the simple steps below:

1. Send an email to and describe the problem you are having and add a picture of it.

2. After receiving your email, we will deal with your problem within 72 hours.

3. Once the return request has been approved, a return label will be sent to the customer with the return address.

4. We will refund you and send you a notification to your email address after we receive the package and check if the product is in new condition.. 

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2.3.1 inspect them to check that they are in their original packaging and are suitable for resale. Should the Products fail the inspection they will remain your property and you will be responsible for their collection.

2.3.2 refund you the price you paid for the Products. However, please note we are permitted by law to reduce your refund to reflect any reduction in the value of the goods, if this has been caused by your handling them in a way which would not be permitted in a shop. If we refund you the price paid before we are able to inspect the goods and later discover you have handled them in an unacceptable way, you must pay us an appropriate amount.

2.3.3 make any refunds due to you as soon as possible and in any event within 30 days after the day on which we receive the Product back from you, or after you inform us of your decision to cancel the Contract.

2.4 We recommend that you ensure the Product(s) during transit and put into another box or wrap well to protect the original packaging.

3. Exchanges

3.1 If your product is damaged or faulty and you wish to exchange it, you will need to send us evidence of the damaged product and notify us within 30 days of receiving the item. Please. Just send us an email at and we will proceed with the exchange as soon as possible. 

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We offer free return service, so please don't hesitate to contact us if you encounter any problems 

3.3 If it is impractical to offer a replacement product for any item that is damaged or faulty, we reserve the right to offer a repair, an allowance for a repair, or alternatively a refund for your purchase.

3.4 All shipping costs for product exchanges will be borne by the seller.


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The warany period of he roduct s one vear,if there is any problem wit the product within one year, you can retum it directy va contact us to discuss an exchanoe

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