A buyer searching for AC Alternator is usually trying to stop a bad substitute. A generator is specified by the load in kilowatts, the voltage, the duty, and the noise and emissions of the site. The notes below are selection criteria for an AC Alternator. They are not a catalog promise. Confirm every rating on the current datasheet, drawing, or test report for the revision you will receive.
What has to be true of AC Alternator
A generator is specified by the load in kilowatts, the voltage, the duty, and the noise and emissions of the site. For an AC Alternator, start from the duty, then the interface to the rest of the machine or the room, then the document that proves the claim. A lower price that leaves one of those blank is a different product.
AC Alternator is easy to confuse with Diesel Engine Generator. If the quote could be read as either, add the line that separates them: the rating, the fitment, or the standard named below. Link the drawing number to that line so receiving inspection can reject the wrong one.
Numbers that change the quote
| Line | What to write for AC Alternator |
|---|---|
| Transfer | Manual or automatic transfer, as a separate device if it is. |
| Load | Running kilowatts and the motor-starting peak. |
| Electrical | Voltage, phases, frequency, and whether it is standby or prime. |
| Fuel | Diesel, gas, or another fuel the site can store legally. |
| Enclosure | Open or canopy, and the noise limit. |
| Runtime | Tank or the fuel supply for the hours you need. |
How to compare two offers
Lay both quotes for AC Alternator on one sheet and line up transfer, load, and electrical. If a cell is empty, the offer is not finished. Ask for the missing line in writing. When those match, the honest difference is lead time, the test evidence, and who carries the warranty. Do not average a fully specified AC Alternator with a cheaper line that omitted transfer.
Documents worth having before the deposit
Ask for the rating definition: standby and prime are not the same kilowatts. The file should name AC Alternator and the revision, not only the supplier’s homepage. A factory quality certificate such as ISO 9001 can sit beside that file. It does not replace it.
Failures that show up after delivery
- Treating standby rating as continuous.
- Forgetting the noise limit and the fuel storage rule.
- Sizing to the running load and ignoring motor start.
On an AC Alternator, the expensive version of the first mistake is discovering it after the goods are in the crate. Put the rejection condition in the purchase order while the supplier can still restate the offer.
A worked RFQ line
Use this shape, then replace the brackets with your duty: “AC Alternator — Write kilowatts, standby or prime, voltage, fuel, and noise.” That sentence is a template, not a rating of any brand. If a supplier’s datasheet uses different units, convert them onto this sheet so the next offer can be compared.
Where words like waterproof / IP65 belong
Searches often add a constraint to AC Alternator: waterproof / IP65, or IP67. Keep those on this page. IP65 in IEC 60529 means dust-tight and protected against water jets. Write that code if hoses are the real exposure. The word waterproof alone does not name a test. IP67 is dust-tight plus a defined temporary immersion. It is not a rating for living underwater, and it says nothing about sunlight or salt. If you need a third constraint, add it as another line on the same drawing. A second URL that only swaps the adjective does not give a buyer a second fact.
Related in this section: how to specify Diesel Engine Generator.
Questions buyers actually ask
What should an RFQ for AC Alternator include?
Write kilowatts, standby or prime, voltage, fuel, and noise.
Is a cheaper AC Alternator the same part?
Only if transfer, load, and the documents match. A missing line is a different offer.
Do waterproof, OEM, or IP words need their own page?
No. For AC Alternator they are extra lines on this specification. Ask for the test or the drawing that gives the word a value.