What buyers should know first
An automatic mains failure panel can make a standby generator useful during a power outage, but only when the control scope is described clearly. Export buyers should not assume that every generator quotation includes the same sensing, switching, alarm, and commissioning responsibilities.
For Yangzhou Tesla Power Equipment Co., Ltd., the useful RFQ usually starts with load size, duty rating, site conditions, voltage and frequency, enclosure style, control requirements, and the documents the purchaser needs for project approval.
In practice
The RFQ should say whether the project needs generator start control only, full load transfer, or coordination with a separate ATS or switchboard. It should also name the voltage, phase, frequency, control voltage, alarm outputs, and documents needed for consultant approval.
| AMF detail | What to confirm | Why it matters |
|---|---|---|
| Mains sensing | Voltage, phase loss, and delay settings | Prevents nuisance starts or late starting |
| Start signal | Dry contact, controller logic, or switchboard interface | Defines who owns control wiring |
| Alarm outputs | Common alarm, failed start, low battery, charger fault | Supports facility monitoring |
| Documents | Wiring diagram and control sequence | Helps the site team test before handover |
Specification points to confirm
- State whether the AMF function is inside the generator controller, an ATS panel, or a separate switchboard.
- Confirm project voltage, phase, frequency, neutral arrangement, and control voltage.
- Ask for a control sequence before approving panel drawings.
- Define which alarms must be displayed locally and which signals must be sent remotely.
- Check who will test mains failure, generator start, load transfer, and return-to-mains operation.
Common mistakes to avoid
- Using AMF, ATS, and generator controller as interchangeable terms.
- Leaving dry contact ownership unclear between the generator supplier and switchboard supplier.
- Approving a panel without checking the destination voltage and frequency.
- Skipping simulated mains failure testing during commissioning.
Before requesting a quotation
Ask the supplier to separate the generator set scope from the site installation scope. The generator quotation can normally define the set, enclosure or frame, control panel, breaker, radiator arrangement, silencer, batteries, drawings, and test documents. Civil works, fuel piping, exhaust duct routing, cables, and local approval items should be checked with the site contractor unless they are explicitly included.
- Single-line diagram or description of the incoming mains and generator connection.
- Required standby or prime duty rating and load transfer expectation.
- Control voltage, alarm list, communication requirement, and site monitoring interface.
- Preferred panel location and cable entry direction.
- Required drawings, controller manual, test records, and handover documents.
Related products and technical notes
Related generator examples can be reviewed on <a href="https://www.tesladieselgeneratorset.com/products/factory-direct-sale-customized-500kw-630kva-for-cummins-ktaa19-g6a-diesel-generator-ats-auto-start-50-60hz-frequency-230v-240v-r/">this diesel generator product page</a>. Purchasers comparing project requirements can also read <a href="https://www.tesladieselgeneratorset.com/diesel-generator-control-panel-checks-remote-monitoring-projects/">control panel checks for remote monitoring projects</a> before sending the final RFQ.
Questions purchasers often ask
Is an AMF panel the same as an ATS?
No. An AMF function starts the generator when mains supply fails. An ATS transfers load between mains and generator. Some projects combine them, but the RFQ should define the exact scope.
What signal usually starts the generator?
Many projects use a dry contact signal, but the actual arrangement depends on the controller, ATS, and switchboard design. It should be confirmed before panel production.
Should AMF settings be tested on site?
Yes. Mains failure delay, start delay, transfer timing, alarm outputs, and return-to-mains logic should be tested during commissioning.
What documents should buyers request?
Useful documents include wiring diagrams, control sequence, controller manual, alarm list, factory test record, and panel layout drawing.