Specify black start diesel generator requirements by checking starting sequence, control power, battery scope, ATS logic, and critical load assumptions.
What buyers should know first
A black start request means the generator may need to energize key loads when normal power is unavailable. The RFQ should define which loads start first, how controls receive power, whether ATS or switchgear is included, and what the site expects during restoration.
For Yangzhou Tesla Power Equipment Co., Ltd. enquiries, the useful starting point is not only the engine brand. The purchaser should state the site load, duty rating, voltage, frequency, installation limits, control scope, and the documents expected with the quotation.
In practice
| Item to confirm | Why it matters | What to send with the RFQ |
|---|---|---|
| Starting sequence | Large motors and transformers can overload the set if started together. | Step list with kW, kVA, motor size, and starting method. |
| Control power | Breakers, PLCs, chargers, and ATS controls may need power before the site is stable. | Control voltage and auxiliary power requirements. |
| Battery and charger | Poor battery scope can defeat the start requirement. | Battery autonomy, charger input, ambient temperature. |
| Operator role | Manual and automatic recovery modes need different control logic. | Sequence description and responsibility boundary. |
What to confirm before quotation
- State whether the generator must start automatically after utility failure or after an operator command.
- Separate critical loads from loads that can wait until the system is stable.
- Confirm whether synchronization, paralleling, or load shedding is part of the package.
- Ask for control wiring boundaries between generator panel, ATS, switchgear, and site PLC.
- Define the acceptance test so the supplier knows how black start performance will be verified.
Common configuration mistakes
- Writing black start in the RFQ without a load sequence.
- Forgetting battery charger supply and space heater supply during a complete outage.
- Assuming every standby generator package includes switchgear logic for staged restoration.
- Testing only no-load start instead of the required critical load sequence.
Documents to request
- Critical load list and starting order.
- Single-line diagram with ATS, breaker, and switchgear scope.
- Control philosophy for automatic and manual operation.
- Factory test and site commissioning checklist.
Related products and technical notes
Use live product data as the source of truth for engine model, rated output, voltage, and enclosure options. These pages are useful starting points for a quotation review:
- Diesel generator set
- Diesel generator set
- Diesel generator set
- Low-Voltage and Medium-Voltage Diesel Generator Package Checks
- Parallel Diesel Generator Set Planning for Factory Expansion
- Outdoor Silent Diesel Generator Installation Checks for Hospitals and Factories
Before requesting a quotation
Send the load list, required kW or kVA, voltage, phase, frequency, altitude, ambient temperature, duty rating, enclosure preference, ATS or paralleling requirement, fuel arrangement, and delivery destination. If the generator will feed emergency, medical, production, or data equipment, include the one-line diagram and the required handover tests.
Common questions
Is black start the same as standby power?
No. Standby power covers backup supply after failure. Black start also considers how the facility is energized from a dead condition.
Does every project need paralleling?
No. A single generator may be enough if the critical load can start within its capacity and sequence limits.
What should be checked for motor loads?
Provide motor kW, starting method, starting current if known, and whether motors can start one by one.
Can the supplier define the full sequence?
The supplier can advise on generator limits, but the facility owner or engineer should define which loads are critical.