Factory diesel generator RFQs should define breaker rating, cable entry, terminal direction, earthing, ATS boundary, short-circuit data, and site drawings.
What buyers should know first
Factory generator RFQs often focus on engine brand and kVA, while the electrical interface is left vague. Breaker rating, cable entry direction, terminal space, neutral arrangement, earthing, ATS boundary, and short-circuit information can all affect installation cost and site work.
For Yangzhou Tesla Power Equipment Co., Ltd. to quote the package correctly, send the project load data, installation conditions, and electrical boundary requirements together rather than separating them across several messages.
In practice
A generator set may be technically suitable but difficult to connect if cable trays, trench position, switch room layout, or breaker scope were not discussed. Share the factory single-line diagram and intended cable route before finalizing the quotation.
| Interface point | What to confirm | Why it matters |
|---|---|---|
| Main breaker | Ampere rating, poles, trip type, enclosure position | Defines protection and connection boundary |
| Cable entry | Top, bottom, side, front, rear, trench or tray | Avoids rework during installation |
| Neutral and earthing | TN/TT/IT arrangement and neutral link requirements | Affects safe connection and protection design |
| ATS boundary | Included, excluded, or by electrical contractor | Prevents duplicated or missing switching equipment |
What to confirm before quotation
- Send the factory single-line diagram and proposed generator location.
- Confirm main breaker rating, fault-level requirement, and cable lug space.
- State whether outgoing cables enter from bottom, side, or rear.
- Confirm earthing and neutral requirements with the project electrical engineer.
- Ask for terminal box or control panel drawings before production when space is tight.
Common configuration mistakes
- Ordering the generator before confirming cable route and panel orientation.
- Assuming ATS and main breaker are both included without checking the quotation.
- Ignoring neutral arrangement until commissioning.
- Comparing prices without matching breaker brand, rating, and protection scope.
Internal references for specification work
For automatic switching context, review ATS requirements for diesel generators. For sizing and load details, see industrial backup power sizing notes. For frequency and voltage planning, compare 50Hz and 60Hz selection guidance. A related product reference is 500KW Volvo Diesel Generator Set Silent Type Container Type 50Hz for Primary Diesel Generator Unit for Continuous Power Supply.
Documents to request with the offer
- Single-line diagram
- Cable schedule
- Generator arrangement drawing
- Breaker specification
- Earthing requirement
- ATS boundary note
Questions purchasers often ask
Should the generator supplier provide the main breaker?
Often yes, but it must be listed in the quotation with rating, pole count, trip type, and installation position.
Why does cable entry direction matter?
Wrong entry direction can force extra bends, longer cables, or enclosure modification at site.
Does ATS replace the generator breaker?
No. ATS and generator breaker perform different roles. The final arrangement should be checked in the single-line diagram.
What if the factory does not have final cable sizes yet?
Provide estimated load current, voltage, installation distance, and panel layout so the supplier can reserve practical terminal space.
Before sending an RFQ, prepare the connected load list, operating voltage, frequency, duty rating, installation layout, ambient conditions, fuel autonomy target, and any electrical boundary drawings. Clear inputs help the supplier quote the generator set instead of guessing the project scope.