Some industrial generator projects need a neutral earthing resistor or a defined neutral grounding arrangement. This should not be guessed from the generator rating alone because it depends on the site electrical design, protection philosophy, and local requirements.
What buyers should know first
The generator supplier can support the package scope once the electrical consultant confirms the required neutral arrangement. Buyers should state whether the resistor, current transformer, enclosure, alarms, and connection cables are part of the generator supplier scope or the site electrical scope.
In practice
For mining, process plants, factories, and export projects, unclear neutral earthing scope can delay drawings and protection settings. Yangzhou Tesla Power Equipment Co., Ltd. should receive the single-line diagram or at least the intended grounding method before final offer approval.
| Item to confirm | Why it matters | RFQ detail to send |
|---|---|---|
| Grounding method | Different systems need different protection and connection details. | Single-line diagram or written neutral earthing requirement. |
| Resistor rating | Resistance and time rating must match the electrical design. | Consultant-provided NER specification if required. |
| Alarm and trip contacts | Controls may need to report resistor faults or earth fault conditions. | Required signals to panel, BMS, or protection relay. |
| Supply boundary | Unclear boundaries cause missing items during installation. | Who supplies NER enclosure, CTs, cables, and terminations. |
Before requesting a quotation
Share the load list, voltage and frequency, installation location, duty rating, control requirements, and any site limits before asking Yangzhou Tesla Power Equipment Co., Ltd. for a diesel generator set quotation.
- Do not ask the generator supplier to guess the earthing method without a project single-line diagram.
- Confirm whether the alternator neutral is brought out and how it connects to site switchgear.
- State whether protection relays and alarm contacts are required in the generator control panel.
- Request drawings that show the neutral terminal, grounding point, and supply boundary.
Related product and project pages
For a matching equipment reference, review <a href="https://www.tesladieselgeneratorset.com/products/factory-priced-1mw-cummins-engine-qsk38-g12-1500kva-1200kw-generator-with-ats-low-fuel-consumption-230v-480v-rated-voltage/">this diesel generator set product page</a>. For wider project planning, compare it with <a href="https://www.tesladieselgeneratorset.com/diesel-generator-short-circuit-protection-scope-checks/">this technical guide</a> before sending the RFQ.
Common questions
Is a neutral earthing resistor required for every diesel generator?
No. It depends on the site electrical system and protection design.
Who decides the resistor value?
The project electrical designer or consultant should specify it based on the system requirement.
Can the resistor be added after delivery?
Sometimes, but late changes can affect drawings, wiring, enclosure space, and testing.
What should be attached to the RFQ?
Attach the single-line diagram, grounding method, required alarms, and supply boundary notes.