Factory projects using 50Hz prime power should confirm duty rating, load profile, site voltage, ATS needs, fuel arrangement, and documentation before comparing diesel generator quotations.
What buyers should know first
A 50Hz prime-power request is different from a standby-only request. The supplier needs to know how many hours the generator will run, whether motor starting loads are frequent, what voltage and phase are required, and whether the site expects automatic transfer or manual operation. For export projects, the purchaser should also confirm the receiving country's grid standard and the inspection documents required by the project owner.
In practice
Most RFQ problems start when a single kW or kVA number is sent without duty, frequency, voltage, or load sequence. Yangzhou Tesla Power Equipment Co., Ltd. can quote diesel generator sets around project requirements, but the electrical assumptions must be clear before engine, alternator, control panel, canopy, and fuel system choices are compared.
| RFQ item | What to confirm | Why it matters |
|---|---|---|
| Frequency | 50Hz, and whether the alternator voltage must match a local grid | Frequency affects engine speed, alternator selection, and connected equipment |
| Duty rating | Prime, standby, or limited running-hour use | A prime set is selected differently from an emergency standby set |
| Load profile | Motor starts, compressors, pumps, welding loads, or variable factory loads | Starting current can require more generator capacity than running load alone |
| Controls | Manual start, auto start, or ATS interface | Control scope changes wiring, panel layout, and commissioning checks |
What to confirm before quotation
- List essential loads separately from non-essential factory loads.
- Send the starting method for the largest motors, such as direct-on-line, soft starter, or VFD.
- Confirm site voltage, phase, neutral arrangement, and cable entry direction.
- State whether the set will run outdoors, indoors, in a canopy, or in a container.
- Request drawings, controller model, alternator brand, test report, and packing details before order release.
Common configuration mistakes
- Treating a 50Hz prime generator as the same package as a standby generator.
- Ignoring derating needs for altitude, high temperature, or restricted ventilation.
- Sending only building area instead of connected load data.
- Leaving ATS scope vague until after the quotation is approved.
Useful internal references
Compare a live 50Hz product example such as <a href="https://www.tesladieselgeneratorset.com/products/500kw-volvo-diesel-generator-set-silent-type-container-type-50hz-for-primary-diesel-generator-unit-for-continuous-power-supply/">Volvo 500kW diesel generator set</a> with the site's <a href="https://www.tesladieselgeneratorset.com/factory-motor-load-diesel-generator-sizing-rfq/">factory motor load sizing notes</a> and <a href="https://www.tesladieselgeneratorset.com/60hz-export-diesel-generator-selection-notes/">60Hz export selection notes</a> when checking frequency assumptions.
RFQ information to send
- Required kW or kVA, voltage, phase, and frequency.
- Running hours per day and expected load percentage.
- Largest motor rating and starting method.
- Indoor, outdoor, silent, open, or containerized installation preference.
- Documents needed for customs, project approval, or site commissioning.
Questions purchasers often ask
Is 50Hz always 1500 rpm?
Many industrial diesel generator sets are configured around 1500 rpm for 50Hz output, but the final design should be confirmed from the engine and alternator proposal.
Can a 50Hz generator supply 60Hz equipment?
It should not be assumed. Motors, pumps, and controls may behave differently, so the project frequency must match the connected equipment requirements.
Should the RFQ use kW or kVA?
Send both when possible. kW describes real power, while kVA includes the power factor assumption used for generator sizing.
When is a silent canopy needed?
Use a silent canopy when outdoor noise, weather protection, or site access makes an open-frame set unsuitable.