Duty & Load
Confirm standby, prime, continuous or portable duty; running and starting load; voltage, frequency and major transient loads. A rating only has meaning when the operating basis is clear.
ENGINEERING REVIEW
CHECK THE ENGINEERING BASIS BEFORE YOU APPROVE THE MACHINE.
A quotation can look complete and still leave the most important engineering assumptions undefined. Before supplier approval, PO release or production, confirm that the duty, configuration, site conditions, controls and test basis all describe the same machine you intend to buy.
01APPLICATIONWhat must the machine actually do?
02CONFIGURATIONWhich components and interfaces define the build?
03SITEWhat changes under real operating conditions?
04ACCEPTANCEWhat evidence proves the approved basis?
01 · REVIEW LAYERS
Engineering review is not one specification check.
A useful review follows the buying risk from application to acceptance. If one layer is undefined, the quotation may not be truly comparable.
Critical Configuration
Fix the engine, alternator, inverter or AVR, controller, breaker, cooling arrangement and other critical BOM items that materially change performance, serviceability or cost.
Site & Thermal Basis
Check ambient temperature, altitude, ventilation, enclosure, noise target, weather exposure and access. These conditions can change usable output and cooling margin.
Controls & Protection
Review alarms, shutdowns, ATS interface, remote communication, synchronization or paralleling requirements where applicable. Control scope should not be left to assumption.
Test & Acceptance
Define what will be tested, under which load and conditions, what readings are required and what counts as pass/fail. FAT without an agreed acceptance basis is only a demonstration.
Documentation & Service
Confirm drawings, manuals, labels, certificates, spare parts, warranty path and service documentation before shipment, not after a field problem appears.
02 · WHAT CHANGES THE BUYING RISK?
Small specification gaps can become expensive field problems.
The engineering review should expose where two “similar” quotations are actually based on different assumptions.
Wrong duty basis
A standby rating may be compared against a prime-duty requirement.
Substitution not controlled
The approved component may not be the component used in production.
Site derating ignored
High temperature or altitude can reduce usable output.
Control interface unclear
ATS, remote start, communication or synchronization scope may be missing.
Test condition undefined
A passed factory test may not represent the real application.
Service basis incomplete
Spare parts, warranty handling or field support may not be ready when needed.
03 · QUOTATION ≠ ENGINEERING BASIS
Price comparison only works after the technical basis is aligned.
If suppliers quote different duty assumptions, components, cooling arrangements or acceptance criteria, the cheapest quotation may simply be a different machine.
01 / REQUIREMENTApplication · load · duty · market · site
↓
02 / ENGINEERING BASISConfiguration · controls · cooling · interfaces
↓
03 / ACCEPTANCE BASISTest method · readings · tolerances · evidence
↓
04 / COMMERCIAL COMPARISONNow the quotations can be compared like-for-like.
04 · GENERATOR REVIEW EXAMPLE
For generators, these points usually deserve explicit confirmation.
The exact checklist changes by architecture, but the review should still connect the component choice to the application and acceptance basis.
RATINGStandby / Prime / Continuous
Confirm the rating definition, kW/kVA, power factor, voltage and frequency.
ENGINEModel + cooling basis
Match engine capability to duty, ambient condition and maintenance expectations.
ALTERNATOROutput + insulation + excitation
Review the electrical build, temperature rise and transient-load requirement.
CONTROLProtection + interfaces
Confirm alarms, shutdowns, ATS, communication and remote-control requirements.
ENCLOSURENoise + airflow + access
Noise reduction should not create a cooling or maintenance problem.
TESTLoad + acceptance + evidence
Specify which readings must be recorded and what requires correction or re-test.
05 · REVIEW OUTPUT
The buyer needs a decision summary, not another pile of supplier documents.
01Confirmed Basis
What has been technically aligned and can be treated as approved.
02Deviations
Where the supplier proposal differs from the requirement or approved configuration.
03Open Items
What remains unresolved before PO, production, FAT or shipment release.
04Buyer Decision
Which points require approval, rejection, negotiation or further evidence.