International Electrical Equipment Sourcing: From Enquiry to Delivery

Buying electrical power equipment for a project abroad involves more than choosing a product and paying for it. The requirement has to be understood, suitable manufacturers identified, offers compared on a technical and commercial basis, documents approved, equipment manufactured and tested, packed for the journey, shipped under clear delivery terms and handed over at the right place with the right papers. Each stage depends on the one before it. When the stages are coordinated, equipment is far more likely to arrive suitable, complete and documented. When they are not, problems tend to show up late, at customs, on site, or at energisation.

This article answers the question: what are the stages of international electrical equipment sourcing and project supply, from first enquiry to delivery, who does what at each stage, and what keeps the process clear for everyone involved?

What “international project supply” means

In international project supply, equipment is sourced from manufacturers in one or more countries and delivered to a project in another. The buyer may be a developer, an end user, a consultant acting for an owner, or a contractor building the project. A common case is a contractor from one country, for example a Turkish contracting company, building a project in another country and needing equipment that meets the destination’s requirements.

A sourcing and project-supply partner sits between the project and the manufacturers. Its role is to understand the requirement, identify suitable manufacturers, coordinate them, present clear offers, and follow the order through documentation, inspections, shipping and delivery as applicable to the agreed scope of supply and services. The applicable Incoterms rule determines the relevant delivery, cost and risk responsibilities between the contracting parties. AdepaTrade works in this way for equipment up to 36 kV, including distribution and power transformers up to 31.5 MVA, sourcing from manufacturers in Türkiye and internationally. It does not carry out EPC, installation or construction work.

The eight stages at a glance

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Stage	Main question	Main output
1. Understanding the requirement	What exactly is needed, for which system and site, to which standards and where?	A clarified requirement, with open points listed
2. Manufacturer coordination	Which manufacturers can supply each item suitably, and how do the items fit together?	Enquiries to suitable manufacturers; interface points identified
3. Technical and commercial evaluation	Which offers are technically suitable, and what exactly do they include?	A clear offer with stated scope, deviations, assumptions and delivery terms
4. Order placement	What has been agreed?	Order documents with the agreed technical and commercial basis
5. Documentation	Which drawings and documents are approved, and when?	Approved drawings and datasheets; test and inspection plans; final documents
6. Manufacturing and inspection	Has the equipment been built and tested as agreed?	Routine test reports; inspection or FAT records where applicable
7. Shipping	How does the equipment travel, and who is responsible on the way?	Packed, marked and documented consignments under agreed delivery terms
8. Delivery coordination	Has the right equipment arrived at the right place with the right papers?	Delivery at the named place; receiving checks; document handover

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Stage 1: Understanding the requirement

Everything starts with a clear picture of what the project needs. This usually comes from a combination of documents and conversation:

• Equipment scope and quantities, from a specification, an equipment list or a single-line diagram.
• System data: nominal voltage, frequency, earthing system, fault level, load.
• Applicable standards: IEC equipment standards as the primary reference, plus any IEEE/ANSI, national or utility requirements for the destination.
• Site and service conditions: ambient temperature, altitude, humidity, pollution, indoor or outdoor installation. See Defining Site and Service Conditions.
• Destination and delivery: country, named delivery place, expected delivery window.
• Project constraints: utility approval, approved-manufacturer lists, documentation language, inspection requirements.

Not all of this has to be available at the first contact. Part of this stage is identifying what is missing and agreeing what can be assumed for now. A short list of clarification questions, answered early, is far cheaper than a wrong assumption discovered after order. Preparing an RFQ for Electrical Power Equipment explains what is essential at the start and what can follow.

Stage 2: Manufacturer coordination

Once the requirement is clear, suitable manufacturers are identified for each item. Suitability is a technical judgment, not a catalogue match. It considers whether the manufacturer’s designs and tested ratings cover the requirement, whether it has relevant experience with similar equipment and conditions, and whether it can provide the documentation and tests the project needs.

Many projects need several equipment types from different manufacturers. A typical substation package might include MV switchgear, a transformer, an LV switchboard and possibly a package enclosure. In that case coordination also covers the interfaces:

• Matching electrical connections: cable terminations, bushings, busbar connections.
• Matching ratings along the chain, for example the transformer’s rated current against the LV incomer, and its impedance against the LV switchboard’s short-circuit rating (see Compact / Package Substations).
• Matching control and protection signals between items.
• Consistent documentation and labelling across the package.

Multi-manufacturer coordination is one of the main reasons projects work with a sourcing partner rather than approaching each manufacturer separately.

Stage 3: Technical and commercial evaluation

Offers are evaluated in two steps, in this order.

Technical evaluation. Does the offered equipment meet the requirement? This means checking ratings, standards, site conditions, interfaces, documentation and tests against the specification, and reviewing each declared deviation. A clear specification makes this much easier, as explained in Writing a Clear Electrical Equipment Specification. Where an alternative is offered, its equivalence is assessed by engineering judgment informed by project experience. It is not decided automatically from matching catalogue values or from a lower price. A value-engineering proposal is worth considering only when it maintains or improves technical suitability, functionality, quality and reliability for the actual project requirements.

Commercial evaluation. What exactly does the price include? A clear offer states:

• the scope of supply, item by item, and what is excluded;
• deviations and assumptions, so they can be reviewed;
• the delivery terms, normally an Incoterms rule with a named place;
• the expected delivery schedule, from order or from drawing approval;
• documentation and tests included, and any optional tests or services priced separately;
• validity of the offer and the main commercial conditions.

Two offers with different scopes or delivery terms cannot be compared on price alone. Normalising them, so each covers the same scope to the same delivery point, is part of the evaluation.

Stage 4: Order placement

The order records what has been agreed. It should refer to the specification, the offer, the agreed deviations and clarifications, the delivery terms and the documentation and inspection requirements. Anything agreed in correspondence but not reflected in the order documents is a common source of later disagreement.

Stage 5: Documentation

Documentation runs through the whole order, not only at the end.

• Approval documents after order: general arrangement drawings, single-line and schematic diagrams, datasheets, rating plate drawings, and calculations where required. Manufacturing of some items may wait for approval, so prompt review keeps the programme moving.
• Inspection and test plan, where applicable: which tests will be performed, which can be witnessed, and how much notice is given.
• Test reports: routine test reports for each unit, and type test reports for the offered design.
• Manuals: handling, storage, installation, operation and maintenance instructions from the manufacturer.
• Shipping documents: commercial invoice, packing list and the transport document, plus documents required by the destination country, for example a certificate of origin or conformity documents where they apply.

Destination requirements vary by country and should be confirmed at the start of the project, not when the equipment is ready to ship.

Stage 6: Manufacturing and inspection where applicable

During manufacturing, the manufacturer carries out the routine tests required by the equipment standard on each unit, for example under IEC 62271-200 for MV switchgear, IEC 60076-1 for transformers or IEC 61439 for LV assemblies (where they are called routine verification).

Where the project requires it, the buyer or a third-party inspection body may witness selected tests or carry out an inspection before dispatch. This is usually called a factory acceptance test (FAT) or pre-shipment inspection. It works best when the tests, witness points and acceptance criteria were agreed in the specification and order, so that the inspection confirms what was expected rather than reopening the requirement.

Stage 7: Shipping

Shipping international power equipment involves:

• Packing suited to the route, the transport mode and any storage period before installation. Climate, humidity and handling all matter.
• Transport planning for heavy or large items such as transformers and compact / package substations, including dimensions, weights and lifting points. Some items may be shipped partly dismantled, as defined by the manufacturer.
• Delivery terms. The Incoterms rule in the order, with its named place (and, for the C rules, the agreed place of delivery), defines where risk passes from seller to buyer, and who pays for which part of the transport, export clearance and import clearance. The rules do not define ownership transfer or payment, which are covered by the contract.
• Documents travelling with, or ahead of, the shipment, so that customs clearance at destination is not delayed.

Who arranges the main carriage depends on the agreed Incoterms rule. Under some rules the seller arranges it; under others the buyer or the buyer’s forwarder does.

Stage 8: Delivery coordination

Under the Incoterms rules, delivery, and with it the transfer of risk, takes place at the point the agreed rule defines. Under some rules this is at the destination. Under others, including the C rules, it happens when the goods are handed to the carrier at origin, even though the seller pays carriage to the named destination. Whichever rule applies, the practical aim is the same: the equipment reaches the site in the agreed condition with its documents. Practical steps include:

• Coordinating arrival with the site, including unloading and access, as the contract and delivery terms define.
• Receiving inspection: checking items against the packing list, looking for transport damage, and checking impact indicators where these were agreed.
• Storage according to the manufacturer’s instructions, if installation does not follow immediately.
• Handover of documents: test reports, manuals and final documentation.

Installation, cabling, connection and energisation are carried out by the project’s own contractors. On request, AdepaTrade can arrange on-site engineering supervision and commissioning support under a separate scope.

Who does what

Responsibilities vary by contract and delivery terms. The table shows a typical split; the order documents always govern.

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Party	Typical responsibilities
Customer (owner, developer, consultant or contractor)	Defines the requirement and site conditions; answers clarifications; approves documents; arranges installation and energisation; arranges import formalities where the delivery terms place them with the buyer
Sourcing and project-supply partner	Clarifies the requirement; identifies and coordinates suitable manufacturers; reviews offers technically and commercially; presents a clear offer; follows up documentation and manufacturer tests or inspections, and coordinates shipping and delivery, as applicable to the agreed scope of supply and services
Manufacturer(s)	Designs and manufactures the equipment; provides design and type test evidence; performs routine tests; supplies documentation; packs the equipment
Others, as needed	Freight forwarders and carriers; third-party inspection bodies; the destination’s authorities and utility

Illustrative scenario: one package, several manufacturers

Scenario (illustrative, not a project reference): a contractor is building a light industrial facility in another country and needs, for its electrical supply, two 11 kV ring main units, two 1 000 kVA distribution transformers, two LV main switchboards and a standby generating set. The project specification names IEC standards. The site is inland, hot and dusty, at moderate altitude.

1. Requirement. The first review finds that the fault level at 11 kV is not stated and that the site’s average temperatures are missing. Both are requested, and in the meantime the offer is prepared on clearly stated assumptions.
2. Coordination. Suitable manufacturers are identified for each item. The interfaces are listed: RMU transformer feeder to transformer MV terminals, transformer LV terminals to switchboard incomer, switchboard to generating set changeover.
3. Evaluation. One transformer offer proposes a different loss level from the specification. It is reviewed against the project’s loss evaluation basis and accepted, rejected or clarified with a reason. The LV switchboard offers are checked for circuit ratings at the stated room temperature.
4. Order. The order records the agreed deviations, the assumptions now confirmed, the delivery terms with a named place, and the witness tests requested.
5. Documentation. Approval drawings from each manufacturer are checked against each other at the interfaces before approval.
6. Inspection. The customer’s inspector witnesses selected routine tests on the transformers as agreed.
7. Shipping. Packing is chosen for a sea journey and a possible storage period on site.
8. Delivery. Items are checked against the packing lists on arrival. Installation is carried out by the contractor’s own team.

The value of the process in this scenario comes from the early clarifications and the interface checks, not from any single document.

What keeps international supply clear

• Share what you have early, even if incomplete, and list what is still open.
• Keep one requirement, with a single specification, one set of site conditions and one standards list.
• State the destination and delivery place from the start, because they affect standards, documents, packing and delivery terms.
• Agree tests and inspection before order, not during manufacturing.
• Review approval documents promptly, as approval often controls the manufacturing schedule.
• Confirm destination documentation requirements early.
• Keep the service boundary clear: supply and site work are separate scopes.

Relevant standards

Standard	What it covers	Why it matters
Incoterms 2020 (ICC rules)	Rules for the delivery obligations of seller and buyer, including where risk transfers and how costs are allocated, used with a named place	The common language for agreeing delivery terms in an order
IEC 62271-200	AC metal-enclosed switchgear and controlgear above 1 kV up to and including 52 kV, including type and routine tests	Defines the routine tests and type test evidence for MV switchgear
IEC 60076-1	Power transformers: general requirements, including routine, type and special tests	Defines which transformer tests are performed and documented
IEC 61439-1 and IEC 61439-2	LV switchgear and controlgear assemblies, including design and routine verification	Defines the verification evidence for LV switchboards
ISO 8528 series	Reciprocating internal combustion engine driven generating sets	Defines ratings and test requirements for generating sets
IEC 60721-3-1 and IEC 60721-3-2	Classification of environmental conditions for storage and transportation	A common basis for describing storage and transport conditions when choosing packing
ISO 9001	Requirements for quality management systems	A manufacturer’s certified quality management system supports confidence in process control. It does not certify the product itself
ISO/IEC 17025 and ISO/IEC 17020	Competence of testing laboratories, and of bodies performing inspection	Relevant when type test reports or third-party inspections are requested from accredited organisations

Destination-country customs, conformity and utility requirements apply in addition and are confirmed for each project.

Common mistakes

• Treating the first enquiry as the final requirement, without a clarification step.
• Comparing offers on price before checking that scope, deviations and delivery terms are the same.
• Accepting an alternative because its catalogue values match, without an engineering review.
• Ordering items for one substation from different manufacturers without checking the interfaces.
• Using an Incoterms rule without a precise named place, or assuming it also defines ownership or payment.
• Leaving witness tests and inspection requirements to be agreed after order.
• Discovering destination documentation requirements when the equipment is ready to ship.
• Assuming that equipment supply includes installation or commissioning.

Conclusion

International electrical equipment sourcing is a chain of eight stages: understanding the requirement, coordinating manufacturers, evaluating offers technically and commercially, placing the order, managing documentation, manufacturing and inspection where applicable, shipping, and coordinating delivery. Each stage depends on the clarity of the one before it, and the first stage, understanding the requirement, has the most influence on everything that follows. A sourcing and project-supply partner adds value by keeping the requirement clear, coordinating several manufacturers and their interfaces, putting technical suitability first and making the commercial basis transparent. Supply and site work remain separate scopes. On request, AdepaTrade can arrange on-site engineering supervision and commissioning support under a separate scope.

Related AdepaTrade solutions

AdepaTrade supplies MV switchgear, transformers, compact / package substations, LV distribution and critical-power equipment for international projects, sourcing from manufacturers in Türkiye and worldwide. Medium Voltage Distribution & Protection · Transformers · Compact / Package Substations