Use one row for each distinct electrical configuration
Assign each equipment group a tag that matches the one-line and specification revision. Separate equipment when its voltage ratio, winding arrangement, protection, enclosure or other controlling requirement differs, even if the kVA or ampere rating is identical.
| Equipment group | Keep with the row | Quantity and release basis |
|---|---|---|
| High-MVA substation or GSU transformers | MVA by cooling stage; all winding kV; operating duty; connections; taps; impedance basis; frequency; controlling utility specification | Total units, matching requirements, first arrival, later phases and unit-specific delivery plan |
| 500 kVA+ pad-mounted transformers | kVA; primary and secondary voltages; loop/radial; live/dead front; terminations; fluid; winding material; enclosure and required listing | Quantity per exact design, destination and arrival phase |
| 500 kVA+ dry-type transformers | kVA; voltage ratio; cast-resin or VPI requirement; insulation and temperature-rise basis; enclosure; dimensions; terminations and specified tests | Indoor/outdoor scope, quantity per design and any separately quoted accessories |
| Medium-voltage switchgear | Rated voltage; bus current; short-circuit duties; lineup construction; main/tie/feeder arrangement; protection; controls; station supply and enclosure | Complete lineups and sections, spares, drawing approval and test hold points |
| Circuit breakers | Exact model or accepted design; voltage; continuous current; interrupting/making and short-time duties; control voltage; mechanism and interfaces | Operating devices and spares separately; installed-equipment compatibility review |
| Low-voltage switchboards, ATS and busway | Equipment function; voltage; amperes; fault rating; poles; switching sequence; dimensions; connection and control requirements | Separate ATS, switchboard, UPS interfaces and busway scope; ampere rating alone does not define the package |
Worked example: an equipment order with three arrival phases
This planning example shows how quantities move through a quotation. It is not a stock offer, engineering design or delivery commitment. The project's responsible engineer determines transformer sizing, redundancy, protection and system compatibility.
State calendar arrival dates beside Phase A, B and C in your actual request. Optional units belong on separate rows and do not increase the firm quantity. If a later phase changes the design, give it a separate equipment tag.
Ask the quotation to identify what is included inside each complete switchgear lineup. Count separately ordered spares once; avoid counting the same installed breaker again as an additional device order.
| Group / illustrative requirement | Firm total | Phase A | Phase B | Phase C |
|---|---|---|---|---|
| TX-PM-01: 2,500 kVA padmount; voltage and full design supplied by buyer | 24 units | 8 units | 8 units | 8 units |
| TX-DT-01: 1,500 kVA dry type; full design supplied by buyer | 12 units | 4 units | 4 units | 4 units |
| SG-MV-01: complete MV lineup to approved one-line | 3 lineups | 1 lineup | 1 lineup | 1 lineup |
| CB-SP-01: matched MV breaker spares, separate from installed devices | 3 spares | 1 spare | 1 spare | 1 spare |
| TX-HV-01: utility-side high-MVA transformer group | Separate schedule | State actual requirement | State actual requirement | State actual requirement |
Fast lead times: confirm the nine-week target against the actual release
J&J targets nine weeks for qualifying new OEM equipment, including pad-mounted and dry-type transformers from 500 to 10,000 kVA, switchgear and breakers. The target includes manufacturing, agreed factory testing and shipping to the quoted destination after PO, approved drawings and production release. The factory confirms the configuration, quantity, production slot and site-arrival date in the written quotation. Large high-voltage power transformers have a separate unit-specific release and delivery schedule.
- Identify the approved equipment tags and drawing revision covered by the production release.
- Confirm the factory allocation and how many units or complete lineups it covers.
- Define agreed factory testing, witness requirements and the document release needed before shipping.
- Name the delivery point and included freight responsibilities; agree offloading and field work separately.
- Ask for a written arrival date for each phase, including any equipment with a different lead time.
Close the open items before accepting a package
For every equipment tag, retain the offered design, included tests and accessories, open deviations, named reviewer and written decision. A quoted substitute should be compared with the controlling requirement before commercial acceptance.
| Item | Written record |
|---|---|
| Technical acceptance | Required versus offered specification and the engineer's disposition of deviations |
| Manufacturing and certification | Named manufacturing entity, offered product model and evidence for each required certification or listing |
| Warranty | Named provider, start event, duration, covered scope, transfer terms and exclusions |
| Arrival and receiving | Quantity, destination, agreed arrival date, unloading and separately included field responsibilities |
| Order validity | Quote revision, expiration, payment milestones and equipment reservation or production-release conditions |
Email the schedule you already have
Attach your existing equipment schedule, BOM or one-line to a direct email. Include the project location, first required arrival and procurement contact. You can start with the equipment groups already defined and resolve the remaining design information during the quote review.
Common questions
Written quotes and supporting records control unit-specific ratings, availability, condition, price, and delivery.
Can one RFQ include transformers, switchgear and breakers?
Yes. Send one equipment schedule with a distinct tag, specification, quantity and arrival phase for each group. The quotation confirms the offered scope and availability for each item.
Can I include padmount and dry-type transformers from 500 kVA?
Yes. The OEM quotation programme covers qualifying requests from 500 to 10,000 kVA. Requested size, construction, listing, quantity and factory allocation are confirmed for the quoted equipment.
Does a 4000A rating define the ATS and the switchgear?
No. The equipment function, voltage, fault duty, switching arrangement, protection and interfaces must be defined. An ATS, a low-voltage switchboard and medium-voltage switchgear are separate equipment scopes.
Does the example promise all phases within nine weeks?
No. It is a planning illustration. The factory must confirm the actual configuration, quantity, release and arrival dates. Large high-voltage transformers have separate unit-specific schedules.