Start with network and insulation data
State the nominal system voltage, highest voltage for equipment, insulation level, primary and secondary ratio, frequency, phase, vector group, neutral arrangement and fault level. These inputs determine more than the 20 kV product label and should be aligned with the local utility or project specification.
Define load duty and capacity
The present page does not establish a verified capacity range. Describe continuous and peak load, diversity, motor starting, harmonic sources, renewable interfaces, overload requirements and future expansion. The proposed kVA and thermal margin must be confirmed in the quotation and technical schedule.
Review sealed construction as a complete system
Evaluate tank construction, oil filling, pressure behavior, temperature indication, tap arrangement, bushings, terminals and maintenance access together. A sealed design should not be presented as universally maintenance-free, leak-proof or suitable for every environment without model evidence.
Set measurable performance requirements
Provide permitted no-load loss, load loss, impedance, temperature rise and noise. Ask the supplier to state the cooling method and guaranteed figures for the offered rating. The database material field lists Copper/Aluminum, but the actual conductor or winding material and any available selection must be tied to the quoted design and documented performance.
Coordinate protection and installation
Share upstream and downstream protection, cable sizes, surge-protection requirements, foundation, clearances, cable entry and earthing arrangement. Also declare ambient temperature, altitude, dust, humidity and corrosion exposure so accessories and enclosure treatment can be reviewed.
Control standards and test claims
IEC 60076 appears in the database record, but this does not establish certification or full compliance. Specify the standard edition, routine, type or special tests, witness requirements and report list. Each claim must be checked against the selected rating and document scope.
Build the 20 kV enquiry package
Send the electrical schedule, single-line diagram, load profile, loss limits, taps, winding preference, accessories, environment, tests, quantity and destination. A complete enquiry allows the response to separate confirmed data from items still requiring engineering review.
Related product and project resources