Catalogue product
SZ 10-35 kV On-Load Tap-Changing Power Transformer
KOVYEL SZ series oil-imm…
COMPLETE PRODUCT RANGE · 11kV–220kV+
On-Load Tap-Changing Transformers
BROWSE THE RANGE
Catalogue products with project-specific matching.
Final model, material, dimensions, standard and test scope are confirmed against the approved RFQ data.
Send the project basics for a coordinated supply proposal.
Start project inquiry →VOLTAGE-SYSTEM CHECKPOINT
Confirm the system basis before selecting individual products.
| System voltage | 66kV |
|---|---|
| Typical equipment class | 72.5kV class where specified |
| Typical application | Sub-transmission and utility interconnection |
| Coordinated supply scope | Structures; conductors; OPGW; insulator strings; fittings; switching; arresters; grounding |
| Buyer data required | System and equipment voltage; insulation level; fault duty; conductor and OPGW data; loading; route environment; structure schedule |
Buyer questions answered before quotation
What changes when moving from 36kV to 66kV?
Insulation coordination, structure clearances, insulator strings, fittings, fault duty and testing normally require a separate coordinated design basis.
Is OPGW hardware included automatically?
Only when the cable construction, diameter, rated tensile strength, span and structure attachment are confirmed.
Which drawings are required?
Structure loading, insulator-string, conductor, OPGW and equipment-interface drawings should accompany the BOQ.