A 220kV transmission line supply package for high-voltage routes using bundle conductors, 245kV insulation systems, line hardware, OPGW and controlled project delivery.
Which equipment and hardware are required for a 220kV transmission line project?
A 220kV project normally includes heavy lattice towers, single or bundle phase conductors, earth wire and OPGW, 245kV insulator strings, suspension and dead-end assemblies, yoke and corona hardware, spacer dampers, vibration dampers, joints, repair systems, tower earthing, terminal interfaces, testing evidence and route-coded packing.
TYPICAL SYSTEM BASIS
220kV starting point.
The following values organize the first technical review. They do not replace the utility specification.
Nominal system
220kV
Equipment class
245kV
Phase arrangement
Single or bundle conductor
Structure
Heavy lattice tower
Electrical control
Corona and grading hardware
Delivery
Tower / route-coded shipment
COORDINATED SUPPLY PACKAGE
Products matched as one line system.
Every group is checked against the same structures, conductors, insulation, equipment interfaces and approved project codes.
01
Heavy tower & conductor system
High-voltage route structures and phase system.
Heavy lattice towers and structural steelwork
Tower fittings, fasteners and foundation hardware
Single, twin or multi-bundle ACSR/ACAR conductors
Earth wire and OPGW
Jumper and terminal conductors
02
245kV strings & bundle hardware
Electrical and mechanical control of the complete phase assembly.
Suspension and tension insulator strings
Dead-end and suspension hardware
Yoke plates, grading rings and corona hardware
Spacer dampers and vibration dampers
Compression joints, repair sleeves and connectors
03
HV interfaces & delivery control
Terminal equipment, communication and evidence.
245kV arresters and disconnectors where specified
HV cable terminations and tower earthing
OPGW hardware and communication accessories
Type/prototype and routine test support
Material traceability and route-coded packing
TYPICAL APPLICATIONS
Where this package is used.
01Long-distance bulk power transmission
02Grid backbone interconnection
03Generation evacuation corridors
04High-capacity industrial connections
05Desert, coastal and high-pollution routes
TECHNICAL COORDINATION
Interfaces to close before final quotation.
01
Confirm bundle geometry and sub-conductor spacing before spacer and spacer-damper selection.
02
Use electric-field and string drawings to coordinate corona rings, grading devices and string hardware.
03
Match conductor data and route spans to joint, dead-end, repair and vibration-control systems.
04
Plan tower-coded packing and phased shipments before production to avoid site-sorting delays.
RFQ INPUTS
Information the buyer should provide.
Unknown fields may be marked “to be confirmed,” but they should remain visible in the clarification list.
01Approved route and tower schedule
02Tower and string assembly drawings
03Conductor bundle geometry and data sheets
04Earth-wire and OPGW information
05Insulation coordination and pollution level
06Corona/grading and vibration-control requirements
