Hairpin Oil-Insulated Current Transformers (30.5–330kV)

Property Specification

Type: High-Voltage Outdoor Oil-Insulated Hairpin Current Transformer (30.5 kV to 330 kV)

Features: Designed specifically for outdoor substation installations, this transformer utilizes an oil-filled hairpin (bottom-tank) construction spanning voltage levels from 30.5 kV up to 330 kV. Units are custom-manufactured to client engineering requirements and come equipped with standard brown porcelain or optional composite silicone rubber insulator housings. .

Applications: Commercial revenue billing and precision metering, transmission system protective relaying, and grid telemetry, power flow direction monitoring, and supervisory control.

Description

Key Technical Performance Specifications

Technical Parameter / Specification Specification Rating / Capability
Deployment / Environment Outdoor
Structural Architecture / Construction Hairpin Configuration
Dielectric Insulation Medium Oil-Impregnated Paper
Rated Maximum System Voltage 30.5 – 300 kV
Maximum Primary Current Capacity Up to 4000 A
Short-Circuit Thermal Current Rating Up to 63 kA
External Insulator Material Porcelain (Silicone Rubber Optional)
Specific Creepage Clearance ≥ 25 mm/kV (Extended distances upon request)
Operating Ambient Temperature Limits -40°C to +40°C (Standard)*
Standard Installation Altitude ≤ 1000 m (Standard)*