Outdoor Hydrophobic Cast Resin Current Transformer (Up to 24kV )

Property Specification

Type: Medium-Voltage Outdoor Hydrophobic Epoxy Resin Cast Current Transformer (Up to 24 kV)

Features: Solid cast construction using Hydrophobic Cycloaliphatic Epoxy resin for outdoor weatherproofing, UV resistance, arc tracking prevention, and reliable performance in severe or humid environments. Supports insulation voltages of 12 kV, 17.5 kV, and 24 kV with primary current ratings from 5 A to 1,875 A and high short-circuit withstand capabilities up to 63 kA. Designed in single-turn or multi-turn options with single or reconnectable (primary or secondary) ratio configurations. Accommodates 1 or 2 secondary windings for metering, protection, or Class PX applications.

Applications: Outdoor medium-voltage distribution infrastructure, pole-mounted metering and protection schemes, overhead line distribution substations, and outdoor switchgear installations subjected to harsh environmental or high-humidity conditions

Description

Technical Product Range & Performance Matrix

Technical Parameter / Feature Category Outdoor Current Transformer Specifications
Rated Voltage Classes & Insulation Levels

17.5 kV Class: 12/28/75 kV, 17.5/38/95 kV, 17.5/42/110 kV

24 kV Class: 12/28/75 kV, 17.5/38/95 kV, 24/50/125 kV, 24/60/150 kV

Rated Primary Current Range (In)

Standard Models: 1,250 A (extended rating up to 120%)

High-Capacity Models: 1,250 A (extended rating up to 150%), 1,875 A (extended rating 100%)

(Custom primary currents available on special request)

Rated Secondary Current 1 A, 5 A (combinations allowed in a single transformer)
Rated Short-Time Thermal Current (Ith, 1s)

Standard Models: Up to 31.5 kA

High Short-Circuit Models: Up to 63 kA

Reconnection Options Secondary side only, or dual Primary / Secondary reconnection
Rated Output Burdens & Accuracy Classes

Output Burden: 1 VA to 60 VA

Metering Classes: 0.2, 0.2S, 0.5, 0.5S, 1, 3

Protection Classes: 5P, 10P, Class PX

Operational & Environmental Limits

Rated Frequency: 50 Hz, 60 Hz

Ambient Operating Temperature: -60°C to +55°C

Insulation Class: Class E

Physical Characteristics & Creepage

Weight: 24 kg to 43 kg (depending on frame size and voltage rating)

Creepage Distance: 600 mm (17.5 kV class) / 800 mm (24 kV class)