Product Overview

Ring Main Unit C-GIS Bushing Type The secondary windings are full-enclosed in the flame retardant plastic shells,primary bushing or cable can pass through the inner hole, bottom has installation inserts for fixation. It is simple and shortcut, is suitable for measuring current, signal collection and protective relaying in the medium voltage power system of bushing or cable etc

Key Features

• Fully Sealed Harsh Environment Structure：Vacuum-cast epoxy resin enclosure with IP68 rating (submersible up to 2m long-term), withstands -45°C~+85°C extremes. Passes 1000-hour salt spray test and UL94 V-0 flame retardant certification, ideal for coastal, mining, chemical zones. Maintenance-free design ensures 30+ years service life.
• Wide-Range Multi-Tap Adaptability：Ratio range 50/5~2500/5A with 4 built-in taps (200/5A, 400/5A, 800/5A, 1600/5A), switched via pluggable links. 1:200 dynamic response maintains linearity from 0.5% rated current to 20kA short-circuit current.
• Fast Transient Response & Low Power：Special magnetic circuit prevents core saturation during faults. Protection winding acts within ≤8ms (5P20 class). No-load loss ≤0.6VA, load loss ≤0.3VA—35% lower energy consumption than traditional models.
• Smart Digital Interface Integration：Supports IEC 61850-9-2 (SV messages) and Modbus RTU. Built-in DSP enables waveform analysis and self-diagnosis, integrating with smart substation systems for remote monitoring and fault alert.

Technical Data

• Rated secondary current:5A,1A
• Power frequency withstand voltage: 3kV
• Rated frequency: 50/60Hz
• Installation site:Indoor
• Technical standard:  IEC 60044-1

Specification