Drop‑out Fuse-Saving Auto Recloser OEM supplier

The RFS smart drop‑out auto recloser is a new-generation intelligent cutout switch integrating intelligent control, remote communication and auto-reclosing functions. It trips rapidly and recloses automatically when transient faults occur on overhead lines, significantly reducing outage duration and improving distribution network reliability. It can replace traditional drop-out fuses to achieve automation upgrade of distribution line protection.

Key Electrical Specifications

Features

1. Reclosing Logic: Supports 1 to 3 fast reclosing shots with adjustable delay from 0.1s to 60s. Adaptive reclosing strategy is available to suit complex grid conditions and clear transient faults efficiently.
2. Communication & Automation: Standard RS485 port; compatible with 4G/5G, GSM, IEC 60870-5-104, DNP3.0 and Modbus protocols. Seamless integration with distribution automation systems (DAS / DMS).
3. Fault Detection & Indication: Built-in overcurrent and short-circuit fault detection, with sensitive earth fault detection for accurate single-phase earth fault location. Local LED fault indication and remote fault alarm upload supported.
4. Operation Modes: Electric close & trip, remote control and local manual operation available. Equipped with visual contact position indicator for intuitive on-site inspection by field crews.

Product Advantages

1. Cost-Effective: Highly integrated design maintains excellent performance while cutting overall ownership cost, with short payback period (typically less than 2 years).
2. Flexible Customization: Rated current (200A/250A/320A) and interrupting rating (8kA/6.3kA) are optional for all voltage classes to meet diverse project requirements.
3. Dual-Standard Compliance: Designed and tested in accordance with IEC 62271-111 and IEEE C37.60, suitable for global markets.
4. All-Weather Performance: IP65 high ingress protection rating, reliable operation under harsh outdoor conditions: high temperature, high humidity, high altitude and strong UV radiation.

Typical Applications

1. Overhead distribution branch line protection (isolates transient branch faults to prevent widespread outages)
2. Incoming-side protection for distribution transformers (replaces conventional drop-out fuses for automation)
3. Interface of hybrid cable-overhead circuits (fast isolation of short-circuit faults)
4. Rural grids and remote off-grid areas (works with solar power supply where PT source is unavailable)

Selection Guide

All voltage classes support optional rated current (200A / 250A / 320A) and interrupting current (8kA / 6.3kA). Select model based on system voltage and load requirements.

Warranty & Technical Support

• International Certifications: KEMA, IEC, IEEE full type test certificates
• Warranty: 20-year long-term warranty, lifetime technical support
• Delivery: Standard models in stock; customized orders lead time ≤ 4 weeks