Product Features

• Automatically clear single‑phase earth‑fault

  When single‑phase earth‑fault occurs on customer branch line, the sectionalizer trips automatically without affecting substation and other branch users on the feeder. A through‑type zero‑sequence current transformer with ratio 20/1 is built‑in for earth‑fault current detection (customer optional).
• Automatically isolate phase‑to‑phase short‑circuit fault

  When phase‑to‑phase short‑circuit fault occurs on customer branch line, the sectionalizer trips immediately and isolates the faulty line. Two through‑type protective current transformers (ratio 600/1 or customer‑specified) are built‑in for short‑circuit fault current detection.
• Fast fault‑location

  After sectionalizer protection is triggered by branch‑line fault, only the responsible customer is powered off. Fault information is reported actively. If communication module is equipped, fault data will be automatically sent to power management center.
• Customer load monitoring

  Wired or wireless communication accessories are optional to transmit monitoring data to power management center for remote real‑time load monitoring.
• Auto‑reclosing function

  Parameters such as reclosing times, reclosing interval, reset time and inverse‑time curve can be set by user.
• Accelerated tripping function for permanent fault

  Accelerated tripping and reclosing blocking will be activated when permanent fault is detected during reclosing sequence.
• Power‑on delayed closing and power‑loss delayed tripping functions.
• Loop‑network operation capability, suitable for loop network lines.
• Metering function: capable of measuring line voltage, current, frequency and electric energy, with remote data transmission to management center.
• Harmonic analysis function, providing reliable reference for grid pollution mitigation.
• Diverse controller configurations

  Supports conventional operation & protection. GSM / GPRS module is optional for SMS and remote PC control & protection. Hand‑held terminal can be added for switch control, parameter modification and status checking.
• Vacuum interrupter for arc‑extinguishing.
• Air‑silicone rubber‑epoxy resin composite insulation, eliminating insulation failure risks caused by oil aging in oil‑insulated equipment.
• Fully sealed stainless‑steel housing with superior sealing performance for explosion‑proof, anti‑condensation and anti‑pollution.