Navigator LM MV

Overview

Shahig Navigator LM is an electronic fault passage indicator for medium-voltage utility overhead lines. It continuously samples the load current and automatically adapts its trip level to the network load profile.

Key Features

• Fault detection with self-adjusting trip current (load-dependent)
• LED indication with 360° visibility
• Double-flashing mode upon detection of a second fault
• Battery status indication with early warning
• Reset options by version: manual, time reset, current restoration, voltage restoration
• Installation on live overhead lines possible

Applications

• Overhead MV distribution networks
• Rapid fault section identification and crew dispatch optimization

Technical Data

• Trip current: ≥100 A / ≥100 ms (load-dependent self adjustment)
• Accuracy: ±10% at 20 °C
• Self-adjustment: >30 A load current; trip factor 4–6× load current
• Peak load memory: 72 h; adjustment delay: 60 s
• Visibility: >50 m (day), >150 m (night), 360°
• Flash rate: 30 flashes/min; total indication time >500 h
• Power supply: replaceable lithium battery; shelf life ≥20 years
• Max permissible voltage: ≤46 kV (50/60 Hz)
• Withstand current: 25 kA / 3 s
• Cable diameter range: 8–29 mm
• Housing: UV resistant polycarbonate/polyamide, IP68; stainless steel clamping yoke
• Temperature range: −30 to +75 °C (reference: IEEE 495 −40 to +85 °C)

Integrated Components

• Indicator unit with high-intensity LEDs (red/yellow)
• Clamping yoke for conductor mounting
• Magnet-based test/reset accessory (optional)

Compliance & Standards

IP68 enclosure; temperature range references include IEEE 495 (model dependent). Utility installation practices apply.