The HZ-TWF-30 is a smart overhead distribution line monitoring system designed for 6kV 35kV medium-voltage networks. Installed directly on overhead conductors, it provides real-time current and voltage monitoring, traveling-wave fault localization, grounding fault detection, lightning fault recognition, and cloud-based diagnostics.The HZ-TWF-30 is a smart overhead distribution line monitoring system designed for 6kV–35kV medium-voltage networks. Installed directly on overhead conductors, it provides real-time current and voltage monitoring, traveling-wave fault localization, grounding fault detection, lightning fault recognition, and cloud-based diagnostics.

Model

HZ-TWF-30

Sensors

3 wireless sensors for Phase A, B, and C

Applicable Voltage Level

6kV–35kV

Monitoring Distance

35km

Fault Localization Accuracy

≤ ±150 m

Communication Method

4G / APN Private Network

Power Supply

CT Energy Harvesting + Solar Power + Energy Storage

GET A QUOTE

Traveling-wave Fault Localization

HZ-TWF-30 is a smart overhead distribution line monitoring system designed for medium-voltage overhead power networks.
Installed directly on overhead conductors, the device integrates data acquisition, signal processing, wireless communication, power management and remote diagnostics into a compact edge-monitoring platform.
It helps grid operators locate faults faster, reduce outage duration, improve maintenance efficiency and reduce manual field inspection workload.

Traveling-wave Fault Localization

Use high-frequency traveling-wave current signals and synchronized timing analysis to locate fault positions.

Applicable Voltage Level

6kV–35kV

4G COMMNICATION

Support fault line selection and section localization for faster troubleshooting.

Live-line Installation

Support installation directly on overhead conductors without interrupting line operation.

System Architecture

From field sensors to cloud-based line monitoring

Traveling-wave based fault localization

When a fault occurs on an overhead distribution line, high-frequency traveling-wave current signals are generated and propagate along the conductor.
HZ-TWF-30 captures these transient waveform signals and sends synchronized data to the monitoring platform.
By applying dual-end traveling-wave positioning algorithms and synchronized timing analysis, the platform can calculate the fault position along the distribution line.
This helps maintenance teams identify the fault location faster, reduce outage duration and avoid unnecessary line patrol.

HOW IT WORKS

01

Transient Signal Capture

Captures high-frequency waveform data generated during fault events.

02

Synchronized Timing

Uses high-accuracy timing to compare fault arrival signals.

03

Fault Position Calculation

Applies traveling-wave algorithms to calculate the fault location.

04

Maintenance Dispatch Support

Helps operators narrow down the inspection area and respond faster.

Technical Specifications

Core HZ-TWF-30 specifications

Key parameters for deployment, measurement, fault localization, communication and field operation of the HZ-TWF-30 Smart Overhead Distribution Line Monitoring System.

Device & Installation

Sensors

3 wireless sensors for A, B and C phases

Applicable Voltage Level

6kV–35kV

Installation Method

Live-line installation

Conductor Diameter Range

8mm–33mm

Device Weight

< 5 kg

Dimensions

280 × 163 × 138 mm

Power & Communication

Communication Method

4G / APN Private Network

Power Supply

CT Energy Harvesting + Solar + Energy Storage

Communications

Protection Rating

IP66

Flame Retardant Rating

Operating Temperature

-40°C to +85°C

Measurement Performance

Synchronization Accuracy

< 1μs

Current Measurement Accuracy

0–100A: ±0.5A / 100–600A: ±0.5%

Fault Current Measurement Range

0–9kA RMS

Minimum Detectable Fault Duration

≤ 40ms

Fault Detection & Localization

Fault Localization Accuracy

≤ ±150m

Ground Fault Localization Accuracy

100% when zero-sequence current ≥ 1A

Lightning Fault Recognition Accuracy

≥ 98%

Alarm Response Time

≤ 15 minutes

Supported Fault Types

Ground fault, short circuit, open conductor fault

Note: Specifications may vary according to project configuration, communication environment, line structure and deployment requirements. Please confirm final configuration with HERTZINNO before project implementation.

Traditional Method vs HERTZINNO Approach

From manual patrol to smart overhead line monitoring

Traditional distribution line troubleshooting often depends on manual patrol after a fault occurs. HZ-TWF-30 provides real-time monitoring, traveling-wave fault localization, cloud-based event analysis and remote diagnostics to help operators reduce outage duration and field inspection workload.

Monitoring Need

Traditional Method

HERTZINNO HZ-TWF-30 Approach

Fault Location

Fault search usually depends on manual patrol after an outage, which may require checking long feeder sections one by one.

Uses traveling-wave based fault localization and synchronized timing analysis to help calculate the fault position along the distribution line.

Ground Fault Detection

High-resistance grounding faults can be difficult to identify and locate, especially in long or complex distribution feeders.

Supports ground fault detection and localization, helping operators identify fault sections more efficiently.

Lightning Event Judgment

Lightning-related events and non-lightning faults often require manual investigation or delayed event confirmation.

Supports lightning vs non-lightning fault discrimination to improve event analysis and maintenance decisions.

Remote Line Visibility

Operators may have limited real-time visibility into line status, electrical parameters and transient fault events.

Continuously monitors electrical parameters and transient waveform data, then transmits events through 4G / APN private network communication.

Maintenance Response

Patrol teams may spend significant time narrowing down the fault area, increasing restoration time and operational cost.

Provides cloud-based alarms, event records, fault location support and AI-assisted diagnostics to support faster troubleshooting.

Installation & Operation

Some monitoring upgrades may require power interruption or additional field power supply planning.

Supports live-line installation and combines CT energy harvesting, solar power and energy storage for field operation.

Result: HZ-TWF-30 helps distribution network operators move from reactive patrol-based troubleshooting to data-driven overhead line monitoring with fault localization, event classification and centralized platform visibility.

Specifications

Travel Wave Based Line Fault Indication System Questions

What type of lines is HZ-TWF-30 designed for?

HZ-TWF-30 is designed for medium-voltage overhead distribution lines. It is suitable for overhead distribution network monitoring, fault localization and remote line diagnostics.

How does traveling-wave fault localization work?

When a fault occurs, high-frequency traveling-wave current signals are generated. The system captures these transient signals and uses synchronized timing analysis and traveling-wave algorithms to calculate the fault position.

Can HZ-TWF-30 be installed without power interruption?

Yes. The system supports live-line installation, making it suitable for distribution line deployment without interrupting normal operation.

What fault types can the system detect?

The system supports ground fault, short circuit and open conductor fault detection, and can also support abnormal discharge, hidden hazard monitoring and lightning vs non-lightning event discrimination.

How does the system communicate with the platform?

Field devices transmit data through 4G / APN private network communication to the HERTZINNO cloud-based monitoring platform.

Plan your smart overhead distribution line monitoring project.

Tell us your voltage level, line length, conductor diameter, communication conditions, fault localization requirements and monitoring platform needs. HERTZINNO can help configure the right HZ-TWF-30 deployment plan for your distribution network.

Request Solution Design

PRODUCTS: Acoustic Imaging Cameras; Acoustic Fingerprint Solutions; Fiber Optic Sensing

Contact Us: Greenland Mtown, No. 515, Huanke Road, Pudong District, Shanghai, China; info@hertzinno.com

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HZ-TWF-30 Smart Distribution Line Monitoring System

Traveling-wave Fault Localization

Traveling-wave Fault Localization

Applicable Voltage Level

4G COMMNICATION

Live-line Installation

System Architecture

Field Monitoring Terminals

Wireless Communication

Edge Analytics Engine

Web-based Monitoring Platform

Traveling-wave based fault localization

01

02

03

04

Core HZ-TWF-30 specifications

Device & Installation

Power & Communication

Measurement Performance

Fault Detection & Localization

From manual patrol to smart overhead line monitoring

Specifications

Travel Wave Based Line Fault Indication System Questions

What type of lines is HZ-TWF-30 designed for?

How does traveling-wave fault localization work?

Can HZ-TWF-30 be installed without power interruption?

What fault types can the system detect?

How does the system communicate with the platform?

Plan your smart overhead distribution line monitoring project.