Megger Overhead line testing system

Megger Overhead line testing system

The Megger Overhead Line Testing System is a critical tool designed for the inspection and maintenance of overhead electrical lines. This system is adept at identifying impedance irregularities such as short circuits, line breaks, and various intermediate conditions in disconnected overhead lines across all voltage levels. By revealing these issues, the system plays a crucial role in ensuring the operational integrity and safety of power distribution networks.

This testing system is most commonly utilized to evaluate overhead lines before they are re-energized. This pre-energization check is essential to prevent damage caused by traveling waves that occur when the lines are powered up. Such waves can exacerbate existing faults, potentially leading to catastrophic failures that could cause extensive damage and pose serious safety risks, including fatal accidents.

Regular inspections using the Megger Overhead Line Testing System are recommended to monitor the condition of these lines continuously. Changes in the line, which could indicate developing faults or deteriorations in line health, can be detected early, allowing for timely repairs and maintenance. This proactive approach to line management helps in maintaining consistent service reliability and extends the lifespan of the infrastructure.

A notable feature of this testing system is its specially designed switch-on mechanism and overall design that prioritize safety. These features significantly reduce the risks associated with induced voltages and currents during testing. By protecting operators from these potential hazards, the system not only ensures the safety of the personnel but also prevents damage to the testing equipment itself.

Megger Overhead line testing system specifications:

• Distance range: 20 m …1280 km bei v/2 = 80 m/μs
• Pulse width: 20 ns …10 μs
• Pulse amplitude: 30 … 160 V
• Resolution: 0,1 m @ v/2 80 m/μs
• Sampling rate: Up to 400 MHz (real sampling rate)
• Gain: – 37 … + 37 db
• De-attenuation: 0 … + 22 dB for ProRange
• Transit time setting: V/2 10 … 149,9 m/μs, ft/μs or nvp
• Dynamic range: > 80 dB
• Display: 15“ colour TFT SXGA, CCFL backlight
• Memory: 2GB flash for Data
• Ports: Ethernet, USB, RS232, DVI