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• By Category
• Circuit Breaker Diagnostics
• Continuous On-line Diagnostics
• Insulation Analysis
• Oil/Materials Analysis
• Partial Discharge Detection
• Protection Diagnostics
• Surge Arrester Monitoring
• Sweep Frequency Response
  Analysis
• Transformer Diagnostics
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DFA100 for Cable Applications

DFA100- a handheld instrument for diagnosis of cable accessories

DFA100 for non-intrusive diagnosis of high voltage cable terminations and cable joints

The DFA100 is our new handheld instrument for diagnosis of cable accessories. It is a battery powered instrument for detection and location of internal Partial Discharge (PD) in the insulation of cable accessories. The DFA100 includes an acoustic emission (AE) sensor and an acoustic wave guide consisting of insulated hot sticks. 

Benefits

• Monitors Non-intrusive in-service test of cable accessories
  
• Detection and accurate location of internal PD
• Reliable condition assessment of cable terminations and cable joints

Applications

• Potable and handheld tool for in-service inspection and monitoring of cable accessories
  
• Quality assurance of new cable accessories during commissioning
• General purpose tool to detect internal PD on other equipment, such as instrument transformers
• The DFA100 can be applied on live equipment - provided compliant with local safety regulations

Features

• Rapid results – the DFA100 is quick and easy to configure, giving results in seconds
  
• Reliability and ease of Use – the DFA100 produces high quality results with high repeatability allowing rapid and reliable decision making
  
• Battery operated – the DFA100 is a stand-alone hand-held instrument, which can operate up to 4 hours on one charge
  
• Wireless synchronization – the DFA100 is utilizing a wireless synchronization module for timing PD and mechanical activity against the power system frequency
• Selectable settings – the DFA100 provides recommended settings for testing both SF6 filled and oil filled equipment 
  
• Rugged and reliable – the DFA100 is an instrument with outstanding durability for field use
• Simple, user-friendly PC interface – a simple interface allows the test results to be uploaded to a PC. Previous data and nameplate configurations can also be downloaded to the DFA100

Description

DFA100 offers two measuring modes: continuous and phase

Continuous mode provides:

The continuous mode is used for surveying the apparatus and locating the primary source of the acoustic emission (AE) signal. The continuous measuring mode provides four scales of acoustic signal measurement: the RMS signal, peak signal, degree of modulation with fundamental frequency, and degree of modulation with second harmonic frequency. 

Phase mode provides:

The phase mode correlates the acoustic signal and the fundamental power signal, and generates an amplitude vs. phase plot. This information is used to determine the synchronizing nature of the acoustical discharges relative to the fundamental power signal. The patterns obtained are used to identify the nature of the source: PD, particles, and mechanical defects.

 

Additional Applications

The DFA100 can be applied for condition assessment of GIS and dead tank breakers, Click Here for more information on the DFA100 for GIS.

Specifications are subject to change without notice.
For more information, please contact us at info@doble.no

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