On-Load Tap Changer Analyzer - TAP-4

Zensol introduces a new instrument, the TAP-4 totally dedicated to Vibro-Acoustic measurements on On-Load Tap Changers.

Faults associated to On-Load Tap Changers are at the origin of up to 40% of the transformer failures.

This new instrument allows the maintenance crew to detect most of common OLTC malfunctions as contact wear, arcing in diverter, arcing in selector, synchronism problem, drive mechanism problem, brake failure etc..

The TAP-4 technology has been validated on many types of transformers including :

• MR Reinhausen
• ABB
• Ferranti
• Federal Pioneer

It can be applied on any equivalent.

The Tap-4 is used in conjunction with accelerometers (3 maximum) and a current sensor clamp. Its High Sampling Frequency of at least 100 KHz allows to record a large variety of mechanical and arcing problems.

The Tap-4 comes with powerful and user-friendly software, OpenZen - TAP, to record and analyze the OLTC events.

The software integrates many calculation and graphic functions to be able to build tests references and tests recordings for comparison analysis.

• Testing time is short because the transformer is On-Line
• Easy installation of accelerometers and current sensors
• Could be used as a diagnostic tool to select through a large number of transformers which ones will be candidates for a complete inspection
• Easy detection of mechanical OLTC problems
• Robust, Light and Portable
• For use in High Voltage environment
• Can be used on any type of transformers

• 3 Accelerometers inputs:
    . Accelerometer sensor type : ICP
    . Sensitivity : 100 mV/g
    . Measurement range : +/- 50g
    . Frequency range : 5 to 15000Hz
    . Constant current excitation 2 to 20 mA
• 1 current input
• Sampling Frequency : 100 KHz
• Sampling time : 10 microseconds
• Recording time : unlimited
• Data Acquisition system with 16 bit resolution for A/D conversion