Partial Discharge Detectors
HV TECHNOLOGIES, Inc. provides you with accurate and reliable systems for partial discharge measurements of HV equipment such as transformers, generators, switchgear and cable systems in laboratory or on-site environments.
The DDX 9121b is the latest in the DDX family for Partial Discharge & Radio Interference Voltage testing. The DDX 9121b is modular and fits a wide range of PD detection applications. One measuring input to simultaneous 9 measuring inputs are possible. Traditional partial discharge measurements according to IEC 60270 or RIV measurement or PD under DC are covered. The DDX 9121b comprises 1 of 9 stackable units communicating with a remote PC (optional), which handles the display of PD information using the DDX 9121b/SWR data acquisition and remote control software. The software displays test results and generates reports. The DDX9121b increases the laboratory sensitivity as it is equipped with digital filters allowing the measurement frequency band to be shifted into a less noisy range and suppressing frequency dependent noise.
This high resolution stand-alone PD detector can be used for various PD testing applications according to IEC 60270. There are 3 versions available:
- HTP-2/D - alphanumeric LCD is situated on the front panel of the detector showing the measuring values in pC and the frequency of the applied test voltage.
- HTP-2/W - measuring data access is given via web browser with calibration, test voltage, charge, and various diagrams.
- HTP-2/S - PD detector is supplied with HVT Software Suite for PC operation and with advanced functionality with recording of tests and replay of results.
Unconventional measurement technology in ultra high frequency (UHF) ranges (MHz to GHz) is commonly used for on-site PD testing. This has the added benefit that an online test can be conducted since the measurement method does not require galvanic coupling to the high voltage conductors. PD measurement system based on UHF technology is designed for field application for a very sensitive measurement of PD signals from MV, HV, and EHV cable accessories, as well as power transformers and GIS. During UHF measurements, stronger attenuation of distant signals allows for very favorable signal-to-noise ratios and locally selective PD tests.
The Portable PD Detector allows for testing and the quick evaluation of switchgear, cables, and other HV equipment with integrated transient earth voltages (TEV) and non-contact ultrasonic (AA) sensors. The handheld detector is also equipped with a standard BNC interface to allow for the connection of an external HFCT sensor for PD testing of cables. A large integrated LCD display shows the real-time measurement results as a function of amplitude, pulse number, severity, phase-resolved PD pattern, and phase-resolved pulse sequence. Waveform recording can be activated automatically or manually with the ability to save onto a flash drive and export the results via USB or WIFI connection.
The reliable ultrasonic probe allows you to sniff out electrical PD signals such as corona, tracking, or arcs by detecting the emitted ultrasound of the discharges, which helps to avoid insulation breakdown damage by early recognition of critical failures. The acoustic level is displayed on the LCD screen and is audible with headphones. Thanks to a number of included accessories and probes, the device can be perfectly adapted to any application. Detection over short distances can be conducted with the air-borne sound probe, or can be adapted for investigating angled locations with a bendable probe. For detection over greater distances, the parabolic mirror and laser pointer can be used. An optional accessory is the body sound probe, which can be used for the location of PD signals on grounded surfaces (e.g., transformers, switchgear, generators, etc.).
Most modern non-destructive VLF partial discharge diagnostics system. Allows for the identification and precise location of partial discharges in cable systems. Measures PD levels and locates PD sources reliably over the entire cable line. Very easy operation via BAUR’s diagnostics software.
The portable Online PD Spot Tester is a reliable and easy to use instrument to measure partial discharge activity in cables and switchgear during normal mains operation. The core technology of the Liona software is based on the DeCIFer® algorithm from IPEC Ltd, which is able to clearly differentiate between PD signals and noise signals. Liona is a lightweight and simple instrument to reliably assess the current status of your cable system and can help contribute to the value of your operation.