AC High Voltage Partial Discharge Tester with Micro Wave Sensor ACPD-05A RM Prüftechnik GmbH
In this new and worldwide unique Insulation test system, a digital programmable AC high voltage supply is combined with a simple to use PD test system, which does not demand for special conditions of the test environment. Classical PD systems with capacitive signal coupling typically need a "Faraday cage" for the DUT which is not an economical solution i.e. under production conditions. Through the special filter method with narrow band filter in 1.7 GHz band, all relevant noise frequencies are carefully eliminated and the PD signal is recorded via patch antenna -which detects the accompanying micro waves- and the evaluation unit with graphical user interface.
Visualisation of the PD effects
The signal of the AC source is displayed in real time which allows phase resolved display of the PD characteristic. Several graphical screens allow a pin-pointing and complete evaluation of the PD effects and the condition of the insulation.
Stable testing at very high repeatability
Since the non-contact patch antenna only detects the microwaves which appear during PD and through the active high pass filtering in GHz range, the recorded signal is practically noise free and allows evaluation with very high sensitivity.
Therefore it is usable under nearly all environmental conditions.
Cost efficient design
The relatively simple but highly sensitive circuit composition allows a very cost efficient design and assembling of the instrument in opposite to classical systems. A Faraday Cage becomes obsolete.
Equipped with valuable and useful test functions
In addition to the possible AC breakdown voltage, the PDinception voltage and PD extinction voltage as well as the PD level, the relative PD amount and - probability are evaluated and graphically displayed.
Characteristics
◎ The patch antenna and the PD sensor detect and process the magnetic waves which occur during PD ◎ By putting the antenna close to the DUT, a high sensitivity of the PD signal is guaranteed ◎ Because the system is not influenced by the environment and easy to handle, it allows integration in production lines
◎ A fully automatic testing is possible by means of tolerance parameters
◎ All relevant parameters of PD testing are supported and evaluated against thresholds: Partial Discharge Inception Voltage (PDIV), Partial Discharge Extinction Voltage (PDEV), relative PD level (PD peak), PD pulse (PD occurring probability) etc.
◎ Through the graphical display of all parameters, a visualised check of the condition of the DUT is possible
Application
◎ Electrical Machines: frequency controlled drives ・ electro-mobility ・ automotive products
◎ Transformers of any kind ・ chokes, solenoids and other electromagnetic components
◎ Power Semiconductors ・ insulation materials of any kind
-
zoom
02 May 2012
