LDP-5 Anwendungen » Detection of dangerous partial discharges (PD) » Mode for differential measurement with respect to PD fault location » Diagnostics on HV apparatus in field (for instance cable sealing ends and joints, surge arrestors, power transformers, voltage transformers and electrical machines) » Evaluation of the PD behaviour of low voltage components (for instance in the case of opto-couplers, capacitors, transformers and motors) Vorteile » battery powered portable device for both, on-site and laboratory PD diagnosis » Low Cost PD detector for research and development Beschreibung » Detection of the electromagnetic transients of PD events » Measuring the PD quantity "apparent charge" » Exchangeable capacitive and inductive sensors » Potentialfree signal transmission via fibre optic link » Noise reduction mode » Measuring sensitivity if charges pulses are directly injected : 0,05 pC » Gain steps : 1, 2, 5, 10 » Vernier range : 1 : 5 » Output (CHARGE) at full load » Pulse shape : triangular, positive » Pulse magnitude : 4 V approx. » Pulse rise time : < 2 ìs » Pulse duration : 50 ìs approx. » Noise level : < 0,2 V » Pulse resolution performance for superposition error < 30% » Pulse repetition rate : < 100 kHz » Double pulse distance : > 2 ìs » Power supply : 8 Mignon batteries (LR6) » Dimensions : 220 × 60 × 100 » Weight : 1 kg approx. Zubehör » LDC-5 - Calibrator for external calibration of the PD measuring circuit in pC of apparent charge up to 500 pC » LDA-5/U4 - UHF-Converter » LDO-5 - Optical receiver for potential-free signal transmission » LDA-5/S4 - Ultra Sonic Adapter » LDA-5/K - Acoustic Converter Doble Lemke GmbH Zschoner Ring 9, 01723 Kesselsdorf / Dresden Germany www.doble-lemke.eu Doble Lemke AG Kaiserstrasse 9, 4310 Rheinfelden Switzerland www.doble-lemke.eu

LDP-5 » Carry case "G" which contains the basic equipment » Carry case "E" which contains the basic equipment and main accessories » Carry case "B" which contains extended accessories Weitere Bilder Doble Lemke GmbH Zschoner Ring 9, 01723 Kesselsdorf / Dresden Germany www.doble-lemke.eu Doble Lemke AG Kaiserstrasse 9, 4310 Rheinfelden Switzerland www.doble-lemke.eu