PD-Guard Applications » PERMANENT ON-line Monitoring on HV Apparatus such as Transformers and Generators. » PERMANENT On-line Monitoring on HV Cable joints and Cable terminations. » Measurements are made according to international standards (IEC 60270, CIGRE 15/33.03.05) Benefits » Clear picture in regard to the current state from the insulation. » Reproducability and comparabillity » Improvement of maintenance schedule » Less unexpected breakdowns » Optimization of the life cycle Specifications » Resolution of apparent charge: 12 bit bipolar » Accuracy of phase resolution: 0.3 degree » PD measuring range (AUTO-ranging): up to 100.000 pC, attenuation in 6 dB steps up to 90 dB » PD frequency band: 10 kHz ... 2.000 kHz » Pulse repetition frequency: 50 kHz » Trigger sources: Phase, internal Mains, External » Power supply: 100 V to 240 V AC, 50/60 Hz, < 30 W » Pre-configured digital filters » range of low cut-off (40 dB per decade): 100 / 200 / 300 / 400 / 500 / 750 / 1'000 / 1'500 kHz » range of high cut-off (40 dB per decade): 500 / 1'000 / 1'500 / 2'000 kHz » Note: It is in accordance to IEC 60270 for a wide-band PD Instrument e.g. with a frequency range of 100-500 kHz. » Special UHF Type available Accessories » Bushing Tap Adapter with PD Measuring Impedance LDM-6 to connect to the bushing tap on transformers » PD Decoupling unit PDDC-24 with integrated Measuring impedance » PDDC-24 Installation Kit, used to install PDDC-24 on generators » Connection-Box to collect cables from LDM-6 or PDDC-24 for PERIODIC On-line monitoring on transformers and generators » External calibrator LDC-5 for external calibration of the standard PD measuring circuit according to IEC 60270 » Relay Box-Interface, to control external alarms (lights, buzzers etc.) » PD Guard-Interface allows access to PD Guard data on PC level for integration 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

PD-Guard purpose in Host (SCADA) system. Additional Pictures 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