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HIGH VOLTAGE TESTING AND MEASURING TECHNOLOGY 2000 by LEMKE DIAGNOSTICS GmbH, Germany

LEMKE DIAGNOSTICS GmbH proudly presentsthe latest developments in Partial Discharge Measuring Technology Capacitance and Loss Factor Measuring Technology Complete High Voltage Test Systems Performances of our DKD Calibration Laboratory

Some examples of high sophisticated measuring systems

Partial Discharge TechnologyThe Partial Discharge Measuring Systems of LEMKE DIAGNOSTICS GmbH are suitable for measurements of high voltage equipment, such as: Motors and generators Transformers and converters Medium and High Voltage Cables Cable accessories Arresters Switchgears Capacitors

Partial Discharge TechnologyComplete Partial Discharge Measuring System LDS-6 with Measuring Impedance, Multiplexer and Calibrator

Partial Discharge TechnologyThe Digital Partial Discharge Measuring System LDS-6 has the following main features: Useable with standard PD measuring circuit according to IEC270 Using advanced digital signal processing hardware Different processing units (PU) available, like wide band PU linear and logarithmic, narrow band PU Noise gating unit for sensor-controlled rejection of external noise pulses Windowing unit for rejection of phase-related noise pulses

Partial Discharge Technology

Partial Discharge TechnologyA lot of computer-based evaluation functions are available.

Partial Discharge TechnologyA lot of statistic and diagnosis tools are available.

Partial Discharge TechnologyOptional extension by: PD Fault Location Control panels Customer specific templates

Partial Discharge TechnologyDifferential LEMKE PROBE LDP-5 for on-site and laboratory PD diagnosis testsUsing of capacitive or inductive field coupling modeLDP-5

Partial Discharge TechnologyUltrasonic PD Sensor for detection of partial discharges by using acoustic emissionUHF/VHF-Converter for on-site PD detection on power cable accessories under life condition (can be adopted to the LDP-5)Location of external and internal PD sources by different ultrasonic receivers

Partial Discharge TechnologyPD detectors for standardized measurements acc. to IEC270 for quality tests on HV equipment and fundamental PD studies in research and educationPD Noise Impulse Comparator for elimination of pulse shaped noise signals

Partial Discharge TechnologyAdditional accessories for PD measuring circuits, like Measuring Impedance Bridge Impedance Noise Reduction Filter Multiplexer

Partial Discharge TechnologyCalibrators for calibrating of PD measuring circuits, like Calibrator Charge Injector Reference Calibrator and Pulse Integrator

Partial Discharge TechnologyOn-line calibrating system for calibrating of PD measuring circuits under test voltage

Partial Discharge TechnologyComputer-aided PD measuring system for measuring, recording and analysis of PD pulses

Partial Discharge TechnologyPD Warning Device LDWD-6for Continuous PD Monitoring of High Voltage Systems

Partial Discharge TechnologyPD Warning Device LDWD-6 for high sensitive monitoring of PD faults in three-phase high voltage power apparatus outdoor-useable measuring equipment built-in multiplexing unit for phase selection built-in gating unit for noise suppression extensive alarm functions computer-aided monitoring and evaluation unit with user-friendly high-sophisticated software remote controllable

Partial Discharge TechnologyDirectional Coupler Measuring System LDY-724 (DCD) for high sensitive location of PD faults in high and extra high voltage cable accessories (joints, terminations)

Partial Discharge Technology Signal decoupling by Directional Coupler Sensors Sensors remain in the cable accessory Permanent or sequential PD monitoring possible For after laying and installation tests, also on-site For type-, acceptance- and development tests of prefabricated cable accessories and components

Partial Discharge TechnologyPower Cable Test System CDA-50

Partial Discharge Technology Non-destructive cable assessmentThe Power Cable Test System CDA-50 is designed for PD fault location PD fault exposure Service life predictionThe system bases on the characteristic CDA test voltage.

Partial Discharge Technology Low voltage stressBenefits of CDA testing: Short test duration Low power demand Low weight Location of PD faults Cost-benefit test procedure

Partial Discharge TechnologyHigh voltage module for CDA testing of medium voltage power cables, equipped in a van

Partial Discharge TechnologyCompletely computer-aided controlling, measuring & evaluation

Partial Discharge TechnologyThis is the result of the CDA testing: The PD Fault Position Map

Capacitance and Loss Factor Measuring Technology

Capacitance and Loss Factor Measuring Technology Dissipation factor (tan d)The DSP-based Dissipation Factor and Capacitance Measuring System LDV-5 is suitable for high precision measurements of: Capacitance CX Test voltage Frequency Test specimen currents Power factor many other parameter

Capacitance and Loss Factor Measuring Technology Using advanced digital signal processing (DSP) hardwareMain features of the LDV-5 are: Using potential-free measuring sensors Using fully automatic measuring procedure in the frequency range between 10 and 400 Hz Using integrated PC for data storage and file transfer Individual setup possibilities

Capacitance and Loss Factor Measuring Technology

Capacitance and Loss Factor Measuring TechnologyProtocol sheet like an EXCEL spreadsheet

Capacitance and Loss Factor Measuring TechnologyDifferent evaluation procedures help to get the best information about the state of the tested insulation.

Capacitance and Loss Factor Measuring TechnologyCustomer specific evaluation templates, based on EXCEL spreadsheets with general parameter, tables, diagrams, logos and comments

Capacitance and Loss Factor Measuring Technology Dissipation factor (tan d)The Dielectric Analyzer DIANA is suitable for laboratory measurements of: Capacitance CX Occurrence of partial discharges

Capacitance and Loss Factor Measuring TechnologyThe test cells can be used together with DSP-based Dissipation Factor and Capacitance Measuring System LDV-5 or Dielectric Analyzer DIANA for measurements of liquid and solid dielectric materials.

Complete High Voltage Test SystemsCustomer specific test systems for different applications, like surge arresters switchgears

Complete High Voltage Test SystemsAutomatic HV and PD measuring systems for testing of bushings for SF6 switchgears

Performances of our DKD Calibration LaboratoryLEMKE DIAGNOSTICS GmbH is certificated as an official DKD Calibration Laboratory by the Physikalisch-Technische Bundesanstalt (PTB).We are able to calibrate in the ranges of: Impulse charges PD measuring technique Time parameter

Performances of our DKD Calibration LaboratoryReference calibration unit

Our companyLEMKE DIAGNOSTICS GmbHRadeburger Str. 4701468 Volkersdorf / DresdenGermany

MANY THANKS FOR YOUR ATTENTION ! 2000 by LEMKE DIAGNOSTICS GmbH, Germany