Accessories/coupler and sensors:UHF-PD Sensor Drain Valve

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Accessories/coupler and sensors:UHF-PD Sensor Drain Valve

Product catalog summary

Applications

Designed for UHF-Partial Discharge Measurement on transformers, specifically for decoupling electromagnetic PD signals from oil-paper insulated transformers.
Supports performance and sensitivity checks through high-frequency test pulses.
Grounded sensors suitable for low frequencies, installed at drain valves typically used for oil filling.
Standard designs available for DN 50 or DN 80 drain valves, with custom designs on request.
Developed in collaboration with the Institute of Power Transmission and High-Voltage Technology at the University of Stuttgart, Germany.

Benefits

Easy installation without requiring transformer outage.
Shielded against external noise by the transformer tank.
Suitable for permanent PD monitoring.

Specifications

Operates in the ultrahigh frequency range of 200 MHz to 1 GHz.
Leak-tightness tested for oil temperatures up to 120 °C at 5 bar pressure.
Sealing material: Viton® (FKM); Insulation material: PA GF 30.
Recommended load impedance: 50 Ohm.
Flange sizes: DN50/DN80, with other designs available on request.
Maximum slide-in length: 450 mm; Weight: approximately 3 kg (6.61 lbs).

Accessories

Compatible with PD Measuring Systems such as PD-Smart-UHF or LDS-6/UHF and PD Monitoring Device PD-Guard/UHF.
Includes a carry case for safe transportation and a UHF Pulse generator LDC-7/UHF.

Contact Information

Doble Lemke GmbH, Zschoner Ring 9, 01723 Kesselsdorf / Dresden, Germany.
Doble Lemke AG, Kaiserstrasse 9, 4310 Rheinfelden, Switzerland.
Website: www.doble-lemke.eu

Catalog excerpts

Accessories/coupler and sensors:UHF-PD Sensor Drain Valve-1

UHF-PD Sensor Drain Valve Applications Application: UHF-Partial Discharge Measurement on Transformers » For decoupling of electromagnetic PD signals from the inner of an oilpaper insulated transformers » Sensors support "Performance/Sensitivity Check" (High frequent test pulse can be injected by further integrated electrodes) » Grounded sensors (for low frequencies) » Sensor set-up at drain valves (e.g. normally used for oil filling) » Standard design for DN 50 or DN 80 drain valves » Further designs and dimensions on request » Development in cooperation with Institute of Power Transmission and High-Voltage Technology (IEH) at the University of Stuttgart (Germany) Benefits » Easy-installable sensor » No outage needed for installation » Shielded against external noise by the transformer tank » suitable for PD monitoring (permanently installed) Specifications » Signal decoupling in ultrahigh frequency range: 200 MHz – 1 GHz » Leak-tightness tested for oil temperature 120 °C at 5 bar pressure » Sealing: Viton® (FKM) » Insulation material: PA GF 30 » Recommended load impedance: 50 Ohm » Flange: DN50/DN80 (other designs on request) » Maximum slide-in: 450 mm » Weight: approx. 3 kg (6.61 lbs) Instruments: » PD Measuring System PD-Smart-UHF or LDS-6/UHF » PD Monitoring Device PD-Guard/UHF Further accessories: 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

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Accessories/coupler and sensors:UHF-PD Sensor Drain Valve-2

UHF-PD Sensor Drain Valve » Carry case for easy and safe transportation » UHF Pulse generator LDC-7/UHF 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

Open the catalog to page 2

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