Summary of Contents for Megger PD T30/1
- Page 1 High Voltage Filters Installation and User Manual Rev. e1.05 Power Diagnostix Systems GmbH ∙ Vaalser Straße 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com...
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Page 2: Table Of Contents
Power Diagnostix High Voltage Filters Contents Introduction ..............................1 Safety Instructions ............................1 General Installation Instructions ........................3 T-Filters ................................4 IV.1 Introduction .............................. 4 IV.2 Installation ..............................4 IV.3 Operation ..............................5 IV.4 Technical Data ............................6 IV.4.1 T30/x ............................6 IV.4.2 T50/x ............................ - Page 3 Power Diagnostix High Voltage Filters VIII.1 Setup Examples ............................ 13 VIII.1.1 Testing of Stator Bars ......................13 VIII.1.2 Transformer Testing ......................... 13 VIII.2 Technical Drawings (Examples)......................14 ã Copyright 2022 by Power Diagnostix. All rights reserved. No part of the content of this manual may be reproduced or transmitted in any form or by any other means without the written permission of the publisher.
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Page 4: I Introduction
Power Diagnostix High Voltage Filters Introduction Partial Discharge (PD) measurements are conducted in frequency ranges, which are partly covered by radio transmission. Further, impulse noise interference hamper sensitive measurements. Besides using small filters in the acquisition chain, power filters allow removing such disturbance from the high voltage supply. Power Diagnostix offers a range of different high voltage filters for various applications. - Page 5 Power Diagnostix High Voltage Filters When working with instruments and/or accessories under high voltage, a minimum working distance must be kept to prevent physical harm or damage. The following table shows minimum working distances depending on the measuring system voltage according to DIN EN 50110-1. System Voltage Minimum Working Distance <1...
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Page 6: General Installation Instructions
Power Diagnostix High Voltage Filters General installation instructions In order to connect the filter to a high voltage (HV) source and to the device under test, high voltage cables with multi-contact (MC) connectors are needed. Power Diagnostix can provide such connecting cables that are ready to use. -
Page 7: T-Filters
Power Diagnostix High Voltage Filters T-Filters IV.1 Introduction Power Diagnostix's T-filters are designed to reduce high frequent disturbance signals from the high voltage supply. Their main application is induced voltage testing on motors and large power transformers. Their basic structure is a T-filter with a ground capacitor of 10 nF and two coils. The standard filters come with B18N (multi-contact, MC) connectors, but other connectors are available on request. -
Page 8: Iv.3 Operation
Power Diagnostix High Voltage Filters IV.3 Operation Every T-filter is marked with a plaque specifying the voltage and current that the filter can take. U stands for the nominal voltage, while I specifies the maximum current with which the filter can be operated Ncont continuously. -
Page 9: Iv.4 Technical Data
Power Diagnostix High Voltage Filters IV.4 Technical data IV.4.1 T30/x Nominal voltage: See Table 1 Nominal current: See Table 1 Typical frequency range: 0–300 Hz Typical 50Ω-insertion loss: 1000 >60 >60 Connectors: B18N (multi-contact) or other on request Dimensions in mm: T30/1 T30/5 T30/20... -
Page 10: Π-Filters
Power Diagnostix High Voltage Filters π-Filters Introduction π-filters are for testing procedures with voltages up to 2 kV, whereas the T-filters are used for testing with higher voltages. Standard π-filters are available for three-phase and single-phase systems. Special filters for testing of two phases are available on request. -
Page 11: Technical Data
Power Diagnostix High Voltage Filters Technical data V.4.1 All π-filters Nominal voltage: See Table 2 Capacity: 1 µF Rated current: See Table 2 Typical frequency range: 0–300 Hz DC Typical 50Ω-insertion loss: 1000 >60 >60 Dimensions and weight: Model Dimensions Weight (H x W x D, excl. -
Page 12: Line Filters
Power Diagnostix High Voltage Filters Line filters VI.1 Introduction Power Diagnostix' single-phase line filters can reduce disturbance signals from the high voltage supply. This kind of filter is always used in combination with an additional blocking capacitor. As this combination results in a very low background noise it is often used for cable testing. -
Page 13: Vi.3.2 Line Filter Lf450
Power Diagnostix High Voltage Filters VI.3.2 Line filter LF450 Input/output voltage: Max. 500 V AC Max. line current: 450 A AC Connectors: B18N (multi-contact) Inductance: Approx. 0.5 mH Dimensions: 512 x 450 x 450 mm³ (H x W x D, excl. connectors) Weight: Approx. -
Page 14: Ground Filters
Power Diagnostix High Voltage Filters Ground filters VII.1 Introduction Partial discharge (PD) measurement requires a reasonable noise-free environment. Power Diagnostix‘ ground filters are designed to reduce high frequent disturbance signals from the ground leads. It can be used for HF separation of the test specimen from the ground potential of the power supply or other HV equipment within the environment without influencing the power frequency. -
Page 15: Vii.3 Technical Data
Power Diagnostix High Voltage Filters The following diagram shows a possible test setup with a GF50. Figure VII.2: Connections of an example test setup with coupling capacitor and ground filter Warning: The GF50 must not be installed in a low impedance grounding providing the protective earth for measurement equipment that may be touched by humans in the test bay. -
Page 16: Viii Appendix
Power Diagnostix High Voltage Filters VIII Appendix VIII.1 Setup examples VIII.1.1 Testing of stator bars A test setup with the ground filter installed between the ground connection of the inverter control and the main grounding is safe for the personnel. Please note that with this setup disturbance signals from the main grounding are not filtered;... - Page 17 Power Diagnostix High Voltage Filters VIII.2 Technical drawings (examples) Power Diagnostix Systems GmbH ∙ Vaalser Straße 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com...
- Page 18 Power Diagnostix High Voltage Filters Power Diagnostix Systems GmbH ∙ Vaalser Straße 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com...
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