Related Manuals for Nortech F10
Summary of Contents for Nortech F10
- Page 1 Earth Fault Indicator USER MANUAL Version 1.2 © Nortech Management Ltd, United Kingdom May 2013 www.nortechonline.co.uk Doc ref: D_000800...
- Page 2 Earth Fault Indicator Publication Notice Copyright © Nortech Management Limited (NML). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, including photocopying, electronic, mechanical, recording or otherwise, without the prior written permission of the copyright holder.
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Page 3: Table Of Contents
Technical Assistance ..............13 Simple Test................13 Primary Injection ............... 13 Replace battery ................. 13 Recycling .................. 13 Specification ................... 14 General ..................14 EMC ..................14 Environmental ................15 Notices ..................16 © Nortech Management Ltd, United Kingdom Page 3 of 16... -
Page 4: Description
DC reset signal or on restoration of AC supplies. The F10 indicator is available for use with either a core balance CT or three phase CTs. A lithium battery provides power to the unit. The battery will provide up to 20 years life between changes. -
Page 5: Operation
The default value is 3 hours flashing when a fault is detected. Different indication periods may be selected to suit local requirements either at time of order or in the field using a laptop and the F10 Field Support Kit. Reset... -
Page 6: Test
Earth Fault Indicator Test A simple manual test of the F10 is achieved by pressing the TEST button. When pressed the LED will flash, however the output contacts will not operate. This simple test proves the processor, LED, test button and battery are healthy. -
Page 7: Operation Worked Examples
The examples below illustrate how applying electrical reset can affect detection and indication of faults. The examples assume the F10 is configured with a 3 hour indication period. The three faults occur at 2 hour intervals. After Fault 1 supplies are lost for 1 hour. -
Page 8: Indication With Dc Reset Signal
Fault 2 Fault 3 fault current time DC reset signal In all cases RTU sends DC reset signal as soon as F10 indication is detected. F10 time resets within 1 second of DC reset signal LED indication and relay contacts... -
Page 9: Installation
The LED and buttons are located on the front of the F10. The F10 should be mounted for good visibility and as close as practical to the CT earthing For safety reasons, it is normal practice for the CT to be mounted in a position over the cable sheath or screening tape, and in accordance with local safety regulations. -
Page 10: Ct Connections
Earth Fault Indicator CT connections The CT arrangement the F10 will be used with is a factory set option. Wire the summated output from the CT secondary’s to the CT terminals of the F10. Wire the output from the CT secondary The current transformers should be to the CT terminals of the F10. -
Page 11: Wiring Connections
Earth Fault Indicator Wiring connections F10 wiring connections are provided as screw terminals inside the lid of the enclosure. If mounted within a cable termination enclosure, one core of the CT should be connected to earth for safety. CT connections Connect CT secondary output to terminals 1 &... -
Page 12: Enclosure Mounting
Earth Fault Indicator Enclosure Mounting The enclosure has four 4mm fixing holes suitable for use mounting the F10 on a wall or switchgear bracket. Enclosure drillings and cable entry glands can be provided if required. Mounting brackets are available from Nortech on request. -
Page 13: Maintenance
In case of mal function contact Nortech. Simple Test Press the TEST button on the front of the F10. The LED will start to flash. The relay contacts will not operate. Release the button and the LED will stop flashing. -
Page 14: Specification
DC Remote Reset 12V-24V dc for 500ms AC Remote Reset 110V-230V ac for 10 seconds The F10 indicator has been designed and tested for compliance accordance with the high level standard 61326-1:2006. The class tested to was Industrial. Immunity IEC61000-4-2... -
Page 15: Environmental
Battery: -60 to +85 degrees C. Storage: In addition to the above environmental considerations, the F10 should be stored in an environment that is dry, corrosive-free, and not in direct sunlight. Correct storage: Prevents premature component failures caused by environmental factors such as moisture or corrosive gases. -
Page 16: Notices
Isolate from mains before removing cover (only where 100-240V AC connected by 50-60Hz user) 100mA rated current Disposal Battery and F10 unit should be disposed of in accordance with local regulations. © Nortech Management Ltd, United Kingdom Page 16 of 16...