F10
Earth Fault Indicator
© Nortech Management Ltd, United Kingdom
Contents
1 Description ....................................................................................... 4
2 Operation ......................................................................................... 5
2.1 Local Indication ........................................................................... 5
2.2 Indication Period ......................................................................... 5
2.3 Reset ......................................................................................... 5
2.4 Current Transformers ................................................................... 5
2.5 Sensitivity .................................................................................. 5
2.6 Test ........................................................................................... 6
3 Operation worked examples ............................................................... 7
3.1 Indication with no electrical reset .................................................. 7
3.2 Indication with AC reset signal ...................................................... 7
3.3 Indication with DC reset signal ...................................................... 8
4 Installation ....................................................................................... 9
4.1 Physical ...................................................................................... 9
4.2 CT earthing ................................................................................. 9
4.3 CT connections .......................................................................... 10
4.4 Wiring connections .................................................................... 11
4.5 Enclosure Mounting .................................................................... 12
5 Maintenance ................................................................................... 13
5.1 Technical Assistance .................................................................. 13
5.2 Simple Test............................................................................... 13
5.3 Primary Injection ....................................................................... 13
5.4 Replace battery ......................................................................... 13
5.5 Recycling .................................................................................. 13
6 Specification ................................................................................... 14
6.1 General .................................................................................... 14
6.2 EMC ......................................................................................... 14
6.3 Environmental ........................................................................... 15
7 Notices .......................................................................................... 16
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