| Document Contents |
| ENA DOC 014-2006 NATIONAL LOW VOLTAGE ELECTRICITY NETWORK ELECTRICAL PROTECTION GUIDELINE |
| PREFACE |
| CONTENTS |
| 1 OBJECTIVES |
| 2 SCOPE |
| 3 REFERENCES |
| 4 DEFINITIONS |
| 5 DESIGN AND CONSTRUCTION |
| 5.1 Principle |
| 5.2 Overhead lines |
| 5.2.1 General |
| 5.2.2 Overhead network distributors |
| 5.2.3 Overhead service conductors |
| 5.2.4 Special circuits |
| 5.2.5 Conductive hardware below 2.4 metres |
| 5.3 Underground cables |
| 5.3.1 General |
| 5.3.2 Underground service conductors |
| 5.3.3 Special circuits |
| 5.3.4 Conductive hardware below 2.4 metres |
| 5.4 Direct distributors |
| 5.4.1 General |
| 5.5 Overvoltage and undervoltage protection |
| 5.5.1 General |
| 5.5.2 Sustained overvoltages or undervoltages |
| 5.5.3 Lightning |
| 5.5.4 HV contacting LV |
| 5.5.5 Step and touch potentials |
| 5.6 Fault levels |
| 5.7 Backup protection |
| 5.8 Special situations |
| 5.8.1 Fuel storage/hazardous areas |
| 5.9 Telecommunications infrastructure (shared use of assets) |
| 6 OPERATING THE ELECTRICITY NETWORK |
| 6.1 Paralleling of LV circuits |
| 6.2 Temporary uprating of protective devices |
| 7 MAINTENANCE OF EQUIPMENT |
| 7.1 General |
| 7.1.1 Protective devices and related equipment on the LV electricity network requiring ma... |
| 7.1.2 Schedule of maintenance activities and maintenance program |
| 8 RATING OF EQUIPMENT |
| 8.1 Fuses |
| 8.2 Circuit°breakers |
| 9 EMBEDDED GENERATION |
| 9.1 General |
| 9.2 Generation connected in parallel to the network |
| 9.2.1 General |
| 9.2.2 Equipment connected via an inverter |
| 9.3 Standby generation |
| 10 CONTINUITY AND EARTHING |
| 10.1 Neutral continuity and earthing |
| 10.2 Installation |
| 10.3 Maintenance |
| APPENDIX A - LINE FUSING |
| A1 RESIDUAL CURRENT PROTECTION |
| A2 LV DISTRIBUTOR |
| APPENDIX B - DESIGN REQUIREMENTS TO ACHIEVE ARCING FAULT PROTECTION OF LARGE DIRECT CABLE... |
| B1 GENERAL |
| B2 PREAMBLE |
| B3 THE CUSTOMER'S SWITCHBOARD |
| B4 THE NATURE OF LV ARCING FAULTS |
| B5 THE MINIMUM FAULT LEVEL |
| B6 ADDITIONAL PROTECTION |
| B7 ARC FAULT CONTAINMENT |
| B8 FUSES AND CIRCUIT-BREAKER CONSIDERATIONS |
| B9 EARTH FAULT PROTECTION REQUIREMENTS |
| B10 SUBSTATION LV SWITCHBOARDS |
