Working at electrical parts

1. Working at electrical parts You can distinguish three methods of working: Working with zero voltage Live working Working near energized parts. All methods postulate effective safety measures against electrical shock, arcing faults and effects of short circuit

2. Working with zero voltage

3. Working with zero voltage 1. Safety regulation: Isolate To isolate means the disconnection of ring main units, a feeder or a switchgear allover. Every cable guiding voltage to the working place ist to be disconnected. Make safe distance! Use personal safety clothes Swithings must be done by right switchgears, like circuit breakers or disconnectors. Change HRC- fuses loaf-free, better with zero voltage.

4. Working with zero voltage Safety regulation 1: isolate

5. Working with zero voltage Switching at a MV-switchgear Making of a visible disconnection by removing the HRC-fuse load free Safety regulation 1: isolate

6. Working with zero voltage On the left side: old and dangerous switching rod and fuse-tongs On the right side: new , safe ones

7. Working with zero voltage Mounting and dismounting of NRC-fuses in open distributions may be done only with a special fuse-puller with sheath. Wear a helmet with a face shield. Safety regulation 1: isolate

8. Working with zero voltage Safety regulation 2: Prevent re-connection Special labels for a MV-switchgear (right side) and for LV fuse switch disconnector (left side)

9. Working with zero voltage LV blocking devices for screw-locking-fuses, LRC-fuses and automatic circuit breaker

10. Working with zero voltage Voltage testers up to bis 1 000 Volt are normally designed with two phase-poles. Voltage detection takes place either with a glow-lamp, with LED or with a volt-meter. Voltage tester according to regulation up to 1000 V, a: with glow lamp and moving coil meter b: with glow lamp and moving iron meter c: with LED and integrated functional check Don´t use for zero-voltage detection! Safety regulation 3: control zero-voltage

11. Working with zero voltage Safety regulation 3: control zero-voltage

12. Working with zero voltage Left hand: old and dangerous zero-voltage detektors (no integrated functional check Right hand: new, battery operated safe ones

13. Working with zero voltage Safety regulation 3: control zero-voltage

14. Working with zero voltage Detector according to DIN VDE 0682, System HO Zero-voltage detection at capsulated switchgears Safety regulation 3: control zero-voltage

15. Working with zero voltage Capacitiv voltage detction system Safety regulation 3: control zero-voltage

16. Working with zero voltage Safety regulation 3: control zero-voltage Old, pyrotechnical cable cutter (left above), hydraulic safety cable cutter

17. Working with zero voltage Safety regulation 4: ground and short circuit

18. Working with zero voltage above: old grounding device (not according to the rules) below: new one, due to the rules Safety regulation 4: ground and short circuit

19. Working with zero voltage Connectet grounding and short circuit devive in a ring cable feeder

20. Working with zero voltage Griunding- and short circuit devices for overheadtransmission line (LV and HV)

21. Working with zero voltage Grounding and short circuit device in aLV distribution

22. Working with zero voltage Insulating slider in a MV substation Safety regulation 5: cover or remove nearby live parts

23. Working with zero voltage Safety regulation 5: cover or remove nearby live parts

24. Working with zero voltage Protection in a a HV-substation

25. Working with zero voltage Protective cover in a LV cable distribution cabinet

26. Working with zero voltage Overhead transmission lines LV Safety regulation 5: cover or remove nearby live parts

27. Working with zero voltage Special covering parts for LV overhead transmission lines Safety regulation 5: cover or remove nearby live parts

28. Working with zero voltage • Typesoffuses: • Diazed-fusewithadapterscrew (Typ D) • Neozed-fusewithadapter ring (Typ DO) • NRC-fuse

29. Working with zero voltage Current limitation for safe replacement of energized fuses up to 1000 V

30. Working with zero voltage Fuse switch disconnector Replacement of fuses with personal safety clothes (LV)

31. Live working Working on safe distance Cleaning of a transformer Working with insulating gloves Assembly of connection joint (LV) Working on high potential Posting of a MV overhead transmission line

32. Live working Instruction for live working

33. Live working Labeling and keeping of special tools for live working

34. Live working Insulating gloves

35. Live working Insulation protective clothes Insulation rubber-boots

36. Live working Helmet with face-shield Safety-handlefor LRC-fuses Special tools and personal protection clothes

37. Live working Personal protection clothes

38. Live working Special tools

39. Live working Insulating mates Protection tools for live working

40. Live working (LV) Cutting of cables, Assembly of termination joints, Assembly of voltage resistant termination joints, Assembly of service boxes with clamp rings Assembly of connection joints, Assembly of transition joints, Connect and disconnect cables at service entrance boxes and cable distribution cabinets Replacement of service boxes Change of LRV-fuses, Replacement of connecting blocks, Replacement of cable distributin cabinets

41. Live working Working with distance

42. Live working Fill-up of insulation mass Open the fill-up screw Refilling of an paper-insulated cable Working with distance

43. Live working Assembly of a cable joint Assembly of a T- joint with clamp ring Working with insulting gloves

44. Live working Live working (high voltage)