Folie 1

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
Dont 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

• Types of fuses
• Diazed-fuse with adapter screw (Typ D)
• Neozed-fuse with adapter 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)