Bosch PST 6000 Series Technical Information page 16

Safety instructions
1-10
DANGEROUS ELECTRICAL VOLTAGE
Danger of life through insufficient protective conductor system!
The thyristor power units must be connected to the protective earth-
ing (PE) circuit of the system. Please ensure that the cross-sectional
area of cables used for protective conductor wiring is sufficiently
large. The electrical continuity of the protective earthing circuit must
be verified in accordance with EN 60204 Part 1.
DANGEROUS ELECTRICAL VOLTAGE
Thyristor power units may be operated in earth neutral systems only.
Protective grounding is the only protective measure permitted as per
EN 50 178 (DIN VDE 0160)!
DANGEROUS ELECTRICAL VOLTAGE
Operation in unbalanced networks (only one network phase
grounded) is not permitted.
Note: It is recommended that the whole welding system be operated
.
within a separate welding power network.
CAUTION
Connecting lines and signal lines must be laid so as to avoid nega-
tive effects on the function of the units through capacitive or induc-
tive interference!
Interference is frequently coupled and de-coupled in long cables.
Therefore, thyristor power unit cables and control cables must be
routed separately. The influence of interfering cables on cables sus-
ceptible to interference can be minimized by keeping the following
distances:
D > 100 mm if cables are run in parallel for < 10 m,
D > 250 mm if cables are run in parallel for > 10 m.
The thyristor power unit should be mounted close to the welding
systems so as to avoid cable lengths of more than 25 m.
CAUTION
Connection cables may come off and apply dangerous voltage to
system components!
It is crucial that cables are properly fixed.
1070 080 058-101 (2001.04) GB