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1.5
Safety instructions
Hazardous voltage
Results in death, serious injury or irreparable damage to material / property.
Only qualified personnel who have been instructed in the warnings and safety instructions and
the maintenance rules must ever work on the device.
Successful and safe functioning of this device depends on proper installation, operation,
handling, and maintenance.
Improper installation, commissioning, and maintenance
Safe operation of the circuit breaker can only be ensured if it is installed, commissioned, and
maintained properly by qualified personnel, observing the warnings provided in these
operating instructions.
In particular, both the general installation and safety instructions for work on power-current
installations (e.g. DIN VDE) and the rules prescribing proper use of lifting equipment and tools
and use of personal protective equipment (goggles etc.) must be followed.
If these are not observed, this can result in death, severe injury, or substantial material damage.
Qualified personnel
A qualified person for the purpose of this documentation is a person who is familiar with
assembling, installing, commissioning, and operating the product and who has the relevant
qualifications, such as:
• Training or instruction/authorization to close and open, ground, and tag circuits and devices
and systems according to the safety standards.
• Training / instruction in the proper care and use of protective equipment in accordance with
established safety procedures.
• Training in first aid.
Ambient conditions
The circuit breakers are designed to be operated in enclosed rooms in which the operating
conditions are not affected by dust or corrosive vapors/gases. Suitable enclosures must
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03
DANGER
WARNING
Introduction
1.5 Safety instructions
11
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