ABB REB500 Operation Manual page 7

Safety information
The busbar protection system REB500 corresponds to the latest practices and
guidelines and complies with the recognized safety rules. Nevertheless, care must
always be taken to avoid danger.
Only use the busbar protection system when it is in perfect working order and in
strict accordance with these operating instructions.
Dangerous situations can arise if the equipment is used improperly, especially if
the user changes the configuration.
Live electrical equipment is in the immediate vicinity of REB500.
Before working on the system, always ensure that it is impossible to
come into contact with, or even close to live parts.
The busbar protection system REB500 can initiate operation of
items of electrical plant (circuit-breakers and isolators). Before
working on the equipment, always ensure that unwanted operation
is inhibited or has no effect on persons or plant.
Strictly observe all safety precautions (interlocks, locks and
blocking devices), especially those issued for the specific station.
Only properly authorized, professionally qualified and
correspondingly trained personnel, who have also read and
understood the operating instructions, may work on the system.
Dangerous voltages can occur on the connectors, even though the
auxiliary voltage has been disconnected.
Non-observance can result in death, personal injury or substantial
property damage.
Only a competent electrician is allowed to carry out the electrical
installation.