NORD Drivesystems BU0505 - Manual (Page 13)

1 General
BU 0505 GB-1013 13
1.4.1 Explanation of labels used
DANGER
Indicates an immediate danger, which may result in death or serious injury.
WARNING Indicates a possibly dangerous situation, which may result in death or
serious injury.
CAUTION Indicates a possibly dangerous situation, which may result in slight or
minor injuries.
NOTICE Indicates a possibly harmful situation, which may cause damage to the
product or the environment.
Note
Indicates hints for use and useful information.
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1.4.2 List of Safety and installation information
DANGER Danger of electric shock
The frequency inverter operates with a dangerous voltage. Touching certain conducting components (connection
terminals, contact rails and supply cables as well as the PCBs) will cause electric shock with possibly fatal
consequences.
Even when the motor is at a standstill (e.g. caused by an electronic block, blocked drive or output terminal short-
circuit), the line connection terminals, motor terminals and braking resistor terminals, contact rails, PCBs and
supply cables may still conduct hazardous voltages. A motor standstill is not identical to electrical isolation from
the mains.
Only carry out installations and work if the device is disconnected from the voltage and wait at least 5
minutes after the mains have been switched off! (The equipment may continue to carry hazardous voltages for
up to 5 minutes after being switched off at the mains).
Follow the 5 Safety Rules (1. Switch off the power, 2. Secure against switching on, 3, Check for no voltage, 4.
Earth and short circuit, 5. Cover or fence off neighbouring live components).
DANGER Danger of electric shock
Even if the drive unit has been disconnected from the mains, a connected motor may rotate and possible
generate a dangerous voltage. Touching electrically conducting components may then cause an electric shock
with possible fatal consequences.
Therefore prevent connected motors from rotating.
WARNING Danger of electric shock
The voltage supply of the frequency inverter may directly or indirectly put it into operation, or touching electrically
conducting components may then cause an electric shock with possible fatal consequences.
Therefore, all poles of the voltage supply must be disconnected. For devices with a 3-phase supply,
L1 / L2 / L3 must be disconnected. For devices with a single phase supply, L1 / N must be disconnected. For
devices with a DC supply, –DC / +B must be disconnected. Also, the motor cables U / V / W must be
disconnected.