
4 Operation
4.2 Operational warnings
DB1 variable frequency drive
11/20 MN040031EN
Eaton.com
83
4.2 Operational warnings
Please observe the following notes.
DANGER
Commissioning must only be completed by qualified technicians.
DANGER
Dangerous electrical voltage!
The safety instructions on pages I and II must be followed.
DANGER
The components in the variable frequency drive’s power section
are energized if the supply voltage (mains voltage) is connected.
For instance: the L1/L, L2/N, L3, DC+, BR, U/T1, V/T2, W/T3
power terminals.
The control signal terminals are isolated from the line power
potential.
There can be a dangerous voltage on the relay terminals even if
the variable frequency drive is not connected to the mains vol-
tage (e.g. when installing relay contacts in control systems with
voltage > 48 V AC / 60 V DC).
DANGER
The components in the variable frequency drive’s power section
remain energized up to five (5) minutes after the supply voltage
has been switched off (internal DC link capacitor discharging
time).
Pay attention to hazard warnings!
DANGER
Following a shutdown (fault, mains voltage off), the motor may
start automatically (when the mains voltage is switched back
on) if the automatic restart function has been enabled
(
→
parameters P-31).