2 Mounting and installation
BU 0750 GB Technical design subject to change 19
2.8 Electrical connection
THESE DEVICES MUST BE EARTHED.
For the device to work safely and reliably, it must have been installed and put into operation by
qualified personnel in a workmanlike manner, with all of the instructions mentioned in the present
Operating Manual being followed as specified.
In particular both the generally and locally applicable installation and safety regulations for work on
power installations (e.g. VDE) and the regulations concerning the professional use of tools and the
use of any equipment for personal protection must be observed.
The mains input and the motor connecting terminals may be dangerously live even if the inverter is out of
operation. Always use insulated screwdrivers in these terminal areas.
Make sure that the source of input voltage is disconnected before you establish connections to the
unit or change them.
Make sure that both the frequency inverter and the motor are rated to match the connecting voltage.
Switching the feed line of motor or brake resistance is not allowed under voltage!
2.9 Electrical connection of the power section
The supply, motor, brake resistor, and control terminals are located on the bottom side of the device. To ac-
cess the terminals, the covers (plate and grille) must be removed. Now the connection terminals are accessi-
ble from the front/from below. The cables introduced into the frequency inverter must be fitted with appropriate
clamp screws and pull relief provisions. Before the supply voltage is switched on, all covers must be reat-
tached!
Power supply
connection
a) 3 ~ 220-240V ~
b) 3 ~ 380-480V ~
c) 3 ~ 460/480V ~
Brake resistor
(chopper)
connection
R 15-40Ω,
details in
chap. 9.2/9.3
3 ~ Motor
connection
delta / star
Electro-
magnetic
brake
connection
a) 105V =
b) 180V =
c) 205V =
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