NORD Drivesystems BU0180 - Manual (Page 33)

2 Assembly and installation
BU 0180 GB-0914 Pre-series version 33
2.7.3 Brake resistor connection (-B, +B) (only size 2)
The terminals +B/ -B are intended for the connection of a suitable braking resistor (only size 2).
The connection should be as short as possible.
Connection cross-section:
0.2 ... 4/6mm
2
rigid/ flexible cable
AWG 24-10
Starting torque:
0.5 ... 0.6 Nm
Note: The great production of heat in
the braking resistor must be
taken into account.
2.7.4 Mains supply jumpers
These jumpers are used to adapt the
frequency inverter to various types of
networks (e.g. IT network). As delivered, the
jumpers are plugged in the "normal position"
(C
Y
=ON) and are to be used in a network
which is earthed at the star point, with a
neutral conductor for single phase devices!
To adapt the frequency inverter to an IT
network (only size 2 in combination with a
brake resistor), the capacitors C
y
must be
disconnected from the PE. This is carried out
by changing a jumper position as shown in
the diagram.
Here it must be noted that the specified degree of radio interference suppression changes. Further details
can be found in Section 9.3 EMC.
Jumper on the left side (C
Y
capacitors, link circuit PE):
C
Y
=OFF: C
Y
=ON:
(default)
Jumper on the right side (C
Y
capacitors, link circuit PE):
C
Y
=OFF: C
Y
=ON:
(default)
B+,
B-