3.5.8 Brake Cable for Frequency Converters
with Factory Installed Brake Chopper
Option
(Only standard with letter B in position 18 of typecode).
The connection cable to the brake resistor must be
screened and the max. length from frequency converter to
the DC bar is limited to 25 m (82 ft).
Terminal No.
Function
81, 82
Brake resistor terminals
Table 3.21 Terminals for Brake Resistor
The connection cable to the brake resistor must be
screened. Connect the screen with cable clamps to the
conductive back plate at the frequency converter and to
the metal cabinet of the brake resistor.
Size the brake cable cross-section to match the brake
torque. See also the instructions
Brake Resistor
and
Brake
Resistors for Horizontal Applications
for further information
regarding safe installation.
WARNING
Note that voltages up to 1099 V DC, depending on the
supply voltage, may occur on the terminals.
F enclosure requirements
The brake resistor(s) must be connected to the brake
terminals in each inverter module.
3.5.9 Load Sharing
Terminal No.
Function
88, 89
Loadsharing
Table 3.22 Terminals for Load Sharing
The connection cable must be screened and the max.
length from the frequency converter to the DC bar is
limited to 25 m (82 ft).
Load sharing enables linking of the DC intermediate
circuits of several frequency converters.
WARNING
Voltages up to 1099 V DC may occur on the terminals.
Load Sharing calls for extra equipment and safety
considerations. For further information, see the
instuctions
Load Sharing
.
WARNING
Mains disconnect may not isolate the frequency
converter due to DC-link connection.
3.5.10 Shielding against Electrical Noise
Before mounting the mains power cable, mount the EMC
metal cover to ensure best EMC performance.
NOTICE
The EMC metal cover is only included in units with an
RFI filter.
175ZT975.10
Illustration 3.64 Mounting of EMC Shield.
3.5.11 Mains Connection
Mains must be connected to terminals 91, 92 and 93. Earth
is connected to the terminal to the right of terminal 93.
Terminal No.
Function
91, 92, 93
94
Mains R/L1, S/L2, T/L3
Earth
Table 3.23 Mains Terminals Connection
CAUTION
Check the name plate to ensure that the mains voltage
of the frequency converter matches the power supply of
the plant.
Ensure that the power supply can supply the necessary
current to the frequency converter.
If the unit is without built-in fuses, ensure that the
appropriate fuses have the correct current rating.
How to Install
VLT
®
Automation Drive FC 300 Operating Instructions
56
MG33U402 - Rev. 2013-12-16
3
3
Summary of Contents for VLT AutomationDrive FC 302
Page 2: ......
