
SD750K
POWER ELECTRONICS
46
POWER CONNECTION
EN
CAUTION
Line voltage (input supply) must never be connected to U, V and W terminals.
Otherwise, the drive
will be damaged.
Line voltage L1, L2 and L3 terminals, and earth will be connected to the terminals assigned for this
function. Motor should be connected to the terminals indicated as U, V and W.
Terminals HVDC+ and HVDC- are used to connect a dynamic braking unit if the
application requires it.
As standard, the input and output terminals are made of tin plated copper. If they are
oxidized prior to its installation, the connections will be poorly executed and will cause
overheating. To avoid this effect is recommended to follow the next steps.
•
It is recommended to use Ø11 tin plated copper terminal lugs.
•
Use M10 zinc bolts and nuts and apply a torque of 40Nm. Check after the
first week of operation that the torque applied is maintained.
•
The number of busbars depends on the frame size. Check the “Power terminals” section.
•
Before connecting the cables, clean the contact surface with a clean cloth and ethanol
cleaner.
•
Use a pressure washer and a flat washer between the nut or bolt head and the terminal lug.
•
Use copper or aluminum 600Vac conductors for up to 500Vac rated voltage. For 525Vac and
690 Vac phase to phase rated equipment use 1kV conductors.
The recommended cable types and lengths between the drive (with factory settings) and the motor are:
•
Unshielded cable
: 150m. Asymmetrical 4-wire cable including PE conductor. It is
recommended to use a motor ground cable (PE) with a cross section equal or higher than the
supply motor wires cross section (U, V, W). When single-wire cables are used in three-phase
systems, the three phase conductors must be bundled symmetrically.
•
Shielded cable
: 75m. Symmetrical 3-wire cable with PE conductor- with concentric shield. To
implement an effective shield bonding, an EMC cable gland should be used in both the motor
junction box and the drive cabinet to ensure effective 360º ground connection and a low
impedance path for high freq
uency current. Refer to “EMC installation requirements” section.
Summary of Contents for SD750K
Page 1: ...SD750K HARDWARE AND INSTALLATION MANUAL LOW VOLTAGE VARIABLE SPEED DRIVE...
Page 2: ......
Page 59: ...POWER ELECTRONICS SD750K POWER CONNECTION 57 Connections for frame 2...
Page 60: ...SD750K POWER ELECTRONICS 58 POWER CONNECTION EN Connections for frame 3...
Page 61: ...POWER ELECTRONICS SD750K POWER CONNECTION 59 Connections for frame 4...
Page 83: ...POWER ELECTRONICS SD750K INDUCTANCES 81 Dimensions of inductances P246B Inductance...
Page 84: ...SD750K POWER ELECTRONICS 82 INDUCTANCES EN P256A Inductance...
Page 85: ...POWER ELECTRONICS SD750K INDUCTANCES 83 P233A Inductance...
Page 86: ...SD750K POWER ELECTRONICS 84 INDUCTANCES EN P297A Inductance...
Page 87: ...POWER ELECTRONICS SD750K INDUCTANCES 85 P298A Inductance...
Page 88: ...SD750K POWER ELECTRONICS 86 INDUCTANCES EN P316A Inductance...
Page 89: ...POWER ELECTRONICS SD750K INDUCTANCES 87 P317A Inductance...
Page 90: ...SD750K POWER ELECTRONICS 88 INDUCTANCES EN P318A Inductance...
Page 91: ...POWER ELECTRONICS SD750K INDUCTANCES 89 P319A Inductance...
Page 99: ......