Power Electronics SD700SP Series, Hardware And Installation Manual

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SD700SP POWER ELECTRONICS
30
POWER CONNECTION
AC TERMINALS (L1-L2-L3) DC TERMINALS (
HVDC+ ,HVDC-)
•
It is recommended to use Ø11 tin plated
aluminium or coper terminal lugs.
•
It is recommended to use Ø9 tin plated aluminium
or 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.
•
Use M8 zinc bolts and nuts and apply a torque of
25Nm. Check after the first week of operation that
the torque applied is maintained.
•
The number of available terminals depends on the frame size. Check the power terminal section.
•
Before connecting the cables, clean the contact surfaces with a clean cloth and ethanol cleaner.
•
Use a spring washer and a fender washer between the nuts or bolts head and the busbar or terminal lug.
•
Use copper or aluminium 600Vac conductors
for up to 500Vac rated voltage.
•
Use copper or aluminium 1 KV conductors suitable
for solar installations.
The recommended cable types and lengths between the drive (at factory settings) and the motor are:
▪
Unshielded cable : 300m. Asymmetrical 4-wire including PE conductor. It is recommended to use
a motor ground cable (PE) cross section equal or higher than active 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 : 150m. Ideal symmetrical 3-wire cable plus symmetrically arranged PE
conductor- with concentric shield. To implement an effective shield bonding it could be used an
EMC gland in both motor terminal box and drive cabinet to ensure effective 360º ground
connection and a low high frequency impedance path. Check the EMC recommendations section.
CAUTION
The number of three phase cable hose (U,V,W, PE) to the motor should be equal to the number of
IGBT’s in the drive, being one cable hose by each IGBT’s Block.
The following figures show the recommended cable type and bundling.