Power Electronics SD750FR, Hardware And Installation Manual

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POWER ELECTRONICS SD750FR
POWER CONNECTION
47
It is recommended to use shielded cable for control signals and to follow recommendations included in
section
“Wiring recommendations”.
CAUTION
Select communication and control system according to the drive EMC environment. Otherwise,
systems could suffer from interferences due to a low EMS level.
Protections
Short circuit
The SD750FR includes from frame 5 to 8 ultra-fast input protection fuses as standard. Frame 5 includes
one fuse per phase with a rated current that depends on the drive’s nominal current. From frame 6
upwards, the fuses per phase depend on the number of modules (frame 5) interconnected. The main
characteristics of these fuses are shown in the following table.
FUSE CHARACTERISTICS
In (A)
Ic @ Un
(A)
I 2 t @
1ms I
2
t
p
(A²s)
I
2
t @ Un
(A²s)
Un (V) Manufacturer Model
250A 200kA 4700 25000 690VAC WESTCODE 069UR1S0250B
350A 200kA 10500 55000 690VAC WESTCODE 069UR1S0350B
However, it is not recommended to install the drive at points where the short-circuit current available is
higher than 200kA. If necessary, install general fuses with a greater breaking capacity and with fastest
overcurrent capacity.