WEG SSW7000 - Connection of the Power Supply to the SSW7000; Power Supply Short Circuit Rating; Motor Connection

SSW7000 | 5-28
Installation and Connection
Table 5.22: Fuse manufacturer codes
Manufacturer
Voltage
2300V
4160V
6900V
Bussmann JCK-x-rr JCL-x-rr JCR-x-rr
Ferraz A240Rxx A480Rxx-1 A720xxDxRO-xx
xx = Recommended fuse
NOTE!
The fuses will not protect the SCRs in a short circuit event. If a short circuit occurs, retest the
SSW7000 according to the procedures described in chapter 7 - First Energization, before activating
the motor.
5.2.6. Connection of the Power Supply to the SSW7000
DANGER!
The line voltage must be compatible with the soft-starter rated voltage.
DANGER!
Provide a device for cutting off the SSW7000 power supply. This device must be able to remove
the power supply at the soft-starter input whenever necessary (for instance during maintenance
work at the SSW7000 panel disconnect switch.
5.2.7. Power Supply Short Circuit Rating
When protected by the fuses supplied in the panel, the SSW7000 is suitable to be used in a circuit able to supply
at most the current (Symmetric arms) established for each respective model and voltage (V) according to table
5.23.
Table 5.23: Maximum current capacity of the power supply
Model
Maximum curent capacity
2300 V
40 kA
4160 V
40 kA
6900 V
40 kA
13800 V *
25 kA, 31,5 kA, 40 kA e 50 kA
* The SSW7000D of 13800V has some options of circuit breakers with different values of maximum current
capacity.
5.2.8. Motor Connection
DANGER!
Power factor correction capacitors must never be installed at the SSW7000 output (U/2T1, V/4T2
and W/6T3).
DANGER!
The SSW7000 has been designed for standard motor connection (three cables).
Connection inside the motor delta is not allowed (six cables.
Multimotor connection is not allowed.