WEG SCA06 User Manual - page 29
3
Installation and Connection
SCA06 | 3-11
Input fuses
The fuse to be used in the input must be of the UF type (Ultra-fast) with I²t equal to or below the indicated in
Table 3.1 on page 3-10
(consider the cold current extinction value, not the melting value) for the protection of
the input rectifier diodes of the servo drive and of the wiring.
Optionally, time-delay slow blow fuses may be used, dimensioned for 1.2 x rated input current of the servo drive.
In this case, the installation is protected against short circuit, except the rectifier bridge diodes in the servo drive
input. That may cause major damages to the servo drive in case some internal component part fails.
3.2.3 Power Connections
Figure 3.5 on page 3-11
shows a complete diagram of the SCA06. In the sequence, each step is described
individually:
1 – ON/OFF switch
2 – Power supply
3 – Contactor
4 – Fuses
5 – Thermostat
6 – Thermal relay
7 – Braking resistor
Figure 3.5: Power and grounding connections