Power Electronics SD750FR, Hardware And Installation Manual

Page: 52 / 80

SD750FR POWER ELECTRONICS
50
POWER CONNECTION
EN
Other protections
Apart from the protections mentioned above, the drive implements additional protections such as
temporary loss of power, automatic re-start, high and low input and output voltage, overload or
underload of the pump, etc. For further information, consult the Software and Programming Manual .
Safety Stop Function
The Safety Stop Function allows the drive
’s output to be disabled so that the drive cannot provide
power or generate torque in the motor.
The Safe Torque Off function complies with EN ISO 13849-1 PLd. This feature is standard and allows
you to comply with current safety standards. For more infor
mation see section “STO - Safe Torque
Off”.
IT Grids - Floating earth drives
When planning an IT grid electrical installation select the drive for floating earth operation. Check the
drive reference and make sure that the drive is suitable for this type of installations.
IT grids must be equipped with an insulation monitoring system. To adjust the parameters, consider
that the drive has a very high impedance even if there is a large number of equipment working in
parallel in the same IT network.
It is recommended the installation of lightning rods to ground in order to protect against transient
overvoltages. The lightning rod must have a rated voltage greater than the drive rated voltage for the
purpose of preventing its operation during normal conditions.