Kruger Ecowatt K320 Series Operation Manual page 364

Ecowatt Drive K320 series
®
Note:
The input EMI meets the C2 requirements after an input filter is configured.

The preceding table describes external accessories. You need to specify the ones you

choose when purchasing accessories.
D.8 Braking system
D.8.1 Brake component selection
When the VFD driving a high-inertia load decelerates or needs to decelerate abruptly, the
motor runs in the power generation state and transmits the load-carrying energy to the DC
circuit of the VFD, causing the bus voltage of the VFD to rise. If the bus voltage exceeds a
specific value, the VFD reports an overvoltage fault. To prevent this from happening, you need
to configure brake components.
The design, installation, commissioning, and operation of the device must

be performed by trained and qualified professionals.
Follow all the "Warning" instructions during the operation. Otherwise,

major physical injuries or property loss may be caused.
Only qualified electricians are allowed to perform the wiring. Otherwise,

damage to the VFD or brake components may be caused.
Read the braking resistor or unit instructions carefully before connecting

them to the VFD.
Connect braking resistors only to the terminals PB and (+), and braking

units only to the terminals (+) and (-). Do not connect them to other
terminals. Otherwise, damage to the brake circuit and VFD and fire may
be caused.
Connect the brake components to the VFD according to the wiring

diagram. If the wiring is not properly performed, damage to the VFD or
other devices may be caused.
The VFD models of 045P and lower are equipped with built-in braking units, and those of 055P
and higher need to be configured with external braking units. The VFD models of 055P–075P
can be configured with optional built-in braking units, and after a built-in braking unit is
configured, the VFD model code is added with a suffix "-B", for example, K320-055P-4-B. Select
braking resistors according to the specific requirements (such as the brake torque and brake
usage requirements) on site.
Optional peripheral accessories
-355-