09.F4.S1D-BR30

Product Description:

KEB 09.F4.S1D-BR30 is one of the F4 Combivert Frequency Inverters. This frequency inverter has a housing size of 9 with design D. It has a standard control. This inverter has a braking transistor. A braking resistor in a Combivert frequency inverter, also known as a dynamic braking resistor (DBR). It controls the speed of an electric motor by absorbing and dissipating excess energy as heat. When a motor decelerates, it feeds energy back into the DC link, increasing the DC bus voltage.

If the voltage surpasses the maximum capacity of the DC bus, the Dynamic Braking Resistor (DBR) activates to manage the surplus energy. This is designed to convert the excess energy into heat, effectively braking the motor and ensuring safe operation. By dissipating the energy as heat, the braking resistor plays an important role in maintaining the integrity of the inverter by preventing voltage increases that could cause damage. It ensures smooth and controlled deceleration of the motor. A braking resistor is important because it prevents the inverter from overvoltage. A braking resistor is often the most cost-effective way to dissipate regenerative energy from AC motors. Braking resistors are used in machinery and electrical installations, such as molding machines, shredders, and woodworking machinery.

The frequency inverter has an output nominal power of 2.8 kVA. It is designed for a maximum rated motor power of 1.5 kW. It operates at an output nominal current of 7 A, with a maximum short-time current equal to 12.6 A. The overcurrent tripping current is set at 15 A to protect the system from excessive current. The rated operating frequency is maintained at 8 kHz, which shows its maximum operating frequency.