Home KEB F4 Combivert Frequency Inverter Series 12.F4.S3D-3420

12.F4.S3D-3420

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The 12.F4.S3D-3420 frequency inverter is a 4.0kW device with an apparent power of 6.6kVA, operates at a voltage of 400V, and features inverter control type. Part of the F4 Combivert Frequency Inverter Series by KEB, it includes a mains filter and functions at a frequency of 50/60Hz.

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Product Description

12.F4.S3D-3420 is a high-performance frequency inverter from KEB Automation. It is designed for speed control of step less three-phase motors. The inverter converts input AC power to DC, and then converts the DC to output AC at a specific voltage and frequency for accurate motor control. It belongs to the 400 Volts class, and is designed for use on 3-phase AC mains. The supported range of AC input is from 305 to 500 Volts AC. Size of the 12.F4.S3D-3420 inverter unit is 12 and it is part of the F4 product line. Its nominal power output rating is 6.6 kVA. The maximum rated motor power is 4 kilowatts. Output current under normal operating conditions is 9.5 Amps. The input current under normal operating conditions is 10.5 Amps.

KEB has designed the unit for operation at 2 kilohertz switching frequency. Under optimal conditions it dissipates 115 Watts as heat. Cool air enters the unit via an inlet at the bottom and warm air exits via an outlet located at the top. A heat sink is installed for improving heat dissipation. An internal fan is also installed for increasing air flow and improving heat dissipation. For proper ventilation, KEB recommends providing 100 millimeters spacing around the mounted unit. The mounting orientation for the inverter is vertical. It is available in an IP20 rated housing that is suited to indoor use. The inverter must be protected from dust, moisture, and corrosive gases during operation. KEB recommends using 2.5 mm2 power wire and 0.5 Nm tightening torque for the power terminals. The recommended ambient temperature for inverter operation is from -10 to 45 degrees Celsius. Installed accessories include a filter and a braking resistor.