30.DR.B28-4430 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 30.DR.B28-4430 is a mains input choke from the DR Motor Input Chokes series and weighs 77 kilograms. It features a rated current of 660 Amps, a rated voltage of 400 Volts AC, and a power loss of 650 Watts. The choke has a phase count of 3 and measures 480 mm wide by 210 mm high by 390 mm deep.
Internal Product Review
The 30.DR.B28-4430 is a KEB mains input choke designed for three-phase drive systems. With 0.045 mH inductance and a 660 A rated current, the unit supports stable line conditioning in demanding industrial service. The cabinet-ready form and 77 kg construction make this choke a dependable choice for high-current installations.
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Product Description:
The 30.DR.B28-4430 is a three-phase mains input choke produced by KEB for the DR Motor Input Chokes series. Installed between the plant supply and an inverter, this passive component raises network impedance to reduce harmonic currents and damp voltage transients before they reach downstream motor drives. The added line-side inductance stabilizes current flow and minimizes electromagnetic interference in variable-frequency drive systems used in automation cells and other industrial machinery.
This choke is designed for a nominal line voltage of 400 V AC and can carry up to 660 A continuously without saturating its laminated core. Its winding set provides an inductance of 0.045 mH, which limits the rate of current change while keeping copper losses within the intended operating range. The choke has a rated impedance voltage drop of 4 %, providing fault-current limitation and reducing the effect of disturbances from the supply network. Magnetic and copper losses amount to 650 W at the rated load, so the cabinet must provide sufficient airflow to remove the generated heat. Adequate ventilation also helps prevent excessive winding temperatures when the choke operates continuously near its maximum current.
The enclosure measures 480 mm wide, 390 mm deep, and 210 mm high, while the complete assembly has a mass of 77 kg. Its steel core is sized to handle the magnetic flux associated with the choke’s electrical load, and the substantial mass requires a rigid mounting surface. The mounting centers measure 450 × 130 mm, allowing the base to be positioned accurately on a panel frame or base plate. Oval mounting slots measuring 12 × 20 mm accept standard M12 hardware and provide adjustment during alignment. The mounting location should provide enough clearance for cooling airflow, cable bends, and safe access to the electrical terminals. Positioning the choke near the drive can keep conductor runs short while maintaining the required electrical clearances inside high-current switchgear.
