26.E4.T60-1051 KEB
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The KEB 26.E4.T60-1051 is part of the Combiline EMC Filters series and is designed for 3 phase plus PE network types with a rated current of 300 Amps. It supports a rated voltage of 400 or 480 VAC and operates with a maximum input voltage of 528 V. The filter offers a leakage current of 60 mA, a power dissipation of 50 W, and is suitable for ambient temperatures up to 45 degrees Celsius.
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Product Description:
The 26.E4.T60-1051 is an electromagnetic compatibility (EMC) filter produced by KEB as part of the Combiline EMC Filters series. It is installed on three-phase converters to reduce high-frequency noise returning to the mains and to protect sensitive devices connected to TN, TT, or IT power networks in automated lines.
The filter accepts a nominal line voltage of 400/480 VAC and is built for a continuous load of 300 A, so it can be placed upstream of large inverters without saturating its inductive path. Conduction losses are minimized by a winding resistance of only 0.001 Ω per phase. Dielectric strength is proved by a high-voltage test of 2700 VDC for 2 s between any phase and protective earth, while 1000 VDC for 2 s is applied between phases to confirm inter-phase isolation. The assembly remains safe up to a line surge of 528 V, giving headroom above the rated value. Connection is accomplished through an M10 copper busbar on the line side, and a PE stud is secured with M12 screws; the internal circuit follows a 3 Ph + PE topology to maintain symmetrical attenuation.
During operation the core and windings convert unwanted energy into heat, and the unit is rated for 50 W of dissipation, a figure that determines cabinet airflow requirements at the stated maximum ambient of 45 °C. At the rated line conditions it introduces a leakage of 60 mA to earth, well inside the permitted ceiling of 220 mA, so residual-current devices can be sized accordingly. The filter meets the stringent industrial limits assigned to suppression category C2, enabling motor leads up to 30 m in length to stay within conducted-emission thresholds. These characteristics, combined with tested clearances, allow the device to maintain electromagnetic compliance for high-power drives without external chokes or additional shielding.
