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This unit is a Gate Unit Power Supply (GUSP) by ABB, identified by part number 3BHB004661R0101 and type designation KU C711 AE101, designed for
use within ABB’s medium-voltage drive and excitation systems, such as the ACS 1000, ACS 800/1000 series, and AC800M excitation systems.
Functionality
Provides stable power to gate units for controlling IGBTs or related power semiconductors;
often includes galvanic isolation between control electronics and power devices.
Isolation & Precision
Incorporates high-voltage isolation (up to 5 kV AC for 1 min) and fast fiber-optic
triggering with ≤50 ns propagation delay.
Protections & Switching Integrity
Features DESAT protection (to prevent IGBT failures during short circuits),
plus overvoltage, undervoltage, thermal overload, and short-circuit safeguards.
Electrical Output
Output gate voltages typically around +15 V / -8 V, with output current up
to 30 A peak (some sources list up to 100 A).
Operating Conditions
Designed for industrial environments, with operating temperature ranges from approximately
-40 °C up to +85 °C, and humidity tolerance up to 95% non-condensing.
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