Basler Electric 2D80367G23 – DXCB De‑Excitation Module

The Basler Electric 2D80367G23 is a high‑power de‑excitation module (DXCB) designed to safely dissipate the stored energy in a generator field winding during fault conditions. Rated for 1200 V and 5000 A, this module protects the rotor insulation and the excitation system from damaging overvoltages that can occur during rapid field suppression.

Operation and Safety

When a fault is detected—such as a generator differential trip or overspeed condition—the de‑excitation module rapidly inserts a discharge resistor across the field winding. This diverts the field current away from the thyristor bridge and dissipates the magnetic energy as heat. The module includes a thyristor‑based firing circuit that ensures fast and reliable activation, with a response time of less than 10 ms.

• Voltage rating: 1200 V DC

• Current rating: 5000 A (peak)

• Energy dissipation: 10 MJ (max)

• Activation: external trip signal (24 V DC or 120 V AC)

• Response time: < 10 ms

• Protection: overcurrent, overtemperature

• Indicators: status LED, trip counter

• Mounting: panel or chassis with forced‑air cooling

• Operating temperature: –10 °C to +55 °C

Application in Excitation Systems

This de‑excitation module is typically used in large static excitation systems for utility‑scale generators. It works in conjunction with the main voltage regulator and protection relays to ensure safe shutdown under fault conditions. The module is also valuable in industrial applications where rapid field suppression is required to prevent damage to the prime mover or electrical system.

Installation and Integration

Mounting requires a suitable cabinet with adequate space for heat dissipation. Power connections are made via heavy‑duty bus bars, and control wiring uses pluggable terminals. The module can be integrated with most Basler regulators and protection systems, providing a complete protection package.

Reliability and Testing

Each 2D80367G23 module undergoes rigorous testing, including dielectric withstand, thermal cycling, and full‑energy discharge verification. Built to Basler’s high standards, it ensures reliable protection for critical generating assets.

In summary, the Basler Electric 2D80367G23 de‑excitation module provides rapid, safe field suppression, protecting generators and excitation systems from damaging overvoltages.