GE 246B2357BAG03 De-excitation Module

The GE 246B2357BAG03 de-excitation module safely discharges generator field energy during faults. This module provides a rapid discharge path for the exciter field winding. You will find this de-excitation module in GE generator excitation control panels. Its fail-safe design ensures generator protection during emergency shutdowns.

De-Excitation Architecture

This de-excitation module monitors the generator field voltage continuously. Consequently, it triggers the discharge circuit when the controller commands shutdown. The GE 246B2357BAG03 uses redundant thyristors for high reliability. Moreover, a hardware watchdog supervises all critical functions. You can configure trip levels without modifying the module hardware.

Technical Specifications

Parameter	Value
Input Voltage	250V DC maximum (field voltage)
Discharge Current	50A peak, 10A continuous
Trip Inputs	2 (redundant, 24V DC logic)
Trip Outputs	2 relay, form C, 250V AC/30V DC, 5A
Trip Response Time	5 ms maximum
Discharge Resistance	5 Ω (internal)
Dimensions	210mm x 160mm x 40mm
Weight	0.78 kg (1.72 lbs)
PCB Layers	6
Onboard Components	4 thyristors, 2 relays, 1 watchdog, 2 optocouplers
Connector Count	5 (field input, trip input, relay output, power, status)
Status Indicators	4 LEDs (active, tripped, power, fault)
Energy Storage	2200 µF (control power filtering)
Isolation Voltage	2500V (field to logic)
Operating Temperature	-10°C to +55°C
Storage Temperature	-25°C to +70°C

Redundant Triggering and Safety Features

The unit includes two independent trip input channels for redundancy. Therefore, a single channel failure does not prevent de-excitation. This module replaces the GE 246B2357BAG03 version without any wiring changes. Simply remove the old module and install this one. GE designed this de-excitation module for panel mounting. Hence, it fits into standard generator protection enclosures.

Six PCB layers separate high-voltage field traces from logic circuits. Five connectors handle all field, trip, relay, and power signals. The GE 246B2357BAG03 includes a hardware watchdog for continuous self-checking. Accordingly, it detects internal faults and alerts the main controller. Four status LEDs show active, tripped, power, and fault conditions clearly.

Installation and Testing Guide

The module performs a self-test on power-up to verify all circuits. Any self-test failure will illuminate the fault LED immediately. The GE 246B2357BAG03 works with all GE generator excitation systems. Always verify the discharge resistor rating before installation. Proper shielding of trip input cables prevents false triggering from noise.

The internal discharge resistor dissipates stored field energy safely. The module includes thermal protection for continuous discharge duty. The GE 246B2357BAG03 provides reliable generator protection during faults. Installation requires only a screwdriver for field and relay connections. This module meets applicable safety standards for excitation systems.