Transformateur d'allumage Kromschroeder TGI 5-15/100WE (84391250)

The Kromschroeder TGI 5-15/100WE (84391250) is an ignition transformer for burners and industrial heating systems. Parts of this type step up the mains voltage to a high enough level to produce a spark across the gap of the ignition electrode. They are energised only during the ignition phase, controlled by the burner control box. The spark ignites the fuel-air mixture; once the flame is confirmed by the ionisation electrode or flame detector, the transformer is switched off. Common selection parameters for such transformers include secondary voltage and current, primary voltage (typically 230 V, but 110 V and 24 V exist), duty cycle, mounting style, terminal arrangement, and the connector pattern for the ignition cable. The ignition cable itself must be silicone-insulated to withstand high voltage and heat. A damaged cable can leak the spark to earth and mimic a faulty transformer, so always inspect the cable when troubleshooting a no-spark condition. When replacing an ignition transformer, verify the physical dimensions, the mounting hole centres, and the type of high-voltage connector. The TGI series designation indicates a particular housing and terminal layout, but specific ratings must be confirmed from the manufacturer’s data sheet or the original part. Burner controls from different makers may use different control signals; ensure the primary voltage and control logic match. Also check that the transformer’s duty cycle (on-time and off-time interval) suits the burner’s ignition sequence. A transformer with too short a duty cycle could overheat if the burner cycles frequently. Use the exact replacement part number or a cross-reference verified against the burner’s technical documentation.