Kromschroder Ignition transformer TGI7-25/20W 84391080

The Kromschroder TGI7-25/20W ignition transformer (SKU 84391080) is designed for high-voltage spark ignition of gas burners and gas-ignited or directly ignited oil burners. It operates with a supply voltage of 230 V at 50 Hz, providing a secondary voltage of 7 kV and a secondary current of 25 mA. The transformer has a duty cycle of 20% and an ingress protection rating of IP65. It supports single-electrode operation, where ignition and ionization currents flow over a common electrode. This unit must be mounted in a housing, such as a control cabinet.

Ignition transformers of this type are selected by matching the supply voltage, secondary voltage, and secondary current to the burner's ignition system requirements. The duty cycle must be compatible with the burner's operational cycle to prevent overheating. Installation requires mounting in a suitable enclosure that meets the specified ingress protection rating, and the transformer must be connected according to the manufacturer's wiring diagram. Ensure the electrode configuration (single or dual) matches the transformer's capability.

Common failure modes for ignition transformers include internal short circuits, open windings, or insulation breakdown, leading to weak or absent spark. Symptoms may include the burner failing to ignite, intermittent ignition, or a buzzing sound from the transformer. Check for visible damage, measure primary and secondary voltages with appropriate safety precautions, and verify the duty cycle is not exceeded.