1 Application Ignition transformers TZI and TGI are designed for high-voltage spark ignition of gas burners and gas-ignited or directly ignited oil burners. The ignition transformers can also be used on burners with single-electrode operation; the ignition current and ionization current flow over a common electrode. Ignition transformer TZI fulfils the requirements for enclosure IP 20. It is suitable for installation in a control cabinet. Ignition transformer TGI in its die-cast aluminium housing meets the requirements for enclosure IP 65. It is suitable for on-site mounting near to the burner.