Transformator zapłonowy Kromschroeder TGI8-12/100WE (84391270)

The Kromschroeder TGI8-12/100WE (84391270) is an ignition transformer listed under the ignition transformers category. Parts of this type step mains voltage up to a level that produces a spark at the ignition electrode gap. The transformer operates only during the ignition period, commanded by the burner control. In a typical burner sequence, the control box initiates a pre-purge, then energises the ignition transformer just before opening the fuel valve. The spark must be present long enough to light the gas or oil, and the transformer is de-energised as soon as a stable flame is proven by the ionisation or UV sensor. When selecting an ignition transformer of this class, the key parameters are primary voltage (230 V is standard, but 110 V and 24 V versions exist for certain control circuits) and secondary voltage and current rating, which must match the electrode gap and burner type. Duty cycle is also relevant: a transformer that overheats on continuous operation will fail prematurely. Mounting style and terminal pattern must align with the existing bracket and cabling. The high-voltage cable is silicone-insulated to withstand heat and corona discharge; a hardened or cracked cable can cause the spark to leak to earth, which may be mistaken for a faulty transformer. Always inspect the cable and boot before replacing the transformer itself. Ignition transformers are fitted in the burner assembly, typically close to the combustion head. They work in tandem with the control box, the ignition electrode, and the burner earth. The transformer housing contains the primary and secondary windings and often a built-in rectifier for DC spark systems. Refer to the original part’s markings for voltage and duty cycle rating, and verify that the replacement matches the mounting hole pattern and connector type.