Kromschroder Ignition transformer 84391020

The Kromschroder ignition transformer 84391020 is a device designed to generate a high-voltage spark for igniting gas and oil-fired burners. It operates with a supply voltage of 230 V and produces a secondary voltage of 7.5 kV at a secondary current of 20 mA. The transformer has a duty cycle of 33% and operates at a frequency of 50 Hz, with a power consumption of 33 W. Its design allows installation in control rooms or directly near the burner, such as on furnaces.

Ignition transformers of this type are selected by matching the supply voltage, secondary voltage, and current requirements of the burner control system. The physical mounting form (e.g., bracket type, dimensions) must be compatible with the existing installation. Before ordering, verify the electrical specifications and compare the mounting holes and terminal connections with the old unit.

Common failure modes for ignition transformers include internal short circuits or open windings, often caused by moisture ingress or overheating. When a transformer fails, the burner may not ignite, or the ignition spark may be weak or intermittent. Check for visible damage, measure the secondary voltage with a suitable high-voltage probe, and verify the primary supply voltage and continuity.