Ignition Transformer

Function

Reliable ignition is essential for safe burner operation. Burner management systems impose a limited ignition-attempt window (typically 5–10 seconds); if a spark is not established and a flame signal is not received within this period, the system locks out and requires manual reset. A degraded transformer producing intermittent or weak spark output causes repeated lockouts, wasting production time and creating safety delays during cold-morning startups when drum warm-up is on the critical path.

Construction & quality

Core-and-coil assembly: laminated silicon-steel core, high-voltage secondary winding in enamelled copper wire, encapsulated in Class H (180°C) epoxy resin within an IP54 or IP65 ABS or aluminium alloy housing. Primary input: 230V or 415V, 50/60 Hz. Secondary output: 6–10 kV, 20–30 mA short-circuit current. Output leads: high-voltage silicone-insulated cable with spring-loaded push-in or screw-terminal HV connectors. Mounting: DIN-rail or screw-foot plate. Duty cycle rating: S2 intermittent, typically 15-minute rated on/off cycle.

When to replace

• Burner management system repeatedly reaching lockout on startup with no ignition confirmed
• Weak or absent snapping sound from the ignition electrode during the ignition attempt
• Visible cracks, discoloration, or tracking marks on the transformer housing or HV lead insulation
• Measured secondary voltage below rated output when checked with a calibrated HV test meter
• Transformer case running abnormally hot during short ignition sequences, indicating insulation degradation