P-Duke Railway Power Supplies

EN 50155 is the European standard for electronic equipment used on rolling stock (trains, metros, trams). It specifies requirements for: Input voltage ranges including battery voltage variations and transients

Operating temperature ranges from -40°C to +70°C or higher

Shock and vibration resistance per EN 61373

EMC immunity for the electrically noisy railway environment

Fire safety per EN 45545-2. Compliance with EN 50155 ensures equipment will operate reliably in the harsh railway environment. Railway operators and system integrators typically require EN 50155 certification for all electronic equipment installed on rolling stock. P-Duke railway power supplies are fully tested and certified to meet these stringent requirements.

For rolling stock applications, always select power supplies with full EN 50155 certification to ensure compliance and reliability.

The 14:1 ultra-wide input range (14-160VDC) is critical for railway battery systems: Railway batteries are typically 24V, 48V, 72V, 96V, or 110V nominal

Battery voltage varies from discharged (0.7x nominal) to charging (1.25x nominal)

A 14:1 converter handles all standard railway battery voltages

Eliminates need for different converters for different battery systems

Provides compatibility across different train types and regions. For example, a 110V battery system ranges from approximately 77V (discharged) to 137V (charging), while a 24V system ranges from 17V to 30V. The 14-160V range covers all these variations plus provides margin for voltage transients. This wide range simplifies inventory and maintenance for railway operators with mixed fleets.

For railway applications with varying battery systems, select 14:1 input range converters for maximum compatibility.

P-Duke railway power supplies meet EN 45545-2 fire safety requirements for rolling stock: HL3 (Hazard Level 3) rating for maximum fire safety

R22 and R23 requirements for electrical equipment

Low smoke emission during combustion

Halogen-free materials to reduce toxic gas release

Flame retardant properties to prevent fire spread. EN 45545-2 replaces national standards (DIN 5510, NFF 16-101, etc.) with a unified European standard. The HL3 rating is the highest hazard level, required for equipment installed in areas where evacuation may be difficult. P-Duke railway supplies use materials and construction techniques that meet these stringent fire safety requirements, ensuring compliance with modern railway safety standards.

For rolling stock applications, verify fire safety ratings meet EN 45545-2 HL3 requirements for maximum safety compliance.

P-Duke railway power supplies meet EN 61373 Category 1, Class B for shock and vibration: Random vibration: 5-150Hz at 1.0g RMS (body mounted) or 1.5g RMS (bogie mounted)

Shock: 50g, 11ms half-sine pulse

Category 1 covers equipment mounted on railway vehicles

Class B covers equipment on the body of the vehicle. The robust construction includes: Reinforced component mounting

Conformal coating for environmental protection

Strengthened solder joints

Vibration-resistant connectors. These ratings ensure reliable operation in the severe mechanical environment of rolling stock, including wheel-rail impacts, curve negotiation, and braking forces. P-Duke railway supplies undergo vibration testing during qualification to verify compliance.

For railway applications, verify shock and vibration ratings meet EN 61373 requirements for your specific mounting location.

P-Duke railway power supplies include comprehensive transient protection per EN 50155: Input voltage interruptions: Maintain output during 10ms, 30ms, or 100ms interruptions depending on class

Surge protection: Withstand 1.4x nominal voltage for 1 second

Load dump: Handle voltage spikes up to 1.5x nominal

Brownout: Continue operation during voltage dips to 0.6x nominal. The protection circuits include: Input capacitors for ride-through during interruptions

TVS diodes for surge suppression

Active control circuits for voltage limiting

Isolation barriers for safety. These protections are critical for railway applications where: Circuit breakers open and close causing voltage interruptions

Battery switching creates transients

Regenerative braking generates voltage spikes. The power supplies are designed to continue normal operation through these transient conditions.

For railway applications, verify transient protection meets the specific class requirements (S1, S2, S3) for your application.