Sourcing Wayside HEP Power Systems for Rail Yards

Head End Power Unit Configurations for Passenger Trains In the late 1990s, the American Public Transportation Association (APTA), implemented practices for Head End Power sources throughout the passenger rail industry. According to 3.1.3 in APTA RP-R-015-99, Head End Power (HEP) is defined as “A system by which 480 VAC 3-phase electrical power, to operate auxiliaries,…

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How to Prevent Exploding Reefer Plugs & Connectors

Those who have plugged in Refrigerated Containers (a.k.a “reefers”) know firsthand that water intrusion can cause reefer plugs and connectors to explode.  This is extremely dangerous and can result in injury to the operator, damage to the plug, receptacle, and surrounding equipment.  And obviously, the refrigerated cargo is no longer being cooled.  Experienced operators will…

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California Transport Refrigeration Unit Regulations in Development

Pending TRU regulations in California may restrict idling at applicable facilities to a maximum of 5 minutes by 2025 in an effort to help improve the environmental impact of the trucking industry. Truck Refrigeration Units, commonly referred to as TRUs, are refrigeration systems that are typically powered by internal combustion engines. TRUs control the environment…

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Designing a Safe Reefer Connection: Part 2

Increasing safety While little has changed in the construction of the receptacles themselves over the years, ESL is constantly challenged to find new solutions that meet unique customer safety and operational requirements. Usually terminal operators have limited or no control over the maintenance and standards associated with male plugs on reefer container cables, the quality…

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Designing a Safe Reefer Connection: Part 1

Safe reefer operations require a receptacle system that exceeds minimum standards in electrical codes. Safely connecting and disconnecting reefer containers operating on 3 Phase 440-480v power represents one of the largest safety risks from an electrical hazard at the majority of container terminals. Reefer receptacles are designed and listed to electrical safety standards of UL…

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