Low Voltage Power Supply (LVPS)

Espey developed this power supply for a major locomotive manufacturer. The high reliability power supply was designed and tested for extreme locomotive environmental conditions. This Power Converter operates from a very wide input ranging from 25 to 85 Vdc. There are six outputs (+5, +15, -15, +19, +24, -24 Vdc) with a total load power of 1000 W continuous and 1620 W for one-minute transients. All outputs are fully regulated with 115% current limiting and 125% OVP.

Electrical Specifications

• Input Voltage: 25 – 85 Vdc
• Output Voltage: +5,+15,-15,+19,+24,-24 Vdc
• Output Power: 1000 watts continuous/channel
• Regulation, Line & Load: ±5%
• Efficiency: 75 % minimum

Mechanical Specifications

• Weight: 40 lbs. max
• Size: 10”x10”x15”
• Aluminum extrusion with integral heat-sink

Features

• Output current limit protection
• 20% design margin on power and current ratings
• Power enable control signal
• Soft-start with battery voltage application or enable control signal
• Qualified to locomotive environment extremes
• Qualified for EMI
• High Reliability Design

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