The Lambda / TDK / EMI EMHP400 is a high-power DC power supply utilizing regulated SCR phase control topology for constant voltage and constant current delivery with automatic crossover. Engineered for industrial applications demanding significant raw power with dependable performance, the EMHP400 operates from three-phase AC input and includes built-in RFI protection, comprehensive metering, and multiple safeguard mechanisms. Note: TDK-Lambda recommends the Genesys™ or GENESYS+™ series for new designs.
## Technical Specifications
**Input**
• Three-phase AC input: 460 VAC ±10%, 50/60 Hz
• Operating range: 440–480 VAC
• Phase-to-phase balance requirement: ±2% for ripple specification
**Output**
• Power range: 20 kW to 90 kW
• Output voltage: 0–10 V to 0–600 V (model-dependent)
• Output current: 0–30 A to 0–1000 A (model-dependent)
• Output ripple: 50–400 mV RMS depending on configuration
• Line and load regulation: ±0.1% (line ±10%, load 50–100%)
• Voltage/current stability: ±0.05% over 8 hours with constant external conditions
**Control & Protection**
• Constant voltage/constant current regulation with automatic crossover
• Output modulation via SCR conduction angle control
• Overvoltage, overtemperature, and overcurrent protection
• Circuit breaker protection
• Contactor on/off interlock control
## Key Features
• L/C filtered rectified DC output for low ripple performance
• Forced air cooling
• Fully metered with mode indicator lights
• Lifting eye-bolt provisions for transport
• SCR phase control topology for precise output regulation
## Typical Applications
Industrial power delivery, electroplating, metal processing, and high-current testing environments requiring stable DC output with minimal ripple and fast dynamic response.
## Compatibility & Integration
Three-phase AC mains connection. External voltage and current control inputs available for remote operation and integration into automated test systems.
