The Lambda / TDK / EMI ESS330-45 is a 15 kW programmable DC power supply engineered for demanding industrial and laboratory applications requiring precision voltage and current regulation. This three-phase input unit delivers 0–330 VDC at 0–45 A with exceptional load regulation and thermal stability, backed by comprehensive protection and front-panel programmability.
## Technical Specifications
• **Output:** 0–330 VDC / 0–45 A (15 kW rated power)
• **Input:** 342–456 VAC, three-phase
• **Power Factor:** 0.9 passive
• **Efficiency:** 85–91%
• **Line Regulation:** <0.1% deviation across input range in constant voltage or constant current mode
• **Load Regulation (CV):** <0.1% voltage variation on 100% load step
• **Load Regulation (CC):** <0.1% current variation on 100% load step
• **Stability:** ±0.05% maximum deviation over 8-hour continuous operation (constant line, load, temperature)
• **Output Ripple (PARD):** 125 mVp-p
• **Temperature Coefficient (Voltage):** 0.02% per °C
• **Temperature Coefficient (Current):** 0.03% per °C
• **Operating Temperature:** 0–50°C continuous; 4% derating per °C above 50°C
• **Storage Temperature:** −55 to +85°C
• **Form Factor:** 5U rack-mount
## Key Features
• Adjustable front-panel overvoltage protection with load isolation
• Pulse-by-pulse current limiting with fast recovery for high-current transient applications
• Dual ten-turn potentiometers for manual voltage and current adjustment
• Analog meters for real-time voltage and current monitoring
• LED fault indicators: overvoltage, inverter failure, phase loss, control failure
• Phase loss and neutral loss detection (380, 415, 480 VAC; neutral above 208 VAC)
• Failsafe soft-start circuit
• Thermal shutdown with LED indication
• UL-listed primary circuit breaker with integrated on/off control
• Remote start/stop/interlock via external AC or DC signal
• Analog programming interface (0–5 V standard) on rear panel
• Optional RS232/IEEE 488 digital interface
## Typical Applications
Electronics testing, device validation, battery charging systems, industrial power conditioning, accelerated life testing, and load simulation requiring high current density and precise output control.
## Compatibility & Integration
Analog programming and monitoring via standard 0–5 V signals. Optional RS232/IEEE 488 enables remote configuration and telemetry. Remote trigger inputs accept AC or DC sources for distributed control architectures.
