The Lambda/TDK EMI ESS50 is a programmable DC power supply engineered for high-current, high-voltage applications requiring precise regulation and EMI suppression. This unit delivers up to 15 kW across output voltage configurations ranging from 50 V to 600 V, with current ratings up to 1400 A, making it suitable for demanding test, industrial, and telecommunications environments. The ESS50 maintains exceptional stability: constant voltage and constant current modes both hold regulation within 0.1% across 100% load changes, with line regulation below 0.1% and long-term stability limited to 0.05% drift over eight hours. Fast transient response—650 microseconds maximum for 30% load steps on units ≤20 V—ensures rapid settling in dynamic test scenarios.
## Technical Specifications
• **Output Configuration:** 10 kW or 15 kW; voltage models: 50 V, 150 V, 300 V, 600 V
• **Output Current:** Up to 1400 A maximum across product line
• **Regulation Accuracy:** ≤0.1% load regulation, ≤0.1% line regulation (190-253 VAC to 500 VAC inputs)
• **Stability:** 0.05% maximum deviation over 8 hours (constant line, load, temperature)
• **Temperature Coefficient:** Output voltage 0.02% per °C; output current 0.03% per °C
• **Transient Response:** ≤650 µs (≤20 V units, 30% step); Vmax/20 (>20 V units)
• **Input Options:** Single-phase and three-phase, 190–528 VAC with auto-transformer availability
• **Power Factor:** 0.9
• **Efficiency:** 85%
## Key Features
• Front panel ten-turn potentiometers for voltage and current adjustment
• Dual analog meters displaying simultaneous output voltage and current
• Adjustable overvoltage protection (OVP) with load safeguarding
• Pulse-by-pulse current limiting for fast recovery in high-current transients
• Phase loss detection (inputs >208 VAC) and inverter/control failure indicators
• Failsafe soft start and UL-listed primary circuit breaker
## Typical Applications
Battery charging systems, power conversion testing, RF and microwave component characterization, industrial power conditioning, and accelerated life testing of power-sensitive equipment.
## Compatibility & Integration
Rear panel analog programming and monitoring interfaces enable integration with external controllers and test systems. **Note:** This series is legacy; TDK-Lambda recommends Genesys™ or GENESYS+™ for new designs.
