The ESS60-250-11 is a 15 kW programmable DC power supply delivering 0–60 VDC at 0–250 A for high-current industrial and laboratory applications. Built on the ESS Series platform, this unit provides constant voltage and constant current operation with automatic crossover, pulse-by-pulse current limiting, and adjustable overvoltage protection. Fast transient response, tight load regulation, and comprehensive front-panel metering make it suitable for RF amplifiers, DC motor testing, and magnetic coil excitation where reliable high-current performance is essential.
## Technical Specifications
**Output Performance**
• Output voltage: 0–60 VDC
• Output current: 0–250 A
• Power output: 15 kW
• Line regulation (CV/CC): ≤0.1%
• Load regulation (CV): ≤0.1% for 0–100% load change
• Load regulation (CC): ≤0.1% for 0–100% voltage change
• Stability (8-hour period): ±0.05% of rated output
• Temperature coefficient (voltage): 0.02% per °C
• Temperature coefficient (current): 0.03% per °C
• Ripple and noise: 50–300 mV peak-to-peak
• Response time: <650 µs at 20 V nominal; scales by Vmax/20 for higher voltage models
**Input & Power Quality**
• Input voltage: 180–480 VAC single-phase or three-phase (field-selectable)
• Frequency: 50/60 Hz
• Efficiency: 85–91%
• Power factor: ≥0.9
## Key Features
• Automatic CV/CC crossover for seamless mode switching
• Adjustable front-panel overvoltage protection (OVP)
• Adjustable current limit with pulse-by-pulse response
• Failsafe soft-start circuit
• Dual ten-turn potentiometers for voltage and current adjustment
• Simultaneous front-panel metering of voltage and current (analog or digital)
• Status indicators for overvoltage, inverter failure, phase loss, and control failure
• UL-listed primary circuit breaker
• Analog programming interface on rear panel
• Optional RS-232/IEEE 488 interface for remote control and monitoring
## Typical Applications
• RF amplifier power conditioning
• DC motor characterization and testing
• Magnetic coil and electromagnet excitation
• High-current load simulation
## Compatibility & Integration
The ESS60-250-11 accepts 180–480 VAC input (single or three-phase, 50/60 Hz); configurations above 380 VAC may require 5-wire architecture. Remote digital control is available via optional RS-232/IEEE 488 connectivity. Note: TDK-Lambda recommends the Genesys™ or GENESYS+™ series for new designs.
