Lambda / TDK / EMI ESS60-250-11

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 has 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.