EA-PSB 20920-20 Triple 920V 20A 15kW Programmable Bidirectional DC Power Supply

The EA-PSB 20920-20 Triple from EA Elektro-Automatik is a high-voltage programmable bidirectional DC power supply featuring three independent, fully isolated channels in a compact 3U form factor. As part of the PSB 20000 Triple series, this 15 kW total power unit delivers 0-920 V and 0-20 A per channel with autoranging technology, enabling a wide operating range for demanding applications. It operates as both a source and a regenerative sink with up to 95.5% efficiency in sink/source mode and energy recovery back to the grid up to 96%, significantly reducing operational and HVAC costs. The device accepts 208-480 V ±10% three-phase AC input with active PFC (typical 0.99) and includes built-in USB, 1 Gbit Ethernet, EtherCAT, CAN FD, digital I/O, and Share-Bus interfaces for seamless integration. A comprehensive function generator supports square wave, trapezoidal wave, ramp, and arbitrary waveforms, plus PV simulation per DIN EN 50530 and fuel cell simulation for advanced renewable energy testing. The master-slave bus allows parallel operation of up to eight units for system scalability up to 120 kW. With 1 ms communication speed, forced air cooling, and compliance with EN 61010-1/UL 61010-1, this power supply is ideal for electric vehicle, high-voltage battery, and industrial applications requiring precise multi-channel bidirectional power.

Key Features

• Three Independent Bidirectional Channels: Each channel provides 0-920 V / 0-20 A with autoranging, fully isolated for parallel testing of high-voltage components.
• High Efficiency & Energy Recovery: Up to 95.5% efficiency in source/sink modes and regenerative energy recovery up to 96% back to the grid, minimizing heat and electricity costs.
• Advanced Autoranging Output: Delivers full 5 kW per channel across a wide voltage and current range, increasing flexibility compared to traditional power supplies.
• Integrated Waveform Generator: Built-in square wave, trapezoidal wave, ramp, and arbitrary waveform generator; supports PV panel simulation per DIN EN 50530 and fuel cell characteristics.
• Comprehensive Digital Interfaces: Standard USB, 1 Gbit Ethernet, EtherCAT, CAN FD, digital I/O, and Share-Bus for fast 1 ms control and easy system integration.
• Scalable Parallel Operation: Master-slave bus enables parallel connection of up to eight units for total system power up to 120 kW and currents up to 1600 A at 920 V.
• Compact 3U Design & Global Grid Compatibility: 19" rack-mountable 3U chassis with universal 208-480 V three-phase input and active PFC (0.99 typical), suitable for worldwide use.