ENI-PS3000-6,4-AC/DC Converter

PRODUCT DATA SHEET.pdf

APPLICATION

The ENI-PS3000-6,4-AC/DC static converter is intended to provide power from 3 kV_DC systems to non-traction system loads. The converter can supply power to all equipment with the rated input voltage of 3 x 400 V_AC, 50 Hz or 230 V_AC, 50 Hz and 24 V_DC (for battery bank charging).

SPECIFICATIONS

DESIGN

The device is encased with a steel frame, designed for installation in switching station rooms. The converter enclosure is a sealed and durable instrument cabinet. The cabinet back wall features the aluminium heat sinks. The single door is swung to the right for service access. The enclosure is preserved with a powder coat for improved resistance to operating conditions. The converter is mounted with four fastening holes in the base. The metal components of the enclosure are isolated from the internal electrical system. The contact system voltage input is provided over two cables, passing the glands, and into the HV input lines of the converter, located at the bottom section of the back wall.

OPERATION

The converter ENI-PS3000-6,4-AC/DC transforms the 3 kV_DC railway contact system supply voltage into output voltages:

• 24 V_DC for DC lines and the battery bank;
• sine-wave 3 x 400 V_AC, 50 Hz (230 V_AC) for AC lines.

The supply voltage passes the input filter on the way to the HV inverter and is converted there into HF AC voltage to power the primary winding of the power transformer. The transformer secondary winding output voltage is rectified and filtered to power the LV block of the converter. The LV block generates the AC and DC output voltages and feeds them to the converter output terminals. The HV lines (the contact system voltage) and the output voltage lines are galvanically separated, and all electric circuits are isolated from the device enclosure. The DC and three-phase AC output lines are galvanically separated from each other. The control systems ensure stable AC and DC voltage outputs. The diagnostic systems monitor the performance and operating readiness of the entire device and its individual blocks. The internal control systems of the converter feature microprocessor controllers for the individual functional blocks. The device generates three-phase sine-wave AC output voltage (through an integrated harmonic filter).

Device functionalities:

• soft start of the HV power processing circuit;
• maintenance of constant AC and DC output voltage values irrespective of variations in the HV input voltage or loads;
• AC and DC output overload (shorting and overcurrent) monitoring and protection;
• the self-start system ensures that the converter will run on the HV voltage if the external battery bank fails.

BLOCK DIAGRAM