PowerGuard-A 380/30 VDC 3 kW Marine Power Supply — Shipboard 3-Phase 380 VAC to 2 × 30 VDC

The PowerGuard-A 380/30 VDC Marine Power Supply converts the shipboard 3-phase 380 VAC supply into a regulated 30 VDC bus (adjustable 28–32 VDC) and distributes it to two independently protected, remotely switchable outputs of 50 A each. It delivers 3.0 kW continuous and 3.5 kW peak power from a sealed, fanless enclosure that mounts on a deck or bulkhead.

The unit is built on three industry-proven power stages certified to IEC/EN 62368-1, one per phase in a balanced star configuration, running in parallel with active current sharing. The TEDEG control and distribution board adds monitoring, protection and the customer interface: an isolated RS-485 Modbus RTU port, a remote ON/OFF contact for each output and a summary alarm relay. The unit is designed and manufactured by TEDEG in Ankara.

This page reflects the preliminary datasheet Rev. P2 (10/2026), prepared for project discussions: values are confirmed in the final technical proposal, and the temperature ratings will be confirmed by thermal testing. The images are concept visualisations; the final product may differ in detail.

Input:

Output:

Temperature rating (preliminary, to be confirmed by thermal test):

The external fan kit moves ambient air over the outside fins only; the electronics compartment stays sealed. A 4-stage version for 3.0 kW fanless up to +60 °C is available on request.

Protection:

Control and monitoring:

• RS-485: isolated, Modbus RTU (slave), 9.6–115.2 kbit/s, addressable
• Telemetry: input voltage per phase, output voltage, current and power per output, power-stage status and temperatures, operating hours, alarm and event log
• Commands: output A / B ON-OFF, output voltage set-point 28–32 VDC, alarm reset
• Remote ON/OFF: one dry-contact input per output in the SIGNAL & CONTROL connector (closed = ON), working together with the RS-485 commands
• Summary alarm: potential-free relay contact (COM, NO, NC)
• Indicators: five sealed 8 mm LED indicators: POWER, OUTPUT A and OUTPUT B (green), COMM (amber) and FAULT (red)

Connectors (preliminary):

Mating plugs are supplied with the unit. Connector types and pin-outs can be adapted to the ship's installation standard; the full pin-out is given in the interface control document.

Mechanical and environmental:

• Shipboard installation: deck or bulkhead mounting on the two rails below the cooling fins
• Naval and marine platforms: 3-phase 380 VAC to 30 VDC conversion for onboard DC loads
• Mission equipment supply: two independently switchable and protected 50 A outputs
• Remote operation: control and monitoring from the ship's systems over RS-485 Modbus RTU

Three line-replaceable power stages share the load, so the unit keeps running at reduced power (≥ 2.5 kW at +45 °C) if one stage is out of service. The output set-point is stored in the power stages: if the control board fails, the outputs stay at their set-point and the independent 34 VDC hardware over-voltage protection remains active. The sealed, fanless enclosure needs no filter cleaning or fan replacement.

The configuration can be adapted to the project: an external fan kit for full power up to +65 °C, a 4-stage version for 3.0 kW fanless up to +60 °C, a liquid-cooled version using the ship's fresh-water circuit, CAN bus or Ethernet (Modbus TCP) interfaces, and other output voltages in the 24–48 VDC range or more outputs. Every unit passes a 100 % factory test (functional, load and protection tests) with a test report, and a factory acceptance test (FAT) at TEDEG Ankara can be witnessed on request.

For 28 VDC from three-phase 380 VAC in vehicles and field systems, see the PowerGuard-A 380 VAC to 28 VDC converter; for the full range, browse AC-DC & DC-DC Power Converters.

Corporate assurance: TEDEG Defence is an approved supplier of ASELSAN, Roketsan and the Turkish Ministry of National Defence (MSB), with NATO supplier registration under NCAGE: TM885.