CONVERTEAM ALSTOM MVC3003-4003 SMPS Power Supply

CONVERTEAM ALSTOM MVC3003-4003 Switch Mode Power Supply (MVC3003-4003A)

The Converteam MVC3003-4003 (also designated MVC3003-4003A) is a 110 W switched-mode power supply (SMPS) module built for the ALSPA MV3000 DELTA variable frequency drive family. It taps directly into the drive’s high-voltage DC link on 575–690 VAC nominal systems to generate isolated low-voltage control rails for the transistor bridge electronics and the MV3000e Common Drive Controller.

In heavy-duty marine propulsion, thrusters, and industrial process drives, control electronics cannot depend on an external 110/230 VAC auxiliary feed that might drop out during bus transfers. The MVC3003-4003 solves this by deriving its input power straight from the MV3000 DELTA DC bus. Built around the 20X4321 (and 20X4321/10 / 20X4321/10E) low-voltage power supply PCB assembly, this module mounts directly onto the front face of an air-cooled or liquid-cooled DELTA Transistor Bridge Module.

Unlike the extended-voltage MVC3003-4030 variant used in renewable energy or specialized marine dynamic-braking setups, the MVC3003-4003A provides standard-accuracy DC link voltage feedback to the controller and enforces a fixed 1172 VDC instantaneous overvoltage trip threshold without a configurable timed overvoltage delay.

Model Details

• Primary Model Number: MVC3003-4003
• Revision / Suffix Variant: MVC3003-4003A / MVC3003-4003-A
• Alternate / Unhyphenated MPN: MVC30034003
• Internal PCB Assembly Codes: 20X4321, 20X4321/10, 20X4321/10E
• Legacy OEM Lineage: ALSTOM Power Conversion → Converteam → GE Power Conversion → Avid Controls
• System Series: ALSPA MV3000 / MV3000e DELTA Drives (575–690 VAC class)

Technical Specifications: CONVERTEAM ALSTOM MVC3003-4003 / MVC3003-4003A

Features

1. Direct High-Voltage DC Link Supply: Operates down to a 560 VDC minimum bus threshold, sustaining controller logic through main AC line sags on 575–690 VAC systems.
2. 110 W Regulated Control Output: Delivers 110 W of isolated low-voltage DC power across the 40-way ribbon bus to drive IGBT gate-drive circuits and the MVC3001 controller.
3. Hardware Overvoltage Protection: Triggers an instantaneous overvoltage trip at 1172 VDC to protect downstream IGBTs and DC bus capacitors during regenerative braking surges.
4. Standard-Accuracy DC Link Sensing: Feeds real-time DC bus voltage telemetry back to the MV3000e controller for flux vector regulation and undervoltage/overvoltage diagnostics.
5. Bridge-Mounted Form Factor: Attaches directly to the front chassis of air-cooled (MVD) or liquid-cooled (MVDL) transistor bridges, keeping high-voltage DC leads short and minimizing radiated EMI.

Compatible Equipment Models

• Air-Cooled DELTA Transistor Bridge Modules: MVD3xx-x7xx series, MVD5xx-x7xx series, and specifically MVD500-4701
• Liquid-Cooled DELTA Transistor Bridge Modules: MVDLxxxx-x6xxxxxx series, including MVDL800 and MVDL1000 modules
• Drive Controllers: MV3000 / MV3000e Common Drive Controllers (MVC3001-4001, MVC3001-4002, MVC3001-4003, MVC3001-4003-A)
• Peripheral I/O & Ribbon Kits: MVC3002-4001 User I/O Termination Panel, MVS3000-4001 Drive Data Manager Keypad, and MVC3004-4001 / -4002 / -4003 Ribbon Cable Kits

Frequently Asked Questions

What is the difference between the MVC3003-4003 and the MVC3003-4003A?

The MVC3003-4003 and MVC3003-4003A (also listed as MVC3003-4003-A) are electrically and mechanically identical. The “A” suffix denotes a standard hardware revision batch introduced during Converteam and Avid Controls lifecycle production. Both units use the 20X4321 power supply PCB, operate from a 560 VDC minimum bus on 575–690 VAC systems, deliver 110 W output power, and trip at 1172 VDC.

Can I replace an MVC3003-4001 or MVC3003-4002 with an MVC3003-4003?

No. The MVC3003-4001 and MVC3003-4002 are built exclusively for 380–525 VAC MV3000 DELTA drives, with lower minimum operating voltages (400 VDC and 450 VDC) and lower overvoltage trip thresholds (784 VDC and 882 VDC). Installing an MVC3003-4003 into a 400–480 VAC drive will cause improper undervoltage lockout and inaccurate DC link voltage scaling in the controller.

Can the MVC3003-4003A replace an MVC3003-4030 in a marine drive?

Not directly without engineering verification. While both fit 575–690 VAC DELTA transistor bridges, the MVC3003-4030 includes a 20X4344 daughterboard that provides high-accuracy DC link feedback, a higher 1262–1275 VDC overvoltage trip ceiling, and a user-configurable timed overvoltage trip delay required for regenerative marine propulsion and wind applications.

How does the MVC3003-4003 receive its input power?

It does not use an external AC control transformer. Instead, it connects directly to the DELTA Transistor Bridge’s high-voltage DC bus via the TB1 3-way AMP Mate-N-Lok connector (Pin 1 = DC+, Pin 2 = N/C, Pin 3 = DC-) and converts that high-voltage DC into regulated 110 W low-voltage rails sent over the 40-way ribbon cable at PL22.

What is the required safety discharge time before servicing the MVC3003-4003?

You must isolate all AC and DC power sources to the MV3000 drive cubicle and wait a minimum of 8 minutes for the DC link capacitors to discharge. Always measure across DC+ and DC- with a rated voltmeter before disconnecting the TB1 high-voltage plug or the 40-way ribbon cable.