+31 6 838 507 23 jeroen@jvissers.com
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In the field

Client and vessel names stay confidential. The work itself I can show: what the installation was, what was wrong or what was needed, and what I did about it.

  • Switchboard room with cabinets, a laptop and parts on the table

    Utility · Grid support

    Grid support generator

    Peak shaving, standby power and seamless synchronisation during critical operations. Both frequency and voltage are controlled, keeping reactive power (kVAr) to a minimum. When loads get too enthusiastic, the system automatically sheds non-critical consumers and keeps the essentials running.

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  • Grey wall cabinet with the door open, showing terminals and breakers

    Marine · Grid converters

    50 to 60 Hz grid converter

    50 Hz is used in most parts of the world, but not everywhere. This grid converter reliably supplies 10 kW at 208/120 V, 60 Hz, with a minimal footprint and minimal losses.

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  • Frequency drive with the cover off and a multimeter clamped to the terminals

    Marine · Power drives

    New bow thruster drive

    One of the vessel's two bow thruster drives had failed. I installed a new drive and improved the response of both by moving from speed limiting to torque control.

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  • Davit on deck, with ships on the water behind it

    Offshore · Lifting equipment

    Davit overhaul

    After ten years of service at sea, any equipment needs an overhaul. I resealed the cylinders, replaced the hoses…

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  • Display of a Bender iso685 insulation monitor

    Marine · Battery vessels

    Battery system troubleshooting

    Battery systems keep getting bigger, and so do the control systems behind them: complex, and sensitive to faults. The devil is in the details.

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  • Laptop on a rack in an engine room, frequency drives on the wall

    Marine · Government fleet

    10-year refit: new VFDs

    Six government fleet vessels received their 10-year refit. I replaced and programmed all drives on each vessel and optimised the drive settings to improve the behaviour…

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  • Four frequency drives mounted on a stainless steel wall

    Industrial · Power drives

    Drive optimisation

    A frequency drive used only as a soft starter is a waste of money. By changing just a few parameters, the equipment now responds faster.

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  • Yellow generator set in an engine room, the alternator in the foreground

    Offshore · Power generation

    Generator replacement

    Replacing a generator is more than placing it behind an engine and connecting the wires. It involves alignment with preload, epoxy chocking…

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  • Close-up of a MOXA NPort serial device server with its status LEDs

    Marine · Harbour tug

    Adding NMEA equipment

    On a vessel, you can never have enough data. I installed a MOXA multiplexer that distributes the vessel's NMEA data to every system that needs it…

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  • Victron Argodiode battery isolator with red cables connected

    Industrial · Control system

    Increasing 24 Vdc reliability

    A power supply is only as reliable as its source. To make the 24 Vdc supply more dependable, I added 24 V batteries and a Victron diode isolator.

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  • Power analyser held in front of a panel

    Industrial · Preventive maintenance

    Inspections

    Maintenance is more than changing a filter. A good inspection tells you what is about to fail before it breaks down.

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Why there are no names here

A meaningful share of my work involves proprietary control systems, prototype installations or operationally sensitive data. I treat confidentiality the way I treat safety: non-negotiable. NDA by default. That is why these pages describe the work and not the client.

Talk to me about a similar job

Tell me what is going on and when you need someone on site. I respond personally, usually within one working day.

Discuss your project jeroen@jvissers.com