Shipboard Power Supply and Subsea Power Supply Solutions

shipboard power supply Schaefer has nearly five decades of expertise in the design, manufacturing, and integration of subsea power supply and shipboard power supply products into reliable and efficient oceanographic power systems. Our experienced team can modify an exiting product from our diverse product line that includes high power dc-dc converters, ac-dc power supplies, battery chargers, active harmonic filters, dc-ac inverters and frequency converters or design a custom product to meet your shipboard and subsea power supply requirements.

Our subsea power supplies and shipboard power supplies are used to supply power to compressors, pumps and other electrical components used in offshore, onshore, shipboard in both shallow and deep water subsea installations. Schaefer’s power products will meet international standards for harsh environment and extreme temperature shifts that will be encountered in the shipboard and subsea industry.

All of our power products can be mounted on benches, racks or ruggedized frames and are available in multiple input/output configurations. Below is a list of typical ship and subsea power applications:

  • Underwater Observatories (Neptune & Venus)
  • Underwater Oil/Gas Systems
  • Underwater Communication Systems
  • Underwater Drives/UPS systems
  • Underwater Dive Suit Power
  • Underwater ROV/ Subs
  • Underwater Warfare Power Systems
  • Ship Power Systems
  • Ship Topside Systems
  • Ship Drives Systems
  • Ship UPS Systems
  • Ship Active Harmonic Systems

Shipboard and Subsea Military Applications

Schaefer adheres to MIL-STD-1399, MIL-STD-461, MIL-STD-901D/E, MIL-STD-167, Mil-STD-1332, and other required standards for use on military shipboard environments. We design precision-engineered power supplies that meet the requirements of the defense industry. Visit our military page to learn more…

Heavy Industrial – Energy Storage for Ships, Barges, and Docks.

Shipboard and Subsea Standards and Features

  • AC / DC power supplies & battery chargers
  • DC / DC converter
  • DC / AC inverter
  • AC / AC frequency converter
  • Active harmonic filters
  • Electronic load

To ensure a high reliability and quality of our power supplies, they have to pass through internal testing for high industrial requirements. Furthermore, they can be tested against increased shock and vibration resistance, as well as extreme environmental conditions. All components are selected according to criteria of durability, availability and performance. According to customer requirements national and international standards can be tested in cooperation with external laboratories.

  • EN 50178
  • EN 60664-1
  • EN 60950-1
  • EN 61000-6-2
  • EN 61000-6-4
  • EN 55011 / EN 55022 class A
  • EN 61140

By default, all devices are designed with electronic current limiting, overvoltage protection and continuous short circuit protection. Optionally, the modules can be expanded as follows:

  • Inrush current limiting
  • Reverse polarity protection for DC input
  • Decoupling diode for redundant / parallel operation
  • Active current sharing for parallel operation
  • Hot-pluggable solutions
  • Monitoring of input and output voltage
  • Output programmable
  • Power factor correction (PFC) for single phase input
  • Temperature compensated charging voltage
  • Automatic / manual selection of charging characteristics
  • Remote ON / OFF (inhibit)

By default, all modules will be offered as a 19″ module or 19″ sub-rack according to IP20.  Optionally, the modules can be expanded as follows:

  • Wall mount, chassis mount, DIN-rail mount, 19″ rack or customized design
  • Fan or liquid cooled
  • Mating connectors, wiring and monitoring instruments in accordance to the customers’ requirements
  • Digital or analog V- and A-meters
  • Monitoring & programming via potentiometer, analog signals or RS232 / IEEE488 interfaces
  • Designed for a high level of shock and vibration
  • Tropical protection finish on all circuit boards and components to ensure an increased protection category to protect the module from extreme climatic conditions
  • Robust enclosure that can withstand wind, sun, salt water, dirt or dust.
  • Hermetically sealed enclosure for high protection category
Ship/Sub-Sea Products
  • AC / DC power supplies & battery chargers
  • DC / DC converter
  • DC / AC inverter
  • AC / AC frequency converter
  • Active harmonic filters
  • Electronic load
Engineering Standards

To ensure a high reliability and quality of our power supplies, they have to pass through internal testing for high industrial requirements. Furthermore, they can be tested against increased shock and vibration resistance, as well as extreme environmental conditions. All components are selected according to criteria of durability, availability and performance. According to customer requirements national and international standards can be tested in cooperation with external laboratories.

  • EN 50178
  • EN 60664-1
  • EN 60950-1
  • EN 61000-6-2
  • EN 61000-6-4
  • EN 55011 / EN 55022 class A
  • EN 61140
Electrical Features

By default, all devices are designed with electronic current limiting, overvoltage protection and continuous short circuit protection. Optionally, the modules can be expanded as follows:

  • Inrush current limiting
  • Reverse polarity protection for DC input
  • Decoupling diode for redundant / parallel operation
  • Active current sharing for parallel operation
  • Hot-pluggable solutions
  • Monitoring of input and output voltage
  • Output programmable
  • Power factor correction (PFC) for single phase input
  • Temperature compensated charging voltage
  • Automatic / manual selection of charging characteristics
  • Remote ON / OFF (inhibit)
Mechanical Features

By default, all modules will be offered as a 19″ module or 19″ sub-rack according to IP20.  Optionally, the modules can be expanded as follows:

  • Wall mount, chassis mount, DIN-rail mount, 19″ rack or customized design
  • Fan or liquid cooled
  • Mating connectors, wiring and monitoring instruments in accordance to the customers’ requirements
  • Digital or analog V- and A-meters
  • Monitoring & programming via potentiometer, analog signals or RS232 / IEEE488 interfaces
  • Designed for a high level of shock and vibration
  • Tropical protection finish on all circuit boards and components to ensure an increased protection category to protect the module from extreme climatic conditions
  • Robust enclosure that can withstand wind, sun, salt water, dirt or dust.
  • Hermetically sealed enclosure for high protection category

Active Harmonic Filter for Ship & Sub-Sea

Active Harmonic Filter System work to eliminate harmonic oscillations and consequently costs for reactive energy. The filter monitors the current signal and compensates for the unwanted elements of the measured current. Thus, the filter ensures a harmonic suppression independently of the number of loads. Furthermore the filter corrects the power factor, improving the system efficiency while reducing harmonic pollution.

COTS, MOTS and Custom Subsea Power Supply Solutions

With nearly 50 years of experience and thousands of custom designed power products, you can rely on Schaefer’s engineering and manufacturing expertise for your specific application needs. Our COTS power converters can be built into sealed high IP rated enclosures with increased mechanical strength and hermetically sealed MIL connectors. We can optimize our standard products by installing them into custom enclosures and adding meters, switches or any other functionality you require, with little or no NRE!

Research and testing are provided for:

  • Thermal Analysis
  • FMECA
  • Halt
  • Hass
  • Loop Stability/Optimization
  • MTBF, FIT, PDR, and CDR

Schaefer’s electrical and mechanical engineering teams are true industry craftsmen, contact us to discuss your shipboard and subsea power supply requirements or to request a quote.

Latest Projects

Additional Examples of Schaefer’s Custom Power Solutions

Our experienced engineering and manufacturing team has delivered over 2,000 custom power solution products. To learn more about our custom solutions click on the button below.

Menu