The marine environment has particular demands that go beyond the typical industrial standard requirements.

Installed on platforms, support vessels or on the seafloor, SCHAEFER offers a wide range of power solutions for the marine industry.

Salt rich and highly corrosive environment coupled with a high level of shock and vibration are dealt with by the SCHAEFER enhancement features. Designed for use in either Hazardous Area 1 or as a RACK insert module, customized & ruggedized rectifiers, converters, inverters and integrated systems operating under extreme conditions providing reliable long life power solutions are the hallmarks of the SCHAEFER product range..

Products for the energy market

  • AC-DC power supplies & battery chargers

  • DC-DC converters

  • Inverters

  • Frequency converters

  • Active harmonic filters
  • Thyristor controlled power supplies & battery chargers


To ensure 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.

Our modules are designed to meet the following standards:

  • EN 50178
  • EN 60664-1
  • EN/ IEC 61010-2-201 / EN/ IEC 61010-1
  • EN 61000-6-2
  • EN 61000-6-4
  • EN 55011 / EN 55022 class A
  • EN 61140

Optional standards, approvals or certifications:

  • KTA

Electrical features

By default, all devices are designed with electronic current limiting, overvoltage protection and continuous short circuit protection.

Optionally, the modules can be equipped 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
  • Programming of output

  • Monitoring & programming via potentiometer, analog signals or RS232 / IEEE488 interfaces
  • 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 extended 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
  • Design for a high level of shock and vibration

  • Tropicalization coating on all circuit boards and components to ensure an increased protection class and to protect the module against extreme climatic conditions

  • Robust enclosure that can withstand wind, sun, salt water, dirt or dust

  • Hermetically sealed enclosure for high protection category