48V On-board Power Network

An on-board electrical system running at 48 V gives vehicle manufacturers a cost-effective way to lower CO2 emissions from vehicles, as well as introducing powerful new technologies into cars and lorries. Use of 48-V lithium-ion batteries in parallel with a traditional 12-V on-board network, does however mean that a whole new voltage level is introduced into motor vehicles, which also means new challenges for mechanics in vehicle workshops. It is often forgotten that some systems assigned to a 48-V network could also come into a high-voltage category under certain circumstances. This specifically applies, for example, to the three-phase motors used in active roll stabilisation systems.

Vehicle mechatronics technicians then not only need to know about the design and networking of a such an on-board sub-network, but also all of the safety regulations needed to ensure safe and professional working. In order to meet these new demands, we have developed a suitable new UniTrain course.

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UniTrain: 48V Sub-Systems in On-Board Vehicle Networks

The UniTrain course "48V on-board network" describes the full structure of a 48V sub-system for an on-board power network and how it is incorporated into the rest of the vehicle with the help of intricate animations and targeted theory. Safety-related skills are fostered by means of numerous practical exercises where trainees have to use various methods to isolate the 48-V system, for example. A special focus is put on the fault case scenerio, if the shutdown procedure cannot be performed correctly. The package is rounded off with built-in interactive fault simulation, which helps to convey the necessary diagnostic capabilities.

Training contents

• Design of a 48-V on-board sub-network
• Integration into vehicles
• Typical 48V components
• Isolation of 12V/48V on-board network
• Sample applications
• Circuit diagrams for 48-V on-board sub-networks
• Isolating/disconnecting 48-V on-board sub-networks
• Safety procedures for diagnostic work
• Diagnostics 

Includes:

• "48-V sub-network" training system
• Built-in fault simulation
• Interactive e-learning course including theory and practical experiments

Additionally Required

Multi13S Digital Multimeter

Universal precision lab multimeter and temperature meter with IR interface for high-quality, universal measurement and testing in educational settings, power plants, process control installations etc.

• 3¾-digit multimeter; resolution: ±3,100 digits
• Measurement classification CATII-1000 V
• Can be connected to UniTrain system via IR interface
• Voltage and current measuring ranges: 30 mV-1000 V DC, 3 V-1000 V AC; 3 mA-16 A DC; 30 mA-10 A AC
• Resistance ranges: 30 ohm-30 Mohm
• Special functions: °C for temperature measurements using PT100/1000 thermocouple (optional accessory)
• Continuity and diode testing
• Automatic range selection and battery shut-off, min./max. and data hold function
• Safety fuse for current measurement range up to 300 mA
• Protection against high currents in the mA range for nominal voltage of 1000 V
• Display with bar chart and backlighting
• Includes protective sleeve, measuring leads, 1 x spare fuse, 9V battery, calibration certificate