Experiment Instructions Electrical Safety Measures
English

• Electronics technician in automation technology
• Electronics technician for industrial engineering
• Mechatronics technician
• Electronics technician for buildings and infrastructure systems
• Electronics technician for energy and building services engineering
• Electronics technician for machines and drive technology
• Electrical systems technician
• Electronics technician for devices and systems
• Electronics technician for information and systems technology
• Industrial electrician for industrial engineering
• Industrial electrician, devices and systems

• Notes on handling the Safety Board
• Protection against direct and indirect contact
• Basics
• Effective range of body currents
• Active parts
• Body Protection against direct contact (basic protection)
• Protection against indirect contact (fault protection)
• Fault types
• Residual current IF
• Fault voltage UF
• Maximum permissible touch voltage UL
• Test part
• Direct contact
• Indirect contact and suitable protective measures
• Safety through protective extra-low voltage
• Basics
• Protection classes for electrical equipment
• Definitions
• Regulations for the circuit
• Test section
• Contact voltage UB and residual current IB
• Autotransformer
• Basics
• Experiment section
• Dangers of the autotransformer
• Overcurrent protection devices
• Basics
• G-fuses
• Tripping characteristics and applications of circuit breakers
• Protective measures and mains forms
• The LS switch of the Safety Board
• Test section
• Overcurrent protective devices in the TN-C system Overcurrent protective devices in the TT system
• Summation current transformers
• Basics
• Summation current transformer
• Induced voltage Uind
• Test section
• Currents through the summation current transformer
• Residual-current device
• Basics
• General information
• Functioning of a residual-current device (RCD)
• Test section
• RCD(residual current device)
• Protective measures in the TN system
• Basics
• TN systems
• TT systems
• IT systems
• Protective measures in the systems
• Assignment of protective devices to the systems
• Main equipotential bonding
• Additional equipotential bonding
• Switch-off times
• Voltage limitation in case of earth fault of a phase conductor
• Loop impedance ZS
• Test section
• Earth fault of a phase conductor
• Determination of the loop impedance Z S
• Fault in the TN system
• Protective measures in the TT system
• Basics
• TT system
• Switch-off conditions
• Earthing of the bodies
• Test section
• Testing the RCD
• Tripping behaviour of theRCD as a function of the earthing and fault resistance
• Measuring the earth resistance
• Basics
• General
• Current-voltage measuring method
• Test section
• Earthing via earth resistance RA
• Direct earthing via rod earth electrode
• Protective measures in the IT system
• Basics
• General
• Insulation monitor
• Switch-off conditions
• Test section
• IT system with one fault
• IT system with two faults
• Protective insulation
• Basics
• General
• Protection against direct contact or basic protection (protection against electric shock under normal conditions)
• Safety regulations for insulating sheaths
• Test section
• Insulation faults
• Protective separation
• Basics
• Protective separation
• Conditions for the application of protective separation
• Test section
• Single, double and multiple faults
• Earth electrode
• Basics
• Earth electrode
• Voltage funnel
• Earth voltage UE
• Step voltage US
• Experiment section
• Voltage funnel and step voltage US

Experiment instructions "Electrical safety measures" (incl. CD-ROM)