Protection against electric shocks and electrical fires

Electrical protection of persons

Electric shock

Fundamental rule of protection

Direct and indirect contact

Protection against direct contact

Measures of protection against direct contact

Additional measure of protection against direct contact

Protection against indirect contact

Measures of protection: two levels

Automatic disconnection for TT system

Automatic disconnection for TN systems

Automatic disconnection on a second fault in an IT system

Measures of protection against direct or indirect contact without automatic disconnection of supply

Protection of goods in case of insulation fault

Measures of protection against fire risk with RCDs

Ground Fault Protection (GFP)

Implementation of the TT system

TT system - Protective measures

TT system - Coordination of residual current protective devices

Implementation of the TN system

TN system - Preliminary conditions

TN system - Protection against indirect contact

TN system - High-sensitivity RCDs

TN system - Protection in high fire-risk locations

TN system - When the fault current-loop impedance is particularly high

Implementation of the IT system

IT system - Preliminary conditions

IT system - Protection against indirect contact

IT system - High-sensitivity RCDs

IT system - Protection in high fire-risk locations

IT system - When the fault current-loop impedance is particularly high

Residual current differential devices (RCDs)

Description of RCDs

Types of RCDs

Sensitivity of RCDs to disturbances

Downloads

2010 edition in English: F-Protection against electric shocks
2010 edition in French:
F-La protection contre les chocs electriques 1
F-La protection contre les chocs electriques 2

External links

• Electrical Engineering blog