Protection against electric shocks and electrical fires
General
Electric shock
Protection against electric shock
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
Protective measures
Coordination of residual current protective devices
Implementation of the TN system
Preliminary conditions
Protection against indirect contact
High-sensitivity RCDs
Protection in high fire-risk locations
When the fault current-loop impedance is particularly high
Implementation of the IT system
Preliminary conditions
Protection against indirect contact
High-sensitivity RCDs
Protection in high fire-risk locations
When the fault current-loop impedance is particularly high
Residual current differential devices (RCDs)
Types of RCDs
Description
Sensitivity of RDCs to disturbances
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