Protection against electric shocks and electrical fires: Difference between revisions

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==[[General|General]]  ==
==<br> [[General|General]]  ==


==== Electric shock  ====
==== Electric shock  ====

Revision as of 12:07, 5 March 2010

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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