PD IEC/TR 62066:2002
Current
The latest, up-to-date edition.
Surge overvoltages and surge protection in low-voltage a.c. power systems. General basic information
Hardcopy , PDF
English
24-06-2002
Foreword
1 Scope
2 Reference documents
3 Definitions
4 Overvoltages in low-voltage systems
5 Lightning overvoltages
5.1 General
5.2 Origin of lightning surge overvoltages
5.3 Lightning surges transferred from MV systems
5.4 Surges caused by direct flash to LV lines
5.5 Lightning surges induced into LV systems
5.6 Examples of induced overvoltages
5.7 Overvoltages caused by flashes to the
structures or in close vicinity
5.8 Recapitulation on lightning overvoltages
6 Switching overvoltages
6.1 General
6.2 Operation of circuit-breakers and switches
6.3 Operation of fuses
6.4 Frequency of occurrence
6.5 Interactions with surge-protective devices
6.6 Recapitulation on switching overvoltages
7 Temporary overvoltages
7.1 General
7.2 Magnitude of temporary overvoltages due to MV
and LV faults
7.3 Temporary overvoltages due to defects in the LV
electrical installation
7.4 Probability of occurrence and severity of harm
7.5 Recapitulation on temporary overvoltage
8 System interaction overvoltages
8.1 General
8.2 Interaction between power system and communications
system
8.3 Other interactions
8.4 Recapitulation on system interactions
9 Observations on surge overvoltages and failure rates
9.1 General
9.2 Using field failure data
9.3 Recapitulation of observations on failure rates
10 Considerations on system outage/equipment failure/fires
10.1 General
10.2 Avoiding interference in system operation
10.3 Preventing permanent damage
10.4 Costs of surge-related interruptions and failures
10.5 Recapitulation on outages and failures
11 Considerations on the use of surge protection
11.1 General
11.2 Power system configuration
11.3 Types of installation
11.4 Occurrence of surges
11.5 SPD disconnector
11.6 Risk assessment
11.7 Recapitulation on the need for surge protection
12 Surge protection application
12.1 General
12.2 Surge protective devices in power distribution
systems
12.3 Basic system characteristics for SPD selection
12.4 Considerations for installation of SPDs
12.5 Coordination among SPDs and with equipment to be
protected
12.6 Recapitulation on surge protection application
Annex A (informative) Complementary information on
lightning-related overvoltages
Annex B (informative) Switching overvoltages
Annex C (informative) Complementary information on
temporary overvoltages
Annex D (informative) Complementary information on
system interaction overvoltages
Annex E (informative) Complementary information on SPD
application
Annex F (informative) Avoiding overvoltages through
good practice for earthing and cabling
Bibliography
Figures
Tables
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