First edition 2004, 120 pages, DIN A5
Fault Current Monitoring with the method of residual current measurement in electrical
installations is a new method of preventive maintenance. Often suitable devices
are applied to detect insulation faults early in order to prevent break-down times
of the electrical installation due to insulation faults and hence reduce the cost-factors
for business and industry. Monitoring with residual current monitor (RCM) according
to IEC 62020, enables the detection of residual currents due to insulation faults
in the early stages. In modern electrical power supply systems specially designed
residual current monitors (RCM) are able to detect residual AC and DC currents.
This means that it is now possible to measure insulation faults with fractions of
direct voltage in AC systems as well as insulation faults in pure DC systems and
to indicate and give warning when the critical value has been exceeded. For the
information of the operator and user of electrical installations, residual current
monitors (RCM) are often equipped with LED-displays, which indicate the respective
residual current mostly in relation to the operate value. RCMs can be applied in
addition to other known protective devices. This book describes applications and
methods of measuring with residual current monitors (RCMs) in AC and DC systems.
This book also contains many references to International Standards IEC 62020, IEC
61140, IEC 60364-4-41 and more.