The above-listed items concern primarily the safety electrical installations.
Particular attention should given earth fault currents and leakage current.6 Cross-section conductors
The cross-section conductors shall determined according to:
a) their admissible maximum temperature,
b) the admissible voltage drop,
c) the electromechanical stress likely occur due short-circuits,
d) other mechanical stresses which the conductors can exposed,
e) the maximum impedance with respect the functioning the short-circuit protection.
6.7 Protection against overcurrent
Persons livestock shall protected against injury and property shall protected against
damage due excessive temperatures electromechanical stresses caused any overcurrents
likely arise live conductors.8 Protection against fault currents
Conductors, other than live conductors, and any other parts intended carry fault current
shall capable carrying that current without attaining excessive temperature. Cross-
sectional areas greater than those required for safety may desirable for economic operation.
This protection can achieved one the following methods:
− automatic disconnection the occurrence overcurrent before this overcurrent attains a
dangerous value, taking into account its duration;
− limiting the maximum overcurrent safe value and duration.
.
6.9 Protection against overvoltage
Persons livestock shall protected against injury and property shall protected against
any harmful effects consequence fault between live parts circuits supplied different
voltages.4.
The protective devices shall operate values current, voltage and time, which are suitably
related the characteristics the circuits, and the possibilities danger., protection against the effects of:
− overcurrent (overload current, short-circuit current),
− earth-fault current,
− overvoltage,
− undervoltage and no-voltage.4.4.
6.
6.g.CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT
64
The characteristics protective equipment shall determined with respect their
function, which may be, e.4
