Parallel connections of conductors
If several residual current monitoring relays are installed in one network, a conductor routed
through several residual current transformers must not be connected to itself downstream of
the transformer, as this would eectively represent a parallel connection of the conductor. This
fault occurs particularly often with neutral conductors. This fault causes the currents to be
distributed across the conductor. This means that the current owing through the load to be
monitored is no longer 100 % of the total current and all integrated monitoring relays measure
fault currents.
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9
Accessories
13.2 Accessories for 3UG4 monitoring relays
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 257
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