Siemens 3UG4 - Wiring Examples (3 UG462.-.AA30)

3UG4621/3UG4622 current monitoring relays
7.6 Circuit diagrams
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
183
7.6.3
Wiring examples (3UG462.-.AA30)
Note
If this arrangement is not complied with, the monitoring relay may be destroyed and the
short-circuit current may damage the plant!
Operation with a separate control circuit and load current circuit
•
single-phase
•
three-phase
Operation with a common control circuit and load current circuit
•
single-phase
Note
Configuration
In the case of 3UG462.
-.AA30, A2 and M (GND) are internally electrically connected!
If the load to be monitored and
the current monitoring relay are powered from the same
system, terminal A2 is not required!
The load current must always flow away through M (GND), otherwise the current monitoring
relay may be destroyed!