
System overview
3.5 Overview of the functions
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
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3.5.2
3UG45 / 3UG46 monitoring relays
Table 3- 17 Functions of the 3UG45/3UG46 monitoring relays for analog and digital setting
Function
Monitoring relays
3UG45
3UG46
01 11 12
13
8 14 15 16 17 18 31 32 33 21 22 41 25 51
Line monitoring and voltage monitoring
Monitoring for phase
sequence
—
✓
✓
✓
—
✓
✓
✓
✓
✓
— — — — — — — —
Monitoring for phase
failure
—
○
1)
✓
✓
—
✓
✓
✓
✓
✓
— — — — — — — —
Monitoring for
asymmetry
— — 10 % 20 % —
✓
○
2)
○
2)
✓
✓
— — — — — — — —
Monitoring for
undervoltage
— — —
3p
— 3p 3p 3p 3p 3p 1p 1p 1p — — — — —
Monitoring for
overvoltage
— — —
—
— — 3p 3p 3p 3p 1p 1p 1p — — — — —
Monitoring for N
conductor
failure
— — —
—
— — —
✓
—
✓
— — — — — — — —
Automatic direction of
rotation correction in the
case of incorrect phase
sequence
— — —
—
— — — —
✓
✓
— — — — — — — —
Power factor monitoring and current monitoring
Monitoring for
undercurrent
— — —
—
— — — — — — — — — 1p 1p 1p — —
Monitoring for
overcurrent
— — —
—
— — — — — — — — — 1p 1p 1p — —
Active current
monitoring
— — —
—
— — — — — — — — — — —
✓
— —
Apparent current
monitoring
— — —
—
— — — — — — — — —
✓
✓
— — —
Power factor monitoring — — —
—
— — — — — — — — — — —
✓
— —
Fault current monitoring/insulation monitoring
Monitoring for fault
current/ground fault
— — —
—
— — — — — — — — — — — —
✓
—
Insulation monitoring
— — —
—
✓
— — — — — — — — — — — — —
Filling level monitoring
Monitoring for filling level
overshoot / resistance
overshoot
✓
— —
—
— — — — — — — — — — — — — —
Monitoring for filling level
undershoot / resistance
undershoot
✓
— —
—
— — — — — — — — — — — — — —