Datasheet

Monitoring Relays
61
Siemens · 2010
3UG Monitoring Relays for Electrical and Additional Measurements
Line monitoring
3UG46 15/3UG46 16 monitoring relays
The 3UG46 15/3UG46 16 line monitoring relay has a wide volt-
age range and an internal power supply. The device is equipped
with a display and is parameterized using three buttons. The
3UG46 15 device monitors three-phase networks with regard to
phase failure, undervoltage, overvoltage and phase sequence.
The 3UG46 16 monitoring relay monitors the neutral conductor
as well. The hysteresis is adjustable from 1 ... 20 V. In addition
the device has two separately adjustable delay times for over-
voltage and undervoltage from 0 .. 20 s in each case. If the di-
rection is incorrect, the device switches off immediately. Thanks
to a special measuring method, a phase failure is reliably de-
tected in spite of the wide voltage range from 160 ... 690 V AC
and feedback through the load of up to 80 %.
The 3UG46 15/ 3UG46 16 monitoring relay can be operated on
the basis of either the open-circuit or closed-circuit principle and
with manual or auto RESET.
With the closed-circuit principle selected
Wrong phase sequence
Phase failure
Undervoltage
Overvoltage
3UG46 17/3UG46 18 monitoring relays
The 3UG46 17/ 3UG46 18 line monitoring relay has an internal
power supply and can automatically correct a wrong direction of
rotation. Thanks to a special measuring method, a phase failure
is reliably detected in spite of the wide voltage range from
160 ... 690 V AC and feedback through the load of up to 80 %.
The device is equipped with a display and is parameterized us-
ing three buttons. The 3UG46 17 line monitoring relay monitors
three-phase networks with regard to phase sequence, phase
failure, phase unbalance, undervoltage and overvoltage. The
3UG46 18 monitoring relay monitors the neutral conductor as
well. The hysteresis is adjustable from 1 ... 20 V. In addition the
device has delay times from 0 ... 20 s in each case for overvolt-
age, undervoltage, phase failure and phase unbalance. The
3UG46 17/ 3UG46 18 monitoring relay can be operated on the
basis of either the open-circuit or closed-circuit principle and
with manual or auto RESET. The one changeover contact is used
for warning or disconnection in the event of power system faults
(voltage, unbalance), the other responds only to a wrong phase
sequence. In conjunction with a contactor reversing assembly it
is thus possible to change the direction automatically.
With the closed-circuit principle selected
Phase failure
Undervoltage
Overvoltage
Unbalance
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L3-L2-L1
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L1-L2-L3
L1-L2-L3-N
L2-L3
L1-L2-L3
L1-L2-L3
L1-L2-L3-N
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x-y
Hysteresis
Delay
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<
x-y
Hysteresis
Delay
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L1-L2-L3
L1-L2-L3-N
L2-L3
L1-L2-L3
L1-L2-L3
L1-L2-L3-N
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<
x-y
Hysteresis
Delay
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x-y
>
Hysteresis
Delay
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> Asy
0 %
Hysteresis
2 %
Delay