3UG4622-1AW30 Datasheet, PDF (64/114 Pages) List of Unclassifed Manufacturers – Monitoring and Control Devices

Monitoring Relays
3UG Monitoring Relays for Electrical and Additional Measurements
Line monitoring
3UG45 13 monitoring relays
The 3UG45 13 line monitoring relay monitors three-phase
networks with regard to phase sequence, phase failure, phase
unbalance of 20 % and undervoltage. The device has an internal
power supply and works using the closed-circuit principle. The
hysteresis is 5 %. The integrated response delay time is
adjustable from 0 to 20 s and responds to undervoltage. If the
direction is incorrect, the device switches off immediately.
Thanks to a special measuring method, a phase failure is reliably
detected in spite of the wide voltage range from 160 to 690 V AC
and feedback through the load of up to 80 %. When the mains
supply is switched on, the green LED is lit. If the phase
sequence at the terminals L1-L2-L3 is correct, the output relay
picks up. If the phase sequence is wrong, the red LED flashes
and the output relay remains in its rest position. If a phase fails,
the red LED is permanently lit and the output relay drops.
Note:
The red LED is a fault diagnostic indicator and does not show the
current relay status. The 3UG45 13 monitoring relay is suitable
for line frequencies of 50/60 Hz.
Phase failure and undervoltage
L1-L2-L3
3~U _n
L2-L3 L1-L2-L3
11/14
11/12
21/24
21/22
LED rd
-20%
Hysteresis
5%
NSB0_01569
3UG46 14 monitoring relays
The 3UG46 14 line monitoring relay has a wide voltage range
and an internal power supply. The device is equipped with a
display and is parameterized using three buttons. It monitors
three-phase networks with regard to phase unbalance from 5 to
20 %, phase failure, undervoltage and phase sequence. The
hysteresis is adjustable from 1 to 20 V. In addition, the device
has a response delay and ON delay from 0 to 20 s in each case.
The integrated response delay time responds to phase
unbalance and undervoltage. If the direction is incorrect, the
device switches off immediately. Thanks to a special measuring
method, a phase failure is reliably detected in spite of the wide
voltage range from 160 to 690 V AC and feedback through the
load.
The 3UG46 14 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
L3-L2-L1
11/14
11/12
21/24
21/22
Phase failure
L1-L2-L3
L2-L3 L1-L2-L3
OFF
ON
Phase loss
OFF
Delay
Wrong phase sequence
ON
OFF
L3-L2-L1
11/14
11/12
21/24
21/22
LED rd
11/14
11/12
21/24
21/22
Undervoltage
<
x-y
11/14
11/12
Hysteresis
OFF FLASH OFF
Phase sequence
21/24
21/22
onDelay
Unbalance
Delay
Hysteresis
> Asy
2%
0%
11/14
11/12
21/24
21/22
onDelay
Delay
7/64
Siemens LV 1 T · 2006