3UG4622-1AW30 Datasheet, PDF (76/114 Pages) List of Unclassifed Manufacturers – Monitoring and Control Devices

Monitoring Relays
3UG Monitoring Relays for Electrical and Additional Measurements
Power factor monitoring
■ Overview
The 3UG30 14 power factor monitoring device enables the load
monitoring of motors.
■ Function
The 3UG30 14 monitoring relay is used for monitoring the load of
motors by measuring the phase angle between voltage and
current, i.e. the power factor. The output relays respond as long
as the power factor lies between the upper and lower thresholds.
These are set separately on the front using two potentiometers.
When the value of the power factor lies outside this range, the
corresponding output relay will drop after a delay time T1, that
can be set on the front, has elapsed. A fixed hysteresis prevents
the output relay from continuously switching on and off when the
measured value is close to the threshold.
The ON-delay T2 can be used to suppress the effects of motor
start-up.
Important
It is important to ensure that the phases are connected in the
correct sequence L1-L2-L3, otherwise the power factor will be
evaluated incorrectly.
■ Technical specifications
Note:
Power factor monitoring relays are connected in series after the
motor contactor to ensure that the delay time for bridging start-
up elapses after switch-on. For this reason, the output relay must
not be connected in series with the supply voltage of the motor
contactor, otherwise it would not be possible to switch on the
load feeder. The minimum current must be at least 0.2 A.
1
N S B 0_01129
2
2
3
cos
4 ^T2
5
T1
T1
1 T h r e s h o ld v a lu e m a x
2 H y s te r e s is
3 T h r e s h o ld v a lu e _{m in}
4 O u tp u t r e la y c o s > c o s _{m a x}
( te r m in a ls 2 1 , 2 2 , 2 4 )
5 O u t p u t r e la y c o s < c o s _{m in}
( te r m in a ls 1 1 , 1 2 , 1 4 )
Type
Load capacity of the output relay
Minimum contact load
Output relay with DIAZED fuse¹⁾
Electrical endurance
Mechanical endurance
Ambient temperature
Connection of conductors
Degree of protection
Vibration resistance
Rated operational current I_e
AC-15/230 V
DC-13/24 V
DC-13/48 V
DC-13/60 V
DC-13/110 V
DC-13/230 V
gl/Gg operational class
Operating cycles
Operating cycles
During operation
During storage
Solid
Finely stranded, with end sleeves
Terminals
Enclosures
acc. to IEC 60068-2-6
1) Short-circuits without any contact welding acc. to DIN VDE 0660,
Part 200.
3UG30/3UG35
A
max. 8
A
3
A
1
A
0.45
A
0.35
A
0.2
A
0.1
mA 5/17 V for a fault of 1 ppm
A
4
1 x 10⁵
2 x 10⁶
°C -20 ... + 50
°C -30 ... + 70
mm² 2 x (0.5 ... 2.5)
mm² 2 x (0.5 ... 1.5)
IP20
IP40
Hz/mm 10 ... 150/0.035
7/76
Siemens LV 1 T · 2006