1
1
Product description
The LQT400 is a configurable 3-phase multi-transducer, capable for measuring any
electrical quantity of a network. It is possible to choose up to 2 of any electrical
quantities and link them to the analog outputs. The configuration is done using our
freeware ConfigLQT via the mini USB-port.
1.1
Technical data
Inputs
Voltage
Input (Un)
100
–
400 V main voltage (nominal)
Measuring range
0
–
500 V TRMS
Overload
1.5 x Un
–
continuously, 2 x Un
–
10 s
Consumption
Un x 1 mA / phase
Frequency
10…
40
…
70
…120 Hz
1
0…
15
…18…120
Hz (option for 16
⅔ H
z)
Current
Input (In)
1
–
5 A
Measuring range
0
–
10 A TRMS
Overload
2 x In continuously, 10 x In 15 s, 40 x In 1 s
Consumption
< 0.05 VA / phase
AUX Supply
Universal current
24 (2W)
–
253VDC (3W) (±5%)
80 (4VA)
–
253VAC (5VA), 50/60 Hz (±5%)
Outputs
Analog
Quantity
2 pcs
Range
+/- 20 mA
Load
max 750 ohm (15V)
Response time
< 100 ms
General data
Accuracy class
0.2
Overvoltage category
CAT III
Max rated values
519 V (L-L) / 300 V (L-N), 10 A
Galvanic insulation
All connections are galvanically separated
USB
1 pc for configuration
Temperature range
-10 to +55 °C (operation), -40 to +70 °C (storage)
Temperature coefficient < 0.1% / 10 °C
Humidity
< 80%
Test voltage
4 kV, 50 Hz, 1 min.
Pollution degree
2
IP Class
Housing IP40, terminals IP20
Dimensions (W x H x D)
70 x 132 x 137 mm
–
DIN-rail
Mounting
Indoors - Up to 2000 meters height
Weight
~0.5 kg
Standards
SS-EN 60688 Transducers
SS-EN 61010-1, 61010-2-030 Safety
EN 61000-6-2, -6-4, -6-5 EMC
