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13 

 

6

 

Technical Data

 

 

Technical Data

 

Details

 

Input 

Voltage range (Un) 

100 

 400 V (L-L) main voltage (nominal)

 

 

Measuring range

 

 520 V TRMS L-L 50/60 Hz or 

1 - 520 V TRMS L-

L 16⅔ Hz

 

 

Configurable measuring range

 

0 - 500 V L-L / 0 - 300 V L-N 

 

Frequency

 

50/60 Hz (

10…40….70…120 Hz

16

 Hz (

10…15….18…120 Hz

 

Overload voltage

 

1.5 x Un 

 continuously, 2 x Un 

 10 s 

 

Consumption

 

U x 1 mA / phase 

 

Current (In) 

 5 A 

 

Measuring range 

5 mA 

 10 A TRMS 

 

Configurable measuring range 

 10 A 

 

Overload current 

2 x In continuously, 10 x In 15 s, 40 x In 1 s 

 

Consumption 

<0.05 VA / phase 

 

Auxiliary power supply 

24 

 230 VDC / 90 

 230 V AC ±10 % 

 

Burden 

max 7.1 W / 15 VA 

Output 

Analog outputs 

4 or 2 

 

Programmable range 

±20mA, ±5 mA, ±10V (settings within the range)* 

 

Resolution  

16 bits 

 

External resistance load 

Current output: max 750 

Ω (15

 V) 

Voltage output: min 750 

Ω

 

 

Response time 

<100 msec 

 

Digital Outputs 

2 (Energy pulse output) 

 

Communication 

Modbus RS485 (RTU) 

General Data 

Accuracy 

0.2 (Ref. temp. 23 °C) 

 

Galvanic isolation 

Supply, in- and output are galvanically isolated 

 

Connection terminals / Torque 

Input and Auxiliary power supply: 6 mm

/ 0.8 Nm 

Output: 2.5 mm

/ 0.5 Nm 

 

Humidity 

95 % non-condensing 

 

USB 

USB Micro-B, port for configuration 

 

Temperature 

-

10…+55 °C (operation)

 

-

40…+70 °C (storage) 

 

Temperature coefficient < 0.1 % / 10 °C 

 

Test voltage 

4 kV AC /1 min 

 

Inputs 

overvoltage cat. III 

 

Pollution degree 

 

Dimension (W x H x D) 

70 x 132 x 101 mm 

 

Weight 

330 gr 

 

Protection 

IP40 (housing), IP20 (terminals) 

 

Standards 

SS-EN 60688 Transducers 

 SS-EN 61010-1 Safety 

 EN 61000-6-2 / -6-4 / -6-5 

*

Depending on the version

 

Summary of Contents for LQT40A

Page 1: ...Rev 2022 09 21 USER MANUAL LQT40A TILLQUIST GROUP AB Box 1120 SE 164 22 Kista Sweden Tel 46 8 594 632 00 info tillquist com www tillquist com...

Page 2: ...ered by one single unit It can measure single phase systems up to 4 wire unbalanced load systems With its 4 analog and 2 digital outputs together with a serial interface RS 485 Modbus LQT40A offers al...

Page 3: ...ction 4 2 3 Connection diagrams System connection 4 3 Measuring 7 3 1 Measured quantities 7 3 2 Meassuring system 8 3 2 1 Phase Locked loop PLL 8 3 2 2 Soft mode 8 3 2 3 Block diagram 8 3 2 4 Frequenc...

Page 4: ...e transducer must be installed near The OFF position shall be clearly marked Attention Danger to life Ensure that all leads are free of potential when connection them Voltage measurements inputs must...

Page 5: ...ed before disconnected 1 7 Maintenance The transducer requires no maintenance Any repairs shall be performed by trained personnel or the equipment shall be returned to the supplier for repair 1 8 Symb...

Page 6: ...on diagram Voltage input UL1 2 UL2 5 UL3 8 N 11 Current input In Out IL1 1 3 IL2 4 6 IL3 7 9 Aux Power Supply 13 14 Analog Output A1 20 21 A2 22 23 A3 24 25 A4 26 27 Digital Output D1 30 31 D2 32 33 M...

Page 7: ...5 4 9 in lbs 2 3 Connection diagrams System connection LQT40A system connection is programmable from single phase to 4 wire balanced or unbalanced connection Configurable System Connection System con...

Page 8: ...01 1 phase 1 element 2 wire Single phase AC 02 1 phase 1 element 3 wire 3 phase symmetric load phase shift U12 I1 03 1 phase 1 element 3 wire 3 phase symmetric load phase shift U23 I1 04 1 phase 1 ele...

Page 9: ...6 05 3 phase 1 element 3 wire 3 phase symmetrical load 09 3 phase 2 elements 3 wire 3 phase asymmetrical load 11 3 phase 3 elements 4 wire 3 phase asymmetrical load...

Page 10: ...ive power factor COS 3 P3 S3 L3 QF Reactive power factor Q S System QF1 Reactive power factor SIN 1 Q1 S1 L1 QF2 Reactive power factor SIN 2 Q2 S2 L2 QF3 Reactive power factor SIN 3 Q3 S3 L3 LF LF fac...

Page 11: ...10 Hz or higher than 120 Hz Measured quantities in soft mode are voltage U current I and frequency F 3 2 3 Block diagram Schematic block diagram of measure process Soft mode 1800 samples second 3 2 4...

Page 12: ...hannel It is possible to set a fixed value for the output Fixed output is useful when testing an installation Off position is the same as 0 mA or V 4 2 Digital outputs Digital output is used to pulse...

Page 13: ...VA Apparent power L3 S1 U1 I3 48 binary32 LF LF factor system LF sign Q 1 PF 50 binary32 LF1 LF factor L1 LF1 sign Q1 1 PF1 52 binary32 LF2 LF factor L2 LF2 sign Q2 1 PF2 54 binary32 LF3 LF factor L3...

Page 14: ...ary32 U12 V Main voltage L1 L2 20 binary32 U23 V Main voltage L2 L3 22 binary32 U31 V Main voltage L3 L1 24 binary32 P W Active power system P P1 P2 P3 26 binary32 Q var Reactive power system Q Q1 Q2...

Page 15: ...table parameters Save and load configuration file Functionality of ConfigLQT ConfigLQT allows the user to See online readings of measured values Adjust the functionality of the outputs Save parameter...

Page 16: ...ange 20mA 5 mA 10V settings within the range Resolution 16 bits External resistance load Current output max 750 15 V Voltage output min 750 Response time 100 msec Digital Outputs 2 Energy pulse output...

Page 17: ...14 70 mm 132 mm Depth Height Width...

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