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Summary of Contents for TILLQUIST LQT40S
- Page 1 USER MANUAL LQT40S TILLQUIST GROUP AB Box 1120 SE-164 22 Kista Sweden Tel: +46 8 594 632 00 info@tillquist.com www.tillquist.com Rev. 0.3 2023-01-31...
- Page 2 AC current and voltage (True RMS) are covered 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, LQT40S offers almost unlimited possibilities.
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Page 3: Table Of Contents
Table of contents Instructions ............................1 1.1 Purpose of this document ........................ 1 1.2 Mounting ............................1 1.3 Installation ............................1 1.4 Operation ............................1 1.5 Safety ............................... 1 1.6 Warning! ............................2 1.7 Maintenance ............................ 2 1.8 Symbols ............................2 1.9 FCC Part 15 information ......................... -
Page 4: Instructions
1 Instructions 1.1 Purpose of this document This document describes how to use the LQT40S multi transducer. The user manual is intended to be used by: • installation personnel and commissioning engineers • service and maintenance personnel • planners 1.2 Mounting The transducer can be mounted on a 35 mm DIN rail according EN50022, on a wall or device cabinet for suitable protection. -
Page 5: Warning
This is especially true for different language versions of this document. This document is regularly reviewed and updated. Necessary corrections will be included in subsequent version and are available via our webpage http://www.tillquist.com. -
Page 6: Connections
2 Connections 2.1 Connection diagram Voltage input Current input Aux Power Supply Analog Output Digital Output 30, 31 32, 33 Modbus RS485... -
Page 7: Electric Connection
Wire stripping: max 8 mm Recommended torque: 0.5 - 0.55 Nm / 4.5 - 4.9 in.lbs 2.3 Connection diagrams – System connection LQT40S system connection is programmable from single phase to 4-wire balanced or unbalanced connection. Configurable System Connection System Application... - Page 8 1-phase 4-wire 1 element 3-phase symmetric load 1-phase 2-wire 1 element Single-phase AC 1-phase 3-wire 1 element 3-phase symmetric load phase-shift U12-I1 1-phase 3-wire 1 element 3-phase symmetric load phase-shift U23-I1 1-phase 3-wire 1 element 3-phase symmetric load phase-shift U31-I1...
- Page 9 3-phase 3-wire 1 element 3-phase symmetrical load 3-phase 3-wire 2 elements 3-phase asymmetrical load 3-phase 4-wire 3 elements 3-phase asymmetrical load...
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Page 10: Measuring
3 Measuring 3.1 Measured quantities Prefix Quantity Calculation System / Phase Input current (I1+I2+I3)/3 System Phase current L1 Phase current L2 Phase current L3 Input voltage (U1+U2+U3)/3 System L1 Phase voltage L2 Phase voltage L3 Phase voltage Active power P1+P2+P3 System Active power L1 Active power L2... -
Page 11: Meassuring System
3.2 Meassuring system 3.2.1 Phase-Locked loop - PLL The measuring system use a phase-locked loop (PLL) between 10-120 Hz. All quantities are being measured. The number of samples per period is deppending of the frequency. 3.2.2 Soft mode A fixed sample rate of 1800 samples/second (soft mode) is used when the frequency is lower than 10 Hz or higher than 120 Hz. -
Page 12: Outputs
4 Outputs 4.1 Analog output The analog outputs can be assigned any measured quantity, see table ”3.1 Measured quantities”. The output is available with three different ranges, ±20 mA, ±5 mA or ±10V. The resolution of the output is 16 bits. 2 to 5 characteristic point can be programmed for each channel. It is possible to set a fixed value for the output. -
Page 13: Modbus Mapping
4.3.2 Modbus mapping Different Modbus protocol profiles are available, depending of needs and the update frequency of data. Modbus protocol profile Mapping 001 The output registry for the measured quantities is updated every 100 ms with profile mapping 001. format parameter explanation 0 binary32... - Page 14 Modbus protocol profile Mapping 002 The output registry for the measured quantities is updated every 25 ms with profile mapping 002. format parameter explanation 0 binary32 Frequency system 2 binary32 Input current system I = (I1+I2+I3)/3 4 binary32 Phase current 6 binary32 Phase current 8 binary32...
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Page 15: Commissioning
5 Commissioning 5.1 Programming of the transducer ”ConfigLQT” is a free configuration software, it is availible for download from Tillquist homepage, www.tillquist.com. The software connects to the transducer and make it possible to change the configuration of adjustable parameters and to visualize live readings. -
Page 16: Technical Data
6 Technical Data Technical Data Details Input Voltage range (Un) 100 – 400 V (L-L) main voltage (nominal) 1 – 520 V TRMS L-L 50/60 Hz or Measuring range 1 - 520 V TRMS L-L 16⅔ Hz Configurable measuring range 0 - 500 V L-L / 0 - 300 V L-N 50/60 Hz (10…40….70…120 Hz) Frequency... -
Page 17: Ordering Codes
7 Ordering Codes LQT40S- Number of Analog Outputs Number of Digital Outputs Serial communication RS485 - Modbus Range of Analog Outputs ± 20mA ± 5mA ± 10V Frequency 50/60 Hz 16⅔ Hz Other Requirements Standard configuration Customer configuration (to provide ERF)
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