TeSys Tera Motor Management System

Overview

The TeSys Tera Motor Management System (or TeSys Tera system) is part of the TeSys Active range of intelligent relays and motor starters. The TeSys Tera system is designed as a reliable building block for Intelligent Motor Control Centres (iMCCs) to provide complete protection, metering, control, and monitoring capabilities for single-phase or three-phase AC induction motors.

The TeSys Tera system is installed in the low voltage switchgear system and connects the higher level automation system via fieldbus network and the motor feeder.

TeSys Tera system:

• Covers conventional and advanced motor protection, metering, and monitoring in iMCC feeders into single, easy to configure, compact communicating module with a display.

• Provides protection controller for low voltage contactor-controlled motor starter feeders. 

• Provides flexible and modular motor management system for motors with constant speeds in low voltage applications.

Functional Characteristics 

The TeSys Tera system manages: 

• Single-phase or three-phase AC induction motors and heaters rated up to 100 A and 690 V operational voltage, with an integral sensor module.

• Single-phase or three-phase AC induction motors and heaters rated up to 810 A and 690 V operational voltage, with external current transformers.

• The connection between the control system and the motor feeder, increases plant availability.  

• Significant savings to the installation, commissioning, operation, and maintenance. 

• Numerical microprocessor equipped controller that allows to set parameters of the motor according to the application and process requirements. 

Features

The TeSys Tera system provides the following features:

• Configurable overload protection for class 5 to 40 based on current.

• Thermistor based motor protection.

• Imbalance, phase loss protection for current, and voltage input separately.

• Locked rotor or stalled rotor protection.

• Electrical parameter monitoring, such as current, voltage, power, power factor, frequency, harmonics, and energy.

• Monitoring for different motor based parameters, such as operating hours, number of starts, run hours, and so on.

• Communication with PLC or DCS over Modbus RTU,PROFIBUS DP, or EtherNet/IP protocol.

• Records trip data, event, self-diagnostic events with time stamp.

• Different starter configurations, such as overload, direct online (DOL), reverse direct online (RDOL), and star-delta.

• Independent protection, even if PLC or DCS connection is interrupted, TeSys Tera system still provides protection for the motor.

• Flexible protection, control, and communication options to suit any low voltage contactor-controlled motor starter application.

• Integrated push button and LED indicators reduce external components and wiring.

• Multiple communication protocols allow affordable integration to larger and complex substation monitoring and control systems.

• Reset push button is available on the controller and the control operator unit thereby reducing the need for one digital input to be configured as reset.

• Optional graphical control operator unit is provided with the controller for display of all metering, protection, and related parameters.

• Conformal coating on the PCB inside the controller resists the corrosive environment, hazardous chemicals, dust, and so on.

Components of TeSys Tera System

The hardware components of the TeSys Tera system are:

• LTMT main unit

• LTMTCT/LTMTCTV sensor module

• LTMT expansion module

• LTMTCUF control operator unit

The microprocessor based LTMT main unit is the central component in the system that manages the control, protection, and monitoring functions of three-phase AC induction motors.

The LTMT main unit is designed to work with the following protocols:

• Modbus RTU

• PROFIBUS DP

• EtherNet/IP

• Modbus TCP/IP

The system can be configured and controlled by using the following interfaces:

• A PC running the TeSys Tera DTM embedded in a FDT container such as SoMove software

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• The LTMTCUF control operator unit

• A PLC or DCS connected to the system through the communication network

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The TeSys Tera DTM Library software V2.0.0 or above to be installed on PC for DTM configuration. For more details on DTM configuration, refer to the TeSys Tera Motor Management System DTM Library Online Help Guide – DOCA0275EN.

Naming Conventions of LTMT Main Unit

The reference number of the LTMT main unit is based on the communication protocol and control voltage of the controller.

The following tables describe the LTMT main unit reference number: LTMTxyy

Naming Conventions of LTMTCT/LTMTCTV Horizontal Sensor Module

The reference number of the LTMTCT/LTMTCTV sensor module is based on the ampere rating and applicable zone of the sensor module.

The following tables describe the LTMTCT/LTMTCTV sensor module reference number: LTMTCTxxyy, LTMTCTxxxyy, LTMTCTVxxyy, or LTMTCTVxxxyy

Naming Conventions of LTMT Expansion Unit

The reference number of the LTMT expansion module is based on digital input and output.

The following tables describe the LTMT expansion module reference number: LTMTxxyyzz

Components such as the control operator unit, load external transformers, ground current sensors, and cables add additional range to the TeSys Tera system.

The TeSys Tera system is configured and controlled by SoMove software, which is a Microsoft Windows^® based application, using the open FDT/DTM technology.

SoMove software contains many DTM libraries. A specific DTM library exists for the TeSys Tera Motor Management System.