Larsen and Toubro Limited

Hyderabad, Telangana

The etaCON series of digital power factor correction controllers automatically corrects the power factor, with the help of contactors for the connection and disconnection of capacitor banks. L&T offers a wide etaCON range: 3, 5, 7, 8 and 12-step versions. etaCON ensures balanced capacitor usage by intelligent adjustment interface based on the number of switching operations and the connection time of each step, thus ensuring long life for switchgear and capacitors.

• Automatic set-up
• Measurement Sensitivity - 2.5%
• Automatic recognition of current flow direction
• Use in co-generation systems - 4 Quadrant operation
• Flashing of Alarm code in case of abnormal conditions
• Online display of PF, Voltage, Current, kVAr, capacitor overload and Panel temperature
• Two programmable contacts to be used as alarm and / or fan control except for etaCON 3
• No-voltage release protection function
• Capacitor over-current and panel over-heating protection
• Average weekly power factor measurement (last 7 days)
• Keypad lock feature

MM30 is a Microprocessor based Comprehensive Motor Protection Relay designed for Medium and Large Motors

• Auto setting of parameters
• Draw out enclosure
• 8 digit alpha numeric display
• Real Time Measurements
• Measurement and display of actual & trip data recordings.
• 8 LEDs for fault indication.
• Control on number of starts of motor
• Starting sequence control.During start-up of the motor, the unit can control an output contact to automatically manage the starting transition.
• RS485 port for communication with Modbus Protocol.

L&T offers you a wide range of Power factor Correction Relays suitable for all standard applications. Their intelligent adjustment interface ensures balanced usage of capacitors based on the number of switching operations and the connection time of each step, thus ensuring long life for switchgear and capacitors.

• etaCON L Series
  Intelligent Power Factor Controller with automatic set-up.
  • Available steps: 3, 5, 7, 8, 12
  • Compact size (96 96 mm) in 3, 5, 7 steps version
  • Automatic recognition of current flow direction
  • Auto / Manual Control
  • Online display of PF, Voltage, Current, kVAr, capacitor overload and Panel temperature
  • Average weekly power factor measurement
  • Capacitor over-current and panel over-heating protection
  • No-voltage release protection function
  • Last two can be programmed for Capacitor switching / Alarm / Fan Control
  • Keypad locking function
• RPM14
  • Available step: 14
  • Online display of PF, current, kVAr.
  • Auto / Manual Control
  • Suitable for non-uniform banks
  • Alarm for abnormal conditions

Salient Features

• Micro-controller based design
• Draw Out type construction
• Inverse & Definite time trip characteristics
• Field selectable input ranges

Thermal overload relays are protection devices required in various motor starter combinations. L&Ts range of contactors complements its range of thermal overload relays. These are available for various DOL/ Star delta combinations. They have a built-in sensitive mechanism which protects the motor from overload and single phasing.

Type RTX & MN-suitable for MNX contactors

• Ratings: RTX Relay 0.23A-41A
• MN Relay 0.2A-570A
• Inbuilt single phasing protection
• Suitable for direct/separate mounting
• Built-in START and OFF / RESET push buttons
• Auto and manual reset modes
• Ambient temperature compensation: -5 C to +55 C
• Electrically separate NO contact
• Conformance to IEC 60947-4-1 and IS/IEC 60947-4-1

Type RTO- suitable for MO contactors

• Ratings: 0.23A - 110A
• Phase failure sensitive
• Visual status indication
• Sealable transparent cover
• Auto/manual reset function
• Ambient temperature compensated
• Conforms to IEC 60947-4-1 & IS/IEC 60947-4-1

Arc flash mishaps are highly probable in electrical switchboards especially since they may be caused by rodents or falling tools. An arc flash causes huge damage to the switchboard as well as injury to the operating personnel in a very short time of about 150 milliseconds. This damage can be minimised if the system is tripped within 100 milliseconds of the occurrence of arc before significant energy is developed. Hence an arc flash protection system is a necessity in every electrical switchboard, to ensure operator safety and to minimise the damages associated with an arc flash event. We, at L&T have always tried to give more protection to customer & their investments. PGR-8800 a new arc flash protection is designed to react in a least possible time to avoid mishaps.