AU Solutions

A comprehensive range for real world applications
L&T’S AU Solutions for final distribution offer a unique blend of safety, convenience and performance. Each product in the AU Solutions range is designed to provide lasting benefits.


Protection Devices

Protection devices in the AU Solutions range protect lives and installations from overload, short-circuit, earth leakage, lightning and switching surges.


  • 0.5A – 125A
  • B, C, D Curves
  • SP, DP, TP, FP, SPN, TPN


  • 16A – 100A
  • 10mA – 500mA
  • DP, FP
  • Type AC, Adi


  • 6A – 63A
  • 10mA – 300mA
  • DP, FP
  • Type AC, Adi


  • Type 1+2, Type 2
  • 1P+N, 3P+N

Monitoring Devices 

The AU Solutions range of protection devices are complemented by a host of monitoring devices.


  • Auxiliary Contact (AUX)
  • AUX/TAC (Trip Alarm Contact)
  • Undervoltage Release (UV)
  • Overvoltage Release (OV)
  • Shunt Release (SR)
  • Padlocks

Energy Meters

  • Single-phase
  • Three-phase

Indicating Lights

  • For single-phase and three-phase supply

Control Devices 

The AU Solutions range includes a host of Control Devices.


  • 25A to 125A
  • DP, TP & FP

Modular Contactors

  • 25A to 63A
  • SP, DP, TP & FP

Changeover Switches

  • 25A to 63A
  • DP & FP

Time Switches

  • Digital
  • Analog
  • Astronomical

Communication Solution

AU-COM addresses the remote monitoring and controlling requirement of the building and industrial segments. The communication solution consists of AU-COM & AU-CON (an optional Convertor Module).


    • In absence of control circuits, one can connect a maximum of 4 Auxiliary Contacts (AU-AUX) and 4 Trip Alarm Contacts (AU-TAC) with AU-COM
    • With 2 control circuits in place, a maximum of 2 Auxiliary Contacts and 2 Trip Alarm Contacts can be deployed for status monitoring
    • In all, 15 AU-COM modules can be connected in the system
    • For remote monitoring and metering of energy, single-phase and three-phase energy meters with:

– RS 485 Module
– Wi-Fi modules