Larsen and Toubro Limited

Hyderabad, Telangana

An MD controller enables the user to programthe threshold values of maximum demand and initiate actions i.e. alarm or cut off load when maximum demand / forecast demand / present demand crosses the threshold values. This helps the user to ensure that demand doesnt exceed the sanctioned demand and avoid paying huge penalties.

Parameters:V, A, F, kW, KVA, kVAr, kWh, kVAh, kVArh, PF, Runhr, Onhr, Intr, Phase angle, THD, Events, Neutral current, Max Demand (with RTC) with 4 relay outputs.

Salient features

• Accuracy Class 1 as per IEC 62053-21
• True RMS measurement
• Password Protection provision for security
• Phase wise Voltage & Current Wave Forms in LCD meter
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 phase
• Maximum demand measurement with Real time clock
• Time of Day (TOD) provision is available
• 6 Demand and 6 Energy option with MDoccurancecaptured for each TOD
• 4 relay outputs available for proper load control
• Data logging provision is available
• Auto scrolling and freeze mode for constant single page viewing available
• Terminals with sealing provision (optional)
• Direct access key for Basic parameters, Power and Energy parameters

L&Ts wide range of power contactors is available in single pole, two pole, three pole and four pole configurations. These configurations and current rating in each configuration ensures that each customer requirement is satisfied. Solutions are available for every application like motor starter, agriculture pumps, genset applications, street lighting and switching to alternate source of supply, DC application. Our all contactors are as per IS/IEC 60947-4-1.

MO three pole contactors

• Rating: 9A to 110A AC-3 duty
• Compact Dimensions: Space saving
• DIN Rail mounting upto 110A
• Box clamp termination and terminal shrouds for power terminals
• Lug less termination
• Low VA consumption
• RoHS compliant

MNX three pole contactors

• Rating: 9A to 650A AC-3 duty
• Entire range is UL Listed
• Easy inspection and replacement of coils and contacts
• Alpha-numeric terminal markings
• Front ON/OFF indication
• Aesthetic appearance
• CE Marked and CSA approved
• Operating band from 65 % to 120% up to 32 A

ML three pole contactors

• Rating: 25A to 300A AC-3 duty
• Easy inspection and replacement of coils and contacts
• Alpha-numeric terminal markings
• Robust Design suitable for tropical conditions

MX (Mini) Power Contactors

• Rating: 6A to 12A AC-3 duty
• Enclosed construction for compactness and convenience
• AC & DC coil available
• Base as well as DIN rail mounting facility
• Built in surge suppressor for DC coil contactors
• Low VA consumption

MDX DC coil three pole contactors

• Permanent magnet coil technology
• Compact size
• Low VA consumption
• Wide operating band
• Complete range suitable for DIN rail mounting
• IP20 connection security
• Snap On Installation
• Four terminal coil
• Built-in Surge Suppressor for contactors rated from 9A 38A

MCX Four pole contactors

• Ratings: 16 A to 800 A AC-1 duty
• Suitable for supply changeover and genset applications
• Available in five frame sizes and nineteen current ratings
• Alpha-numeric terminal marking
• Wide operating band up to 100 A AC-1

MU-2P Two pole contactors

• True 2 Pole contactor with Neutral Isolation
• Suitable for single phase pump and motor applications
• Suitable for low voltage condition
• High temperature withstand capability
• Protection of coil from humid environment
• Available with wide band coil

Remote control units play a crucial role on factory shop floor for operational safety and reliability. Reliable push buttons and indicators from our partners ESBEE, have been trusted by users across industries over the past four decades.

The new range of Gen Next series products are compact in size and aesthetically appealing.16 mm Gen Next LED Indicators have sleek and integral design with special fire retardant plastic. They provide uniform and bright illumination with operating life of more than 0.1 million burning hours.

Patented actuator is a ready to use solution for OEM and Panel builders that provides IP67 protectionwith shroud. It has isolated terminals for NO+NC applications.

Illuminated actuators with LED have snap fit for ease in assembly with low power consumption of 0.6 W max. Push button stations provide round ergonomic enclosure with good aesthetics that occupies less space. They are robust, easy to grip, assemble and operate. It is available in standard configuration of actuators and LED indicators.

The product range includes:
New Gen Next Range of Products

• 16 mm & 22.5 mm Gen Next LED Indicators
• Gen Next Actuators & Contact Blocks
• Gen Next Push Button Station
• Gen Next entegral ctuators
• Panel mounted buzzer

Standard Range of Products

• Standard Actuators & Contact Blocks
• Standard Push Button Stations
• Accessories

CAM Operated Rotary Switchesare used to perform make and break operation in a sequential way by rotating the switch to different positions.
The CAM, which closes and opens the contacts, has rotary movement in multiple positions, thereby controlling multiple circuit functions.

Further the flexibility in the switch type selection covering various current / voltage ratings and options to select the number of contacts, is an added advantage. This ensures that a right switch is chosen for the desired application. CAM Switches thus offer complete design flexibility to assemble complex switching programs, contact ratings and customize all switching applications. Cam Switches are suitable for AC as well as DC switching applications.

The basic operating mechanism of cam switch is intended to suit application coupled with Quick-Make, Quick-Make-Quick-Break and Spring Return operating mechanisms.

The CAM switches offers versatile mounting options in addition to standard panel / flush mounting and other special features like single hole, door interlocking, padlock, lock and key for various needs. The wide option such as type of knob, front plate colour and customized marking on the marking plate eliminates the need of separate label on the panel.

Superior quality of engineering material and double butt contacts with silver bimetal on copper / brass provide stable electrical performance. The high-grade engineering plastics with high tracking index like nylon, silicon and glass filled polyamide for the components ensures greater mechanical strength.

Advanced manufacturing processes for CAM switch components under stringent quality conditions ensure durability, reliability and enhanced life.

Load Break Switchescomply with the latest specifications for modern low voltage devices.

Outstanding electrical characteristics of LB Switches with compact design, contribute to space saving and operational convenience.

The construction and design of the switch make it compact, safe and highly reliable. The switch uses polyamide glass filled material, having excellent track resistance (CTI) for insulation to prevent flashover between phases in the most severe conditions.

The special contact design and configuration makes the switch highly reliable to withstand high short circuit currents.

• Double break contracts
• Polycarbonate shroud for wired terminal protection is included
• Excellent switching and high short circuit capacity
• Compact and reliable
• Versatile mounting options, i.e. front mounting, rear mounting DIN 35 and enclosure mounting
• Quick, simple and convenient, dia. 22.5 mm single hole mounting is offered for 16A/20A switches with padlocking option
• Finger protection - IP 20
• Terminal screws with fixed clamp for easy wiring
• Add-on main/neutral/auxiliary contacts can be mounted on both sides of the switch at site
• 4th Pole addition is possible at site

Isolator, Motor Start and Stop, Manual Motor controller as Motor Disconnect, Main Switch, Emergency ON-OFF. Control Switch, Changeover Switch

• Conforms to IS 8623-1 & 3 , IEC 61439-1 & 3
• Third party certification for Ingress protection (IP) and Mechanical impact (IK)
• Perfect Blend of superior aesthetics , contemporary feel and subtle presence that gels harmoniously with your dcor
• Wide and comprehensive range of distribution boards to take care of each and every customer requirements
• Complete range of Distribution Boards is RoHS compliant

• SPN DB
• TPN DB
• PPI DB
• VTPN DB
• Phase Segregated DB
• Phase Selector DB
• Flexi DB
• Customized DB
• Cable End Box
• Accessories

Our range covers Timers, Time Switches, Supply Monitors and Hour Meters & Counters.

Timers and supply monitoring devices find their use in a wide variety of applications in the industry. L&T's reliable Timing devices and Supply monitors from GIC over the past four decades have provided the best solutions to its customers

Time Switches are used for fixed time based daily / weekly applications. They are ideal for lighting applications and are also used to control air-conditioners / coolers, geysers, conveyers, pumps & exhaust fans etc.

Timers are used to control processing times in a wide range of applications which includes star to delta changeover operations in Motor control / Starter panels, elevators, conveyor belt sequences, air conditioning systems, warning light systems etc.

The supply monitors ensure reliable detection of phase parameters such as phase loss, phase sequence and phase unbalance in all three-phase networks. They find application in HVAC, welding machines, elevators and cranes, etc.

The Current Monitoring Relay provides monitoring and protection of loads against overload, under load, phase loss, phase asymmetry and phase sequence faults. Their applications include all motor and pump protection panels with single phase and three phase supply.

The Earth Leakage Relay monitors, detects and protects power systems from earth leakage faults with wide selectable range of 30 mA to 30 A. They are widely used in mines and in Gen sets.

L&T offers a range of Agricultural Electrical Products, as LTLK - the brand that has served farmers for over 60 years. Agricultural Electrical Products include electrical starting solutions, submersible pumps, monoblock pumps and domestic pumps.

L&Ts range of electrical wiring accessories comprising switches, sockets and other accessories, has been crafted to fulfil the aspirations of consumers in independent homes, residential and commercial buildings. With their appealing design and technology edge, the range offers an unmatched blend of functionality, reliability and aesthetics. The wiring accessories, retail under the brand names - Englaze, Entice and Oris - and come with a 12-year warranty.

Automatic Power Factor Correction (APFC) panels ensure consistently high power factor under fluctuating load conditions without any manual intervention. In addition, the occurrence of leading power factor is prevented. They continuously sense and monitor the load condition, automatically switch ON and OFF relevant capacitor and protect against any electrical faults in a manner that will ensure safe isolation of the power factor correction equipment.

• Pre-selected optimal number of steps and step sizes, for better step resolution and hunt free capacitor switching
• Ideal switchgear selection for reliable short circuit protection, without nuisance tripping
• Right capacitor-reactor combination selection to prevent harmonic amplification and resonance
• Option of capacitor duty contactor or thyristor switch for transient free switching
• Panels with better electrical, mechanical and thermal design for longer life of capacitors and other components.
• Panels are with advanced microcontroller based APFC relay that offers reliable switching operation

Manual operation of motorised changeover switch is also feasible through the manual override feature. The Control supply of motorised changeover will automatically cut off during insertion of manual handle.

Motorised Changeover comes with a Auto/Manual selector switch. It enables the control supply to motorised changeover switch.

Provision for padlocking in OFF position up to three padlocks is available. Padlocking is possible in both auto and manual mode.

Overall dimensions of motorised and manual changeover switches remain the same, which makes upgradation easy.

Complete touch proof design, with help of terminal shroud, source separator & inter-phase barriers.

Staggered terminals provide clear access to all terminals from the front, ensuring ease of termination.

HRC Fuse Link range covers ratings from 2A to 800A. HRC Fuse-link range is available in 14x51 Cylindrical, DIN and BS type

High breaking capacity: 80kA for Cylindrical & BS Type & 100kA for DIN Type

The complete range conforms to IS 13703 (Part 2) / IEC 60269-2 standards

Let-through energy value of L&Ts fuse is extremely low; it leads to optimal selectivity for the cable size & downstream protection devices. Low power loss also leaded to low running cost & minimum heating.

Fuse blown indication is available through a red pop-up indicator

Suitable fuse base & fuse pulling handle are also available

Cable ducts are manufactured from specially compounded high impact rigid polyvinyl chloride. These will not peel, chip or crack. It resists oil, salt solution and fungus.

It is non-flammable confirming to UL 94 V0 standards, warp-proof and non-brittle. It has high dielectric strength and withstands temperature up to 60C.

Its unique cover locking design prevents popping up of wires while removing cover. It enhances aesthetics and clarity, permits faster connections, addition and fault tracing of wires. It provides complete electrical insulation.

Standard colour of greenish grey for B type and light grey for A type are generally available. Other colours like black, white and blue are also available.

L&Ts MO0, MN0 and MX0 range control contactors have proven track record of successful and reliable implementation of complex control logics. Our control contactors come with high flexibility of number and combination of auxiliary contacts. These aesthetically suit the panels visuals. They are suitable for industrial as well as commercial installations where complex control is required.

MO0

• In-built 5 auxiliary contacts
• Max. 9 NO/NC combination with maximum 6 NC contacts
• Flexibility in selection of NO/NC combination
• MO0 range shares same accessories as MO power contactors
• These contactors have terminal shroud for safety
• The coil VA is less which reduces the burden on control transformer
• Four terminal Coil
• The entire range is RoHS compliant.

MN0 & MX0 control contactor

• Conforms to IS/IEC 60947-4-1, IEC 60947-4-1
• MN0 Available with DC control
• MX0 Available with AC/DC control
• Positive ON / OFF indication from the front
• Available in all NO/NC combinations (4 Pole)
• Maximum of 8NO to 8NC contact combinations with add-on aux contact blocks
• All accessories are top mounting

Accessories

• Add-on auxiliary contact block
• Surge Suppressor
• Mechanical Interlock Kit (for MX0)

S-D-F range covers ratings from 32A to 2000A. S-D range is available in both open execution & Sheet steel enclosure versions.

S-D-F range provides users with a high level of safety & convenience. The complete range conforms to IS/ IEC60947-3 standards.

It also carries the CE marking signifying compliance to stringent European safety norms.

S-D superior features translate into better safety & convenience for the users.

Terminal shrouds provide protection against accidental direct contact. Terminal shrouds also protect against phase to phase short circuit through an external conducting path.

Positive ON / OFF indication ensures that the handle indicates OFF position only when main contacts are actually open.

Large ground clearance eliminates possibility of phase to ground flashover.

Built-in padlocking arrangement provided to lock the unit in OFF position prevents inadvertent operation of the unit.

Versatile handleThe handle coupling has the following user-friendly features:- Door interlock (defeatable)- Padlock up to 3 locks- Choice of operating quadrant- Flexibility ( 3mm mismatch operational quadrant)

The Switch-Disconnector provides complete Flexibility in mounting; Unit can be mounted at any angle in a vertical plane.

Handle depth can be varied and fixed as per requirement during installation. This is possible because the telescopic shaft can be adjusted for stepless variable depth.

Complete touch proof design, with help of terminal shroud, source separator and inter-phase barriers

Staggered terminals provide clear access to all terminals from the front, ensuring ease of termination

Patented dual dead center mechanism enables the user to toggle between central or side positions for operating handle. This can be easily converted on site as required

Multi featured operating handle:

• Unique flip-able handle for rating 400 A and above which enables the user to operate the switch with two hands
• Provision for padlocking in OFF position with three padlocks
• Defeat feature in both ON states and auto restoration of panel door
• IP54 with extended type operating handle

L&Ts range of capacitor duty Contactors is specially designed for capacitor switching applications. As capacitor switching is associated with high inrush current, the contactors are provided with damping resistors which limit the value of inrush current to a safe value. The contactors are used in APFC panels for switching power capacitors. Selection of these capacitors depends on the amount of reactive power compensation required.

• Separately terminated de-latching contacts for enhanced operational reliability
• Improved switching performance
• Dual contact gap for auxiliary contacts
• Separate termination of damping resistors
• Encapsulated resistor assembly
• Wide and chatter-free operating band
• Higher electrical life
• Enhanced product safety

Single pole contactors

MR range of single pole contactor caters to single phase applications. The contactors are rugged and have a wide operating band. Typical applications include Compressors in air-conditioning equipment, Single Phase Pumps, Single Phase Power Supply, Single Phase Heater etc. Their high AC-1 rating ensures better overload capacity.

• Range 16A-40A AC-3
• Conforms to Conforms to IEC 60947-4-1, IS /IEC 60947-4-1 standards
• Available with screw and fast on type terminations (Optional)

MM10 Relay is a microprocessor based Motor Protection Relay with 4 digits LED Display

• Thermal Overload with Warning
• Short Circuit
• Under Current
• Unbalance
• Phase Loss
• Phase Sequence Reversal
• Earth Fault
• Prolong Starting, Locked Rotor
  

• 4 Digit LED display
• Measurement of RYB, Zero Sequence current and Thermal capacity.
• Separate LEDs for indication of Motor operational, Trip & Thermal OL/ pre-alarm status.
• Programmable thermal OL time constant right from 1 sec to 40 sec.
• 2 nos. of C/O output contacts.
• 1 no. Programmable Binary input for remote operation.It can be configured for either of these operations:
  • Inhibit Motor Start
  • Trip Reset
  • Instant Tripping
• Relay testing facility
• Trip data recordingFault current or cause of last tripis displayed.

MPR300 is a Microprocessor based LT Motor protection relay. The relay has got inbuilt CTs for motor sizes up to 50KW (i.e 88 A current)

• Thermal Overload
• Earth Fault
• Single Phasing
• Locked Rotor
• Under Current

• LEDs for trip indication.
• Inbuilt CTs available
• 4 selectable trip time curves for thermal overload
• Test facility through front push button.
• Manual reset facility through front push button.
• With / Without fail safe mode

• MPR 300 offers you greater security, operator safety through proper co-ordination in case of earth fault on motor feeder.

• MPR300 is used for protection of motors widely used in fans, pumps, crushers, mills, compressors, belt conveyors, centrifuges, mixers, ventilators, escalators, motorized valves etc.

L&Ts range of capacitor duty Contactors is specially designed for capacitor switching applications. As capacitor switching is associated with high inrush current, the contactors are provided with damping resistors which limit the value of inrush current to a safe value. The contactors are used in APFC panels for switching power capacitors. Selection of these capacitors depends on the amount of reactive power compensation required.

• Separately terminated de-latching contacts for enhanced operational reliability
• Improved switching performance
• Dual contact gap for auxiliary contacts
• Separate termination of damping resistors
• Encapsulated resistor assembly
• Wide and chatter-free operating band
• Higher electrical life
• Enhanced product safety

Vacuum Contactor Units from L&T are three-pole contactors with electromagnetic operating mechanism for medium voltage switching applications. Applications such as neutral grounding of Generators, operations of soft starters, Reactor Capacitor switching, motor switching duties need numerous switching operations. Effective & efficient switching in such areas with high operating voltage is achieved with Vacuum Contactor Units.
Our VCUs are suitable for system voltage up to 12kV and short circuit capacity up to 50kA, with HRC fuse. L&T VCUs come with latched & non-latched configurations. Design, manufacturing & testing processes of VCUs meet international demands through a compliance of IEC 62271-106.

• Fused Short circuit protection up to 50kA
• Available in latched & non latched configurations
• Encapsulated current carrying parts for higher safety
• Truck mounted design similar to VCBs
• Suitable for motor starters with numerous switching operations
• VCU panels can be coupled with VCB panels owing to similar dimensions

With L&Ts active harmonic filters, reduce your THD levels to within IEEE/CEA limits. These filters are IGBT-based power converters. This filter injects negative of the harmonic current resulting in practically no harmonic distortion. Phase balancing and power factor correction is also achieved.

Features:

• 30-600 A Active filter in 3 phase 3 wire/4wire
• Stand-alone & modular units
• Response time less than 1 ms
• Easy diagnosis of fault conditions with alarms
• Easy configuration & parameter monitoring with LCD touch screen HMI

L&T Agriculture Submersible Flat Cables are made of bright, plain multi-strand annealed copper conductor, as per class 5 of IS:8130:1984. These cables are used for Agricultural submersible pump set applications and are available in 3 core - 500 meter & 1000 meter drums.

Voltage Grade 1.1 kV (1100 V) conforming to IS:694:1990.

L&T XLPE Agricultural Flat Cables - These wires are made of cross-linked polyethylene material with high continuous conductor temperature - 90 C and high intermittent overloading - 130 C. Since it has better corrosion resistance, it is suitable for alkaline hard water areas.

L&T Heavy Duty Capacitors are metallized polypropylene (MPP) capacitors. The capacitors come with stacked windings. The box capacitors are impregnated with a non-PCB biodegradable resin The cylindrical Capacitors are subjected to an extended period of drying after which the casing is filled with an inert gas to prevent corrosion of the winding elements and inner electrical contacts. Compact design ensures space saving. Heavy Duty capacitors have a long life of 150000 hours.

• Range available: 3-30 kVAr (Cyl) & 5-50 kVAr (Box)
• Box (Resin-filled) & Cylindrical (Gas-filled) type construction
• MPP technology with Self-Healing & Over-pressure Disconnector
• Over current withstand capability - 1.8 In
• Inrush current withstand capability - 300 In
• Number of switching operations per year - 8000
• Low operating loss (0.45 W/kVAr)L&T Heavy Duty Capacitors are metallized polypropylene (MPP) capacitors. The capacitors come with stacked windings. The box capacitors are impregnated with a non-PCB biodegradable resin The cylindrical Capacitors are subjected to an extended period of drying after which the casing is filled with an inert gas to prevent corrosion of the winding elements and inner electrical contacts. Compact design ensures space saving. Heavy Duty capacitors have a long life of 150000 hours.Features:
  • Range available: 3-30 kVAr (Cyl) & 5-50 kVAr (Box)
  • Box (Resin-filled) & Cylindrical (Gas-filled) type construction
  • MPP technology with Self-Healing & Over-pressure Disconnector
  • Over current withstand capability - 1.8 In
  • Inrush current withstand capability - 300 In
  • Number of switching operations per year - 8000
  • Low operating loss (0.45 W/kVAr)
  • Application in commercial buildings with CFLs & SMPS, garment industries etc.
• Application in commercial buildings with CFLs & SMPS, garment industries etc.

• MRP11
  Single Phase Reverse Power Relay

• SC14S
  1 phase High Impedance Earth Fault RelayApplication: Differential protection, REF protection

• MG30 / MG30-I
  Generator Protection & Management RelayMG30: For Impedance Grounded (NGR / NGT) GeneratorsMG30-I: For Solidly Grounded Generators

• MD32-G
  Generator Differential Relay

• SC14S
  1 phase High Impedance Earth Fault RelayApplication: Differential protection, REF protection

• MD32-TM
  Percentage Biased Transformer Differential Relay

• TCOMP
  Comprehensive Transformer Control Metering Protection for Transform feeder

• MC12A
  1 phase, non-directional, Over Current or Earth Fault Relay

• nX Series
  MC31AnX 3 Phase Time delayed Over Current and Earth faultMC61AnX 3 Phase Time delayed Over Current and Earth fault + InstantaneousOver Current and Earth Fault

• FCOMP
  A comprehensive feeder control metering protection relay for complete protection of air, vacuum or gas-insulated circuit breaker operated feeders in Medium and Low voltage switchgear assemblies.