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L&T (Larsen & Toubro) Exora 4P 100A

The L&T Exora 4P 100A is a heavy-duty Switch Disconnector engineered for reliable 4-pole isolation in high-demand industrial and commercial electrical networks. Designed under the premium Exora series, this 100A model facilitates safe load-break operations for 3-phase and neutral circuits. Its AC-23A utilization category makes it exceptionally suited for switching highly inductive motor loads, providing a robust master control point for distribution boards where mechanical durability and thermal stability are non-negotiable.

Quick Answer

The L&T Exora 4P 100A is best used as a master isolator in 3-phase distribution boards for industrial machinery, commercial HVAC systems, and large-scale power panels requiring manual disconnection of up to 100A current.

✓100A High-Capacity Current Rating: Optimized for heavy industrial machinery and commercial mains.
✓AC-23A Utilization Category: Specifically engineered for switching motors and highly inductive loads.
✓True 4-Pole Isolation: Simultaneous disconnection of 3 phases and the neutral for maximum maintenance safety.
✓IP40 Protection: Enclosed in high-grade thermoplastic housing for dust resistance and finger-safety.
✓DIN Rail Mounting: Seamlessly integrates into standard modular distribution boards alongside MCBs and RCCBs.

Choose the L&T Exora 4P 100A if you require a high-reliability, brand-backed isolator for a 3-phase panel that handles up to 100A. It is the gold standard for maintenance-heavy environments where safety and durability are prioritized over automated tripping functions.

✓ Who Should Buy

  • •Panel Builders looking for a compact, DIN-rail mounted 100A master switch.
  • •Industrial Maintenance Engineers managing 3-phase motor control centers.
  • •Commercial Facility Managers upgrading main distribution boards for HVAC or lifts.

✕ Who Should Avoid

  • •Users requiring automatic short-circuit or overload protection (Use an MCB/MCCB instead).
  • •Residential users with simple single-phase loads under 63A.
Product Overview
The L&T Exora 4P 100A stands as a benchmark in the Switch Disconnector segment, bridging the gap between residential modular switches and heavy industrial gear. Manufactured in India since 2015, the Exora series emphasizes a compact footprint without compromising on electrical endurance. The rotary operation mechanism provides a positive tactile feedback, ensuring the operator is certain of the 'ON' or 'OFF' status, which is critical during emergency isolations. Technically, the unit is built to withstand 415V AC environments with a 10kA breaking capacity rating. While it does not provide internal overload or short-circuit protection, its primary function is to act as a 'Visible Break' isolation point. The screw terminal design is optimized for high-gauge wiring, ensuring low contact resistance and preventing heat buildup even under continuous 100A load cycles.

BrandL&T (Larsen & Toubro)
Model NameExora 4P 100A
TypeMain Switch Disconnector
SeriesExora Series
Housing MaterialThermoplastic
Country Of OriginIndia
Release Year2015

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Engineering Analysis
From a technical standpoint, the Exora 4P 100A utilizes a double-break contact system which reduces the arc energy per gap, significantly increasing the reliability of the isolation function. The 4-pole configuration is essential for TN-S and TT earthing systems where the neutral must be isolated to prevent circulating currents during maintenance. The lack of a trip mechanism is an intentional design choice to prevent 'nuisance tripping,' allowing the device to remain closed during transient surges while letting upstream protection devices (like MCCBs) handle faults.

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