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Limit Switches

Precision position sensing switches for industrial automation and machinery control

Industrial Limit Switches

Precision limit switches for position sensing and machine control applications

Plunger Type Limit Switch Roller Type Limit Switch

Industrial Limit Switches

Position Sensing

Mechanical switches activated by physical contact with moving parts, used for position detection, end-of-travel sensing, and safety interlocking in industrial machinery.

Actuation Types Plunger, Roller, Lever, Fork
Contact Configuration SPDT, DPDT, 3PDT
Electrical Rating Up to 600V AC/DC
Protection Rating IP65, IP67, IP69K
Common Actuator Types:
Plunger/Push Rod Roller Lever Fork Lever Wobble Stick Spring Rod Adjustable Lever Cat Whisker Flexible Rod
Contact Arrangements:
SPDT (1NO + 1NC) DPDT (2NO + 2NC) 3PDT (3NO + 3NC) 4PDT (4NO + 4NC) NO Only NC Only Changeover

Actuator Types & Applications

Plunger Type
  • Actuation: Linear push movement
  • Travel: Short stroke (2-10mm)
  • Applications: Position stops, Mechanical stops
  • Benefits: Compact, Direct actuation
Roller Lever Type
  • Actuation: Angular movement
  • Travel: 15-90° rotation
  • Applications: Conveyors, Gates, Doors
  • Benefits: Low friction, Long life
Fork Lever Type
  • Actuation: Object passing through
  • Design: U-shaped fork
  • Applications: Object detection, Counting
  • Benefits: Bidirectional actuation

Electrical Specifications

Parameter Standard Range Heavy Duty Range Miniature Range
Voltage Rating Up to 600V AC Up to 690V AC Up to 250V AC
Current Rating 10A @ 600V AC 20A @ 690V AC 5A @ 250V AC
Switching Capacity 5.5 kW AC 15 kW AC 1.2 kW AC
Mechanical Life 10 million operations 30 million operations 5 million operations
Electrical Life 0.5 million operations 1 million operations 0.2 million operations

Special Limit Switch Types

Hazardous Area Switches
  • Flameproof/Explosion proof
  • ATEX certified
  • Intrinsically safe
  • Oil & gas applications
Heavy Duty Switches
  • Cast iron/aluminum housing
  • IP67/IP69K protection
  • High mechanical strength
  • Mining, steel plants
Precision Switches
  • High repeat accuracy
  • Low operating force
  • CNC machine tools
  • Precision automation

Limit Switch Selection Guide

Application Recommended Actuator Contact Configuration Enclosure Rating Special Features
Conveyor End Stops Roller Lever SPDT IP65 Adjustable lever, High cycles
Machine Guarding Plunger, Cat Whisker DPDT (Safety rated) IP67 Positive opening, Direct action
Object Detection Fork Lever SPDT or DPDT IP65 Bidirectional, Quick response
Harsh Environment Heavy Duty Roller DPDT IP69K Stainless steel, High temp
Precision Positioning Mini Plunger SPDT IP54 Low operating force, High accuracy

Insulating Mats & Safety Flooring

Electrical safety mats for protection against electric shocks in hazardous areas

Electrical Insulating Safety Mats

High-voltage insulating mats for electrical safety in substations and switchgear rooms

Rubber Insulating Mats PVC Insulating Mats

⚡ Electrical Panel Insulating Mat – Detailed Specifications

Safety Critical
🔹 1️⃣ Purpose

Insulating mats are used to protect operators from electric shock while working near:

  • LT / HT electrical panels
  • Switchgear & MCC panels
  • Substations & transformers
  • Generator control panels
  • Power distribution boards

Primary Function: Provide electrical insulation from earth/ground

🔹 4️⃣ Voltage Classification (Most Important)

Class Max Working Voltage Test Voltage Application Area
Class A 3.3 kV 10 kV Low Voltage Panels
Class B 11 kV 20 kV Medium Voltage Switchgear
Class C 33 kV 40 kV High Voltage Substations
🔴 Safety Rule: Always select a mat with voltage class HIGHER than system voltage for maximum safety margin.

🔹 5️⃣ Thickness vs Voltage Rating

Thickness Voltage Rating Weight (kg/m²) Typical Applications
2 mm Up to 3.3 kV 3.2 kg Control Panels, MCC Rooms
3 mm Up to 11 kV 4.8 kg Switchgear, Transformer Areas
4 mm Up to 22 kV 6.4 kg Substations, HT Panels
6 mm Up to 33 kV 9.6 kg EHV Substations, Power Plants
8 mm Up to 36 kV 12.8 kg Heavy Duty Industrial
10-12 mm Above 36 kV 16-19 kg Extra High Voltage Applications
Selection Guide
  • LT Panels: 2-3 mm thickness
  • 11kV Switchgear: 3-4 mm thickness
  • 33kV Substations: 6 mm thickness
  • Outdoor Installations: UV resistant mats
  • Oily Areas: Oil-resistant rubber
Technical Specifications
Dielectric Strength ≥ 20 kV/mm
Volume Resistivity 10¹² - 10¹⁴ Ω-cm
Tensile Strength ≥ 8 MPa
Elongation at Break ≥ 250%
Operating Temperature -40°C to +85°C
Flame Resistance Self-extinguishing
Standards & Compliance
  • IS 15652:2006 - Indian Standard
  • IEC 61111:2009 - International Standard
  • ASTM D178:2015 - American Standard
  • BS 921:1976 - British Standard
  • AS/NZS 2978:1995 - Australian/New Zealand
Testing Frequency: Annual dielectric testing recommended for all insulating mats in service.

🔌 ASCO Copper Thimbles & Lugs – Technical Specifications

Premium Quality
🔹 About ASCO

ASCO (India) is a reputed ISO-certified manufacturer of electrical connectors with over 30 years of experience in:

  • Copper cable lugs (thimbles)
  • Aluminium cable lugs
  • Bi-metallic lugs
  • Pin type ferrules
  • Terminal blocks
  • Cable connectors
  • Compression fittings
  • Industrial terminals

Widely used in: Electrical panels, power distribution systems, industrial wiring, substations, and automation panels.

🔹 Size Specifications

Dimensions Range
Parameter Minimum Maximum
Cable Size 1.5 sq.mm 630 sq.mm
Stud Hole Size M4 (4mm) M20 (20mm)
Barrel Length Short (15mm) Long (45mm)
Wall Thickness 1.0 mm 3.5 mm
Standard Size Chart
1.5 mm² 2.5 mm² 4 mm² 6 mm² 10 mm² 16 mm² 25 mm² 35 mm² 50 mm² 70 mm² 95 mm² 120 mm² 150 mm² 185 mm² 240 mm² 300 mm² 400 mm² 500 mm² 630 mm²

🔹 Types of ASCO Thimbles

Copper Cable Lugs
  • Material: Electrolytic Copper
  • Tin Plated / Bare Copper
  • Standards: IS 1255, IEC 61238
  • Temperature Rating: 120°C
Aluminium Lugs
  • Material: Pure Aluminium
  • Lightweight Construction
  • Cost-effective Solution
  • For Aluminium Cables
Bi-metallic Lugs
  • Copper-Aluminium Joint
  • Prevents Galvanic Corrosion
  • Al to Cu Cable Transition
  • Special Welding Process
Pin Type Ferrules
Applications:
  • Control wiring in panels
  • PLC & DCS terminations
  • Instrumentation cables
  • Multi-core cable termination
Insulation Types:
Nylon (PA66) PVC Heat Shrink Transparent
Colors Available:
Red Blue Green Yellow Black White
Installation Tools
  • Crimping tools (manual/hydraulic)
  • Wire stripping tools
  • Ferrule crimping dies
  • Heat guns for shrink tubes

Technical Specifications

Parameter Copper Lugs Aluminium Lugs Bi-metallic Lugs Pin Ferrules
Material Electrolytic Copper (99.9%) Pure Aluminium Cu-Al Bimetal Copper with Insulation
Conductivity ≥ 98% IACS Copper side: 98% IACS ≥ 98% IACS
Plating Tin, Silver, or Bare Tin Plated Tin Plated Both Sides Tin Plated
Current Rating As per cable size As per cable size As per cable size Up to 30A
Temperature Rating -40°C to +120°C -40°C to +90°C -40°C to +110°C -40°C to +105°C
Standards IS 1255, IEC 61238 IS 1255, IEC 61238 IS 1255, DIN 46235 IEC 60352-2
Certifications ISO 9001:2015 ISO 9001:2015 ISO 9001:2015 ISO 9001:2015, UL
Installation Guidelines
Do's:
  • Use proper crimping tool matching lug size
  • Strip insulation as per barrel length
  • Clean conductor before crimping
  • Apply anti-oxidant compound for Al lugs
  • Use torque wrench for bolt tightening
Don'ts:
  • Don't use undersized crimping tool
  • Avoid loose or over-tight connections
  • Don't mix copper and aluminium directly
  • Avoid sharp bends near termination
  • Never use soldering for power lugs

Technical Support & Contact

Complete Electrical Solutions

We provide comprehensive electrical products and solutions for industrial, commercial, and residential applications. Our technical team can help with product selection, sizing, and installation guidance.

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  • Email: mk3globalsolutionsales@gmail.com
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