AC Contactor

KRIPAL AC Contactors are engineered for superior performance and longevity:

• High Electrical Durability: Withstands frequent switching operations
• Robust Construction: Ensures reliable performance in demanding environments
• Low Power Consumption: Energy-efficient coil design reduces operating costs
• Compact Size: Saves valuable space in control panels
• Excellent Contact Material: Provides stable conductivity and arc resistance

Selecting the proper contactor involves considering several factors:

• Rated Current: Match to your load's full-load current with an appropriate safety margin
• Coil Voltage: Ensure compatibility with your control circuit voltage
• Number of Poles: Choose 3-pole for three-phase motors, 4-pole for specific applications
• Utilisation Category: Select based on load type (e.g., AC-3 for squirrel cage motors, AC-1 for resistive loads)
• Environmental Conditions: Consider temperature, humidity, and installation location

While both are electromagnetically operated switches, they differ in capacity and application:

• AC Contactors: Designed for higher current loads (typically >15A), featuring arc suppression and robust construction for power circuit control
• Relays: Generally used for lower current control circuits, signal transmission, and auxiliary functions

KRIPAL contactors require minimal maintenance, but we recommend:

• Regular Inspection: Check for contact erosion, mechanical wear, and dust accumulation
• Periodic Testing: Verify proper operation and contact resistance
• Cleaning: Keep the unit free from dust and contaminants
• Coil Check: Ensure coil voltage remains within specified limits

Our contactors include multiple safety enhancements:

• Arc Suppression Chambers: Effectively extinguish electrical arcs
• Insulation Barriers: Prevent accidental contact with live parts
• Mechanical Interlocks: Available for applications requiring safety interlocks
• Overload Compatibility: Designed to work seamlessly with thermal overload relays

Yes, KRIPAL AC Contactors are specifically designed for motor control:

• Motor Starting: Provide reliable main circuit control for three-phase motors
• Frequent Operation: Support high electrical and mechanical durability for regular cycling
• Overload Protection: Compatible with overload relays for complete motor protection
• Reversing Applications: Available in reversing contactor configurations

Common issues and solutions include:

• Contactor Doesn't Engage: Check control voltage, coil continuity, and mechanical obstructions
• Excessive Noise: Verify coil voltage, check for loose parts, and inspect magnetic surfaces
• Overheating: Ensure proper current rating, check connections, and verify ambient temperature
• Contact Welding: Investigate for short circuits, excessive inrush current, or incorrect utilisation category