Lauritz Knudsen Capacitor Duty Contactors, MO C, 20kVAr, 110V AC | 3 Pole | 1 Built-in Auxiliary Contacts | AC-6b| Heavy‑Duty Contacts for Long‑Term Durability
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Lauritz Knudsen Capacitor Duty Contactors, MO C, 20kVAr, 110V AC | 3 Pole | 1 Built-in Auxiliary Contacts | AC-6b| Heavy‑Duty Contacts for Long‑Term Durability
- Description
- Specifications
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- Warranty
- Reviews
Description
About the Product
The Lauritz Knudsen MO C Capacitor Duty Contactor 20kVAR 3P 440V AC (AC 6b) with In-Built 1NO Auxiliary Contact & 110V AC Coil (50–60 Hz) is a specialized industrial switching device engineered for reliable operation of capacitor banks in power factor correction (PFC) systems. With a 20kVAR rating & a 3 pole configuration, it is ideally suited for medium-capacity capacitor switching in industrial & commercial installations.
Designed for AC 6b duty applications, this contactor is specifically built to handle capacitive loads, including high inrush currents during capacitor energization. It incorporates advanced pre-charge contact technology with damping resistors, which effectively limit surge currents, protect capacitor banks, & extend the overall lifespan of the electrical system.
The integrated 1 normally open (1NO) auxiliary contact enhances functionality for automation, signaling, & control circuits, while the 110V AC coil (50–60 Hz) ensures compatibility with standard industrial control systems. Built using high-quality materials & precision engineering, this contactor provides safe switching, durable performance, & dependable operation in demanding environments.
Purpose & Function
This capacitor duty contactor is designed for efficient power factor correction:
• Switches capacitor banks to improve power factor
• Handles high inrush current during capacitor energization
• Reduces switching transients & electrical stress
• Supports automation in PFC panels
• Enhances energy efficiency & overall system performance
Electrical Configuration
• Product type: Capacitor Duty Contactor
• Model: MO C
• Rated capacity: 20kVAR
• Number of poles: 3P
• Voltage rating: 440V AC
• Utilization category: AC 6b (capacitor duty)
• Auxiliary contacts: In-built 1NO
• Coil voltage: 110V AC
• Frequency: 50–60 Hz
• Function: Capacitor bank switching & power factor correction
Construction & Design
Engineered for capacitor switching applications:
• Special contact design optimized for capacitive loads
• Built-in pre-charge resistors for inrush current control
• Integrated auxiliary contact for control functionality
• Compact & durable construction for industrial use
• High mechanical & electrical endurance
Safety & Protection
• Minimizes inrush current during capacitor energization
• Protects capacitor banks & connected equipment
• Reduces voltage spikes & electrical disturbances
• Enhances lifespan of system components
• Ensures safe & reliable switching operations
Mounting & Installation
• Suitable for panel mounting in PFC systems
• Compact design for efficient space utilization
• Easy & secure installation process
• Simplified wiring with built-in auxiliary contact
• Designed for seamless integration in capacitor panels
Application Domains
• Power factor correction (PFC) panels
• Capacitor bank switching systems
• Industrial power distribution networks
• Electrical control panels
• Manufacturing & process industries
• Commercial electrical installations
Key Features
• 20kVAR capacitor duty contactor
• 3-pole configuration for three-phase systems
• AC 6b duty for capacitive loads
• In-built 1NO auxiliary contact
• 110V AC coil (50–60 Hz)
• Advanced inrush current limiting design
Applications
• Capacitor bank switching
• Power factor correction systems
• Industrial automation panels
• Energy efficiency improvement systems
• Electrical distribution applications
FAQs
1. What is an AC 6b contactor?
Ans: An AC 6b contactor is designed specifically for switching capacitor banks & handling high inrush currents safely.
2. Why use a capacitor duty contactor?
Ans: It protects capacitor banks & ensures safe switching under high surge conditions.
3. What is the purpose of pre-charge resistors?
Ans: They reduce the initial inrush current during capacitor energization.
4. What is the function of a 1NO auxiliary contact?
Ans: It provides additional signaling & control capabilities in automation systems.
5. Where is this contactor used?
Ans: It is used in PFC panels, industrial systems, & capacitor bank installations.
6. What is the advantage of a 110V coil?
Ans: It ensures compatibility with common control voltages & reliable system operation.
7. Is this suitable for motor control?
Ans: No, it is specifically designed for capacitor switching applications.
Overview
| Ambient temperature | -5 to 55 degree C |
|---|---|
| Mechanical Life (No. of operating cycles) | 240 Operations/Hr |
| Rated impulse withstand voltage (Uimp) | 8kV |
| Rated Insulation Voltage Ui (V) | 1000V |
| Conformance to Standards | IS/IEC 6094741, IEC 6094741, EN 6094741 |
| Coil Voltage | 110 V AC |
| Rated operational current at 415V | 26.2A |
| Discount Percentage | Between 0-10 % |
| No. of Poles | 3P |
| Height(mm) | 87 |
| Width(mm) | 45 |
| Depth(mm) | 133.5 |
| Rated kW | 20kVAr |
| Coil Operating band %Uc (Pick up) | 65 - 110 % |
| Mechanical Life | 10 million |
| Coil Operating band %Uc (Drop off) | 35 - 65 % |
| Pick up VA consumption | 77VA |
| Hold on VA consumption | 9VA |
Warranty
- All products listed in the price list are covered by a warranty against manufacturing defects for a period of 18* months from the date of purchase.
- For Lauritz Knudsen MCBs & Isolators mounted inside Lauritz Knudsen Distribution Boards, an extended warranty of 5 years is provided.
- In the event of a defect due to faulty workmanship or other associated reasons, the manufacturer will, at its discretion, remedy the defect or replace the faulty parts or the entire product as soon as possible, free of cost.
- This warranty is subject to proper usage and efficient maintenance and does not cover defects arising from fire, accidents, inefficient maintenance, faulty operation, or deliberate or accidental damage.
- The warranty does not cover damage to power electronic components such as thyristors & IGBTs, which primarily fail due to over-temperature or over-voltage. Users must take adequate precautions to eliminate such conditions.
- The manufacturer shall not be responsible or liable for any special, incidental, social, or consequential losses (including loss of profits), punitive damages, injury, or damages of any kind solely attributable to defect or failure of its products.
- The manufacturer shall not be liable in any manner for issues related to or failure in the performance of any other equipment to which the product is connected.
Reviews
Description
About the Product
The Lauritz Knudsen MO C Capacitor Duty Contactor 20kVAR 3P 440V AC (AC 6b) with In-Built 1NO Auxiliary Contact & 110V AC Coil (50–60 Hz) is a specialized industrial switching device engineered for reliable operation of capacitor banks in power factor correction (PFC) systems. With a 20kVAR rating & a 3 pole configuration, it is ideally suited for medium-capacity capacitor switching in industrial & commercial installations.
Designed for AC 6b duty applications, this contactor is specifically built to handle capacitive loads, including high inrush currents during capacitor energization. It incorporates advanced pre-charge contact technology with damping resistors, which effectively limit surge currents, protect capacitor banks, & extend the overall lifespan of the electrical system.
The integrated 1 normally open (1NO) auxiliary contact enhances functionality for automation, signaling, & control circuits, while the 110V AC coil (50–60 Hz) ensures compatibility with standard industrial control systems. Built using high-quality materials & precision engineering, this contactor provides safe switching, durable performance, & dependable operation in demanding environments.
Purpose & Function
This capacitor duty contactor is designed for efficient power factor correction:
• Switches capacitor banks to improve power factor
• Handles high inrush current during capacitor energization
• Reduces switching transients & electrical stress
• Supports automation in PFC panels
• Enhances energy efficiency & overall system performance
Electrical Configuration
• Product type: Capacitor Duty Contactor
• Model: MO C
• Rated capacity: 20kVAR
• Number of poles: 3P
• Voltage rating: 440V AC
• Utilization category: AC 6b (capacitor duty)
• Auxiliary contacts: In-built 1NO
• Coil voltage: 110V AC
• Frequency: 50–60 Hz
• Function: Capacitor bank switching & power factor correction
Construction & Design
Engineered for capacitor switching applications:
• Special contact design optimized for capacitive loads
• Built-in pre-charge resistors for inrush current control
• Integrated auxiliary contact for control functionality
• Compact & durable construction for industrial use
• High mechanical & electrical endurance
Safety & Protection
• Minimizes inrush current during capacitor energization
• Protects capacitor banks & connected equipment
• Reduces voltage spikes & electrical disturbances
• Enhances lifespan of system components
• Ensures safe & reliable switching operations
Mounting & Installation
• Suitable for panel mounting in PFC systems
• Compact design for efficient space utilization
• Easy & secure installation process
• Simplified wiring with built-in auxiliary contact
• Designed for seamless integration in capacitor panels
Application Domains
• Power factor correction (PFC) panels
• Capacitor bank switching systems
• Industrial power distribution networks
• Electrical control panels
• Manufacturing & process industries
• Commercial electrical installations
Key Features
• 20kVAR capacitor duty contactor
• 3-pole configuration for three-phase systems
• AC 6b duty for capacitive loads
• In-built 1NO auxiliary contact
• 110V AC coil (50–60 Hz)
• Advanced inrush current limiting design
Applications
• Capacitor bank switching
• Power factor correction systems
• Industrial automation panels
• Energy efficiency improvement systems
• Electrical distribution applications
FAQs
1. What is an AC 6b contactor?
Ans: An AC 6b contactor is designed specifically for switching capacitor banks & handling high inrush currents safely.
2. Why use a capacitor duty contactor?
Ans: It protects capacitor banks & ensures safe switching under high surge conditions.
3. What is the purpose of pre-charge resistors?
Ans: They reduce the initial inrush current during capacitor energization.
4. What is the function of a 1NO auxiliary contact?
Ans: It provides additional signaling & control capabilities in automation systems.
5. Where is this contactor used?
Ans: It is used in PFC panels, industrial systems, & capacitor bank installations.
6. What is the advantage of a 110V coil?
Ans: It ensures compatibility with common control voltages & reliable system operation.
7. Is this suitable for motor control?
Ans: No, it is specifically designed for capacitor switching applications.
Overview
| Ambient temperature | -5 to 55 degree C |
|---|---|
| Mechanical Life (No. of operating cycles) | 240 Operations/Hr |
| Rated impulse withstand voltage (Uimp) | 8kV |
| Rated Insulation Voltage Ui (V) | 1000V |
| Conformance to Standards | IS/IEC 6094741, IEC 6094741, EN 6094741 |
| Coil Voltage | 110 V AC |
| Rated operational current at 415V | 26.2A |
| Discount Percentage | Between 0-10 % |
| No. of Poles | 3P |
| Height(mm) | 87 |
| Width(mm) | 45 |
| Depth(mm) | 133.5 |
| Rated kW | 20kVAr |
| Coil Operating band %Uc (Pick up) | 65 - 110 % |
| Mechanical Life | 10 million |
| Coil Operating band %Uc (Drop off) | 35 - 65 % |
| Pick up VA consumption | 77VA |
| Hold on VA consumption | 9VA |
Warranty
- All products listed in the price list are covered by a warranty against manufacturing defects for a period of 18* months from the date of purchase.
- For Lauritz Knudsen MCBs & Isolators mounted inside Lauritz Knudsen Distribution Boards, an extended warranty of 5 years is provided.
- In the event of a defect due to faulty workmanship or other associated reasons, the manufacturer will, at its discretion, remedy the defect or replace the faulty parts or the entire product as soon as possible, free of cost.
- This warranty is subject to proper usage and efficient maintenance and does not cover defects arising from fire, accidents, inefficient maintenance, faulty operation, or deliberate or accidental damage.
- The warranty does not cover damage to power electronic components such as thyristors & IGBTs, which primarily fail due to over-temperature or over-voltage. Users must take adequate precautions to eliminate such conditions.
- The manufacturer shall not be responsible or liable for any special, incidental, social, or consequential losses (including loss of profits), punitive damages, injury, or damages of any kind solely attributable to defect or failure of its products.
- The manufacturer shall not be liable in any manner for issues related to or failure in the performance of any other equipment to which the product is connected.