Lauritz Knudsen Capacitor Duty Contactors, MO C, 40kVAr, 415V 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, 40kVAr, 415V AC | 3 Pole | 1 Built-in Auxiliary Contacts | AC-6b| Heavy‑Duty Contacts for Long‑Term Durability
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- Warranty
- Reviews
Description
About the Product
The Lauritz Knudsen MO C Capacitor Duty Contactor 40kVAR 3P 440V AC (AC 6b) with In-Built 1NO Auxiliary Contact & 415V AC Coil (50–60 Hz) is a robust industrial switching device engineered for efficient control of large-capacity capacitor banks used in power factor correction (PFC) systems. With a 40kVAR rating & a 3 pole configuration, it is ideally suited for heavy-duty industrial & commercial electrical installations requiring dependable capacitor switching.
Designed for AC 6b duty applications, this contactor is specifically developed for capacitive load switching, capable of handling high inrush currents generated during capacitor energization. It incorporates advanced pre-charge contact technology with damping resistors, which effectively limit surge currents, protect capacitor banks, & significantly enhance system reliability & service life.
The integrated 1 normally open (1NO) auxiliary contact enables flexible operation for automation, signaling, & control circuits, while the 415V AC coil (50–60 Hz) allows direct high-voltage operation, eliminating the need for external control transformers & simplifying panel design. Built with high-quality materials & precision engineering, this contactor ensures safe switching, durability, & consistent performance in demanding industrial environments.
Purpose & Function
This capacitor duty contactor is designed for heavy-duty power factor correction systems:
• Switches large capacitor banks to improve power factor
• Handles high inrush current during capacitor energization
• Reduces switching transients & electrical stress
• Enables automation in PFC panels
• Improves system efficiency & performance
Electrical Configuration
• Product type: Capacitor Duty Contactor
• Model: MO C
• Rated capacity: 40kVAR
• Number of poles: 3P
• Voltage rating: 440V AC
• Utilization category: AC 6b (capacitor duty)
• Auxiliary contacts: In-built 1NO
• Coil voltage: 415V AC
• Frequency: 50–60 Hz
• Function: Capacitor bank switching & power factor correction
Construction & Design
Engineered for heavy-duty capacitor switching operations:
• Special contact design optimized for capacitive loads
• Built-in pre-charge resistors for inrush current limitation
• Integrated auxiliary contact for control functionality
• Rugged & durable construction for industrial panels
• High mechanical & electrical endurance
Safety & Protection
• Minimizes inrush current during capacitor switching
• Protects capacitor banks & electrical systems
• Reduces voltage spikes & switching disturbances
• Enhances lifespan of electrical components
• Ensures safe & reliable switching operations
Mounting & Installation
• Suitable for panel mounting in PFC systems
• Compact design for optimized space utilization
• Easy & secure installation process
• Simplified wiring with in-built auxiliary contact
• Designed for seamless integration into capacitor panels
Application Domains
• Power factor correction (PFC) panels
• Large capacitor bank switching systems
• Industrial power distribution networks
• Electrical control panels
• Manufacturing & process industries
• Commercial electrical installations
Key Features
• 40kVAR capacitor duty contactor
• 3-pole configuration for three-phase systems
• AC 6b duty for capacitive loads
• In-built 1NO auxiliary contact
• 415V AC coil (50–60 Hz)
• Direct high-voltage operation capability
Applications
• Large 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 40kVAR capacitor duty contactor?
Ans: It is ideal for large capacitor bank control in industrial PFC systems.
3. What is the role of pre-charge resistors?
Ans: They limit the initial surge current during capacitor energization to protect system components.
4. What is the function of a 1NO auxiliary contact?
Ans: It provides additional control, signaling, & automation capability.
5. Where is this contactor used?
Ans: It is used in PFC panels, industrial plants, & high-load electrical systems.
6. What is the advantage of a 415V coil?
Ans: It enables direct operation in high-voltage control circuits without requiring transformers.
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 | 415 V AC |
| Rated operational current at 415V | 52.5A |
| Discount Percentage | Between 0-10 % |
| No. of Poles | 3P |
| Height(mm) | 123.5 |
| Width(mm) | 55 |
| Depth(mm) | 163 |
| Rated kW | 40kVAr |
| Coil Operating band %Uc (Pick up) | 75 - 110 % |
| Mechanical Life | 10 million |
| Coil Operating band %Uc (Drop off) | 35 - 65 % |
| Pick up VA consumption | 144VA |
| Hold on VA consumption | 15VA |
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 40kVAR 3P 440V AC (AC 6b) with In-Built 1NO Auxiliary Contact & 415V AC Coil (50–60 Hz) is a robust industrial switching device engineered for efficient control of large-capacity capacitor banks used in power factor correction (PFC) systems. With a 40kVAR rating & a 3 pole configuration, it is ideally suited for heavy-duty industrial & commercial electrical installations requiring dependable capacitor switching.
Designed for AC 6b duty applications, this contactor is specifically developed for capacitive load switching, capable of handling high inrush currents generated during capacitor energization. It incorporates advanced pre-charge contact technology with damping resistors, which effectively limit surge currents, protect capacitor banks, & significantly enhance system reliability & service life.
The integrated 1 normally open (1NO) auxiliary contact enables flexible operation for automation, signaling, & control circuits, while the 415V AC coil (50–60 Hz) allows direct high-voltage operation, eliminating the need for external control transformers & simplifying panel design. Built with high-quality materials & precision engineering, this contactor ensures safe switching, durability, & consistent performance in demanding industrial environments.
Purpose & Function
This capacitor duty contactor is designed for heavy-duty power factor correction systems:
• Switches large capacitor banks to improve power factor
• Handles high inrush current during capacitor energization
• Reduces switching transients & electrical stress
• Enables automation in PFC panels
• Improves system efficiency & performance
Electrical Configuration
• Product type: Capacitor Duty Contactor
• Model: MO C
• Rated capacity: 40kVAR
• Number of poles: 3P
• Voltage rating: 440V AC
• Utilization category: AC 6b (capacitor duty)
• Auxiliary contacts: In-built 1NO
• Coil voltage: 415V AC
• Frequency: 50–60 Hz
• Function: Capacitor bank switching & power factor correction
Construction & Design
Engineered for heavy-duty capacitor switching operations:
• Special contact design optimized for capacitive loads
• Built-in pre-charge resistors for inrush current limitation
• Integrated auxiliary contact for control functionality
• Rugged & durable construction for industrial panels
• High mechanical & electrical endurance
Safety & Protection
• Minimizes inrush current during capacitor switching
• Protects capacitor banks & electrical systems
• Reduces voltage spikes & switching disturbances
• Enhances lifespan of electrical components
• Ensures safe & reliable switching operations
Mounting & Installation
• Suitable for panel mounting in PFC systems
• Compact design for optimized space utilization
• Easy & secure installation process
• Simplified wiring with in-built auxiliary contact
• Designed for seamless integration into capacitor panels
Application Domains
• Power factor correction (PFC) panels
• Large capacitor bank switching systems
• Industrial power distribution networks
• Electrical control panels
• Manufacturing & process industries
• Commercial electrical installations
Key Features
• 40kVAR capacitor duty contactor
• 3-pole configuration for three-phase systems
• AC 6b duty for capacitive loads
• In-built 1NO auxiliary contact
• 415V AC coil (50–60 Hz)
• Direct high-voltage operation capability
Applications
• Large 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 40kVAR capacitor duty contactor?
Ans: It is ideal for large capacitor bank control in industrial PFC systems.
3. What is the role of pre-charge resistors?
Ans: They limit the initial surge current during capacitor energization to protect system components.
4. What is the function of a 1NO auxiliary contact?
Ans: It provides additional control, signaling, & automation capability.
5. Where is this contactor used?
Ans: It is used in PFC panels, industrial plants, & high-load electrical systems.
6. What is the advantage of a 415V coil?
Ans: It enables direct operation in high-voltage control circuits without requiring transformers.
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 | 415 V AC |
| Rated operational current at 415V | 52.5A |
| Discount Percentage | Between 0-10 % |
| No. of Poles | 3P |
| Height(mm) | 123.5 |
| Width(mm) | 55 |
| Depth(mm) | 163 |
| Rated kW | 40kVAr |
| Coil Operating band %Uc (Pick up) | 75 - 110 % |
| Mechanical Life | 10 million |
| Coil Operating band %Uc (Drop off) | 35 - 65 % |
| Pick up VA consumption | 144VA |
| Hold on VA consumption | 15VA |
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.