Lauritz Knudsen etaSMART R - APFC Controller, 1 CT, 415V AC | 14 Step for Contactor Switching | Size - 144*144 | Programmed for Capacitor Switching/Alarm Function/Fan Control
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Lauritz Knudsen etaSMART R - APFC Controller, 1 CT, 415V AC | 14 Step for Contactor Switching | Size - 144*144 | Programmed for Capacitor Switching/Alarm Function/Fan Control
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- Warranty
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Description
About the Product
The Lauritz Knudsen EasyLogic APFC Relay CS90904 is a premium-grade, high-precision Automatic Power Factor Correction (APFC) controller engineered for large electrical installations requiring ultra-accurate reactive power compensation & advanced capacitor bank management. Designed for industrial, commercial, & infrastructure applications, this intelligent relay helps improve power factor, optimize energy consumption, reduce electrical losses, & eliminate utility penalties through precise contactor-based capacitor switching.
The relay utilizes a single Current Transformer (1 CT) input configuration, allowing simplified installation while ensuring accurate load monitoring & power factor measurement. By continuously analyzing load conditions, reactive power demand, & power factor variations, the controller automatically switches capacitor stages ON or OFF to maintain the desired power factor & maximize system efficiency.
Equipped with a 14-step capacitor switching configuration, the EasyLogic APFC Relay CS90904 delivers exceptional correction accuracy & control flexibility. Compared to 4-step, 6-step, 8-step, & even 12-step APFC relays, the 14-step architecture provides superior load matching, finer compensation resolution, smoother switching performance, & enhanced responsiveness to highly dynamic load conditions.
This advanced control capability makes the relay particularly suitable for large industrial operations, heavy machinery installations, manufacturing facilities, utility infrastructure, & electrical distribution systems where power demand fluctuates continuously & accurate correction is essential for maintaining efficiency & system stability.
The relay intelligently controls capacitor bank utilization, helping prevent under-compensation, overcompensation, unnecessary switching operations, & capacitor bank imbalance. This improves equipment lifespan, reduces maintenance requirements, & enhances electrical network reliability.
Designed specifically for contactor-based switching systems, the controller offers dependable & efficient operation for conventional capacitor bank installations while maintaining exceptional correction performance.
The device features a user-friendly interface that simplifies setup, monitoring, & parameter configuration. Users can easily adjust settings such as target power factor, capacitor step sequence, switching delays, response times, alarm functions, & protection parameters according to specific application requirements.
Real-time monitoring & automatic control capabilities allow the relay to continuously adapt to changing load conditions while maintaining stable power factor correction & minimizing manual intervention. This helps optimize energy efficiency, improve power quality, & reduce operating costs.
As part of the Lauritz Knudsen EasyLogic product range, the APFC Relay CS90904 combines advanced functionality, industrial-grade reliability, ease of use, & cost-effective operation, making it an ideal solution for panel builders, contractors, system integrators, facility managers, & industrial operators.
The compact panel-mountable enclosure allows seamless integration into APFC panels, capacitor bank systems, switchboards, electrical distribution panels, & power quality management installations.
This APFC relay is an ideal solution for applications requiring ultra-high precision power factor correction, optimized energy utilization, enhanced power quality, & dependable performance in large & complex electrical systems.
How the Mechanism Works
The APFC relay functions by:
• Continuously monitoring load current using a single CT input
• Measuring power factor in real time
• Calculating reactive power requirements automatically
• Switching capacitor stages ON or OFF as required
• Maintaining the desired target power factor
• Providing highly precise 14-step capacitor bank control
• Preventing overcompensation & under-compensation
• Optimizing capacitor bank utilization
• Reducing electrical losses & utility penalties
• Improving overall power quality & system efficiency
It serves as an intelligent automatic control solution for advanced capacitor bank management & power factor correction.
Electrical Configuration
• Product Type: EasyLogic APFC Relay
• Model: CS90904
• CT Input Configuration: 1 CT
• Capacitor Control Steps: 14 Steps
• Switching Technology: Contactor-Based Switching
• Application Type: Automatic Power Factor Correction
• Installation Type: Panel Mounting
• Control Function: Automatic Capacitor Bank Management
• Primary Purpose: Power Factor Improvement & Energy Optimization
Construction & Design
Designed for reliability & advanced system control:
• Compact panel-mountable design
• Industrial-grade electronic architecture
• User-friendly display & interface
• Clear configuration & monitoring menus
• Durable long-life construction
• Easy integration into APFC panels
• Simple setup & commissioning
• Space-efficient installation design
• Reliable operation under dynamic loads
• Low maintenance requirements
Protection & Control Benefits
Helps optimize & protect electrical systems by:
• Improving power factor automatically
• Reducing reactive power demand
• Preventing utility penalty charges
• Avoiding overcompensation conditions
• Minimizing unnecessary capacitor switching
• Improving capacitor bank utilization
• Supporting stable electrical operation
• Enhancing power quality performance
• Reducing energy losses
• Extending equipment service life
Purpose & Function
• Automatically maintains target power factor
• Provides finer control than lower-step APFC relays
• Delivers ultra-precise correction for fluctuating loads
• Reduces electricity costs & demand penalties
• Optimizes capacitor bank efficiency
• Improves electrical network stability
• Minimizes manual supervision requirements
• Supports large & highly dynamic load applications
• Enhances overall energy savings
• Improves long-term system performance & reliability
Application Domains
• Large APFC Panels & Multi-Stage Capacitor Banks
• Industrial Plants & Heavy-Load Operations
• Manufacturing Facilities with Fluctuating Demand
• Commercial Complexes & Infrastructure Projects
• Utility & Power Distribution Systems
• Advanced Power Quality Management Systems
• Industrial Energy Management Applications
• Large Electrical Distribution Networks
• Infrastructure & Utility Installations
• High-Capacity Energy Optimization Projects
Key Features
• Lauritz Knudsen EasyLogic APFC relay
• Model: CS90904
• 1 CT input for simplified system integration
• 14-step capacitor switching control
• Designed for contactor-based switching systems
• Continuous monitoring of power factor & reactive power
• Enables ultra-precise correction for large & complex loads
• Configurable target power factor settings
• Adjustable switching delay parameters
• Adjustable capacitor step sequence settings
• Reduces energy losses & electricity penalties
• Prevents overcompensation & unnecessary switching cycles
• Optimizes capacitor usage & system performance
• Suitable for large industrial applications
• User-friendly interface
• Compact & panel-mountable design
• Industrial-grade durability & reliability
Applications
• Large APFC panels & multi-stage capacitor banks
• Industrial plants & heavy-load operations
• Manufacturing facilities with fluctuating demand
• Commercial complexes & infrastructure projects
• Utility & power distribution systems
• Advanced power quality management systems
• Industrial energy management installations
• High-capacity electrical distribution networks
• Infrastructure development projects
• Commercial & industrial power optimization systems
FAQs
1. What is an APFC relay used for?
Ans: It automatically controls capacitor banks to maintain optimum power factor, improve energy efficiency, reduce electrical losses, & avoid utility penalties.
2. What does 1 CT mean?
Ans: It means the relay uses one Current Transformer (CT) input for system load monitoring, power factor measurement, & automatic correction control.
3. What does 14-step control indicate?
Ans: It means the relay can control up to fourteen capacitor stages, providing ultra-fine & highly precise power factor correction for complex electrical systems.
4. Why choose a 14-step relay?
Ans: A 14-step APFC relay offers maximum correction accuracy, superior load matching, smoother capacitor switching, & exceptional adaptability to large systems with rapidly changing loads.
5. What type of switching does it support?
Ans: The EasyLogic APFC Relay CS90904 supports contactor-based switching, making it suitable for standard APFC panels & capacitor bank installations.
6. Where is this relay typically used?
Ans: It is commonly used in large industrial APFC panels, manufacturing facilities, utility projects, commercial complexes, & high-capacity electrical distribution systems.
7. What advantages does 14-step control provide?
Ans: The higher number of switching stages enables ultra-precise compensation, reduced switching stress, improved system stability, better capacitor utilization, & maximum energy efficiency.
8. What protection & optimization benefits does this relay provide?
Ans: It helps prevent overcompensation, reduces unnecessary switching cycles, minimizes capacitor bank imbalance, improves power quality, lowers operating costs, & supports long-term system reliability.
Overview
| Dimension 1 | 144 |
|---|---|
| Dimension 2 | 144 |
| Voltage input | 415 V |
| No. of CT inupts | 1 |
| No. of steps (For Contactor switching) | 14 |
| No. of steps (For Thyristor switching) | 0 |
| Discount Percentage | Between 0-10 % |
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 EasyLogic APFC Relay CS90904 is a premium-grade, high-precision Automatic Power Factor Correction (APFC) controller engineered for large electrical installations requiring ultra-accurate reactive power compensation & advanced capacitor bank management. Designed for industrial, commercial, & infrastructure applications, this intelligent relay helps improve power factor, optimize energy consumption, reduce electrical losses, & eliminate utility penalties through precise contactor-based capacitor switching.
The relay utilizes a single Current Transformer (1 CT) input configuration, allowing simplified installation while ensuring accurate load monitoring & power factor measurement. By continuously analyzing load conditions, reactive power demand, & power factor variations, the controller automatically switches capacitor stages ON or OFF to maintain the desired power factor & maximize system efficiency.
Equipped with a 14-step capacitor switching configuration, the EasyLogic APFC Relay CS90904 delivers exceptional correction accuracy & control flexibility. Compared to 4-step, 6-step, 8-step, & even 12-step APFC relays, the 14-step architecture provides superior load matching, finer compensation resolution, smoother switching performance, & enhanced responsiveness to highly dynamic load conditions.
This advanced control capability makes the relay particularly suitable for large industrial operations, heavy machinery installations, manufacturing facilities, utility infrastructure, & electrical distribution systems where power demand fluctuates continuously & accurate correction is essential for maintaining efficiency & system stability.
The relay intelligently controls capacitor bank utilization, helping prevent under-compensation, overcompensation, unnecessary switching operations, & capacitor bank imbalance. This improves equipment lifespan, reduces maintenance requirements, & enhances electrical network reliability.
Designed specifically for contactor-based switching systems, the controller offers dependable & efficient operation for conventional capacitor bank installations while maintaining exceptional correction performance.
The device features a user-friendly interface that simplifies setup, monitoring, & parameter configuration. Users can easily adjust settings such as target power factor, capacitor step sequence, switching delays, response times, alarm functions, & protection parameters according to specific application requirements.
Real-time monitoring & automatic control capabilities allow the relay to continuously adapt to changing load conditions while maintaining stable power factor correction & minimizing manual intervention. This helps optimize energy efficiency, improve power quality, & reduce operating costs.
As part of the Lauritz Knudsen EasyLogic product range, the APFC Relay CS90904 combines advanced functionality, industrial-grade reliability, ease of use, & cost-effective operation, making it an ideal solution for panel builders, contractors, system integrators, facility managers, & industrial operators.
The compact panel-mountable enclosure allows seamless integration into APFC panels, capacitor bank systems, switchboards, electrical distribution panels, & power quality management installations.
This APFC relay is an ideal solution for applications requiring ultra-high precision power factor correction, optimized energy utilization, enhanced power quality, & dependable performance in large & complex electrical systems.
How the Mechanism Works
The APFC relay functions by:
• Continuously monitoring load current using a single CT input
• Measuring power factor in real time
• Calculating reactive power requirements automatically
• Switching capacitor stages ON or OFF as required
• Maintaining the desired target power factor
• Providing highly precise 14-step capacitor bank control
• Preventing overcompensation & under-compensation
• Optimizing capacitor bank utilization
• Reducing electrical losses & utility penalties
• Improving overall power quality & system efficiency
It serves as an intelligent automatic control solution for advanced capacitor bank management & power factor correction.
Electrical Configuration
• Product Type: EasyLogic APFC Relay
• Model: CS90904
• CT Input Configuration: 1 CT
• Capacitor Control Steps: 14 Steps
• Switching Technology: Contactor-Based Switching
• Application Type: Automatic Power Factor Correction
• Installation Type: Panel Mounting
• Control Function: Automatic Capacitor Bank Management
• Primary Purpose: Power Factor Improvement & Energy Optimization
Construction & Design
Designed for reliability & advanced system control:
• Compact panel-mountable design
• Industrial-grade electronic architecture
• User-friendly display & interface
• Clear configuration & monitoring menus
• Durable long-life construction
• Easy integration into APFC panels
• Simple setup & commissioning
• Space-efficient installation design
• Reliable operation under dynamic loads
• Low maintenance requirements
Protection & Control Benefits
Helps optimize & protect electrical systems by:
• Improving power factor automatically
• Reducing reactive power demand
• Preventing utility penalty charges
• Avoiding overcompensation conditions
• Minimizing unnecessary capacitor switching
• Improving capacitor bank utilization
• Supporting stable electrical operation
• Enhancing power quality performance
• Reducing energy losses
• Extending equipment service life
Purpose & Function
• Automatically maintains target power factor
• Provides finer control than lower-step APFC relays
• Delivers ultra-precise correction for fluctuating loads
• Reduces electricity costs & demand penalties
• Optimizes capacitor bank efficiency
• Improves electrical network stability
• Minimizes manual supervision requirements
• Supports large & highly dynamic load applications
• Enhances overall energy savings
• Improves long-term system performance & reliability
Application Domains
• Large APFC Panels & Multi-Stage Capacitor Banks
• Industrial Plants & Heavy-Load Operations
• Manufacturing Facilities with Fluctuating Demand
• Commercial Complexes & Infrastructure Projects
• Utility & Power Distribution Systems
• Advanced Power Quality Management Systems
• Industrial Energy Management Applications
• Large Electrical Distribution Networks
• Infrastructure & Utility Installations
• High-Capacity Energy Optimization Projects
Key Features
• Lauritz Knudsen EasyLogic APFC relay
• Model: CS90904
• 1 CT input for simplified system integration
• 14-step capacitor switching control
• Designed for contactor-based switching systems
• Continuous monitoring of power factor & reactive power
• Enables ultra-precise correction for large & complex loads
• Configurable target power factor settings
• Adjustable switching delay parameters
• Adjustable capacitor step sequence settings
• Reduces energy losses & electricity penalties
• Prevents overcompensation & unnecessary switching cycles
• Optimizes capacitor usage & system performance
• Suitable for large industrial applications
• User-friendly interface
• Compact & panel-mountable design
• Industrial-grade durability & reliability
Applications
• Large APFC panels & multi-stage capacitor banks
• Industrial plants & heavy-load operations
• Manufacturing facilities with fluctuating demand
• Commercial complexes & infrastructure projects
• Utility & power distribution systems
• Advanced power quality management systems
• Industrial energy management installations
• High-capacity electrical distribution networks
• Infrastructure development projects
• Commercial & industrial power optimization systems
FAQs
1. What is an APFC relay used for?
Ans: It automatically controls capacitor banks to maintain optimum power factor, improve energy efficiency, reduce electrical losses, & avoid utility penalties.
2. What does 1 CT mean?
Ans: It means the relay uses one Current Transformer (CT) input for system load monitoring, power factor measurement, & automatic correction control.
3. What does 14-step control indicate?
Ans: It means the relay can control up to fourteen capacitor stages, providing ultra-fine & highly precise power factor correction for complex electrical systems.
4. Why choose a 14-step relay?
Ans: A 14-step APFC relay offers maximum correction accuracy, superior load matching, smoother capacitor switching, & exceptional adaptability to large systems with rapidly changing loads.
5. What type of switching does it support?
Ans: The EasyLogic APFC Relay CS90904 supports contactor-based switching, making it suitable for standard APFC panels & capacitor bank installations.
6. Where is this relay typically used?
Ans: It is commonly used in large industrial APFC panels, manufacturing facilities, utility projects, commercial complexes, & high-capacity electrical distribution systems.
7. What advantages does 14-step control provide?
Ans: The higher number of switching stages enables ultra-precise compensation, reduced switching stress, improved system stability, better capacitor utilization, & maximum energy efficiency.
8. What protection & optimization benefits does this relay provide?
Ans: It helps prevent overcompensation, reduces unnecessary switching cycles, minimizes capacitor bank imbalance, improves power quality, lowers operating costs, & supports long-term system reliability.
Overview
| Dimension 1 | 144 |
|---|---|
| Dimension 2 | 144 |
| Voltage input | 415 V |
| No. of CT inupts | 1 |
| No. of steps (For Contactor switching) | 14 |
| No. of steps (For Thyristor switching) | 0 |
| Discount Percentage | Between 0-10 % |
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.