Lauritz Knudsen AU High Rating MCB, 2 Pole, D Curve, 15kA, 125A, 240V AC
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Lauritz Knudsen AU High Rating MCB, 2 Pole, D Curve, 15kA, 125A, 240V AC
- Description
- Specifications
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- Warranty
- Reviews
Description
About the Product
The AU HR MCB 125A DP 240V AC 15kA D Curve is a high-capacity Miniature Circuit Breaker engineered for robust protection against overloads & short circuits in demanding electrical environments. It is ideal for industrial, commercial, & heavy-duty applications where very high starting currents are common, such as motors, transformers, compressors, & large electrical systems.
With a 125A current rating & a high 15kA breaking capacity, this MCB ensures safe interruption of fault currents even under extreme conditions. The double pole (DP) configuration enables simultaneous disconnection of both phase & neutral conductors, ensuring complete circuit isolation & enhanced safety.
How the MCB Works
This MCB provides advanced circuit protection through automatic monitoring & fast tripping response:
• Continuously monitors current flow in the circuit
• Trips when overload conditions persist
• Instantly disconnects supply during short circuit faults
• Simultaneously isolates both phase & neutral conductors
• Handles high inrush currents without nuisance tripping
This ensures stable operation of heavy-duty electrical equipment while maintaining system safety.
Electrical Configuration
• Rated current: 125A
• Poles: Double pole (DP)
• Rated voltage: 240V AC
• Breaking capacity: 15kA
• Tripping curve: D Curve
• Function: Overload & short circuit protection
• Application: High inrush current single-phase circuits
Construction & Design
The MCB is built for durability & high-performance operation:
• Double pole design for full phase & neutral isolation
• D Curve tripping optimized for very high surge current loads
• High 15kA breaking capacity for extreme fault protection
• Compact modular design suitable for DIN rail mounting
• Advanced arc extinguishing mechanism
• Reliable & consistent tripping characteristics
Safety & Protection
• Protects against overload & short circuit faults
• Handles very high inrush currents without unnecessary tripping
• Ensures complete isolation of both phase & neutral
• Prevents damage to wiring & connected equipment
• Enhances safety & reliability in heavy-duty applications
Mounting & Durability
• DIN rail mountable for easy installation
• Suitable for distribution boards & industrial control panels
• Compact modular construction
• Designed for long mechanical & electrical lifespan
• Reliable under continuous high-load & frequent operation
Application Domains
• Industrial electrical systems
• Motor & transformer circuits
• Heavy machinery & compressors
• Commercial high-load installations
• High current single-phase distribution systems
Key Features
• 125A rated MCB for very high load applications
• Double pole (DP) configuration for phase & neutral isolation
• 15kA high breaking capacity
• D Curve for high inrush current circuits
• Reliable overload & short circuit protection
• Compact DIN rail mountable design
• Durable & long service life
Applications
• Industrial motor circuits
• Transformer protection systems
• Heavy-duty machinery installations
• Commercial electrical systems
• High inrush current equipment
FAQs
1. What does DP mean in this MCB?
Ans: DP (Double Pole) means the breaker disconnects both phase & neutral simultaneously for complete circuit isolation.
2. What does D Curve indicate?
Ans: D Curve is designed for circuits with very high inrush currents such as motors, transformers, & compressors.
3. What is the importance of 15kA breaking capacity?
Ans: It ensures safe interruption of high fault currents up to 15kA.
4. Where is a 125A D Curve DP MCB used?
Ans: It is used in heavy-duty applications with high starting currents such as industrial motors & machinery.
5. Does it isolate both conductors?
Ans: Yes, it provides protection & isolation for both phase & neutral conductors.
6. How is this MCB installed?
Ans: It is mounted on a DIN rail inside a distribution board or control panel.
7. Why use a D Curve DP MCB?
Ans: It prevents nuisance tripping in high surge current applications while ensuring reliable protection & full circuit isolation.
Overview
| Discount Percentage | Between 0-10 % |
|---|---|
| Operating Temperature Range | -25°C to +60° C |
| Electrical life (Operating Cylces) | 5,000 |
| Tightening Torque | 4Nm |
| Termination capacity | 70 Sq. mm (Rigid) 50 Sq. mm (Flexible) |
| Mechanical Life (Operating Cycles) | 20,000 |
| No. of Poles | DP |
| Rated Insulation Voltage Ui (V) | 500V |
| Rated Frequency | 50Hz/60Hz |
| Rated Short-circuit Breaking Capacity | 15kA |
| Rated Impulse Voltage | 6kV |
| Current Rating | 125A |
| Rated operational voltage (Ue) | 240V |
| Conformance to Standards | IEC 60947-2 |
| Tripping Characteristic | D Curve |
| Length(mm) | 77.5 |
| Height(mm) | 100.6 |
| Breadth(mm) | 52.6 |
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 AU HR MCB 125A DP 240V AC 15kA D Curve is a high-capacity Miniature Circuit Breaker engineered for robust protection against overloads & short circuits in demanding electrical environments. It is ideal for industrial, commercial, & heavy-duty applications where very high starting currents are common, such as motors, transformers, compressors, & large electrical systems.
With a 125A current rating & a high 15kA breaking capacity, this MCB ensures safe interruption of fault currents even under extreme conditions. The double pole (DP) configuration enables simultaneous disconnection of both phase & neutral conductors, ensuring complete circuit isolation & enhanced safety.
How the MCB Works
This MCB provides advanced circuit protection through automatic monitoring & fast tripping response:
• Continuously monitors current flow in the circuit
• Trips when overload conditions persist
• Instantly disconnects supply during short circuit faults
• Simultaneously isolates both phase & neutral conductors
• Handles high inrush currents without nuisance tripping
This ensures stable operation of heavy-duty electrical equipment while maintaining system safety.
Electrical Configuration
• Rated current: 125A
• Poles: Double pole (DP)
• Rated voltage: 240V AC
• Breaking capacity: 15kA
• Tripping curve: D Curve
• Function: Overload & short circuit protection
• Application: High inrush current single-phase circuits
Construction & Design
The MCB is built for durability & high-performance operation:
• Double pole design for full phase & neutral isolation
• D Curve tripping optimized for very high surge current loads
• High 15kA breaking capacity for extreme fault protection
• Compact modular design suitable for DIN rail mounting
• Advanced arc extinguishing mechanism
• Reliable & consistent tripping characteristics
Safety & Protection
• Protects against overload & short circuit faults
• Handles very high inrush currents without unnecessary tripping
• Ensures complete isolation of both phase & neutral
• Prevents damage to wiring & connected equipment
• Enhances safety & reliability in heavy-duty applications
Mounting & Durability
• DIN rail mountable for easy installation
• Suitable for distribution boards & industrial control panels
• Compact modular construction
• Designed for long mechanical & electrical lifespan
• Reliable under continuous high-load & frequent operation
Application Domains
• Industrial electrical systems
• Motor & transformer circuits
• Heavy machinery & compressors
• Commercial high-load installations
• High current single-phase distribution systems
Key Features
• 125A rated MCB for very high load applications
• Double pole (DP) configuration for phase & neutral isolation
• 15kA high breaking capacity
• D Curve for high inrush current circuits
• Reliable overload & short circuit protection
• Compact DIN rail mountable design
• Durable & long service life
Applications
• Industrial motor circuits
• Transformer protection systems
• Heavy-duty machinery installations
• Commercial electrical systems
• High inrush current equipment
FAQs
1. What does DP mean in this MCB?
Ans: DP (Double Pole) means the breaker disconnects both phase & neutral simultaneously for complete circuit isolation.
2. What does D Curve indicate?
Ans: D Curve is designed for circuits with very high inrush currents such as motors, transformers, & compressors.
3. What is the importance of 15kA breaking capacity?
Ans: It ensures safe interruption of high fault currents up to 15kA.
4. Where is a 125A D Curve DP MCB used?
Ans: It is used in heavy-duty applications with high starting currents such as industrial motors & machinery.
5. Does it isolate both conductors?
Ans: Yes, it provides protection & isolation for both phase & neutral conductors.
6. How is this MCB installed?
Ans: It is mounted on a DIN rail inside a distribution board or control panel.
7. Why use a D Curve DP MCB?
Ans: It prevents nuisance tripping in high surge current applications while ensuring reliable protection & full circuit isolation.
Overview
| Discount Percentage | Between 0-10 % |
|---|---|
| Operating Temperature Range | -25°C to +60° C |
| Electrical life (Operating Cylces) | 5,000 |
| Tightening Torque | 4Nm |
| Termination capacity | 70 Sq. mm (Rigid) 50 Sq. mm (Flexible) |
| Mechanical Life (Operating Cycles) | 20,000 |
| No. of Poles | DP |
| Rated Insulation Voltage Ui (V) | 500V |
| Rated Frequency | 50Hz/60Hz |
| Rated Short-circuit Breaking Capacity | 15kA |
| Rated Impulse Voltage | 6kV |
| Current Rating | 125A |
| Rated operational voltage (Ue) | 240V |
| Conformance to Standards | IEC 60947-2 |
| Tripping Characteristic | D Curve |
| Length(mm) | 77.5 |
| Height(mm) | 100.6 |
| Breadth(mm) | 52.6 |
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.