Lauritz Knudsen AU HR MCB, 1 Pole, D Curve, 15kA, 125A, 240V | Suitable for Isolation | Protection Degree - IP 20
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Lauritz Knudsen AU HR MCB, 1 Pole, D Curve, 15kA, 125A, 240V | Suitable for Isolation | Protection Degree - IP 20
- Description
- Specifications
- Documents
- Warranty
- Reviews
Description
About the Product
The AU HR MCB 125A SP 240V AC 15kA D Curve is a high-capacity Miniature Circuit Breaker engineered to provide robust protection against overloads & short circuits in demanding electrical environments. It is ideal for industrial, commercial, & heavy-duty installations where very high starting currents are common.
With a 125A current rating & a high breaking capacity of 15kA, this MCB ensures safe interruption of fault currents under extreme conditions. The D Curve tripping characteristic makes it especially suitable for circuits with very high inrush currents such as motors, transformers, compressors, & heavy industrial equipment.
How the MCB Works
This MCB provides advanced protection through automatic monitoring & fast tripping response:
• Continuously monitors current flow in the circuit
• Trips during prolonged overload conditions
• Instantly disconnects the circuit during short circuit faults
• Allows high surge currents during startup without nuisance tripping
This ensures safe & efficient operation of high-demand electrical equipment.
Electrical Configuration
• Rated current: 125A
• Poles: Single pole (SP)
• Rated voltage: 240V AC
• Breaking capacity: 15kA
• Tripping curve: D Curve
• Function: Overload & short circuit protection
• Application: High inrush current circuits
Construction & Design
The MCB is designed for durability & high performance in demanding conditions:
• D Curve tripping optimized for high surge current applications
• High 15kA breaking capacity for extreme fault protection
• Compact modular design compatible with DIN rail mounting
• Advanced arc extinguishing system for safe operation
• Reliable & consistent tripping characteristics
Safety & Protection
• Protects against overload & short circuit faults
• Designed to handle high inrush currents without unnecessary tripping
• Prevents damage to electrical equipment & wiring
• Enhances reliability in heavy-duty applications
• Improves overall system safety & operational stability
Mounting & Durability
• DIN rail mountable for easy installation
• Suitable for distribution boards & industrial 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-duty machinery & equipment
• Commercial installations with high surge loads
• High current distribution systems
Key Features
• 125A rated MCB for very high load applications
• Single pole (SP) configuration
• 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 machinery installations
• Commercial electrical systems
• High inrush current equipment
FAQs
1. What does D Curve mean in this MCB?
Ans: D Curve indicates the breaker is suitable for circuits with very high inrush currents such as motors & transformers.
2. What is the importance of 15kA breaking capacity?
Ans: It ensures the MCB can safely interrupt high fault currents up to 15kA.
3. Where is a 125A D Curve MCB used?
Ans: It is used in heavy-duty applications like industrial motors, compressors, & transformer circuits.
4. Does this MCB protect against overload?
Ans: Yes, it provides protection against both overload & short circuit conditions.
5. What does SP mean?
Ans: SP stands for single pole, protecting one phase conductor in a circuit.
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 MCB instead of C Curve?
Ans: D Curve is preferred for high surge loads as it prevents nuisance tripping while still ensuring strong protection.
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 | SP |
| 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) | 26.3 |
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 SP 240V AC 15kA D Curve is a high-capacity Miniature Circuit Breaker engineered to provide robust protection against overloads & short circuits in demanding electrical environments. It is ideal for industrial, commercial, & heavy-duty installations where very high starting currents are common.
With a 125A current rating & a high breaking capacity of 15kA, this MCB ensures safe interruption of fault currents under extreme conditions. The D Curve tripping characteristic makes it especially suitable for circuits with very high inrush currents such as motors, transformers, compressors, & heavy industrial equipment.
How the MCB Works
This MCB provides advanced protection through automatic monitoring & fast tripping response:
• Continuously monitors current flow in the circuit
• Trips during prolonged overload conditions
• Instantly disconnects the circuit during short circuit faults
• Allows high surge currents during startup without nuisance tripping
This ensures safe & efficient operation of high-demand electrical equipment.
Electrical Configuration
• Rated current: 125A
• Poles: Single pole (SP)
• Rated voltage: 240V AC
• Breaking capacity: 15kA
• Tripping curve: D Curve
• Function: Overload & short circuit protection
• Application: High inrush current circuits
Construction & Design
The MCB is designed for durability & high performance in demanding conditions:
• D Curve tripping optimized for high surge current applications
• High 15kA breaking capacity for extreme fault protection
• Compact modular design compatible with DIN rail mounting
• Advanced arc extinguishing system for safe operation
• Reliable & consistent tripping characteristics
Safety & Protection
• Protects against overload & short circuit faults
• Designed to handle high inrush currents without unnecessary tripping
• Prevents damage to electrical equipment & wiring
• Enhances reliability in heavy-duty applications
• Improves overall system safety & operational stability
Mounting & Durability
• DIN rail mountable for easy installation
• Suitable for distribution boards & industrial 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-duty machinery & equipment
• Commercial installations with high surge loads
• High current distribution systems
Key Features
• 125A rated MCB for very high load applications
• Single pole (SP) configuration
• 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 machinery installations
• Commercial electrical systems
• High inrush current equipment
FAQs
1. What does D Curve mean in this MCB?
Ans: D Curve indicates the breaker is suitable for circuits with very high inrush currents such as motors & transformers.
2. What is the importance of 15kA breaking capacity?
Ans: It ensures the MCB can safely interrupt high fault currents up to 15kA.
3. Where is a 125A D Curve MCB used?
Ans: It is used in heavy-duty applications like industrial motors, compressors, & transformer circuits.
4. Does this MCB protect against overload?
Ans: Yes, it provides protection against both overload & short circuit conditions.
5. What does SP mean?
Ans: SP stands for single pole, protecting one phase conductor in a circuit.
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 MCB instead of C Curve?
Ans: D Curve is preferred for high surge loads as it prevents nuisance tripping while still ensuring strong protection.
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 | SP |
| 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) | 26.3 |
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.