4.9 Based on 1167 reviews 
Description
3 Pole 40A D Curve 10kA Miniature Circuit Breaker
Live Electrical Three Phase MCB – CB340D
The Live Electrical CB340D 3 Pole 40A D Curve 10kA MCB offers robust protection for commercial 3-phase systems that experience high inrush currents. Its D Curve tripping characteristic makes it ideal for circuits with heavy inductive loads, such as motors, transformers, and industrial machinery.
Additionally, with a 10kA breaking capacity, this MCB ensures the safe handling of fault currents, offering a dependable solution for budget-conscious projects that still require high-quality performance.
Key Features:
- 3 Pole 40A MCB: Designed for 3-phase systems, rated at 40 Amps for handling heavy loads.
- D Curve Tripping Characteristic: Suited for circuits with high inrush currents, such as motors, transformers, and machinery, tripping at 10 to 20 times the rated current.
- 10kA Breaking Capacity: Protects circuits by safely handling fault currents up to 10kA, preventing overloads and short circuits.
- Voltage Rating: Compatible with 230/400V systems, operating at a frequency of 50/60Hz.
- Durability: Rated for 8,000 electrical operations and 20,000 mechanical operations, ensuring long-lasting performance.
- IP20 Protection: Prevents accidental contact with live parts, enhancing safety in commercial and industrial environments.
Technical Specifications:
- Poles: 3P
- Rated Voltage (Ue AC): 230/400V
- Frequency: 50/60Hz
- Insulation Voltage (Ui): 500V
- Breaking Capacity: 6/10kA
- Impulse Withstand Voltage: 4000V
- Dielectric Test Voltage: 2kV
- Thermo-magnetic Release: B, C, D Characteristics
- Electrical Life: 8,000 operations
- Mechanical Life: 20,000 operations
- IP Rating: IP20
- Ambient Temperature: -5°C to +40°C (daily average ≤35°C)
- Storage Temperature: -25°C to +70°C
FAQs:
1. What is a D Curve MCB used for?
A D Curve MCB trips when the current exceeds 10 to 20 times the rated load, making it ideal for circuits with high inrush currents, such as motors, transformers, or industrial machinery.
2. Can this MCB be used in 3-phase systems?
Yes, this 3-pole MCB is designed for 3-phase systems, providing reliable protection for circuits handling up to 40 amps in commercial and industrial setups.
3. Why is the 10kA breaking capacity important?
The 10kA breaking capacity ensures the MCB can safely handle fault currents up to 10,000 amps. This is essential for preventing overloads and short circuits in high-demand applications.
4. How durable is this MCB?
This MCB is highly durable, rated for 8,000 electrical operations and 20,000 mechanical operations, ensuring long-term reliability in heavy-duty environments.
5. Can this MCB operate in extreme temperatures?
Yes, it operates efficiently between -5°C and +40°C and can be stored safely in conditions ranging from -25°C to +70°C, making it suitable for various environments.
Conclusion
The Live Electrical CB340D 3 Pole 40A D Curve 10kA MCB is an affordable and reliable solution for circuits with high inrush currents, such as motors and heavy machinery. Its D Curve tripping characteristic and 10kA breaking capacity make it ideal for commercial 3-phase systems that require dependable protection. Additionally, this MCB offers long-lasting performance, making it a great choice for projects where both quality and budget are key considerations.
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