Máy cắt mạch dòng rò VKL11B 4P (RCCB)

Introduction to VKL11B/B+ Residual Current Circuit Breakers

The VIOX VKL11B series represents our advanced line of universal residual current circuit breakers (RCCBs), engineered for maximum electrical safety in both domestic and industrial applications. Available in both Type B and Type B+ variants, these devices offer superior protection against various forms of residual current, including smooth DC currents that conventional RCDs cannot detect.

Built with electronic technology for precise residual current measurement, the VKL11B RCCB delivers enhanced reliability with reduced unwanted tripping and immunity to magnetization issues that commonly affect standard mechanical devices.

What Makes the VKL11B RCCB Series Different?

The VKL11B RCCB differentiates itself through its comprehensive detection capabilities across multiple residual current types:

• Sinusoidal AC residual currents
• Pulsed DC residual currents
• Alternating residual sinusoidal currents up to 1000Hz
• Pulsating direct residual currents
• Smooth direct residual currents (a key advantage over standard RCDs)

This versatility makes the VKL11B RCCB suitable for modern electrical systems where conventional protection devices may not provide adequate safety coverage.

VKL11B vs VKL11B+: Understanding the Difference

While both variants share the same compact design and core functionality, the key differences lie in their frequency detection capabilities and tripping characteristics:

Thông số kỹ thuật chính

Thông số kỹ thuật điện

Thông số kỹ thuật cơ khí

VKL11B 2P  (RCCB) Dimension

Sơ đồ đấu dây RCCB VKL11B 2P

Tripping Characteristics and Protection Features

The VKL11B RCCB offers differentiated protection levels based on the residual current magnitude:

30mA

Provides additional protection against direct contact with live parts. This sensitivity level is essential for circuits accessible to the general public or untrained personnel.

100mA

Co-ordinated with the earth system (when earth resistance I∆n < 50Ω), providing effective protection against indirect contacts.

300mA

Designed for protection against indirect contacts and as fire hazard prevention in high-risk areas.

Tripping Time Options

• Tức thời: Ensures immediate tripping without time delay
• Short time delay: Brief predetermined delay before tripping
• Selective (time delay): Longer delay for coordination with other protection devices

Applications: Where to Use VKL11B RCCBs

The VKL11B is specifically designed for applications vulnerable to smooth DC residual currents, making it ideal for:

• Frequency converters with three-phase connection
• Medical equipment including X-ray machines and CT scanners
• Photovoltaic installations and UPS systems
• EV charging stations and connection points
• Elevator controllers
• Pipeline trace heating systems
• Laboratory test setups
• Construction sites (compliant with BGI 608 regulations)
• Battery-powered forklift truck charging stations
• Crane electrical systems
• Industrial mixing plants with connected loads
• Variable-speed machine tools (milling machines, grinding equipment, lathes)

Lắp đặt và Kích thước

The VKL11B RCCB features a compact design with clearly defined dimensions for easy installation in electrical panels:

• Width: 2-pole models – 35.8mm; 4-pole models – 71.7mm
• Height: 81.5mm
• Depth: 74mm

The device can be mounted in any orientation and accepts supply connections from either top or bottom terminals. Installation should follow standard DIN rail mounting procedures, with proper terminal tightening to the specified torque values.

Certifications and Compliance

The VKL11B RCCB series is manufactured in accordance with the following standards:

• IEC/EN 62423
• IEC/EN 61008-1
• OVE E8601
• VDE 0664-400

The devices carry UKCA and CE certification marks, confirming their compliance with relevant European safety standards and regulations.

Key Advantages of VKL11B RCCB

1. Bảo vệ nâng cao: Detects and responds to all types of residual current, including smooth DC current that standard RCDs cannot detect
2. Electronic Technology: More accurate residual current measurement compared to mechanical devices
3. Reduced Unwanted Tripping: Advanced detection algorithms minimize nuisance trips
4. No Magnetization Issues: Unlike mechanical RCDs, the electronic tripping unit doesn’t suffer from magnetization problems
5. Ứng dụng đa năng: Suitable for both domestic and industrial environments
6. Dải tần số: Type B+ variant offers protection up to 20kHz, ideal for high-frequency applications
7. Thiết kế nhỏ gọn: Space-saving dimensions for electrical panel installation
8. Clear Status Indication: Mechanical red/green indicator shows contact position
9. Nhiều mức đánh giá hiện tại: Available in various rated currents from 16A to 100A
10. Different Sensitivity Options: 30mA, 100mA, 300mA, and 500mA variants for tailored protection

When to Choose VKL11B+ Over Standard VKL11B

Select the VKL11B+ (Type B+) variant for:

• Applications with high-frequency equipment operating up to 20kHz
• Systems requiring enhanced surge current tolerance (5kA vs 3kA)
• Installations where voltage-dependent functionality is preferred
• Applications with specialized equipment generating frequencies above 1kHz

The standard VKL11B (Type B) is suitable for most general applications where frequencies remain below 1kHz and basic protection against smooth DC residual currents is required.

Selection Guide: Choosing the Right VKL11B RCCB

To select the appropriate VKL11B RCCB for your application, consider the following factors:

1. Rated Current (In): Choose based on the maximum load current of the protected circuit
2. Sensitivity (I∆n): Select 30mA for personnel protection, 100-300mA for fire protection or equipment safety
3. Người Ba Lan: 2-pole for single-phase systems, 4-pole for three-phase systems
4. Kiểu: B for standard applications, B+ for high-frequency applications
5. Tripping Time: Instantaneous for general protection, selective (time-delayed) for coordination with other protective devices

Technical FAQ

What is the difference between Type A, Type B, and Type B+ RCCBs?

Type A RCCBs detect AC sinusoidal and pulsating DC residual currents. Type B RCCBs add detection of smooth DC residual currents up to 1kHz. Type B+ extends frequency detection up to 20kHz for specialized applications.

Can I replace a standard RCCB with a VKL11B RCCB?

Yes, the VKL11B can replace standard RCCBs and will provide enhanced protection. However, note that Type B devices are more specific to certain applications and may be more costly than Type A or AC types for general use.

Why might I need a Type B RCCB instead of a standard Type A?

Type B RCCBs are essential when equipment may generate smooth DC residual currents, such as with frequency converters, UPS systems, EV chargers, and medical equipment. Standard Type A RCCBs cannot detect these currents, creating a potential safety gap.

What is the maximum back-up protection required?

The VKL11B series requires a maximum back-up fuse of 100A gG/gL for short circuit and overload protection.

Can the VKL11B RCCB be installed in outdoor applications?

The VKL11B has an IP20 protection rating, meaning it must be installed in a suitable enclosure if used in outdoor or harsh environments.

Kết luận

The VIOX VKL11B series of residual current circuit breakers represents the pinnacle of electrical protection technology, offering comprehensive safety for modern electrical systems. With their ability to detect and respond to all types of residual currents, including smooth DC currents that conventional devices cannot detect, these RCCBs provide essential protection for specialized applications in both industrial and domestic settings.

The differentiation between Type B and Type B+ variants allows for precise selection based on specific application requirements, ensuring optimum protection across various electrical systems. When selecting an RCCB for applications involving frequency converters, medical equipment, EV charging stations, or other technology that may generate DC residual currents, the VKL11B RCCB provides the reliable protection necessary for both equipment safety and personnel protection.