Overview
The VKL11B Type B and VKL11B+ Type B+ residual current circuit breakers provide residual-current protection in AC 50/60 Hz installations that may generate alternating, pulsating DC or smooth DC residual currents. Type B detects frequencies up to 1 kHz, while Type B+ extends detection up to 20 kHz. The range includes 16 A to 100 A ratings, 2P and 4P configurations, and instantaneous, K short-time-delayed or T selective versions. It is intended for installations using frequency converters, photovoltaic systems, UPS systems and other electronically controlled equipment. Suitable overload and short-circuit protection must be provided separately.
Features
- Detects alternating, pulsating DC and smooth DC residual currents.
- High-frequency detection up to 1 kHz for Type B and 20 kHz for Type B+.
- Instantaneous, K short-time-delayed and T selective versions.
- Rated conditional short-circuit current of 10 kA.
- Mechanical red/green contact-position indicator.
- Top or bottom power entry and installation in any mounting position.
Models
| Variant | Residual-current detection | Frequency range | Additional characteristic |
|---|---|---|---|
| Type B | Alternating, pulsating DC and smooth DC residual currents | Up to 1 kHz | Universal current-sensitive RCCB |
| Type B+ | Full Type B detection capability | Up to 20 kHz | Additional tripping values below 420 mA |
Specifications
Electrical Data
| Parameter | Specification |
|---|---|
| Product versions | Type B and Type B+ RCCB |
| Rated current (In) | 16, 25, 32, 40, 63, 80, 100 A |
| Rated voltage (Un) | 2P: 230/240 V AC; 4P: 400/415 V AC |
| Rated frequency | 50/60 Hz |
| Electronic operating voltage | 50-264 V AC |
| Test circuit voltage range | 2P: 184-264 V AC; 4P: 184-440 V AC |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 4 kV (1.2/50 μs) |
| Rated conditional short-circuit current (Inc) | 10 kA |
| Rated making and breaking capacity (Im) | 1,500 A |
| Maximum backup fuse | 100 A gG/gL for short-circuit and overload protection |
Protection Data
| Parameter | Specification |
|---|---|
| Detected residual currents | Alternating, pulsating DC and smooth DC residual currents |
| High-frequency detection | Type B: up to 1 kHz; Type B+: up to 20 kHz |
| Mode of operation | Type A functionality: voltage independent; Type B/B+ functionality: voltage dependent |
| Peak withstand current | 3 kA (8/20 μs); 5 kA for the selective version |
| Electrical isolation | Contact gap greater than 4 mm |
| Degree of protection | IP20 |
Mechanical Data
| Parameter | Specification |
|---|---|
| Electrical endurance | ≥2,000 operating cycles |
| Mechanical endurance | ≥4,000 operating cycles |
| Contact-position indicator | Mechanical red/green indicator |
Installation Data
| Parameter | Specification |
|---|---|
| Terminal type | Open/lift terminals |
| Terminal capacity | 1-25 mm² |
| Terminal tightening torque | 2-2.5 N·m |
| Busbar thickness | 0.8-2 mm |
| Power entry | Top or bottom |
| Mounting position | Any position |
Environmental and Standards Data
| Parameter | Specification |
|---|---|
| Storage and transport temperature | -40°C to +70°C |
| Climatic resistance | According to IEC/EN 61008 |
| Design standards | IEC/EN 62423, IEC/EN 61008-1, OVE E8601; Type B+ additionally references VDE 0664-400 |
Selection Guide
| Code position | Meaning | Catalog value or options |
|---|---|---|
| V | VIOX enterprise identification | V |
| KL | RCCB product family code | KL |
| 11 | Design serial number | 11 |
| B / B+ | Residual current type | B or B+ |
| Rated-current code | Rated current | 16, 25, 32, 40, 63, 80 or 100 A |
| Residual-current code | Rated residual operating current | 30, 100, 300 or 500 mA, depending on variant and time characteristic |
| 2P / 4P | Number of poles | 2P or 4P |
Type B or Type B+
Select Type B for residual-current detection up to 1 kHz or Type B+ for full Type B detection capability up to 20 kHz.
Rated Current
Choose one of the listed ratings from 16 A to 100 A to match the circuit rating.
Tripping Option
Select an instantaneous, K short-time-delayed or T selective version with a compatible residual operating-current rating.
Poles and Voltage
Select 2P for 230/240 V AC or 4P for 400/415 V AC installations.
Trip Curves
| Time characteristic | Type B rated IΔn | Type B+ rated IΔn |
|---|---|---|
| Instantaneous | 30, 100, 300, 500 mA | 30, 100, 300 mA |
| K short-time delayed (G/ASi) | 30, 100, 300, 500 mA | 30, 100, 300 mA |
| T selective | 100, 300, 500 mA | 100, 300 mA |
Dimensions
Applications
- Frequency converters and variable-speed machinery.
- Photovoltaic and UPS systems.
- Electric vehicle charging equipment.
- Medical equipment.
Installation
- Use the RCCB together with suitable overload and short-circuit protection.
- Use conductors within the listed terminal capacity of 1-25 mm².
- Apply the listed terminal tightening torque of 2-2.5 N·m.
- Use busbars within the listed thickness range of 0.8-2 mm.
- Power entry may be made from the top or bottom, and the device may be installed in any mounting position.
FAQ
Which residual currents can the VKL11B detect?
Type B and Type B+ detect alternating, pulsating DC and smooth DC residual currents.
What is the difference between Type B and Type B+?
Type B detects residual-current frequencies up to 1 kHz. Type B+ extends the frequency range up to 20 kHz and additionally references VDE 0664-400.
Which rated currents and pole configurations are available?
The range covers 16, 25, 32, 40, 63, 80 and 100 A in 2P and 4P configurations.
Which tripping options are offered?
The catalog lists instantaneous, K short-time-delayed and T selective versions. Available residual operating-current ratings depend on the selected variant and time characteristic.
Does the VKL11B provide overload and short-circuit protection?
The catalog specifies that the RCCB must be used together with suitable overload and short-circuit protection.
Which standards are listed?
Type B references IEC/EN 62423, IEC/EN 61008-1 and OVE E8601. Type B+ additionally references VDE 0664-400.
