Yueqing Vorax Electric CO.,LTD
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| Type | B HP (Type B HP RCD) for Heat Pump Application | |
| Electrical | ||
| Design according to | IEC/EN 62423, IEC/EN 61008-1 | |
| Current test marks as printed onto the device | ||
| Rated voltage Un | 2P: 230/240V AC | |
| 4P: 400/415V AC | ||
| Rated frequency fn | 50/60Hz | |
| Mode of operation | "A type functionality: voltage independent B HP type functionality: voltage dependent" | |
| Operation voltage electronic | 50 - 264V AC | |
| Voltage range test circuit | 2P: 184 - 264V AC | |
| 4P: 184 - 440V AC | ||
| Rated current In | 16A, 25A, 32A, 40A, 63A, 80A, 100A | |
| Rated residual operating current I△n | 30mA | |
| Sensitivity | Alternating, pulsed and smooth direct currents | |
| High frequency of 20kHZ and above | ||
| Tripping Thresholds | Mininum 150mA above 1KHZ | |
| Rated insulation voltage Ui | 500 V | |
| Rated impulse withstand voltage Uimp | 4 kV (1.2/50μs) | |
| Rated conditional short-circuit current Inc | 10 kA | |
| Rated making and breaking capacity Im | 1500 A | |
| Peak withstand current | 3 kA (8/20 μs) surge current proof 5 kA (8/20 μs) surge current proof for type S | |
| Electrical isolation | > 4 mm contact space | |
| Maximum back-up fuse In = 16-100A | Short circuit and overload protection 100 A gG/gL | |
| Endurance(operating cycles) | electrical components | ≥ 2000 |
| mechanical components | ≥ 4000 | |
| Mechanical | ||
| Degree of protection | IP20 | |
| Upper and lower terminals | open mounted / lift terminals | |
| Terminal capacity | 1 - 25 mm2 | |
| Terminal torque | 2 - 2.5 Nm | |
| Busbar thickness | 0.8 - 2 mm | |
| Operating temperature | -25°C ... +55°C | |
| Storage- and transport temperature | -40°C ... +70°C | |
| Resistance to climatic conditions | IEC/EN 61008 | |
| Contact position indicator | mechanical red / green | |
| Supply possibility | top or bottom | |
| Mounting position | any | |
VKL11B HP Type B HP RCD (Type B HP RCCB) for Heat Pump Application
VKL11B HP Type B HPRCD are unique devices specifically designed for heat pumps. While meeting the Type B device standard, VKL11B HP Type B HP RCDs can detect and trip under smooth DC faults at any level. Tested to operate at frequencies greater than 20 kHz, with a minimum tripping threshold of 150 mA for frequencies above 1 kHz.
Type B HP RCDs(VKL11B HP RCDs): Technical Overview
• Two pole two module 36MM: Space saving design enables easier installation using standard busbar.
• Compliance with BS 7671 Standards: These devices meet the requirements set out in BS 7671, ensuring they provide the necessary protection in modern electrical installations.
• Effective Operation at High Frequencies: Designed to function reliably at frequencies of 20 kHz and above, making them suitable for applications involving variable-speed drives and heat pump systems.
• Tripping Reliability:with a minimum tripping threshold of 150 mA for frequencies above 1 kHz
• Detection of Smooth DC Fault Currents: Capable of detecting and interrupting continuous smooth DC residual currents, which is essential for comprehensive fault protection in systems where such currents may be present.
Why Type B HP RCDs Are Essential for Heat Pumps
Modern heat pumps, especially those with inverter-driven compressors, create high- frequency electrical currents when converting AC to DC power. These can include smooth DC and high-frequency residual currents that regular Type B RCDs (designed for
50 Hz) may not detect properly.
Some installers mistakenly believe that Type B+ devices are suitable for heat pump applications. However, Type B+ is a VDE Standard and is not recognized by BS 7671.
What Makes Type B HP RCDs Different?
Type B HP RCDs are specially developed for use with heat pump systems. They meet all the requirements of standard Type B RCDs, but go a step further—they’re built to operate at frequencies above 20 kHz, which are common in modern heat pumps.
They also ensure reliable protection by tripping at a minimum threshold of 150 mA for frequencies over 1 kHz, offering an added layer of safety in high-frequency environments.This precision is critical for the reliable and safe operation of heat pumps.
Why Some Type B RCDs Trip at 1 kHz
Not all Type B RCDs are built to cope with the high-frequency currents produced by modern heat pumps. Some models are only rated to handle frequencies up to 1 kHz, which means they can trip unnecessarily when exposed to the higher-frequency residual currents these systems generate.
This can cause nuisance tripping and unexpected downtime. That’s why it’s important to use a Type B HP RCD—specifically designed to handle higher frequencies without compromising performance or reliability.
Which RCD to Use
AC - not suitable for heat pumps
A - unreliable tripping under smooth DC faults or high-frequency currents.
F - Limited high-frequency performanc e; ineffective against smooth DC faults.
B - Reliably detects and trips on smooth DC faults at all levels, though limited to frequencies up to 1 kHz..
B HP - Detects and trips on smooth DC faults at all levels. Verified to handle frequencies above 20 kHz with a minimum tripping threshold of 150mA above 1 kHz.
Wiring diagrams
