Lewden BRCBO-B32/30/1HP 32A B Curve 30mA Type B-HP Heat Pump RCBO 6kA

Enhanced Type B RCBO Protection for Heat Pump Installations

The Lewden BRCBO-B32/30/1HP is a specialist 32A B Curve Type B-HP RCBO developed for modern heat pump installations requiring enhanced residual current protection. Combining 30mA RCD protection with overload and short-circuit protection, it provides a compact all-in-one protective solution for compatible heat pump circuits.

Lewden's B-HP Heat Pump RCBO technology is designed to meet applications where heat pump manufacturers specify Type F, Type B or an enhanced Type B RCD capable of dealing with higher-frequency residual currents. The B-HP range is operational at frequencies of 20kHz and above, while catering for frequencies up to 20kHz with a minimum trigger point of 150mA above 1kHz.

Its compact 18mm single-module format is particularly useful where consumer unit space is limited, avoiding the separate MCB required when using a Type B RCCB.

Key Features

• Lewden B-HP Heat Pump RCBO
• Product code BRCBO-B32/30/1HP
• 32A rated current
• B Curve overcurrent characteristic
• Enhanced Type B / Type B-HP residual current protection
• 30mA residual current rating
• 6kA short-circuit breaking capacity
• Specifically designed for heat pump applications
• Operational at frequencies of 20kHz and above
• Enhanced high-frequency residual current response
• Minimum trigger point of 150mA above 1kHz
• Combined RCD and overcurrent protection
• 1 pole + switched neutral
• Bi-directional operation
• Compact 1-module design
• Only 18mm wide
• DIN rail mounting
• Suitable for standard Lewden RCBO consumer units
• Can be used in compatible Lewden High Integrity circuits
• Certified to BS EN/IEC 61009-1
• Certified to BS EN/IEC 62423
• Operating temperature from -25°C to +40°C

Purpose-Designed for Heat Pump Circuits

Modern heat pumps commonly incorporate inverter-driven compressors and sophisticated power electronics. These components can produce residual-current waveforms and frequencies that differ from those associated with conventional electrical loads.

As a result, many heat pump manufacturers specify Type F or Type B RCD protection, while some require an enhanced Type B device capable of dealing with significantly higher frequencies.

The Lewden B-HP range has been developed specifically for this type of application, making the BRCBO-B32/30/1HP a dedicated solution for compatible 32A heat pump circuits.

Enhanced Type B-HP Residual Current Protection

The defining feature of the BRCBO-B32/30/1HP is its enhanced Type B-HP residual current characteristic.

Some heat pump manufacturers require an enhanced Type B RCD capable of catering for frequencies up to 20kHz, with a minimum trigger point of 150mA at frequencies above 1kHz.

Lewden's B-HP RCBO is designed to provide the required residual-current functionality while remaining operational at 20kHz and above, making it suitable where these enhanced characteristics are specified by the heat pump manufacturer.

RCBO Combines Two Protective Functions

The BRCBO-B32/30/1HP is an RCBO – Residual Current Circuit Breaker with Overcurrent protection.

It combines:

• Residual current protection
• Overload protection
• Short-circuit protection

This is an important advantage over a Type B RCCB, which provides residual current protection but requires suitable separate overcurrent protection.

By integrating these functions into one device, Lewden provides a much more compact solution for appropriately designed heat pump circuits.

Compact 18mm Single-Module Design

One of the most significant benefits of the Lewden B-HP range is its single-module 18mm width.

A traditional installation using a Type B RCCB plus an associated MCB can require approximately three consumer unit modules. The BRCBO-B32/30/1HP combines these functions into just one 18mm module.

This helps preserve valuable consumer unit capacity and can make the product particularly attractive for heat pump upgrades to existing electrical installations.

32A B Curve Overcurrent Protection

This variant is rated at 32A and features a B Curve tripping characteristic.

It is designed for heat pump circuits where a 32A B Curve device is appropriate according to the heat pump manufacturer's requirements and the electrical design of the circuit.

Lewden's B-HP family is available in 16A, 20A, 25A, 32A and 40A ratings, with B Curve and C Curve variants allowing the protective device to be selected according to the requirements of the connected equipment.

30mA Residual Current Rating

The BRCBO-B32/30/1HP has a 30mA rated residual operating current, providing additional protection against electric shock as part of a correctly designed electrical installation.

The enhanced B-HP characteristics are particularly important where the connected heat pump can generate residual-current frequencies outside the range addressed by more conventional RCD types.

6kA Short-Circuit Breaking Capacity

With a 6kA short-circuit breaking capacity, the BRCBO-B32/30/1HP provides integral short-circuit protection as well as overload and residual current protection.

This eliminates the need to pair the device with a separate MCB solely to obtain overcurrent protection, helping reduce both installation complexity and consumer unit space requirements.

Bi-Directional Operation

The Lewden B-HP RCBO is bi-directional, providing greater installation flexibility for compatible electrical systems.

This feature makes the device suitable for modern electrical arrangements where bi-directional capability is required as part of the circuit design.

1 Pole + Switched Neutral

The BRCBO-B32/30/1HP uses a 1 pole plus switched neutral configuration.

This provides switched-neutral functionality while maintaining the highly compact 18mm single-module footprint, making it particularly convenient for modern domestic and light-commercial consumer unit installations.

Compatible with Lewden Consumer Units

Lewden B-HP RCBOs can be installed within a standard Lewden RCBO consumer unit, providing a straightforward solution for new heat pump installations using compatible Lewden distribution equipment.

They can also be installed as one of the High Integrity circuits within compatible Lewden:

• Dual RCCB consumer units
• Split Load consumer units
• Dual Tariff consumer units

This flexibility is particularly useful when adding a dedicated heat pump circuit to an existing compatible Lewden installation.

BS EN/IEC Certified

Lewden specifies its B-HP Heat Pump RCBO range as certified to:

BS EN/IEC 61009-1 – covering residual current operated circuit breakers with integral overcurrent protection.

BS EN/IEC 62423 – covering Type F and Type B residual current operated circuit breakers.

The specified operating temperature range is -25°C to +40°C.

• Brand: Lewden
• Range: B-HP Heat Pump RCBO
• Product Code: BRCBO-B32/30/1HP
• Product Type: Heat Pump RCBO
• RCD Classification: Enhanced Type B / Type B-HP
• Rated Current: 32A
• Trip Curve: B Curve
• Rated Residual Current: 30mA
• Short-Circuit Breaking Capacity: 6kA
• Number of Poles: 1 Pole + Switched Neutral
• Bi-Directional: Yes
• Module Width: 1 Module
• Width: 18mm
• Residual Current Protection: Yes
• Overload Protection: Yes
• Short-Circuit Protection: Yes
• High-Frequency Operation: 20kHz and Above
• Enhanced Frequency Capability: Up to 20kHz
• Minimum Trigger Point Above 1kHz: 150mA
• Mounting: DIN Rail
• Operating Temperature: -25°C to +40°C
• Standard: BS EN/IEC 61009-1
• Type B Standard: BS EN/IEC 62423
• Primary Application: Heat Pump Circuit Protection
• Consumer Unit Compatibility: Suitable Lewden RCBO Consumer Units & Compatible High Integrity Ways

Suitable Applications

• Air Source Heat Pumps
• Ground Source Heat Pumps
• Inverter-Driven Heat Pumps
• Domestic Heat Pump Systems
• Commercial Heat Pump Systems
• Dedicated Heat Pump Circuits
• Low-Carbon Heating Systems
• Residential Electrical Installations
• Commercial Electrical Installations
• Lewden Consumer Units
• High Integrity Consumer Unit Circuits
• Heat Pumps Requiring Enhanced Type B Protection

Why Choose the Lewden BRCBO-B32/30/1HP?

The Lewden BRCBO-B32/30/1HP offers a compact protective solution specifically developed for modern heat pump circuits where an enhanced Type B residual-current characteristic is required.

It combines 32A B Curve overcurrent protection, 30mA residual current protection and a 6kA short-circuit breaking capacity within a single device, while the specialist Type B-HP characteristic is designed to cater for the higher-frequency residual currents associated with certain heat pump systems.

Its 18mm single-module construction is a major practical advantage. Instead of using a Type B RCCB alongside a separate MCB, installers can provide both residual-current and overcurrent protection from one compact device, saving valuable consumer unit space.

With bi-directional operation, 1 pole plus switched neutral configuration and compatibility with suitable Lewden consumer units, the BRCBO-B32/30/1HP is an excellent choice where a heat pump manufacturer or electrical design specifies its particular enhanced Type B-HP protection characteristics.