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ETEK Electric offers a complete range of Type B RCCB and RCBO devices. The table below gives a quick overview of the main series and their typical applications.
| Series | Device type | Rated current | Poles | Typical applications | Downloads |
|---|---|---|---|---|---|
| EKL1-63B/ETL1-63B | Type B RCCB | 16-63 A | 1P+N / 3P+N | Main incomer, PV, drives, small EV boards | Datasheet |
| EKL6-100B | Type B RCCB | 16-100 A | 1P+N / 3P+N | Highpower incomer, EV cabinets, PV plants | Datasheet |
| EKL6-100BHP | Type B HP RCCB | 16-100 A | 1P+N / 3P+N | Heat pumps, inverter-driven HVAC | Datasheet |
| EKL6-100B+ | Type B+ RCCB | 16-100 A | 1P+N / 3P+N | UPS, data centers, medical power | Datasheet |
| EKL6-63EV | EV Type RCCB (IEC/EN 62955) | 16-63 A | 1P+N / 3P+N | EV charging circuits only | Datasheet |
| EKL563B / ETL563B | Type B RCBO | 6-63 A | 1P+N / 3P+N | Final circuits, EV chargers, PV strings | Datasheet |
| ETL363B | Compact Type B RCBO | 6-63 A | 1P+N | Retrofit boards with limited space | Datasheet |
| EKL1940B | 1module Type B RCBO | 6-40 A | IP+N | Spacecritical final circuits | Datasheet |
Type B RCCBs provide residual current protection and are used together with separate MCBs. They are ideal for main incomers and distribution boards where several circuits are grouped under one Type B device.
Type B RCBOs combine overcurrent and residual current protection in a single device. They are a good choice for final circuits where selective isolation, coordination and space saving in the distribution board are important.
Type B RCDs are used wherever DC components and high frequency leakage currents can appear. The scenarios below cover the most common applications.
| Application | Typical equipment | Type A | Type B | Type B HP | Type B+ | EV Type |
|---|---|---|---|---|---|---|
| PV inverters | String or hybrid inverters with DC input | |||||
| EV charging | AC wallbox, DC fast chargers | |||||
| Heat pumps | Inverterdriven compressors | |||||
| Variable speed drives | Industrial motor control | |||||
| UPS & battery systems | Online UPS, energy storage | |||||
| General socket circuits | Mixed residential or office loads |
RCCBs and RCBOs are used differently in distribution boards. The comparison below helps you select the right architecture for each project.
| Item | Type B RCCB | Type B RCBO |
|---|---|---|
| Main function | Residual current protection only (earthleakage). Requires separate MCBs for overcurrent and shortcircuit protection. | Combined residual current, overcurrent and shortcircuit protection in one device for each final circuit. |
| Typical position in board | As main incomer or as group RCD for several outgoing circuits (e.g. EV, PV, HVAC groups). | Directly on each final circuit (socket, charger, inverter, heat pump) where selectiveprotection is required. |
| Nurnber of devices | Fewer RCDs, but more MCBs. Suitable for boards with grouped loads | One RCBO per circuit. More devices, but each circuit is independent and easier totroubleshoot |
| Advantages in practice | Simple architecture and costefficient group protection. | Best selectivity. fast fault location, minimal impact on other circuits |
| DINrail space | RCCB + separate MCBs. Efficient when circuits are arranged in groups | Compact 1 or 2module RCBOs optimise space for many final circuits in limited width. |
| Typ cal ETEK series | EKL163B/ETL163B, EKL6100B, EKL6100BHP, EKL6100B+;EV Type RCCBEKL663EV for EV applications only | EKL563B/ETL563B(standard),ETL363B (compact 2module), EKL1940B (1modulefor spacecritical boards) |
| When to choose | Use Type B RCCBs as main incomer or group protection when several circuitscan share one residual current device | Use Type B RCBOs for individual EV chargers, heat pumps, PV strings, data racksand other critical loads |
The examples below show how Type B RCCB and RCBO devices are typically combined in practice.
The questions below summarise the main points when selecting and applying Type B RCDs.
A Type B RCD is an AC DC sensitive residual current device. It detects sinusoidal AC, pulsating DC, smooth DC and mixed frequency residual currents. Typical applications include EV charging stations, photovoltaic inverters, heat pumps, variable speed drives, UPS and frequency converters.
Standard Type B RCDs detect residual currents up to around 1 kHz. Type B+ extends this range up to 20 kHz and limits tripping current to 420 mA for enhanced fire protection. Type B HP is tuned for heat pumps and inverter driven HVAC systems with higher operating frequencies and a minimum tripping threshold of 150 mA above 1 kHz to reduce nuisance tripping.
No. EV Type RCDs (for example devices compliant with IEC/EN 62955) are designed only for electric vehicle charging circuits. They combine Type A protection with 6 mA smooth DC detection but must not be used as a substitute for Type B RCDs in other applications such as PV inverters, drives or UPS, where full Type B behaviour is required.
Use Type B RCCBs when central protection for several outgoing circuits is required, typically as main incomer or group RCD. Choose Type B RCBOs when individual final circuits need both overcurrent.
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