RCBO full form in electrical is a Residual Current Operated Circuit Breaker with Overcurrent Protection, is mainly used in applications that need both over-current protection (overload and short-circuit) and ground-fault current protection.
They can detect faults and trips in time to ensure the safety of staff and equipment. RCBO is the most functional, with short circuit, overload, leakage, and three kinds of protection functions.
RCBO supports all types of residual current protection, such as AC, A, B, and AP-R. It has a variety of breaking capacities that suitable for residential and industrial applications. The rated current of TOBLE-80 RCBO up to 80A supports user-defined pole numbers. They are suitable for a single-phase or three-phase power grid. Its rated residual current is from 10 to 500 mA.
RCBO is a low-voltage safety protection electrical appliance that is often installed in our common household distribution boxes to ensure body safety.
It is an effective protection for direct and indirect contact with electricity in the low-voltage power grid. The protection action current is determined by the maximum load current during the normal operation of the line.
RCBO reflects a residual current system, during normal operation, the system is almost zero residual currents. In the event of electric leakage and electric shock, the circuit will generate residual current, but this current is not enough to make the MCB and the fuse trip, and the leakage protector will trip reliably.
The width of RCBO is usually 18 mm, 36 mm (the same size as 2P RCCB RCD), or wider (the leakage protection module is separated from the MCB, but there are also integrated types of 72mm widths, such as our TOBLE-80 products).
RCBO can directly use the circuit loop to protect the loads, and it has leakage protection, short circuit and overload protection. Therefore, the system for terminal switches can be more flexible and compact.
There are used in single-phase (1P, 2P) lighting systems, three-phase four-wire distribution (3P, 4P) lines, or equipment that uses a working neutral wire, the neutral wire must pass through the RCBOs.
In general, RCBO’s natural pole does not have overload and leakage protection functions, only the connection and disconnection function, so the live wire is not allowed to be connected to the neutral pole, please pay attention to the product description and label information when you install them in circuits.
The wiring should be carried out in accordance with the power and load markings on the RCBOs, and the two cannot be reversed, unless there is a special instruction that the RCBO can be reversed. (Some RCBOs can be reversed, such as the RCBO type (TOBNS, TOBD5).
In a three-phase four-wire system or a three-phase five-wire system where single-phase and three-phase loads are mixed, the three-phase load should be balanced as much as possible.
|CE Marked||EN 61009-1|
|SAA Certified||AS/NZS 61009.1|
|CB Certified||IEC 61009-1|
RCBOs are easy to install and can be retrofitted into existing electrical systems. Unlike separate RCDs and MCBs, which require additional wiring and installation, RCBOs can be installed in the same way as a traditional circuit breaker. This makes it easy to upgrade your electrical system to a safer and more efficient RCBO-based system.
RCBOs are compact and space-saving, making them ideal for installations with limited space. Unlike traditional RCDs and MCBs, which require separate devices for each function, the RCBO combines both functions into a single device. This means you can achieve the same level of protection in a smaller space, allowing for more efficient use of your electrical panel.
The combination of RCD and MCB functions in the RCBO provides superior protection against electrical hazards. The RCD function detects any imbalances in the electrical current caused by faults in the circuit, such as current leakage to the ground, while the MCB function provides protection against overcurrents caused by overload or short circuit conditions. This dual protection greatly enhances the safety of your electrical system.
While RCBOs may have a higher initial cost than separate RCD and MCB devices, they offer significant cost savings in the long run. Since RCBOs are a single device that combines both functions, you save on the cost of purchasing and installing separate devices. Additionally, since RCBOs provide superior protection against electrical hazards, they can help prevent costly damage to your electrical system and equipment.
The main difference between an RCD and an RCBO is that an RCBO includes the functionality of an MCB, while an RCD does not. This means that an RCBO can provide protection against both current imbalances and overcurrents, while an RCD can only provide protection against current imbalances.
Another key difference between the two devices is the way they are installed. RCDs are typically installed on distribution panels as the main residual current circuit breaker, providing protection for multiple circuits simultaneously. On the other hand, RCBOs are generally installed directly in the circuits they protect, safeguarding individual circuits, but they can detect faults more precisely and trip the circuit breaker.
The choice between an RCD and an RCBO will depend on the specific needs of your electrical system. If you are looking for a simple and cost-effective solution to protect against current imbalances, an RCD may be the right choice. However, if you need protection against both current imbalances and overcurrents, or if you have limited space in your distribution board, an RCBO may be the better option.
Replacing electrical components can be a daunting task, especially when it comes to ensuring the safety of your home or workplace. If you’re considering replacing an RCD (Residual Current Device) with an RCBO (Residual Current Circuit Breaker with Overcurrent Protection), there are a few factors to consider.
First, an RCBO can provide more comprehensive protection than an RCD, it’s not always necessary to replace an RCD with an RCBO. If you have a standard circuit breaker installed alongside the RCD, it may already be providing overcurrent protection. In this case, replacing the RCD with an RCBO may not provide any additional benefit.
However, if your electrical system doesn’t have a circuit breaker or if the circuit breaker is not providing adequate protection, replacing the RCD with an RCBO can be a good idea. An RCBO provides the benefits of both an RCD and a circuit breaker in a single device, saving space and providing more efficient protection.
It’s important to note that replacing an RCD with an RCBO requires a licensed electrician. They will need to ensure that the new device is compatible with your electrical system and install it correctly to ensure maximum safety.