2CSB204101R4630 ABB DDA204 A-63/0.5 RCD Block 4P 63A 500mA

Why Choose the ABB DDA204 A-63/0.5 RCD Block?

The ABB DDA204 A-63/0.5 is a four-pole Type A residual current device (RCD) block designed for assembly with compatible ABB miniature circuit breakers. As part of the ABB DDA200 RCD block series, it provides residual-current protection for electrical distribution systems in commercial, industrial and building applications.

This Type A RCD block is designed to detect sinusoidal alternating residual currents and pulsating DC residual currents. Its 500 mA rated residual operating current makes it suitable for circuits requiring earth leakage and fault protection at this sensitivity, helping protect electrical installations against the effects of insulation faults and unintended current flow to earth.

With a 63 A rated current, four-pole configuration and 230/400 V AC rated voltage, the DDA204 A-63/0.5 is suited to multi-pole circuits requiring Type A residual-current protection. When combined with a compatible ABB miniature circuit breaker, the resulting assembly provides residual-current protection alongside the MCB's overcurrent and short-circuit protection.

Key Advantages

• Four-pole RCD block for multi-pole electrical circuits.
• 63 A rated current for higher-current circuit protection applications.
• 500 mA rated residual operating current.
• Type A residual-current detection for sinusoidal AC and pulsating DC residual currents.
• Designed for combination with compatible ABB miniature circuit breakers.
• Suitable for commercial, industrial and building electrical distribution.

Key Features

• ABB DDA200 RCD block series.
• Four-pole configuration.
• 63 A rated current.
• 500 mA rated residual operating current.
• Type A residual-current characteristic.
• Detection of sinusoidal AC and pulsating DC residual currents.
• 230/400 V AC rated voltage.
• 50–60 Hz rated frequency.
• 500 V rated insulation voltage.
• 4 kV rated impulse withstand voltage.

Reliable Type A Residual-Current Protection

Residual current devices monitor the balance of current flowing through the active conductors of an electrical circuit. If an insulation fault or another leakage path causes current to flow to earth, the resulting imbalance can be detected so that the protected circuit is disconnected when the RCD block is correctly combined with its compatible circuit breaker.

Type A protection enables the DDA204 A-63/0.5 to respond to both sinusoidal alternating and pulsating DC residual currents. This makes it suitable for circuits containing electronic equipment capable of producing pulsating DC earth leakage, while the associated miniature circuit breaker provides overcurrent and short-circuit protection.

Typical Applications

• Commercial electrical distribution boards.
• Industrial distribution and control panels.
• Building-services electrical distribution systems.
• Four-pole circuits requiring 500 mA residual-current protection.
• Circuits containing electronic equipment capable of producing pulsating DC residual currents.
• ABB modular circuit protection assemblies.