The residual current block (RCU) is designed for customer-side assembly with high-performance automatic circuit breakers from the S800 series. The resulting residual current/circuit breaker combinations (RCBOs) offer property protection as well as protection against electrically ignited fires. They ensure protection of 2P, 3P or 4P circuits against overload and short-circuit currents, protection against sinusoidal alternating currents and pulsating currents with a smooth DC residual current component of up to 6 mA against earth. As well as fault protection (protection against indirect contact), additional protection (with I n 30 mA) and fire protection (with I n 300 mA). They meet the product standard IEC/EN 60947-2. Areas of application are industrial applications. The extensive range of accessories offers you everything you need for your installation tasks., Optimal compromise between safety and operational continuity thanks to the interference immunity with surge current resistance (surge current form 8/20 s) = 3,000 A against unwanted triggering and 10 ms short-time delay.
| Property | Value |
| Nominal voltage: | 230 to 400 V |
| Delay time adjustable: | no |
| Rated residual current adjustable: | no |
| Nominal current: | 63 A |
| Residual current type: | A |
| Number of poles: | 3 |
| Rated residual current: | 0.03 A |
| Surge current strength: | 3 kA |
| Frequency: | 50/60 Hz |
| Rated insulation voltage Ui: | 690 V |
| Rated impulse withstand voltage Uimp: | 6 kV |
| Connectable conductor cross-section, single-wire: | 6 to 70 mm² |
| Connectable conductor cross-section, stranded: | 6 to 50 mm² |
| False tripping protection: | yes |
| With locking device: | no |
| Protection class (IP): | IP2X |
| Ambient temperature during operation: | -25 to 60 °C |
