The FI block (RCU) is designed for customer-side installation with high-performance automatic circuit breakers from the S800 series. The resulting FI/LS combinations (RCBOs) offer property protection as well as protection against electrically ignited fires. They guarantee 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.
| Property | Value |
| Nominal voltage: | 230 to 400 V |
| Delay time adjustable: | no |
| Rated residual current adjustable: | no |
| Nominal current: | 100 A |
| Residual current type: | A |
| Number of poles: | 4 |
| Rated residual current: | 0.5 A |
| Surge current strength: | 0.25 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: | no |
| With locking device: | no |
| Protection class (IP): | IP2X |
| Ambient temperature during operation: | -25 to 60 °C |
