Residual current monitoring device RCM 202-AB The RCM 202-AB is used with connected current transformers to measure and monitor residual currents of type A, B and B+ in TN and TT systems (earthed AC systems).Supply voltage:85 ... 305 V AC (50/60Hz)- Residual current measurement via up to two connected current transformers- Transformer connection monitoring for wire breakage or short circuit per channel- Recording, evaluation and monitoring of residual currents of type A and B in accordance with IEC 62020- Recording of sinusoidal alternating residual currents with frequencies up to 20 kHz (type B+)- Measured value and extreme value memory with time stampMeasuring channels- Two current transformer connections (compatible with all Janitza residual current transformers)- Measuring range AC/DC: 10mA ... 20AMeasured value display and operation- Two-color LED display (128 x 64 Pixel)- 3-button operation- German, English and Spanish user interface selectableCommunication- RS485 interface (protocol: Modbus RTU)- Compatible with all communication-capable Janitza Modbus master devices
| Property | Value |
| Number of contacts as normally closed: | 2 |
| Type of voltage for actuation: | AC |
| Max. permissible response delay time: | 10 s |
| Design of the electrical connection: | Plug connection |
| Number of contacts as normally open: | 2 |
| Min. adjustable response delay time: | 0.01 s |
| Response value current 1: | 30 to 20000 mA |
| Rated frequency: | 45 to 65 Hz |
| Response value current 2: | 30 to 20000 mA |
| Width: | 71 mm |
| Height: | 90 mm |
| Depth: | 73 mm |
| With removable Terminals: | yes |
| Function: | for mixed networks |
| Display of the residual current: | yes |
| Fault storage possible: | yes |
| Rated control supply voltage Us at AC 50 Hz: | 90 to 276 V |
| Rated control supply voltage Us at AC 60 Hz: | 90 to 276 V |
