The residual current monitoring modules of the RCMB300 series are intended for measuring AC and DC fault currents in earthed systems (TN and TT systems). The modules are able to measure residual currents up to IΔ = 20 A in a frequency range of DC…100 kHz.
Two separately adjustable response values allow a distinction to be made between prewarning and alarm. When the response value IΔn2 (alarm) is reached, the output relays K1 and K2 switch.
The modules feature an RS-485 interface with Modbus RTU which can be used to transfer measured values and alarm values. Setting parameters is also possible via this interface.
The residual current monitoring modules each consist of the RCMB301 evaluation electronics and a CTBC20(P)…210(P) series measuring current transformer core. To assemble a complete module, both the electronics and a measuring current transformer core are required; if ordered separately, these two components must then be plugged together and calibrated during commissioning.
The measuring current transformer cores of the CTBC20P…210P series feature an integrated magnetic shield and are suitable for applications with high load currents or inrush currents.
|CE Declarations of Conformity||CTxx||89.3 KB||2022/11/04 06:57:2904.11.2022 06:57:29|
|CE Declarations of Conformity||RCMB30x||88.1 KB||2022/11/23 07:29:4223.11.2022 07:29:42|
|Datasheets||RCMB300-series||659.7 KB||EN||2021/03/15 12:33:5415.03.2021 12:33:54||D00372|
|Quickstarts||RCMB300-series||322.3 KB||EN||2019/06/13 08:31:1413.06.2019 08:31:14||D00372|
|Manuals||RCMB300-series||733.7 KB||EN||2019/06/13 08:30:5813.06.2019 08:30:58||D00372|
|Manuals||CTBC series||1.0 MB||EN||2021/11/24 10:20:5924.11.2021 10:20:59||D00336|
|Interface converter USB to RS-485||B95012045|
|Terminal block for RCMB301 module*||B74043124|
|Snap-on mounting for CTBC20 and CTBC20P*||B91080111|
|Snap-on mounting for CTBC35 and CTBC35P*||B91080112|
* included in scope of delivery
|Type||max. connected current transformers||Art. No.|
|STEP-PS/1 AC/24 DC/0.5||4||B94053110|
|STEP-PS/1 AC/24 DC/1.75||14||B94053111|
|STEP-PS/1 AC/24 DC/4.2||34||B94053112|
|Type||Supply voltage US||Variant||Art. No.|
|RCMB301||DC 24 V (19.2…28.8 V)||Modbus RTU||B74043100|
Required terminals are included in the scope of delivery.
Measuring current transformers
|Type||Internal diameter||Art. No.|
P = full magnetic shield