The RCMS system consists of one or more RCMS460-D/-L or RCMS490-D/-L residual current monitors, which are able to detect and evaluate fault, residual and operating currents in earthed power supplies via the related measuring current transformers. The maximum voltage of the system to be monitored depends on the nominal insulation voltage of the measuring current transformer used in the case of busbar systems, resp. depend on the cables or conductors that are routed through.
Features
Optional AC, pulsed DC or AC/DC sensitive measurement by selecting the respective measuring current transformer for each channel
True r.m.s. value measurement
12 measuring channels per device for residual current measurement or digital input
Up to 90 RCMS… monitors, up to1080 measuring channels in the system
Fast parallel scanning for all channels
Response ranges: 10 mA…10 A (0…2000 Hz), 6 mA…20 A (42…2000 Hz), 100 mA…125 A (42…2000 Hz) RCMS…-D4
Preset function
Adjustable time delays
The frequency response characteristics can be set for the protection of persons, fire and plant protection
History memory with date and time stamp for 300 data records
Data logger for 300 data records/channel
Analysis of the harmonics, DC, THD
Two alarm relays with one changeover contact each
Device version RCMS490 with one alarm contact per channel
N/O or N/C operation and fault memory selectable
Connection external test/reset button
Backlit graphical display (7-segment display) and alarm LEDs
