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Device overview Residual current monitoring systems RCMS460/490

The RCMS system is a multi-channel residual current monitoring system that is designed to monitor up to 12 measuring points or measuring channels per device. In combination with several devices it is capable of monitoring up to 1080 channels. The RCMS is suitable for alternating respectively pulsed and smooth DC residual currents, depending on the selected type of measuring current transformer.

4.0

Examples of application

Type

Fields of application

Type of distribution system Classification acc. to IEC 60755 Residual current display range Type A (r.m.s) Residual current display range Type B (r.m.s) Rated frequency Type A/Type B

Device features – Response values/contacts

Number of measuring channels I
∆n or I/O Response value l
∆n2 (alarm), AC/DC sensitive Type B, pulsed DC, AC sensitive Type AResponse value l
∆n1 (prewarning), AC/DC sensitive Type B, pulsed DC, AC sensitive Type A Response time for all channels Response delay t
on RCMS-basic system Starting delay t Delay on release t
off Interface Common alarm relay for all channels Alarm relay per channel

Measuring current transformers

External measuring current transformer Type A External measuring current transformer Type B

Displays

Power On LED, alarm LED Alarm LED per channel Seven-segment display LC graphics display (backlit)

General features

CT connection monitoring TEST/RESET button, internal/external History memory 300 data records Fault memory behaviour Analysis of the harmonics I
n Data logger (300 data records per channel) Preset function Master/Slave function Parameter setting function Internal clock Address range BMS bus Display error code Frequency response characteristics, adjustable RCMS490 system with switching function per measuring channel Language Approvals 10 Main catalogue part 4 – 04.2007/Residual current monitors, Residual current monitoring systems