RCMS460CH-L-2 Residual current evaluator, multi-channel

The residual current monitoring system (RCMS system) consists of one or more RCMS460-D/-L or RCMS490-D/-L residual current monitoring devices, which can detect and evaluate residual, residual and operating currents in earthed power supplies via the associated measuring current transformers. The maximum voltage of the monitored network depends on the rated insulation voltage of the measuring current transformers used in busbar systems or the cables or lines used.

The closed measuring current transformers of the W...AB series are required for all-current sensitive measured value acquisition (in accordance with IEC/TR 60755: type B). One AN420 or AN110 power supply unit is required for every 6 W...AB series measuring current transformers.

The W... (closed), WR... (rectangular), WS... (split-core) and WF... (flexible) series measuring current transformers are used for alternating and pulsating currents (according to IEC/TR 60755: type A).

The various measuring current transformers can be connected to the measuring channels of the monitoring devices in any combination. Each RCMS460-D/-L and RCMS490-D/-L has 12 measuring channels. A total of up to 90 residual current monitoring devices can be connected via BMS bus (RS-485 interface with BMS protocol) and thus up to 1080 measuring channels (outgoing circuits) can be monitored.

The frequency response can be set accordingly for use in personal, fire and system protection. The measured currents can be analyzed for harmonics.

Main features:

Alternative to iso-testing in accordance with DGUV V3

Choice of AC, pulse or universal current sensitive measurement by selecting the measuring current transformer for each channel

Preset function

Analysis of harmonics, DC, THF

Adjustable frequency behavior for personal, fire and system protection

Features and functions:

Choice of AC, pulse or universal current sensitive measurement by selecting the measuring current transformer for each channel

True effective value measurement (r.m.s.)

12 measuring channels per individual device for residual current measurement or digital input

Up to 90 RCMS... monitoring devices, 1080 measuring channels in the system

Fast parallel monitoring 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

Adjustable frequency behavior for personal, fire and system protection

History memory with time stamp for 300 data records

Data logger for 300 data records/channel

Analysis of harmonics, DC, THD

Two alarm relays with 1 changeover contact each

Working/quiescent current and fault memory behavior selectable

External reset/test button connection

Illuminated graphic display (7-segment display) and indicator LEDs

Data exchange via BMS bus

Password protection for device settings

Permanent measuring current transformer connection monitoring

RoHS-compliant

Technical features:

Number of measuring channels per device: 12

Special firmware suitable for Swiss applications

External measuring current transformers: Series

W..., WR..., WS..., (type A), series W...AB(type B)

7-segment display for error code

LED line for alarm from 1 to 12

Dimensions: W 108 x H 90 x D 74mm

Power supply: DC 70...276V, AC 42-460 Hz 70...276V

Applications:

Measuring and evaluating residual, fault and rated currents of loads and systems in the frequency range 0...2000 Hz (measuring current transformers W...AB), 42...2000 Hz (measuring current transformers W..., WR..., WS..., WF...)

Monitoring of fire-hazardous currents in operating facilities at risk of fire

EMC monitoring of TN-S systems for "stray" currents and additional N-PE bridges

Monitoring of N conductors for overload due to harmonics

Monitoring PE and PA conductors for absence of current

Monitoring of residual currents in stationary electrical systems and equipment to determine practical test intervals in accordance with accident prevention regulation BGV A3 and the German Ordinance on Industrial Safety and Health BetrSichV.

Personal and fire protection through fast shutdown

Monitoring of digital inputs