RCMS490CH-D4-2 Differenzstrom Auswertegerät, mehrkanalig.

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. For MRCD applications in conjunction with circuit breakers

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

- RCMS490 device variant with one signaling contact per channel

- 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

- RCMS490 device variant with one signaling contact per channel

- Working/quiescent current and fault memory behavior selectable

- External reset/test button connection

- Illuminated graphic display (7-segment display) and signaling 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

- Common alarm relay for all channels 2x1 changeover contact

- Alarm relay per channel 12x1 NO contact

- Special firmware suitable for Swiss applications

- External measuring current transformers: Series

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

- Dimensions: W 162 x H 90 x D 74mm

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

- Displays Error code

- Harmonic analysis (IΔ, DC, THD)

- History memory for 300 data records

- Data logger for 300 data records per channel

- Internal clock, password, language GB, D, F

Applications:

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

- 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

Installation position:

According to the technical device manual: Display-oriented = horizontal