Residual current monitoring system LINETRAXX® RCMA420
continuousdigital

residual current monitoring system
residual current monitoring system
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Characteristics

Type
residual current
Other characteristics
continuous, digital

Description

The AC/DC sensitive residual current monitor RCMA420 is designed for monitoring earthed power supply systems (TN and TT systems) where smooth DC fault currents or residual currents continuously greater than zero may occur. These are in particular loads containing six-pulse rectifiers or one way rectifiers with smoothing, such as converters, battery chargers, construction site equipment with frequency-controlled drives. Currents in single conductors can be monitored too. The prewarning stage (50…100 % of the set response value IΔn2) allow to distinguish between prewarning and alarm. Since the values are measured with measuring current transformers, the device is nearly independent of the load current and the nominal voltage of the system. • AC/DC sensitive residual current monitor Type B acc. to IEC 62020 and IEC/TR 60755 • r.m.s. value measurement (AC+DC) • Two separately adjustable response values 10…500 mA • Frequency range 0…2000 Hz • Start-up delay, response delay and delay on release • Digital measured value display via LC display • Measured value memory for operating value • CT connection monitoring • LEDs: Power On, Alarm 1, Alarm 2 • Internal/external test/reset button • Two separate alarm relays (one changeover contact each) • N/O or N/C operation and fault memory behaviour selectable • Continuous self monitoring • Multi-functional LC display • Password protection for device settings • Sealable transparent cover • Two-module enclosure (36 mm) • RoHS compliant • Push-wire terminal (two terminals per connection) Applications • AC/DC sensitive residual current monitoring in earthed two, three or four conductor systems (TN and TT systems)

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Hannover 2024
Hannover 2024

22-26 Apr 2024 Hannover (Germany) Hall 12 - Stand D62

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