LINETRAXX® RCM420

The AC and pulsed DC sensitive residual current monitor RCM420-D (Type A) from Bender is designed for fault and residual current monitoring in earthed power supply systems (TN and TT systems) where an alarm is to be activated in the event of a fault, but disconnection must be prevented. In addition, the device can be used to monitor single conductors, such as PE conductors, N-PE connections and PE-PAS connections.

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.

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The AC and pulsed DC sensitive residual current monitor RCM420-D (Type A) from Bender is designed for fault and residual current monitoring in earthed power supply systems (TN and TT systems) where an alarm is to be activated in the event of a fault, but disconnection must be prevented. In addition, the device can be used to monitor single conductors, such as PE conductors, N-PE connections and PE-PAS connections.

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.

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Caratteristiche

AC and pulsed DC sensitive residual current monitor Type A according to IEC 62020
r.m.s. value measurement (AC)
Two separately adjustable response values
Frequency range 42…2000 Hz
Start-up delay, response delay and delay on release
Restart function
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
Password protection for device setting
Device self monitoring
Sealable transparent cover
Two-module enclosure (36 mm)
RoHS compliant
Push-wire terminal (two terminals per connection)

Applicazioni

Residual current monitoring in earthed two, three or four conductor systems
Current monitoring of single conductors de-energised under normal conditions
Socket-outlet circuits for devices which are operated unattended for a long time and which may not fail
Alarm systems, safety devices
Air conditioning systems, EDP systems
Cooling equipment with valuable frozen goods
Canteen kitchens
Monitoring of earthed power supplies for stray currents
Impact on N conductors
Trace heating systems