The RCM420 monitors for ground-fault current in solidly-grounded and high-resistance-grounded AC (single-phase or three-phase) systems. The pickup value is adjustable from 10 mA to 10 A. A separately configurable prewarning alarm is also available.

The GM420 series loop monitor is designed to monitor the resistance of PE conductor connections in AC systems and in de-energised systems. The extraneous voltage Uf between the terminals E and KE must not exceed AC 12 V. The ohmic resistance of the conductor loop and the AC extraneous voltage Uf, if existing, will be indicated on the display.

The RCMA420 monitors for ground-fault current in solidly-grounded and high-resistance-grounded AC/DC (single-phase or three-phase) systems. The RCMA420 is also compatible with systems that contain power conversion equipment, such as variable frequency drives and inverters.

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 …

“Safety instructions for Bender products”. Read the manual before installing, connecting and commissioning the device. Always keep the manual within easy reach for future reference.

The multi-functional VMD420 series voltage relay is designed to monitor the frequency, undervoltage and overvoltage and the voltage between two threshold values in 3 (N)AC systems. The voltages are measured as r.m.s. values. The currently measured value is continuously shown on the LC display.

View and Download Bender Rcm420 operating manual online. residual current monitor for ac current monitoring in tn and tt systems. rcm420 monitor pdf manual download.

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.

The VME420 series voltage relays are designed to monitor the frequency, undervoltage, overvoltage and the voltage between two threshold values in AC and DC systems. The voltages are measured as r.m.s. values. The currently measured value is continuously shown on the LC display. The measured value required to trigger the alarm relay is stored.

reme climatic and mechanical environmental conditions prevail. The XM420-DW se-ries is . haracterised by its robustness under harsh ambient conditions. In particular, it is extremely weather re. istant, interference resistant as well as vibration resistant. The measuring and monitoring relays of this series are designed as s.