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The latest edition is available for download at: Monitor_Edition-2010-1_en.pdf
According to DIN V VDE V 0126-1-1, the voltage and frequency shall be monitored when feeding power into the public low voltage grid from decentralised power generation systems >30 kW (such as CHPs, wind, hydrodynamic and photovoltaic power plants). The three-phase voltage monitors of the VMD422 series continuously monitor the voltage and frequency at the transfer connection point in 3AC/3NAC systems and activate an alarm relay within 180 ms (response values according to VDEW guideline “Generator at the public low-voltage grid”) if voltage and frequency exceed upper and lower limits.
Datasheet >>>According to DIN V VDE V 0126-1-1, the voltage and frequency shall be monitored when feeding power into the public low voltage grid from private electricity generation systems > 30 kW (such as CHPs, wind power stations, hydroelectric power plants and photovoltaic systems).
The three-phase VMD423 series voltage and frequency monitors monitor the voltage and frequency at the feeding point of the public grid. At the feeding point of the medium voltage grid, the output voltages and frequencies are measured by means of voltage transformers (100 V). An alarm relay is activated within ≤ 80 ms when limit values are reached (response values according to VDEW guideline “Private electricity generation systems at the medium voltage grid”).
Datasheet >>>The AC / DC sensitive residual current monitor RCMA423 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 also be monitored by RCMA423.
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