The current transformers STWA3D for use with residual current monitor RCM1000V are available with 4 different inside diameters. STWA3D20-70 can be snapped on a DIN-rail, vertically or horizontally or be fixed with screws. The Bracket for mounting is included. STWA3D125 can only be mounted with screws.
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Residual Current Monitor RCM1000V
RCM1000V RCM100V monitors residual currents in grounded power supply systems. Used as a current relay it monitors AC- or pulsing DCcurrents for exceeding upper or lower limits. Insulation faults can be caused by damages (mechanical, thermic or chemical) of insulations or also by humidity or pollution. At currents > app. 250 mA (at 230 V) at a location, the fault can lead to danger of fire.Applied as current relays RCM1000V can among others monitor current in the neutral conductor. Nonlinear loads, e.g. switching power supplies in PC, printers or lights with EGC, cause harmonics in the neutral conductor: Even when the load is symmetric, the harmonics can lead to an overload in the neutral conductor. RCM1000V detect and report this overload.Residual current monitors detect these faults in widely branched power supply systems and make a signal before additional damage develops. By displaying the residual current also stealthy changes can easily be detected and localized by switching on and off parts of the power supply system.Particularly useful in monitoring in systems in which no fault current circuit breaker can or shall be used, because an immediate switching would have wideranging consequences, such as breakdown of computersystems or interruption of processes of sensitive goods. RCM1000V do NOT replace fault current circuit breakers for protection from electric shock but they can complement it by detection an fault in the insulation before the systems has to be shut off.Monitoring of residual currents2 limits for alarm and tripMonitoring of current, 2 x under- or overcurrent or windowsMeasuring range 0,003 … 9,999 ASetting range 0,010...9,999 ADisplay can be scaledTest-button and automatic test every 24 hoursInput for current transformer STWA3D with monitoring of transformerStart-up delay to suppress alarms when switching on4 digits bright LED-display for measured values and programmingLEDs for alarms, state of relays and unitsLimit, hysteresis, switching delay and switch off delay individually programmableFunction of relays (nc-, or no-mode) and interlocked switching or autoreset programmableUniversal supply voltage AC/DC 24-240 VHousing for DIN-rail mount, 70 mm wide, mounting height 55 mmAccessory: Front mounting kit type ER4