Doepke 09340250 DOEP DRCM DRCM 1A 1A 1A DRCM

RCM ('Residual Current Monitors') in combination with separate residual current transformers enable monitoring of the insulation between active conductors and earth. In contrast to modular residual current devices (MRCD) or residual current circuit breakers (RCCB), they are used where switching off the system is not possible or not desired. They are therefore only used to monitor or report residual currents and are therefore suitable for preventive maintenance. They are not suitable for implementing the protective measure 'protection by automatic shutdown of the power supply' in accordance with DIN VDE 0100-410. Residual current monitors of the DRCM series are characterized by a large number of usable total current transformers - and thus also conductor cross-sections or rated currents. The bar display shows the current residual current. The alarm is reported when a defined response threshold is reached. The level of the current residual current and the exceedance of the response thresholds can be read on a 10-fold LED display on the front of the device. A faulty connection to the external residual current transformer is immediately indicated by a flashing code of the alarm LED and activation of the signaling contacts. The adjustable response delay in the range of 0.1 s to 1 s (in steps of 100 ms) makes it possible to avoid a response to short-term residual current pulses, e.g. as a result of lightning strikes and switching overvoltages. This also makes it possible to achieve selectivity of devices connected in series, which makes fault localization easier. Two independent, potential-free changeover contacts offer the option of forwarding the alarm to optional signaling panels, signaling lights, acoustic signaling devices, touch panels, PLCs, etc. Monitors with the residual current characteristic A detect sinusoidal alternating and pulsating direct residual currents. Standard devices are designed for monitoring circuits with a rated voltage of 230 V or 400 V and a rated frequency of 50 Hz. Properties: - VDE-certified (DIN EN 62020), - suitable for detecting residual currents of the residual current characteristic type A, - monitored frequency range 50 - 60 Hz, - nominal response residual current adjustable in five stages (30, 100, 300, 1000 and 3000 mA), - residual current transformers with inner diameters of 20, 30, 35, 70, 105, 140 and 210 mm available, - rated voltage of the monitored circuit up to 690 V, - fixed response threshold of the alarm between 75 % and 100 % of the set nominal response residual current (I?n), - adjustable pre-alarm threshold, - alarm relay with two potential-free changeover contacts (230 V AC / 5 A), - selectivity adjustable in ten stages (0.1 s to 1 s in steps of 100 ms), - auxiliary voltage dependent, - compact,Robust plastic housing, - easy installation, Installation type: - quick fastening on mounting rail, - installation position as desired, Areas of application: - The monitoring device is suitable for use in power supplies of functional buildings and industrial plants with TN-S, TN-CS networks and IT networks, e.g. in server rooms of data centers, in laboratories, in the automotive industry and in connection with air conditioning systems, printing machines and packaging machines., - Use in TN-C networks and direct current networks as well as the monitoring of systems in which electronic equipment can cause smooth direct residual currents or residual currents with frequencies other than the rated frequency of the RCCB is excluded., Notes: RCMs are not suitable for the basic protection measure 'protection by automatic shutdown of the power supply' in accordance with DIN VDE 0100-410 (an RCM does not replace an RCD). The residual currents are recorded separately by separately available external residual current devices.
Type: DRCM 1A