DRCM 1A pulsating AC/DC-sensitive type A
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Doepke The experts in residual current protection technology DATA SHEET DRCM 1A pulsating AC/DC-sensitive type A Article No. 09340250 ATV Function RCMs (residual current monitors) when used in combination with separate residual current transformers allow the monitoring of insulation between active conductors and the earth conductor. In contrast to modular residual current devices (MRCDs) or residual current circuitbreakers (RCCBs), they are used where the system either cannot or should not be switched o. In this way, these devices alone are used to monitor or report residual currents and are therefore suitable for preventative maintenance. They are not suitable for implementing protective measure "Automatic switch-o of power supply" as per DIN VDE 0100-410. Series DRCM residual current monitors Monitors with residual current characteristic A detect sinusoidal AC currents as well as pulsating DC residual currents. Devices in the standard design are intended for monitoring circuits with a rated voltage of 230 V or 400 V and a rated frequency of 50 Hz or 60 Hz. Features VDE-certied (DIN EN 62020), suitable for detecting type A residual currents, monitored frequency range 50#9660 Hz, rated residual operating current adjustable in ve levels (30, 100, 300, 1000 and 3000 mA), residual current transformers with internal diameters of 20, 30, 35, 70, 105, 140 and 210 mm available, rated currents up to 400 A, rated voltage of monitored circuit up to 690 V, xed response threshold of alarm between 75% and 100% of the set rated residual operating current (I∆n), adjustable pre-alarm threshold, alarm relays with two potential-free changeover contacts (230 V AC/5 A), selectivity adjustable in ten levels (0.1 s to 1 s in increments of 100 ms), dependent on auxiliary voltage, compact, robust plastic housing, easy mounting Mounting quick fastening to mounting rail, any installation position Applications The monitoring device is suitable for use in power supplied to purpose-built buildings and industrial facilities with TN-S, TN-C-S networks and IT networks, such as in server rooms for data centres, laboratories, in the automotive industry and in conjunction with air conditioning systems, printing machines and packaging machines, Not permitted for use in TN-C networks and direct current networks; not permitted for monitoring systems in which electronic equipment may cause DC residual currents or residual currents with frequencies not equal to 50 Hz. Notes RCMs are not suitable for basic protective measure "Automatic switch-o of power supply" as per DIN VDE 0100-410 (an RCM does not replace an RCD). Type A residual currents are detected separately by external residual current transformers from series DCT A, which are ordered separately. No more than one transformer can be operated on one evaluation unit. If residual currents with frequencies ≠ 50/60 Hz are expected (multiphase operated electronic equipment such as frequency converters), correct display and indication of a 50/60 Hz residual current cannot be guaranteed. For these applications we recommend our AC/DC sensitive residual current monitors from series DRCM type B+. Accessories DCT A-20, DCT A-30, DCT A-70, DCT A-105, DCT A-140, DCT A-210 Technical Data Series Error memory existent Selectivity adjustable Residual operating current characteristics Residual operating current I∆n (settings) Frequency range response residual current Type A Frequency range response residual current Type AC Adjustment values delay at IΔn ≥ 30 mA DRCM 1A DRCM 1A true true A 0.03 A, 0.1 A, 0.3 A, 1 A, 3 A 50 Hz ... 60 Hz 50 Hz ... 60 Hz 0.1 s, 0.2 s, 0.3 s, 0.4 s, 0.5 s, 0.6 s, 0.7 s, 0.8 s, 0.9 s, 1 s

Doepke The experts in residual current protection technology Technical Data Adjustment values delay at IΔn ≥ 100 mA Response threshold range of the pre-alarm Response threshold range of the main alarm Rated voltage Un of circuit monitored Rated frequency fn of circuit monitored Control elements Current transformer external Operating voltage (AC) Operating frequency Internal consumption Rated impulse withstand voltage Description Type nominal response residual current range Description Type Description Type Description Specification Rated voltage (AC) Rated current (AC) rated current (AC)...

The experts in residual current protection technology