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modular residual current devices DMRCD 1 A

09340350, modular residual current device Type A, 85 V - 264 V AC
  • Type A, 230 V (AC)
  • monitored circuit max. 690 V
  • alarm message via relay

modular residual current devices DMRCD 1 A

09340350, modular residual current device Type A, 85 V - 264 V AC
  • Type A, 230 V (AC)
  • monitored circuit max. 690 V
  • alarm message via relay

Details

modular residual current device Type A, 85 V - 264 V AC

MRCDs detect and evaluate residual currents in terms of its level and duration. If the limit value is exceeded, they trigger the disconnection of the affected system part via an external switch-off device. Modular residual current devices (MRCD) are used to protect against residual currents, if residual current circuit-breakers cannot be used due to the high load currents or mains voltages. Modular residual current circuit-breakers of series DMRCD has a number of usable total current transformers and therefore also a number of conductor cross-sections or rated currents. The bar display provides a view of the current residual current. The alarm is triggered at a fixed response threshold. The current level of the residual current, and the point where the response thresholds are exceeded can be seen on a 10-way LED display on the front of the device housing. A faulty connection to the external residual current transformer is immediately indicated by the alarm LED through a flashing pattern and by the activation of the signal contacts. The adjustable response delay in the range from 0.1 s to 1 s (in increments of 100 ms) makes it possible to prevent a response to brief residual current impulses, e.g. lightning strikes and switching overvoltage. This approach allows for selectivity of devices switched in series, simplifying the localisation of faults. Two independent, potential-free changeover contacts provide the option of passing on the alarm to optional indicator panels, indicator lights, acoustic signalling devices, touch panels, PLCs, etc. Modular protective devices with residual current characteristic A detect sinusoidal AC currents as well as pulsating DC residual currents. This variant is suitable for monitoring circuits with frequencies from 50 Hz to 60 Hz. They differ in adjustment ranges of the response residual current: the DMRCD 1 A allows adjustment of values .

suitable for detecting Type A residual currents, monitored frequency range 50 Hz to 60 Hz, Residual response current can be adjusted at five levels, Selectivity adjustable at ten levels, large selection of different residual current transformers available, Rated voltage of monitored circuit up to 690 V, with alarm relay, adjustable pre-alarm threshold of 10% to 90% of the alarm's response threshold, The set value for the pre-alarm threshold is displayed as a continuously lit LED on the bar display, potential-free changeover contacts for pre-alarm and main alarm, compact, robust plastic housing, easy mounting, according to EN 60947-2 Annex M, VDE 0100-410, IEC 670364-4-41, VDE 0100-530, EN 60664

quick fastening to mounting rail, any installation position

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 the rated frequency of the RCCB.

Residual currents are detected separately by external residual current transformers from series DCT, which are ordered separately. No more than one transformer can be operated on one evaluation unit. The maximum cable length from the control relay to the transformer is 10 m. To meet DIN VDE 0100-410, the electrical system must be isolated from the mains by an external isolating device with a response time of less than 15 ms.

modular residual current device Type A, 85 V - 264 V AC

MRCDs detect and evaluate residual currents in terms of its level and duration. If the limit value is exceeded, they trigger the disconnection of the affected system part via an external switch-off device. Modular residual current devices (MRCD) are used to protect against residual currents, if residual current circuit-breakers cannot be used due to the high load currents or mains voltages. Modular residual current circuit-breakers of series DMRCD has a number of usable total current transformers and therefore also a number of conductor cross-sections or rated currents. The bar display provides a view of the current residual current. The alarm is triggered at a fixed response threshold. The current level of the residual current, and the point where the response thresholds are exceeded can be seen on a 10-way LED display on the front of the device housing. A faulty connection to the external residual current transformer is immediately indicated by the alarm LED through a flashing pattern and by the activation of the signal contacts. The adjustable response delay in the range from 0.1 s to 1 s (in increments of 100 ms) makes it possible to prevent a response to brief residual current impulses, e.g. lightning strikes and switching overvoltage. This approach allows for selectivity of devices switched in series, simplifying the localisation of faults. Two independent, potential-free changeover contacts provide the option of passing on the alarm to optional indicator panels, indicator lights, acoustic signalling devices, touch panels, PLCs, etc. Modular protective devices with residual current characteristic A detect sinusoidal AC currents as well as pulsating DC residual currents. This variant is suitable for monitoring circuits with frequencies from 50 Hz to 60 Hz. They differ in adjustment ranges of the response residual current: the DMRCD 1 A allows adjustment of values .

suitable for detecting Type A residual currents, monitored frequency range 50 Hz to 60 Hz, Residual response current can be adjusted at five levels, Selectivity adjustable at ten levels, large selection of different residual current transformers available, Rated voltage of monitored circuit up to 690 V, with alarm relay, adjustable pre-alarm threshold of 10% to 90% of the alarm's response threshold, The set value for the pre-alarm threshold is displayed as a continuously lit LED on the bar display, potential-free changeover contacts for pre-alarm and main alarm, compact, robust plastic housing, easy mounting, according to EN 60947-2 Annex M, VDE 0100-410, IEC 670364-4-41, VDE 0100-530, EN 60664

quick fastening to mounting rail, any installation position

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 the rated frequency of the RCCB.

Residual currents are detected separately by external residual current transformers from series DCT, which are ordered separately. No more than one transformer can be operated on one evaluation unit. The maximum cable length from the control relay to the transformer is 10 m. To meet DIN VDE 0100-410, the electrical system must be isolated from the mains by an external isolating device with a response time of less than 15 ms.