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LINETRAXX® MRCDB423

Modular residual current device type B for additional protection (protection against indirect contact) in earthed systems (TN and TT systems)

The AC/DC sensitive MRCDB423 with the corresponding CTUB101-CTBC… measuring current transformers are used as additional protection (protection against indirect contact) in earthed systems (TN and TT systems) in which AC or DC fault currents may occur. Part of these systems are particularly loads containing six-pulse rectifiers or one-way rectifiers with smoothing, such as converters, battery chargers, construction site equipment with frequency-controlled drives.

Since the values are measured with measuring current transformers, the MRCDB423 is almost independent of the nominal voltage and the operating current of the monitored system.

The residual operating current IΔn2, the response delay ton2 as well as the currently measured residual current IΔ are shown on the standard display.

By using an MRCDB423 with a suitable current transformer and a switching element with isolating properties, the device combination fulfils the requirements of IEC 60947-2 Annex M for an MRCD protective device.

The application is specifically intended for protection goals such as protection of persons, fire protection and plant protection. The switching element must not exceed a switch-off time of 17 ms.

MRCDB423
MRCDB423

Modular residual current device type B for additional protection (protection against indirect contact) in earthed systems (TN and TT systems)

The AC/DC sensitive MRCDB423 with the corresponding CTUB101-CTBC… measuring current transformers are used as additional protection (protection against indirect contact) in earthed systems (TN and TT systems) in which AC or DC fault currents may occur. Part of these systems are particularly loads containing six-pulse rectifiers or one-way rectifiers with smoothing, such as converters, battery chargers, construction site equipment with frequency-controlled drives.

Since the values are measured with measuring current transformers, the MRCDB423 is almost independent of the nominal voltage and the operating current of the monitored system.

The residual operating current IΔn2, the response delay ton2 as well as the currently measured residual current IΔ are shown on the standard display.

By using an MRCDB423 with a suitable current transformer and a switching element with isolating properties, the device combination fulfils the requirements of IEC 60947-2 Annex M for an MRCD protective device.

The application is specifically intended for protection goals such as protection of persons, fire protection and plant protection. The switching element must not exceed a switch-off time of 17 ms.

Kenmerken

  • AC/DC sensitive MRCD type B in accordance with IEC 60947-2 Annex M
  • Use as modular residual current protective device for additional protection in earthed systems
  • Operating characteristic type B in accordance with IEC 60755
  • RMS value measurement of the residual current
  • Alarm and prewarning indication via LEDs
  • Alarm and prewarning output via relays (K1/K2)
  • Control of a switching element with isolating properties via relay K2
  • Measuring current transformer connection monitoring
  • Fault memory

Toepassingen

  • Additional protection (protection against indirect contact) in earthed systems (TN and TT systems)

LINETRAXX® MRCDB423 Variant(en)

TypeResponse range IΔnRated frequencySupply voltage US*Art. No.
MRCDB423-D-130 mA…3 A0…2000 HzDC 9,6…94 V / AC 42…460 Hz, 16…72 VB94043055
MRCDB423-D-230 mA…3 A0…2000 HzDC 70…300 V / AC 42…460 Hz, 70…300 VB94043056

* Absolute values of the voltage range

Optionele accessoires voor LINETRAXX® MRCDB423

External measuring current transformers

TypeCT diameterShieldArt. No.
CTUB101-CTBC20ø 20–B78120010
CTUB101-CTBC20Pø 20✓B78120020
CTUB101-CTBC35ø 35–B78120012
CTUB101-CTBC35Pø 35✓B78120022
CTUB101-CTBC60ø 60–B78120014
CTUB101-CTBC60Pø 60✓B78120024
CTUB101-CTBC120ø 120–B78120016
CTUB101-CTBC120Pø 120✓B78120026
CTUB101-CTBC210ø 210–B78120018
CTUB101-CTBC210Pø 210✓B78120028

Connection cable measuring current transformer – MRCDB423

TypeLength/mArt. No.
CTX-1001B98110080
CTX-2502,5B98110081
CTX-5005B98110082
CTX-100010B98110083

Accessories

TypeArt. No.
Mounting clip for screw mounting (one piece per device)B98060008
Mounting frame XM420B990994 

Downloads voor LINETRAXX® MRCDB423

TypeNaamMaatTaalTijdstempelD-/B-Nummer
Conformiteitsverklaringen UKCA - MRCDB4xx 121.3 KB 2023/02/02 05:50:1002.02.2023 05:50:10
CE Conformiteitsverklaringen MRCDB4xx 86.3 KB 2022/08/12 06:17:2512.08.2022 06:17:25
Gegevensbladen MRCDB423 681.4 KB DE2021/08/02 12:00:0802.08.2021 12:00:08D00396
Gegevensbladen MRCDB423 678.1 KB EN2021/08/02 12:00:1702.08.2021 12:00:17D00396
Handboeken MRCDB423 2.6 MB DE2021/07/13 13:09:5413.07.2021 13:09:54D00396
Handboeken MRCDB423 2.5 MB EN2021/07/13 13:10:4313.07.2021 13:10:43D00396
Gegevensbladen MRCDB423 680.3 KB FR2021/08/02 11:49:1402.08.2021 11:49:14D00396
Flyers Modulares Fehlerstromgerät MRCD 96.6 KB DE2021/05/18 08:01:5218.05.2021 08:01:52
Flyers Modular Residual Current Device (MRCD) 96.3 KB EN2021/05/18 07:41:3318.05.2021 07:41:33
Flyers Dispositivo de Corriente Residual Modular MRCD 98.2 KB ES2021/05/18 08:03:1118.05.2021 08:03:11
Flyers Dispositivo differenziale separato a toroide esterno MRCD 115.1 KB IT2021/05/18 08:05:0218.05.2021 08:05:02
Technische informatie Changed variants of relays from goldplated to silver-plated contacts 166.3 KB EN2022/06/27 09:03:0827.06.2022 09:03:08
Technische informatie Geänderte Relaisvarianten von vergoldeten Kontakten auf versilberte Kontakte 166.3 KB DE2022/06/27 09:03:0827.06.2022 09:03:08