What is an MRCD? The principle of modular residual current protection
The guide illustrates this model's “AC/DC-sensitive MRCD evaluation” function with a product example.
Read the technical guideProduct families / Residual current monitoring / LINETRAXX® SmartDetect MRCDB425
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BENDER DISTRIBUTOR IN TÜRKİYE · ADEO TEKNİK
Bender LINETRAXX® SmartDetect MRCDB425Type B MRCD Module
AC/DC-sensitive modular residual current device (MRCD) for TN and TT circuits, with a TFT or LED display. Protection requires a compatible measuring current transformer and an external circuit breaker with the trip release specified by the manufacturer.
TECHNICAL SUMMARY
Features of this model.
Modular residual current protection · MRCD
- Type B / B+ characteristic; measurement of DC and 15 Hz…20 kHz.
- Adjustable main alarm threshold 30 mA…3 A; prewarning 10…100% of the main threshold.
- MRCDB425-D: TFT display; MRCDB425-L: LED bar indicator.
- Modbus RTU, NFC / Bender Connect and K1/K2 alarm relays.
FROM PRODUCT TO TECHNICAL KNOWLEDGE
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Explore the product's function and its system's operating principle through technical explanations.
RCM versus RCD: How does residual current monitoring work?
The guide illustrates this model's “MRCD: protection chain with a compatible circuit breaker” function with a product example.
Read the technical guideHow do you choose Type A or Type B residual current monitoring?
The guide illustrates this model's “MRCD · Modular protection” function with a product example.
Read the technical guideADEO Teknik · Bender distributor in Türkiye
Ask ADEO Teknik Technical product information and supply support for model selection, compatible components and current manufacturer documentation.
MODEL, ORDER AND ACCESSORY INFORMATION
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16 / 16 options
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Model options and technical values
| Model | Supply voltage U S | Order code |
|---|---|---|
| MRCDB425-D-2 | DC 24 V; AC/DC 100…240 V | B84606030 |
| MRCDB425-L-2 | DC 24 V; AC/DC 100…240 V | B84605030 |
Explore compatible accessories
Compatible accessories · 1
| Model | Order code |
|---|---|
| Sealable transparent cover (spare part) | B80609299 |
Manufacturer table notes (original language):
External power supply
Compatible accessories · 2
| Model | Rated input voltage U IN | Rated voltage | Order code |
|---|---|---|---|
| STEP-PS/1 AC/24 DC/0.5 | AC 85…264 V, 45…65 Hz; DC 95…250 V | DC 24 V | B94053110 |
| STEP-PS/1 AC/24 DC/1.75 | AC 85…264 V, 45…65 Hz; DC 95…250 V | DC 24 V | B94053111 |
| STEP-PS/1 AC/24 DC/4.2 | AC 85…264 V, 45…65 Hz; DC 95…250 V | DC 24 V | B94053112 |
Manufacturer table notes (original language):
External measuring current transformers
Compatible accessories · 3
| Model | Shielding | Internal diameter (mm) | Order code |
|---|---|---|---|
| CTUB102-CTBC20 | - | ø 20 | B78120011 |
| CTUB102-CTBC20P | x | ø 20 | B78120021 |
| CTUB102-CTBC35 | - | ø 35 | B78120013 |
| CTUB102-CTBC35P | x | ø 35 | B78120023 |
| CTUB102-CTBC60 | - | ø 60 | B78120015 |
| CTUB102-CTBC60P | x | ø 60 | B78120025 |
| CTUB102-CTBC120 | - | ø 120 | B78120017 |
| CTUB102-CTBC120P | x | ø 120 | B78120027 |
| CTUB102-CTBC210 | - | ø 210 | B78120019 |
| CTUB102-CTBC210P | x | ø 210 | B78120029 |
Based on tables on the manufacturer's current product page. For marked-value footnotes, connection conditions and variant suitability, review Bender product source ↗ and the technical documents together. Listing an order code does not commit to stock availability or delivery time.
BENDER MANUFACTURER DOCUMENTS
Access technical documentation in one place.
Find product and accessory documents by type or file name. Language and file information appear beside each document.
7 / 7 documents
Datasheet
MRCDB425-D
MRCDB425-D_D00495_D_XXEN.pdfTechnical summary source · pp. 1, 2, 3Open document ↗DatasheetMRCDB425-L
MRCDB425-L_D00497_D_XXEN.pdfTechnical summary source · pp. 1, 2, 3Open document ↗Operating manualMRCDB425-D
MRCDB425-D_D00495_M_XXEN.pdfOpen document ↗Operating manualMRCDB425-L
MRCDB425-L_D00497_M_XXEN.pdfOpen document ↗Conformity documentMRCDB4xx
CEKO_MRCDB4xx.pdfOpen document ↗Conformity documentUKCA - MRCDB4xx
UKCA_MRCDB4xx.pdfOpen document ↗BrochureModular Residual Current Devices (MRCD)
MRCD_Fly_en.pdfOpen document ↗No documents match your search. Change the search or document type.
About manufacturer sources
This summary is based on the product descriptions, features and variant information on the specified document pages. Consult the manufacturer document for complete technical values, connection information and ordering options.
Current product and variant information · Bender ↗
Data sheets, operating manuals and related manufacturer documents. File names identify the model or accessory; documents retain their original language.
ADEO Teknik · Bender's distributor in Türkiye. Current Bender product source ↗
APPLICATIONS
Its role in your application.
Measures residual currents in loads containing converters and DC components. Provides prewarning and main alarm in a combination with a suitable measuring current transformer and circuit-breaker trip arrangement.
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