Selecting protection and monitoring relays
Move from monitoring duties such as voltage, load current and PE loop to the appropriate relay group.
Read the technical guideProduct families / Measuring and monitoring relays / LINETRAXX® VMD421H
Official Bender product image
BENDER DISTRIBUTOR IN TÜRKİYE · ADEO TEKNİK
Bender LINETRAXX® VMD421HThree-Phase Voltage Monitoring Relay
Relay monitoring voltage, frequency, phase sequence and asymmetry in three-phase systems, powered from the monitored circuit.
TECHNICAL SUMMARY
Features of this model.
Voltage, frequency and phase monitoring
- Range of 70…500/288 V for 3(N)AC systems.
- Undervoltage/overvoltage and frequency; phase failure, phase sequence and asymmetry monitoring.
- No external auxiliary supply required; internal energy backup.
- LC display, Preset, two separate changeover alarm contacts and 36 mm enclosure.
FROM PRODUCT TO TECHNICAL KNOWLEDGE
All technical guides ↗Related technical guides
Explore the product's function and its system's operating principle through technical explanations.
ADEO 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
Compare all options in the series.
Assess the option for your application using model names, order codes and technical values. Accessories appear in separate tables.
3 / 3 options
No options match your search. Change the model name or order code.
Model options and technical values
| Model | Nominal system voltage U n * | Alarm threshold | Order code** |
|---|---|---|---|
| VMD421H-D-3 | 3(N)AC 70…500 V, 15…460 Hz | AC 70…500 V | B73010007 / B93010007 |
Manufacturer table notes (original language):
* absolute values **(B7… = push-wire terminal / B9… = screw-type terminal)
Explore compatible accessories
Compatible accessories · 1
| Model | Order code |
|---|---|
| Mounting clip for screw mounting (one piece per device) | B98060008 |
| Mounting frame XM420 | B990994 |
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.
4 / 4 documents
Datasheet
VMD421H
VMD421H_D00138_D_XXEN.pdfTechnical summary source · pp. 1, 2Open document ↗Operating manualVMD421H
VMD421H_D00138_M_XXEN.pdfOpen document ↗Conformity documentVMx42x
CEKO_VMx42x.pdfOpen document ↗Conformity documentUKCA - VMx42x
UKCA_VMx42x.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.
Used in voltage-sensitive machines, three-phase motors and redundant supply arrangements. Internal energy backup and adjustable delays allow alarm behaviour to be matched to brief voltage variations in the application.
RELATED MODELS
