Three-phase voltage control relay | 12V control | overvoltage / undervoltage protection | mini | sealed | high-power contacts
Code: ES-RD-MV12VThree-phase voltage monitoring relay is a reliable solution for protecting the electrical network from voltage fluctuations, phase imbalance, or critical faults. This compact yet powerful device ensures stable and safe operation of electrical equipment in both industrial environments and smaller installations. Thanks to its miniature size, sealed construction, and high-power contacts, the relay is suitable for installation in electrical panels where reliability and space saving are essential.
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Technical specifications
Product type: three-phase voltage monitoring relay
Relay type: voltage relay
Purpose: protective
Monitoring: three-phase (3 phases)
Rated voltage: 12V
Contact load: high power
Construction: sealed (protection against dust and moisture)
Size: miniature (compact)
Color: whiteFunctions
Overvoltage protection – automatically disconnects equipment when the voltage exceeds the set limit
Undervoltage protection – protects devices from operating at too low voltage
Three-phase system monitoring – continuously checks all three phases simultaneously
Voltage imbalance control – detects irregularities between phases and protects equipment
High-power contacts – allow reliable control of higher loads
Sealed construction – protects against dust and moisture, ensures durability
Miniature design – easily fits even in small electrical enclosures
Easy integration – easily installed into electrical panels and control systemsApplications
For household users: Protecting home electrical equipment (e.g., pumps, compressors), use in small workshops or farms, ensuring stable voltage supply for sensitive equipment
In industry / for engineers: In electrical network protection solutions, protection of production lines and motors, automation systems where stability is critical
For electricians: Assembly of electrical panels, protection of three-phase motors and equipment, quick and reliable solution for clients
Other applications: Pumping stations, ventilation systems, generator units, agricultural equipmentAdvantages
Three-phase protection in one device
Compact size – easy installation
Sealed construction (durability)
High-power contacts
Reliable protection against voltage fluctuationsDisadvantages
No digital display or indication
Requires precise selection according to network parametersIllustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.
CE certification means that the product has been evaluated according to the main criteria:
Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purposeCE marking allows this product to:
be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environmentsThe CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.
What does this mean for you as a buyer?
Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions
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Price 87.95 € VAT incl.( 72.69 € VAT excl. )













