Modular | Digital Voltage Control Relay | 3F | 8A | 200-500VAC | DIN | Promfactor Baltic FRV15 4

Technical Data
Number of Phases: L1, L2, L3
Supply Voltage: 200~500V AC
Nominal Frequency: 50 Hz
Overvoltage Limits: OFF-381~500 V
Undervoltage Limits: 260~379 V OFF
Asymmetry Adjustment: OFF-5%-20%
Overvoltage Trip Delay: 0.1~20 s
Undervoltage Trip Delay: 0.1~20 s
Asymmetry Trip Delay: 0.1~20 s
Power-On Delay: 0.1~30 s
Reset Delay: 0.1~30 s
Hysteresis Voltage: 5 V
Asymmetry Hysteresis: 2%
Phase Loss Trip Delay: ≤0.2 s
Output Contacts: NO+NC
Contact Current (AC1): 8A / 250V
Insulation Voltage: 415 V
Protection Degree: IP20
Pollution Level: 3
Durability (Electrical/Mechanical): 10⁵ / 10⁶ cycles
Wire Cross-Section: 0.5 ... 2.5 mm²
Screw Tightening Torque: 0.5 Nm
Mounting: DIN Rail TN 35
Operating Temperature: -5...+40°C
Storage Temperature: -10...+50°C
Application
The FRV15 4 relay is used in various industrial and commercial environments where stable three-phase voltage supply must be ensured and electric motors need protection from power network disturbances. It is suitable for:

Manufacturing plants (protecting equipment and conveyor systems)
Pumping stations and ventilation systems
HVAC equipment (heating, ventilation, and air conditioning)
Electrical distribution and control cabinets
Pros
Wide voltage range – suitable for different power networks (200–500V)
LCD display – clear visualization of measurement parameters
Microcontroller-based protection – higher accuracy and reliability
Adjustable settings – customizable according to specific needs
DIN rail mounting – easy installation in electrical panels
Multifunctional protection – safeguards against overvoltage, undervoltage, phase loss, and asymmetry

Cons
IP20 protection class – not suitable for dusty or humid environments without additional protection
Requires a qualified installer – improper configuration may result in ineffective operation
No Wi-Fi or remote monitoring function

This relay is a reliable solution for industrial and commercial electrical networks, ensuring motor protection from common power supply issues.