Modular voltage control relay | 1-phase | 8A | 230VAC | DIN | Promfactor Baltic FRV11

Technical Data
Power Contacts: A1, A2
Power Supply Voltage (AC): 220 V
Nominal Frequency: 50/60 Hz
Operating Voltage Range (AC): 150–275 V
Overvoltage Threshold (U>): 225–275 V
Undervoltage Threshold (U<): 165–215 V
Voltage Measurement Accuracy: ≤1%
Trip Delay: 0.1–10 s
Trip Delay Accuracy: ±5% + 0.1 s
Hysteresis: ±3%
Output Contacts: 1 C/O (1 changeover contact)
Maximum Current (AC1): 8A
Maximum Current (AC15): 2A
Insulation Voltage: 250 V
Protection Rating: IP20
Pollution Degree: 3
Endurance (Electrical/Mechanical): 10⁵ / 10⁶ cycles
Wiring 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
Compliance with Standards: EN/IEC 60730-1; EN/IEC 60730-2-7
Application
This voltage monitoring relay is designed for use in:

Industrial and commercial sites where it is necessary to protect single-phase submersible pumps and other sensitive equipment from dry running, voltage surges, and drops.
Water supply systems, particularly for well, borehole, and reservoir pumps.
HVAC (Heating, Ventilation, and Air Conditioning) systems where maintaining stable voltage and protecting electric motors from unsuitable operating conditions is crucial.
Pros
Effective dry-run protection – automatically detects current drop and disconnects the device, preventing damage.
Precise voltage measurement – ≤1% error ensures reliable control.
Automatic reset – allows the device to restore operation without manual intervention.
LED indication – clear display of operational status.
Compact design – modular construction facilitates easy integration into electrical panels.
Easy installation – designed for standard DIN rail TN 35.

Cons
IP20 protection – unsuitable for use in open or humid environments without additional protection.
Single-phase system – not suitable for three-phase electrical networks, limiting its application to specific installations.

This device is a reliable solution for protecting submersible pumps and other equipment from undesirable voltage fluctuations and dry running, ensuring long-term and efficient operation.