Modular | digital voltage monitoring relay for solar power | photovoltaic systems | 3-phase | 16A | 170-270V | DIN | VP-3F10Af DigiTOP

Technical Specifications:

Network type: 3‑phase / 3 single‑phase
Nominal current: 3 × 10 A
Maximum current: 3 × 16 A
Operating voltage: 50–400 V AC
Frequency: 50 Hz
Upper disconnect voltage: 170–270 V (step 1 V)
Hysteresis (voltage drop threshold): 1–50 V (step 1 V)
Switch‑on delay: 0–90 s (step 1 s)
Disconnect time after threshold exceedance: 0.02 s
Contact type: 3 changeover contacts (NO + NC)
Mounting: 3‑module width, DIN rail

Main functions:

Protects equipment from over‑voltage on the line

Selectable operation mode: single‑phase or three‑phase

Programmable values: disconnect threshold, hysteresis, switch‑on delay

Ultra‑fast response – only 0.02 s

Can switch off/on an auxiliary load in case of over‑voltage

Independent control of three phases enables precise energy distribution

Easy DIN‑rail installation

Applications:

Photovoltaic systems – protection against grid over‑voltage

Residential and commercial solar‑powered installations

Industrial sites requiring voltage stability

Energy‑consumption control – can automatically engage an auxiliary consumer in over‑voltage conditions

Backup systems – to disconnect sensitive equipment under critical conditions

Pros:

Universal operating mode – three‑phase or three single‑phase devices

Programmable control – adaptable to different projects

Instant reaction – protection activates within 20 ms

Easy to install and configure

Helps to avoid equipment malfunction and electrical losses

Suitable for both homeowners and professional engineers

Cons:

Cannot serve as under‑voltage protection

Requires technical understanding for programming

DigiTOP VP‑3F10Af – a reliable and flexible voltage‑control solution for photovoltaic systems. It guarantees the safety of operating equipment and enables intelligent energy‑flow management. Thanks to its technical capabilities and programmability, the relay is ideal for both professional installers and advanced homeowners who value safety and efficiency in their solar energy systems.