Complete Voltage and Current Protection for Three-Phase Supplies
The Potric POVD 3-Phase Digital Voltage & Current Protector watches the voltage and current on each phase and disconnects your load when they leave the safe range. When the supply returns to normal, it reconnects automatically after an adjustable delay. This helps protect pumps, compressors, motors, air conditioners and electronics from voltage surges, voltage drops, phase faults and overloads.
The triple digital display shows live voltage and current for L1, L2 and L3 together, so you can read the condition of your supply at a glance.
Protection and Monitoring Functions
- Over-voltage protection: disconnects the load when voltage rises above the set limit.
- Under-voltage protection: disconnects the load when voltage falls below the set limit.
- Over-current protection: cuts power when load current exceeds the set value, with an adjustable action time.
- Three-phase voltage unbalance protection: trips when the difference between phases is too large.
- Phase sequence error indication: shows a warning and disconnects the output when the phases are connected in the wrong order.
- Continuous over-current lockout: after repeated over-current faults, the output stays off until manually reset.
- Current unbalance protection: optional protection against uneven phase currents.
- Power-on and recovery delays: protect compressors and motors from repeated start-ups.
Key Features
- 150A rating for main supply or heavy three-phase loads
- Triple display of voltage and current for all three phases
- Fully adjustable settings through the front-panel keys
- Voltage and current calibration of up to ±9.5%
- Fault indicator LEDs for over-voltage, under-voltage and over-current
- Hand switch and timer key on the front panel
- Automatic reconnection once the supply is stable
- DIN rail mounting with N, L1, L2, L3 input and output terminals
Typical Applications
- Three-phase motors, pumps and compressors
- Air conditioning and refrigeration systems
- Workshops, small factories and commercial buildings
- Distribution boards in areas with unstable mains supply
Important Note
This device protects against voltage and current abnormalities. It does not replace a circuit breaker or an RCD. Use it together with a suitable MCCB, MCB or RCBO for short-circuit and electric shock protection.
Frequently Asked Questions
What happens if the phases are connected in the wrong order?
The display shows a phase sequence error and the protector keeps the output disconnected until the wiring is corrected.
Will power return automatically after a fault?
Yes, for voltage faults. Power returns after the recovery delay once the supply is back within range. After continuous over-current faults, the output stays off until it is manually reset.
Can I change the protection limits?
Yes. Voltage limits, current limits, delays and calibration are all adjustable from the front panel.
Does it replace my circuit breaker?
No. Use it together with your breaker for complete protection.
Do I need an electrician to install it?
Yes. Installation must be carried out by a qualified electrician in line with local regulations.
About Potric
Potric supplies dependable electrical protection products designed for everyday safety and long service life.