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PF-PR400 IMO Voltage Monitoring 3-Phase 400VAC, 2 CO
PF-PR400 IMO Voltage Monitoring 3-Phase 400VAC, 2 CO
£58.34
Why Choose the IMO PF-PR400 Voltage Monitoring Relay?
The IMO PF-PR400 is a compact and reliable three-phase voltage monitoring relay designed to protect electrical systems by continuously monitoring phase conditions and detecting faults in industrial power networks. As part of the IMO range of industrial monitoring relays, it provides accurate voltage supervision for automation systems, motor protection and electrical control applications.
The PF-PR400 uses advanced True RMS measurement technology and microprocessor-based monitoring to provide reliable detection of phase loss, phase sequence errors and voltage imbalance conditions. Its compact 18 mm DIN rail mounting design allows easy installation inside control panels where space is limited.
Designed for three-phase 400 V AC systems, the IMO PF-PR400 operates across a wide voltage range of 85–300 V LN and 145–520 V LL. With a built-in relay output rated up to 5 A, it provides dependable switching for alarms, contactors and protective control circuits.
Key Advantages
- Compact three-phase voltage monitoring relay for industrial applications.
- True RMS measurement provides accurate voltage monitoring.
- Protects against phase loss, phase sequence and voltage asymmetry faults.
- 18 mm DIN rail mounting design saves control panel space.
- LED indicators provide clear relay and fault status information.
- Suitable for motor protection, automation systems and electrical control panels.
Key Features
- IMO PF series monitoring relay.
- Three-phase voltage monitoring.
- Rated voltage: 230 V LN / 400 V LL.
- Operating voltage: 85–300 V LN / 145–520 V LL.
- True RMS measurement technology.
- Phase loss protection.
- Phase sequence protection.
- Voltage asymmetry monitoring.
- 1 changeover relay output (1CO).
- Maximum switching capacity: 250 V AC / 30 V DC.
- LED indication for relay operation and faults.
Reliable Three-Phase Protection for Industrial Systems
The IMO PF-PR400 continuously monitors electrical supply conditions to help prevent damage caused by incorrect phase rotation, missing phases or voltage imbalance. This makes it an essential protection device for motors, pumps, compressors and sensitive industrial equipment.
By providing fast fault detection and dependable relay switching, the PF-PR400 helps improve system reliability, reduce downtime and protect valuable electrical components in automated environments.
Typical Applications
- Three-phase motor protection systems.
- Industrial automation control panels.
- Pumps and compressor protection.
- HVAC and refrigeration systems.
- Machine control and electrical cabinets.
- Power supply monitoring applications.
Technical Specifications
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| Mounting Type | DIN rail | |
|---|---|---|
| Monitored Supply | Three-phase | |
| Monitoring Function | Three-phase supply | |
| Voltage | 400 V | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Manufacturer | IMO Precision Controls | |
| Series | PF | |
| Model | PF-PR400 | |
| Product type | Three-phase voltage monitoring relay | |
| Rated voltage | 230 V LN / 400 V LL | |
| Operating voltage range | 85–300 V LN / 145–520 V LL | |
| Frequency | 50 / 60 Hz | |
| Measurement method | True RMS | |
| Output contact | 1CO relay | |
| Relay current rating | 5 A | |
| Maximum switching power | 1250 VA / 150 W | |
| Phase loss threshold | 60% of rated voltage | |
| Asymmetry threshold | ±25% | |
| Protection rating | IP20 | |
| Mounting type | 18 mm DIN rail mounting | |
| Operating temperature | -20°C to +60°C | |
| Power consumption | Less than 13 VA | |
| HS Code | 8536490099 | |
| Country of Manufacture | Türkiye |
Frequently Asked Questions
What is the IMO PF-PR400 used for?
The PF-PR400 is a three-phase voltage monitoring relay used to detect electrical faults such as phase loss, phase sequence errors and voltage imbalance.
What voltage systems can the PF-PR400 monitor?
The relay monitors three-phase systems rated at 230 V line-to-neutral and 400 V line-to-line.
What protection functions are included?
The PF-PR400 provides protection against phase loss, incorrect phase sequence and voltage asymmetry.
How is the PF-PR400 installed?
The relay is designed for compact 18 mm DIN rail mounting inside electrical control panels.
What type of output does this monitoring relay provide?
The PF-PR400 includes a 1CO relay output rated up to 5 A for switching control circuits.
Trusted for Industrial Electrical Protection
IMO monitoring relays provide reliable protection and supervision for industrial automation systems, helping engineers maintain safe and efficient electrical operation.
