Carlo Gavazzi PPB02CM48 is a True RMS three-phase monitoring relay for phase loss, phase sequence and voltage asymmetry on 380–480 V AC industrial power systems.
£161.55
The Carlo Gavazzi PPB02CM48 is a compact and reliable True RMS three-phase monitoring relay designed to monitor industrial electrical supplies for phase loss, incorrect phase sequence and voltage asymmetry. As part of the Carlo Gavazzi PPB02 monitoring relay series, it provides dependable supervision of three-phase and three-phase plus neutral power systems in industrial automation, machinery and electrical control applications.
The relay is designed for 380–480 V AC three-phase supplies and operates at 50–60 Hz. It monitors the three measured phases for phase sequence, phase loss and voltage asymmetry, with selectable nominal voltages of 380 V, 400 V, 415 V and 480 V AC for three-phase delta systems, plus 220 V, 230 V, 240 V and 277 V AC phase-to-neutral systems.
The PPB02CM48 is supplied directly from the measured phases and uses a compact 36 mm wide plug-in housing for an 11-pin socket. It provides an SPDT relay output for integration with machine control and alarm circuits, while regenerated voltage detection and an adjustable asymmetry threshold help provide dependable monitoring of industrial power systems.
Three-phase monitoring relays continuously supervise electrical supplies and provide a control response when abnormal phase or voltage conditions are detected. This helps automation systems identify missing phases, incorrect phase sequence and excessive voltage imbalance before these conditions can adversely affect connected machinery.
The Carlo Gavazzi PPB02CM48 measures three-phase mains using True RMS measurement and can monitor both three-wire and four-wire systems. Its selectable nominal voltage settings, adjustable asymmetry threshold and configurable alarm delay provide a flexible monitoring solution for industrial control panels, motor systems and production machinery.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | PPB02 |
| Model | PPB02CM48 |
| Product type | True RMS 3-phase voltage monitoring relay |
| Monitoring functions | Phase loss, phase sequence and voltage asymmetry |
| Nominal line voltage range | 380–480 V AC |
| Supply voltage tolerance | ±15% |
| Supply operating range | 323–552 V AC L-L |
| Delta nominal voltages | 380 V, 400 V, 415 V and 480 V AC |
| Star nominal voltages | 220 V, 230 V, 240 V and 277 V AC |
| Input frequency | 50–60 Hz |
| Mains configuration | 3-phase or 3-phase + neutral |
| Power supply | Supplied by measured phases L1, L2 and L3 |
| Power consumption | <2.5 VA |
| Power-on delay | 1 s ± 0.5 s or 6 s ± 0.5 s |
| Alarm delay | 0.1–30 s |
| Output | 1 × SPDT relay |
| Mounting | Plug-in socket mounting |
| Housing width | 36 mm |
| Dimensions (H × W × D) | 80 × 36 × 94 mm |
| Protection rating | IP20 |
| Operating temperature | −20 to +60 °C |
| Storage temperature | −30 to +80 °C |
| Setting method through NFC | No |
| Approvals | Europe, North America and Australia |
| EAN | 8030956001037 |
The PPB02CM48 monitors three-phase electrical supplies for phase loss, incorrect phase sequence and voltage asymmetry.
The relay is designed for nominal three-phase line voltages from 380 V to 480 V AC, with an operating supply range of approximately 323 V to 552 V AC line-to-line.
For three-phase delta systems, the PPB02CM48 supports 380 V, 400 V, 415 V and 480 V AC. For three-phase plus neutral systems, selectable phase-to-neutral values include 220 V, 230 V, 240 V and 277 V AC.
Yes. The PPB02CM48 provides an adjustable voltage asymmetry threshold and an alarm delay from 0.1 s to 30 s, allowing the relay to be configured for the monitored electrical system.
The PPB02CM48 provides one SPDT relay output for connection to machine control, alarm and protection circuits.
Carlo Gavazzi PPB02 monitoring relays provide dependable three-phase mains supervision, helping automation engineers detect phase and voltage faults across industrial machinery, control panels and electrical installations.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...