Why Choose the ABB CM-PVS.41P Three-Phase Monitoring Relay?
The ABB CM-PVS.41P is a professional three-phase monitoring relay designed to supervise critical voltage and phase conditions in industrial three-phase electrical systems. Supplied under ABB order code 1SVR740794R3300, it monitors overvoltage, undervoltage, phase failure and phase sequence, helping protect motors, machinery and electrical equipment against unsuitable supply conditions.
The CM-PVS.41P operates directly from the monitored supply across a 3 × 300–500 V AC line-to-line measuring range. Its overvoltage and undervoltage threshold values are adjustable as absolute values, while phase-sequence monitoring can be switched off when it is not required. The relay uses a TRMS measuring principle for dependable voltage supervision.
A selectable ON- or OFF-delayed tripping function can operate instantaneously or with an adjustable 0.1–30 s delay. Two changeover (SPDT) output contacts rated at 250 V / 4 A, three status LEDs and maintenance-free Easy Connect push-in terminals provide straightforward integration into industrial control and protection circuits.
Key Advantages
- Monitors overvoltage, undervoltage, phase failure and phase sequence.
- Designed for 3 × 300–500 V AC three-phase systems.
- Adjustable overvoltage and undervoltage thresholds for application-specific monitoring.
- TRMS measuring principle provides dependable voltage measurement.
- Phase-sequence monitoring can be switched off when not required.
- Selectable ON- or OFF-delayed tripping.
- Selectable instantaneous operation or adjustable 0.1–30 s tripping delay.
- Powered directly by the measuring circuit, reducing additional wiring.
- Two changeover contacts provide flexible control and signalling.
- Maintenance-free Easy Connect push-in terminals simplify installation.
Key Features
- ABB CM-PVS three-phase monitoring relay series.
- ABB order code 1SVR740794R3300.
- Overvoltage monitoring.
- Undervoltage monitoring.
- Phase failure detection.
- Selectable phase-sequence monitoring.
- 300–500 V AC line-to-line measuring range.
- Adjustable absolute overvoltage and undervoltage thresholds.
- TRMS measuring principle.
- 200 ms start-up delay.
- 0 s or 0.1–30 s adjustable tripping delay.
- Selectable ON- or OFF-delay operation.
- 2 c/o (SPDT) output contacts.
- Output contacts rated at 250 V / 4 A.
- Three LEDs for indication of operational states.
- Easy Connect push-in terminal technology.
- Compact 22.5 mm DIN rail housing.
Reliable Three-Phase Voltage and Phase Monitoring
The ABB CM-PVS.41P continuously evaluates a three-phase supply for overvoltage, undervoltage, phase failure and phase-sequence faults. Its adjustable voltage thresholds allow the permitted operating window to be matched to the connected equipment, while the selectable phase-sequence function provides additional flexibility where rotational direction monitoring is required.
When a monitored condition moves outside the configured limits, the relay can switch its outputs immediately or after the selected 0.1–30 s delay. Selectable ON- and OFF-delay behaviour allows the response to be adapted to the application, making the CM-PVS.41P suitable for protecting motors, pumps, compressors, machinery and other equipment supplied from 300–500 V AC three-phase networks.
Typical Applications
- Three-phase motor protection circuits.
- Pumps, fans and ventilation systems.
- Compressors and refrigeration machinery.
- Conveyors and material handling equipment.
- Industrial machinery and production equipment.
- Motor control centres and electrical control panels.
- Three-phase supply voltage supervision.
- Phase-sequence and phase-failure monitoring.
- Applications requiring adjustable overvoltage and undervoltage protection.
