1SVR730794R1300 ABB CM-PVS.31S Three-Phase Monitoring Relay 160–300 V AC

Why Choose the ABB CM-PVS.31S Three-Phase Monitoring Relay?

The ABB CM-PVS.31S 1SVR730794R1300 is a compact three-phase monitoring relay designed to supervise critical parameters in three-phase AC supplies. It monitors phase failure, phase sequence, overvoltage and undervoltage, helping industrial control systems detect abnormal mains conditions before they affect connected machinery or processes.

The CM-PVS.31S is powered directly by the measuring circuit and is designed for 3 × 160–300 V AC line-to-line systems. Adjustable absolute overvoltage and undervoltage thresholds allow the monitoring limits to be matched to the installation, while phase-sequence monitoring can be enabled or disabled according to application requirements.

The relay provides two changeover (SPDT) output contacts rated at 250 V / 4 A. A fixed 200 ms start-up delay and selectable instantaneous or 0.1–30 s tripping delay help accommodate transient conditions, while selectable ON- or OFF-delay operation, three status LEDs and screw terminals provide flexible integration into industrial control panels.

Key Advantages

• Combines phase failure, phase sequence, overvoltage and undervoltage monitoring in one relay.
• Designed for three-phase systems from 160–300 V AC line-to-line.
• TRMS measuring principle provides dependable voltage evaluation.
• Adjustable absolute overvoltage and undervoltage thresholds.
• Phase-sequence monitoring can be switched off when not required.
• Powered directly from the monitored three-phase circuit.
• 2 c/o (SPDT) output contacts provide flexible signalling and control.
• Selectable instantaneous or 0.1–30 s tripping delay.
• Selectable ON- or OFF-delayed tripping response.
• Compact 22.5 mm width conserves DIN-rail space.

Key Features

• ABB CM-PVS.31S three-phase monitoring relay.
• 3 × 160–300 V AC rated control supply and measuring voltage.
• 50/60 Hz supply frequency.
• Phase failure detection.
• Selectable phase-sequence monitoring.
• Adjustable overvoltage monitoring.
• Adjustable undervoltage monitoring.
• TRMS measuring principle.
• 200 ms start-up delay.
• Tripping delay selectable between 0 s and 0.1–30 s.
• Selectable ON- or OFF-delay tripping function.
• 2 changeover (SPDT) contacts.
• Output contacts rated at 250 V / 4 A.
• 3 LEDs for operating-state indication.
• Screw terminals with double-chamber cage connection technology.

Comprehensive Three-Phase Supply Monitoring

The ABB CM-PVS.31S continuously evaluates a 160–300 V AC three-phase supply for voltage and phase conditions. Adjustable overvoltage and undervoltage thresholds allow acceptable operating limits to be defined for the installation, while phase-failure detection and selectable phase-sequence supervision help identify supply faults that could disrupt or damage three-phase equipment.

The TRMS measuring principle supports reliable voltage evaluation, while the adjustable tripping delay allows short-duration disturbances to be tolerated when appropriate. With the option of ON- or OFF-delayed operation and two changeover contacts, the CM-PVS.31S can be integrated into alarm circuits, contactor control, machine interlocking and other protective control functions.

Typical Applications

• Three-phase mains voltage supervision.
• Phase failure detection.
• Phase-sequence monitoring.
• Overvoltage and undervoltage supervision.
• Three-phase motor and pump control systems.
• Compressors, fans and material handling machinery.
• Industrial automation and process equipment.
• Electrical control and distribution panels.