The ABB 1SFB527068D708 (type designation CM-PVE) is a dedicated electronic monitoring relay from the CM range, designed to supervise three-phase mains for phase failure and overvoltage. This compact device ensures the protection of motors and systems by detecting critical power supply faults and disconnecting the load before damage occurs.

 

Technical Specifications

Feature	Details
Brand	ABB
Model Number	1SFB527068D708
Type Designation	CM-PVE
Monitoring Function	Phase Failure and Overvoltage
Rated Control Supply Voltage	L1-L2-L3: 320–460V AC
Output Contacts	1 n/c contact (closed-circuit principle)
Terminal Type	Screw Terminals
Weight	0.066 kg

Key Characteristics

• Single-Function Monitoring: Specifically optimized for phase failure detection and overvoltage protection, providing a cost-effective solution for standard industrial power monitoring.
• Closed-Circuit Principle: The output relay is energized when the voltage is within the healthy range and de-energizes (trips) immediately if a fault is detected or if the control supply fails.
• Powered by the Measuring Circuit: The device draws its operating power directly from the three-phase sensing lines, eliminating the need for a separate auxiliary power supply.
• Compact Housing: Features a slim 22.5 mm width, allowing for high-density installation on DIN rails within control panels.
• Clear Status Indication: Equipped with a front-facing LED to provide immediate visual feedback regarding the operational status of the relay.

 

Application Areas

The CM-PVE relay is widely utilized to protect three-phase equipment in various industrial and commercial sectors:

• Motor Protection: Preventing motors from running on two phases (single-phasing), which can lead to overheating and winding failure.
• HVAC Systems: Protecting compressors and large fans from voltage fluctuations and phase loss.
• Pumping Stations: Ensuring reliable operation of submersible and surface pumps in water treatment.
• Machine Tools: Safeguarding sensitive industrial machinery from unstable power grid conditions.

 

Product Parameters

• Overvoltage Threshold: Fixed at 460V AC.
• Phase Failure Detection: Reliable detection even with regenerated voltage from motors.
• Mounting: Standard 35mm DIN rail (IEC/EN 60715).
• Degree of Protection: IP50 (Housing) / IP20 (Terminals).
• Ambient Temperature: -20°C to +60°C.
• Standards: IEC/EN 60255-6, EN 50178.