3-phase sequence relay monitoring 208-440VAC

ABB's CM-PFE is a three-phase monitoring relay that monitors the phase parameter phase sequence and phase failure in three-phase mains.

How it works: If all phases are present with the correct phase sequence, the output relay energises after the fixed start-up delay is complete. If a phase failure or a phase sequence error occurs, the fixed tripping delay starts. When timing is complete, the output relay de-energises. The LED R glows when the output relay is energised. In case of motors which continue running with only two phases, the CM-PFE detects phse failure if the reverse fed voltage is less than 60 per cent of the originally applied voltage.

FEATURES

• Powered by measuring circuit
• One closed circuit principle
• One LED to indicate operational states

SPECIFICATIONS

Type: Three-phase monitoring relay

Function: Phase failure detection neutral monitoring

Contact configuration: 1CO SPDT

Mounting type: 35 x 15mm DIN rail, 35 x 7.5mm DIN rail

Terminal type: Screw

Phase: 3

Current rating: 4 amps

Frequency rating: 50/60Hz

Voltage rating: 200 to 500 VAC

Width: 22.5mm

Length: 78mm

Height: 78mm

Measuring range: L1-L2-L3 + 208-400VAC

Weight: 0.068kg

Protection rating: IP20, IP50

Units: Each