Siemens 3UG5642-1CW30 Digital Monitoring Relay for Cos Phi, Current, Voltage

The Siemens 3UG5642-1CW30 is a versatile digital monitoring relay designed for comprehensive electrical parameter supervision in industrial applications. It monitors current, voltage, power factor (cos phi), active/reactive power, frequency, phase sequence, phase failure, and asymmetry for both single-phase and three-phase systems. With a wide auxiliary supply range of 160-690 V AC/DC and direct current measurement up to 10 A, this relay ensures reliable protection and control.

Advantages

• Digital LCD display for clear parameter readout
• Easy configuration via front buttons
• Two change-over contacts for flexible control
• DIN rail mounting for simple installation
• Wide operating temperature range (-25 to +60 °C)

Suitable for

• Industrial motor protection and monitoring
• Power factor correction systems
• Generator and transformer monitoring
• Energy management and load shedding

Key specifications

• Product Type: Multi-function Monitoring Relay
• Monitored Parameters: Current, Voltage, Cos Phi, Active/Reactive Power, Frequency, Phase Sequence, Phase Failure, Asymmetry
• Number of Phases: 1-phase and 3-phase
• Auxiliary Supply Voltage: 160-690 V AC/DC
• Measuring Voltage Range: 10-690 V AC/DC
• Measuring Current Range: 0.05-10 A AC/DC
• Output Contacts: 2 change-over contacts (2 CO)
• Contact Rating (AC-15): 3 A at 250 V AC
• Display: LCD
• Mounting: DIN rail (35 mm)
• Terminals: Screw terminals
• Degree of Protection: Front IP40, Terminals IP20
• Operating Temperature: -25 to +60 °C

Recommendations

For optimal performance, ensure the auxiliary supply voltage matches your system. Use appropriate fuses or circuit breakers for protection. This relay is ideal for integration into existing control panels.