Carlo Gavazzi - DPB01CM48 - True RMS 3-Phase Monitoring Relay

The Carlo Gavazzi DPB01CM48 is a True RMS 3-phase monitoring relay designed to oversee phase sequence, phase loss, and over/under voltage conditions in three-phase systems. It ensures that all three phases are present with the correct sequence and that voltages remain within set limits, providing reliable protection for industrial equipment.  

Key Features:

• True RMS Measurement: Accurately monitors phase-to-phase or phase-to-neutral voltages, ensuring precise detection of voltage anomalies.

• Adjustable Voltage Levels: Allows separate adjustment of upper and lower voltage limits to tailor protection parameters to specific application needs. 

• Time Delay Function: Features an adjustable delay on alarm function ranging from 0.1 to 30 seconds, preventing nuisance tripping due to transient conditions. 

• Phase Sequence and Loss Detection: Identifies incorrect phase sequences and phase loss conditions, triggering immediate relay release to protect connected equipment. 

• LED Indicators: Provides clear visual status with green LED for power supply, red LED for alarm conditions (flashing during delay time), and yellow LED for relay activation.

Technical Specifications:

• Input Specifications:

• Measuring Ranges: Selectable via DIP switches; for DPB01CM48: 380 V to 480 V AC (phase-to-phase) or 220 V to 277 V AC (phase-to-neutral). 

• Frequency Range: 45 to 65 Hz. 

• Output Specifications:

• Relay Type: Single Pole Double Throw (SPDT).

• Contact Ratings: 8 A at 250 V AC (resistive load); 5 A at 24 V DC. 

• Mechanical Life: ≥30 million operations.

• Electrical Life: ≥100,000 operations at 8 A, 250 V, cos φ = 1. 

• General Specifications:

• Power Supply: Measures its own supply voltage; rated operational voltage for DPB01CM48 is 380 V to 480 V AC ±15%. 

• Power Consumption: Approximately 13 VA at 400 V AC, 50 Hz.

• Operating Temperature: -20°C to +60°C.

• Housing Material: PA66 or Noryl. 

• Mounting: DIN-rail in accordance with DIN/EN 50 022. 

• Dimensions: 22.5 mm (W) x 80 mm (H) x 99.5 mm (D).