Voltage control relay Tipo 70.33

frequencydigital

Brief description
The Type 70.33 control relay is an Interface Protection System (SPI) that trips the Interface Device (DDI) when voltage and frequency values do not comply with the CEI 0-21 standard. It features redundant measurement systems for functional safety and provides advanced functions for network quality monitoring and microgrid applications.

Functions and features

• Detection and tripping of the Interface Device (DDI) for voltage and frequency values non-compliant with CEI 0-21
• Universal supply voltage: 24–48 V DC and 110–240 V AC
• Redundant measurement system for functional safety
• Monitoring of overvoltage and undervoltage phase-to-neutral and phase-to-phase
• Voltage monitoring on a 10-minute average
• Underfrequency and overfrequency detection
• RoCoF monitoring (suitable for microgrid applications)
• Stored test programs: Test Box 1 and 2 for commissioning and maintenance
• Error log generation for historical analysis
• Dedicated digital inputs for DDI control, external signal and local command

Series
Series 70

Applications
Suitable for grid/generation interface systems, continuity control and functional safety in installations with distributed generation integration and microgrids.

Technical characteristics / specifications

• Type: Interface Protection System (SPI)
• Model: Type 70.33
• Series: 70
• Supply voltage: 24–48 V DC; 110–240 V AC
• Functional safety: redundant measurement system
• Voltage monitoring: overvoltage/undervoltage phase-neutral and phase-phase; 10-minute average
• Frequency monitoring: underfrequency and overfrequency detection
• RoCoF monitoring for microgrid applications
• Stored test programs: Test Box 1 and 2
• Diagnostic functions: error log for historical analysis
• Digital inputs: DDI control, external signal, local command