Reletek Single-Phase Over and Undervoltage Protector 25A

Microcontroller-Based Design: Ensures precise monitoring and protection against voltage and current anomalies.

• Dual 3-Digit Display: Provides real-time voltage readings for accurate monitoring.
• Adjustable Settings:
  • Overvoltage Protection: Settable between 220V and 280V.
  • Undervoltage Protection: Settable between 140V and 210V.
  • Reset/Start Delay: Adjustable from 5 to 600 seconds, allowing customization based on specific requirements.
• Trip Delays:
  • Overvoltage Trip Delay: Less than 0.5 seconds.
  • Undervoltage Trip Delay: 0.5 seconds for voltages ≥120V; 0.1 seconds for voltages <120V.
  • Overcurrent Trip Delay: Adjustable between 5 to 600 seconds.
• Voltage Measurement Accuracy: Within 2% across the entire range.
• Output Contact: Equipped with 1 Normally Open (NO) contact.
• Mounting: Designed for DIN rail installation, facilitating easy integration into electrical panels.
• Protection Degree: Rated at IP20, suitable for indoor environments.

Applications

• Residential and Commercial Electrical Systems: Protects appliances and equipment from voltage sags, surges, and overcurrent situations.
• Industrial Equipment: Ensures machinery operates within safe voltage and current parameters, preventing potential damage.
• HVAC Systems: Safeguards heating, ventilation, and air conditioning units from electrical anomalies.

Benefits

Enhanced Equipment Longevity: By preventing exposure to harmful voltage and current levels, the RD-MVA 63A extends the lifespan of connected devices. ✔ Customizable Protection: Adjustable settings allow users to tailor protection parameters to specific needs. ✔ User-Friendly Interface: The dual display and LED indicators provide clear status updates and fault indications. ✔ Reliable Performance: Microcontroller-based design ensures accurate detection and rapid response to electrical faults.

• Rated supply voltage:  AC 220V
• Operation voltage range:  AC 100V~400V
• Rated frequency:  50/60Hz
• Overvoltage(U>)setting range:  220~280V
• Undervoltage(U<) setting range:  140~210V
• Hysteresis:  ﹥U:5V; <U:3V
• Reset/start delay:  Ts: 5s~600s
• Overcurrent faults trip delay range:  Ta: 5s~600s
• Overvoltage（U>) trip delay:  <0.5s
• Undervoltage（U<） trip delay:  ≥120V:0.5s,<120V: 0.1 s
• Overcurrent（l>) trip delay:  ln<lr *<lmax: Ta; Ir *≥lmax:≤0.1s
• Voltage measurement accuracy:  2%(over the whole range)
• Rated insulation voltage:  400V
• Output contact:  1NO
• Protection degree: IP20
• Altitude: 2000m

Front panel

Function diagrams

Symbol

Wiring diagram