Hager EU400 Grid Protection Relay NA Protection VDE AR-N 4105 24 V AC/DC

The Hager EU400 is a grid protection relay designed for NA protection according to VDE AR-N 4105. It monitors voltage and frequency in three-phase systems to ensure safe grid disconnection. With a compact 4-module DIN rail design and backlit LCD display, it offers reliable monitoring and easy configuration.

Advantages

Complies with VDE AR-N 4105 standards, ensuring safe operation in photovoltaic and other distributed generation systems. The relay features two potential-free changeover contacts for flexible integration. Its wide measuring range and frequency monitoring provide comprehensive protection.

Suitable for

• Photovoltaic systems requiring NA protection
• Distributed generation grid connection points
• Industrial and commercial power monitoring

Key specifications

• Product Type: Grid Protection Relay
• Compliance: VDE AR-N 4105 (NA Protection)
• Monitored Parameters: Over/Under Voltage, Over/Under Frequency, ROCOF, Vector Jump
• Number of Phases: 3-phase (L1, L2, L3 + N)
• Auxiliary Supply Voltage: 24 V AC/DC
• Measuring Voltage Range (L-N): 50 - 300 V AC
• Measuring Voltage Range (L-L): 80 - 520 V AC
• Frequency Range: 45 - 65 Hz
• Output Relays: 2 potential-free changeover contacts (NO/NC)
• Output Contact Rating: 5 A / 250 V AC
• Mounting: DIN rail (4 modules)
• Display: Backlit LCD
• Configuration: Front panel buttons, USB
• Protection Degree: IP40 front, IP20 terminals
• Operating Temperature: -20°C to +55°C
• Housing Material: Self-extinguishing thermoplastic

Recommendations

For optimal performance, ensure proper installation by a qualified electrician. Use appropriate cable cross-sections as specified.