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4P 275V T2 Surge Protective Device 20KA-40KA Lightning Protection SPD
Technical Specifications
• System Voltage: 400V AC (three-phase + N)
• Maximum Continuous Operating Voltage: 275V AC per phase
• Frequency: 50/60Hz
• Number of Poles: 4P (L1, L2, L3, N)
• Protection Mode: L-L, L-N, L-PE, N-PE
• Type Classification: Type 2 (T2)
• Nominal Discharge Current (In): 20kA (8/20μs)
• Maximum Discharge Current (Imax): 40kA(8/20μs)
• Voltage Protection Level (Up): ≤1.8kV
• Response Time: < 25ns
• Operating Temperature: -40°C to +85°C
• Status Indication: Multi-color visual indicator
• Connection Method: DIN rail mounting (35mm)
• Terminal Capacity: 25mm²
• Housing Material: Flame-retardant thermoplastic (UL94 V-0)
• Protection Degree: IP20
• Short Circuit Withstand: 25kA
Performance Characteristics
The device utilizes advanced metal oxide varistor technology with balanced protection across all four poles. Its synchronized response ensures equal voltage clamping on all phases and neutral. The integrated thermal protection system provides fail-safe operation, while the remote alarm contact enables system monitoring. The compact design allows for space-efficient installation in distribution boards.
Application Scope
- Industrial main distribution boards
- Commercial building power systems
- Data centers and server rooms
- Manufacturing facility electrical systems
- Hospital and healthcare facilities
- Renewable energy power plants
- Water treatment plants
- Telecommunication infrastructure
Installation Requirements
Installation should be performed by qualified electrical personnel according to IEC 60364 standards. The device must be installed in parallel with the main power supply using appropriate cross-section cables. Proper grounding with low impedance connections is essential for optimal performance. Regular inspection of the status indicator is recommended to ensure continuous protection.
Standards Compliance
• IEC 61643-11: Surge protective devices
• EN 61643-11: European standard
• GB 18802.11: Chinese national standard
• CE certification
• RoHS compliance
• EMC Directive 2014/30/EU
Performance Features
1. Complete four-pole protection
2. High energy absorption capacity
3. Fast response time
4. Thermal overload protection
5. Visual status indication
6. Remote signaling capability
7. Maintenance-free operation
8. Long service life
Environmental Specifications
• Storage Temperature: -40°C to +85°C
• Operating Humidity: 5% to 95% RH
• Altitude: ≤2000m above sea level
• Pollution Degree: 2
• Overvoltage Category: IV
• Expected Service Life: >20 years under normal conditions
• Environmental Compliance: RoHS, WEEE
