Wholesale 4P 275V T2 Surge Protective Device 20KA-40KA Lightning Protection SPD Suppliers, Factory

This four-pole Type 2 surge protective device offers complete protection for three-phase electrical systems with neutral conductor. Designed for 400V AC systems with maximum continuous operating voltage of 275V per phase, the device provides comprehensive protection against lightning-induced surges and switching transients. Compatible with both 50Hz and 60Hz power networks, it ensures reliable performance in various industrial and commercial applications with its 20kA nominal discharge capacity.

Product Description

Technical Specifications
System Voltage400V AC (3P+N)
Max Operating Voltage275V AC
Frequency50/60Hz
Number of Poles4P (L1,L2,L3,N)
Type ClassificationType 2 (T2)
Nominal Discharge (In)20kA
Max Discharge (Imax)40kA
Protection Level (Up)≤1.8kV
Response Time< 25ns
Operating Temp-40°C to +85°C
Mounting35mm DIN Rail
IP RatingIP20
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.

  • Complete four-pole protection
  • High energy absorption capacity
  • Fast response time
  • Thermal overload protection
  • Visual status indication
  • Remote signaling capability
  • Maintenance-free operation
  • Long service life
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 & Standards

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.

• IEC 61643-11: Surge protective devices
• EN 61643-11: European standard
• GB 18802.11: Chinese national standard
• CE Certification & RoHS Compliance
Environmental Specifications
  • Storage Temperature: -40°C to +85°C
  • Operating Humidity: 5% to 95% RH
  • Altitude: ≤2000m
  • Pollution Degree: 2
  • Overvoltage Category: IV
  • Expected Service Life: >20 years
Detailed Product Display
Frequently Asked Questions
1. What is the primary function of this Type 2 SPD?
This Type 2 (T2) Surge Protective Device is designed to protect low-voltage electrical installations against surge voltages caused by indirect lightning strikes and switching operations.
2. Why does this device have 4 poles?
The 4P configuration provides complete protection for three-phase plus neutral (3P+N) systems, ensuring that all conductors, including the neutral line, are protected against voltage spikes.
3. How do I interpret the visual status indicator?
The multi-color indicator provides a quick visual check: typically, green signifies the device is operational, while a change in color (often red) indicates the internal thermal protection has tripped and the module needs replacement.
4. Can this SPD be monitored remotely?
Yes, this model includes remote signaling capability, allowing for connection to an alarm system or BMS to monitor the protection status from a central location.
5. Is it mandatory to use a professional for installation?
Yes, installation must be performed by qualified electrical personnel to ensure compliance with IEC 60364 standards and to guarantee the safety and effectiveness of the lightning protection system.
6. What happens at the end of its service life?
The device features thermal disconnectors. When it reaches the end of its life due to repeated surge handling, it safely disconnects from the grid and triggers the visual/remote status indicators.

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