Phoenix FLT-SEC Series: Industrial Surge Protectors - Selection Guide

Product Overview

The Phoenix FLT-SEC Series are high-performance surge protectors (SPDs) designed for industrial power networks, featuring T1 (Type 1) single-stage and T1+T2 (Type 1+2) combined protection. Adopting 续流 - free discharge gap technology, they safeguard industrial equipment from transient surges (e.g., lightning, switching overvoltage) in harsh environments. Covering single-phase/three-phase networks, N/PE line protection, and supporting S-type (neutral-earth separated) and C-type (neutral-earth combined) wiring, these DIN-rail mountable modules offer visual status indicators, remote alarm contacts, and wide voltage compatibility (264V/350V/440V AC). Ideal for power distribution, manufacturing, and chemical plants, they ensure reliable operation of critical industrial systems.

Model Quick Reference Table

Model No. Product Name Protection Type Wiring Type Rated Voltage (Uc) Surge Current Rating Key Features Application Scenarios
2905471 FLT-SEC-T1-350/25-P T1 (Type 1) - 350V AC 25kA (10/350μs) Screw terminal, single-stage protection Single-phase industrial power primary surge protection
2905470 FLT-SEC-T1+T2-3S-350/25-FM T1+T2 (Type 1+2) S-type (Neutral-Earth Separated) 350V AC 25kA (8/20μs) 3-phase protection, visual indicator + remote alarm Three-phase industrial power comprehensive surge protection
2905469 FLT-SEC-T1+T2-3C-350/25-FM T1+T2 (Type 1+2) C-type (Neutral-Earth Combined) 350V AC 25kA (8/20μs) Compact design, suitable for TN-C systems Three-phase equipment centralized protection
2905468 FLT-SEC-T1+T2-2S-350/25-FM T1+T2 (Type 1+2) S-type 350V AC 25kA (8/20μs) 2-phase protection, dual-stage suppression Two-phase industrial network surge protection
2905467 FLT-SEC-T1+T2-2C-350/25-FM T1+T2 (Type 1+2) C-type 350V AC 25kA (8/20μs) 2-phase compact design Space-constrained two-phase system protection
2905466 FLT-SEC-T1+T2-1S-350/25-FM T1+T2 (Type 1+2) S-type 350V AC 25kA (8/20μs) 1-phase protection, integrated T1+T2 Single-phase sensitive equipment surge protection
2905465 FLT-SEC-T1+T2-1C-350/25-FM T1+T2 (Type 1+2) C-type 350V AC 25kA (8/20μs) 1-phase cost-effective option Basic single-phase power surge protection
2907263 FLT-SEC-P-T1-N/PE-440/100-P T1 (Type 1) N/PE Line 440V AC 100kA (8/20μs) Screw terminal, N/PE line protection Neutral/protective earth line surge suppression
2907262 FLT-SEC-P-T1-N/PE-440/100-FM T1 (Type 1) N/PE Line 440V AC 100kA (8/20μs) Visual indicator + remote alarm TN/TT system N/PE line surge protection
2905473 FLT-SEC-P-T1-N/PE-350/100-P T1 (Type 1) N/PE Line 350V AC 100kA (8/20μs) Screw terminal, high-current capacity Industrial grounding system surge protection
2905472 FLT-SEC-P-T1-N/PE-350/100-FM T1 (Type 1) N/PE Line 350V AC 100kA (8/20μs) Fault alarm function Critical equipment grounding surge protection
2905989 FLT-SEC-P-T1-440/35-P T1 (Type 1) - 440V AC 35kA (10/350μs) High-voltage adaptation High-voltage power system primary protection
2908264 FLT-SEC-P-T1-3S-440/35-FM T1 (Type 1) S-type 440V AC 35kA (10/350μs) 3-phase high-voltage protection Heavy industry high-voltage distribution system
2905421 FLT-SEC-P-T1-3S-350/25-FM T1 (Type 1) S-type 350V AC 25kA (10/350μs) 3-phase redundant design Three-phase power system enhanced protection
2909589 FLT-SEC-P-T1-3S-264/50-FM T1 (Type 1) S-type 264V AC 50kA (10/350μs) Low-voltage high-current protection Low-voltage three-phase heavy-load system
2905988 FLT-SEC-P-T1-3C-440/35-FM T1 (Type 1) C-type 440V AC 35kA (10/350μs) 3-phase compact high-voltage High-voltage TN-C system protection
2905419 FLT-SEC-P-T1-3C-350/25-FM T1 (Type 1) C-type 350V AC 25kA (10/350μs) 3-phase cost-effective Standard three-phase TN-C system protection
2907390 FLT-SEC-P-T1-3C-264/50-FM T1 (Type 1) C-type 264V AC 50kA (10/350μs) Low-voltage high-current compact Low-voltage dense cabinet three-phase protection

Core Technical Specifications (Universal)

Parameter Value Notes
Protection Classes IEC Type 1 (T1), Type 1+2 (T1+T2) Model-dependent
Rated Voltage (Uc) 264V AC, 350V AC, 440V AC Matches industrial power grids
Surge Current Ratings 25kA/35kA/50kA/100kA 10/350μs (T1); 8/20μs (T1+T2)
Voltage Protection Level (Up) ≤1.5kV (typical) Low residual voltage protects sensitive devices
Response Time ≤25ns Fast response to transient surges
Operating Temperature -40℃~+80℃ Adapts to harsh industrial environments
Mounting Type 35mm DIN rail (NS 35/7.5) Space-saving for cabinet installation
Connection Type Screw terminals Secure wiring (10~16mm² conductors)
Protection Features Visual status indicator (green=normal, red=fault), remote alarm contacts (FM models) Real-time monitoring of protection status
Protection Class IP20 Dust-proof for cabinet mounting
Certifications IEC 61643-11, CE, UL, CSA Global industrial compliance
Wiring Compatibility S-type (TN-S/TT systems), C-type (TN-C systems) Fits diverse power system topologies

Application Scenarios & Recommended Models

1. Three-Phase Industrial Power Comprehensive Protection

  • Requirement: 380V three-phase four-wire system, T1+T2 combined protection
  • Recommended Models: 2905470 (S-type), 2905469 (C-type)
  • Key Reason: Covers direct and induced lightning surges; S/C-type options fit different grounding systems

2. High-Voltage Power System Protection

  • Requirement: 440V high-voltage input, 3-phase protection
  • Recommended Models: 2908264 (3S-type), 2905989 (single-stage)
  • Key Reason: High Uc (440V AC) and surge current capacity (35kA) handle high-voltage transients

3. N/PE Line Surge Suppression

  • Requirement: Prevent ground potential 反击 in TN/TT systems
  • Recommended Models: 2907263 (440V/100kA), 2905473 (350V/100kA)
  • Key Reason: Dedicated N/PE line protection, 100kA high-current discharge capacity

4. Low-Voltage High-Current System Protection

  • Requirement: 264V AC, three-phase heavy-load equipment
  • Recommended Models: 2909589 (3S-type), 2907390 (3C-type)
  • Key Reason: 50kA surge current rating, suitable for low-voltage high-load transients

5. Compact Cabinet Installation

  • Requirement: Space-constrained control cabinets, 1/2-phase protection
  • Recommended Models: 2905465 (1C-type), 2905467 (2C-type)
  • Key Reason: Compact design, C-type wiring saves cabinet space

Core Advantages

  • 续流 - Free Technology: T1-type discharge gap design eliminates power frequency 续流 risk, enhancing system reliability
  • Flexible Wiring: S-type/C-type options adapt to TN-S/TN-C/TT power system topologies
  • Intelligent Monitoring: FM models feature visual indicators and remote alarm contacts for real-time fault feedback
  • Wide Voltage Compatibility: 264V/350V/440V AC options match global industrial power grids
  • High Surge Capacity: Up to 100kA discharge current handles severe surge events
  • Industrial-Grade Durability: -40℃~+80℃ operating temperature, IP20 protection resists harsh environments
  • Easy Installation: DIN rail mounting and screw terminals simplify on-site deployment

Installation & Usage Notes

  • Wiring Matching: Select S-type for TN-S/TT systems (neutral-earth separated) and C-type for TN-C systems (neutral-earth combined)
  • Voltage Selection: Uc must exceed the system's maximum continuous operating voltage by 10-15% (e.g., 380V system → 350V AC model)
  • Wiring Specifications: Use 10~16mm² copper conductors; keep connection lines ≤0.5m to minimize impedance
  • Mounting Position: Install as close to the power input terminal as possible (primary protection) or near sensitive equipment (secondary protection)
  • Maintenance Checks: Regularly inspect status indicators (green=normal, red=fault); replace faulty modules promptly
  • Alarm Wiring: Connect FM model remote alarm contacts to the control system for centralized monitoring
  • Parallel Installation: Do not connect surge protectors in series; parallel installation only for redundant protection

Phoenix FLT-SEC Series: Industrial Surge Protectors - Selection Guide

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Created on：2025-11-19 11:32

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