Phoenix FLT-SEC Series: T1-Type Industrial Surge Protectors - Selection Guide
Product Overview
The Phoenix FLT-SEC Series (P/H sub-series) consists of T1-type (IEC Type 1) industrial surge protectors designed for primary surge protection in power networks. Adopting free discharge gap technology, these modules cover single-phase/two-phase/three-phase configurations, support S-type (neutral-earth separated) and C-type (neutral-earth combined) wiring, and offer wide voltage compatibility (264V/350V/440V AC). With two functional variants—P-type (screw terminal, basic protection) and H-type (enhanced performance)—and FM-suffixed models featuring visual status indicators and remote alarm contacts, they effectively suppress lightning and switching surges. Ideal for industrial power distribution, manufacturing plants, and high-voltage systems, they ensure reliable operation of critical equipment in harsh environments.
Model Quick Reference Table
1. P-Subseries T1-Type Surge Protectors
| Model No. | Product Name | Wiring Type | Rated Voltage (Uc) | Surge Current Rating | Key Features | Application Scenarios |
|---|---|---|---|---|---|---|
| 2905422 | FLT-SEC-P-T1-350/25-P | - | 350V AC | 25kA (10/350μs) | Screw terminal, single-stage protection | Single-phase industrial power primary surge protection |
| 2905418 | FLT-SEC-P-T1-2S-350/25-FM | S-type (Neutral-Earth Separated) | 350V AC | 25kA (10/350μs) | 2-phase protection, visual indicator + remote alarm | Two-phase industrial network surge protection |
| 2905416 | FLT-SEC-P-T1-2C-350/25-FM | C-type (Neutral-Earth Combined) | 350V AC | 25kA (10/350μs) | 2-phase compact design, fault alarm | Two-phase TN-C system protection |
| 2907391 | FLT-SEC-P-T1-264/50-P | - | 264V AC | 50kA (10/350μs) | Low-voltage high-current protection, screw terminal | Low-voltage single-phase heavy-load system protection |
| 2905415 | FLT-SEC-P-T1-1S-350/25-FM | S-type | 350V AC | 25kA (10/350μs) | 1-phase protection, alarm function | Single-phase sensitive equipment surge protection (TN-S/TT systems) |
| 2907388 | FLT-SEC-P-T1-1S-264/50-FM | S-type | 264V AC | 50kA (10/350μs) | 1-phase low-voltage high-current, alarm | Low-voltage single-phase critical load protection |
| 2905987 | FLT-SEC-P-T1-1C-440/35-FM | C-type | 440V AC | 35kA (10/350μs) | 1-phase high-voltage, compact design | High-voltage TN-C system single-phase protection |
| 2905414 | FLT-SEC-P-T1-1C-350/25-FM | C-type | 350V AC | 25kA (10/350μs) | 1-phase cost-effective, alarm function | Standard single-phase TN-C system protection |
| 2907387 | FLT-SEC-P-T1-1C-264/50-FM | C-type | 264V AC | 50kA (10/350μs) | 1-phase low-voltage high-current, alarm | Low-voltage TN-C system single-phase protection |
2. H-Subseries T1-Type Surge Protectors (Enhanced Performance)
| Model No. | Product Name | Wiring Type | Rated Voltage (Uc) | Surge Current Rating | Key Features | Application Scenarios |
|---|---|---|---|---|---|---|
| 2907261 | FLT-SEC-H-T1-440/25-P | - | 440V AC | 25kA (10/350μs) | Enhanced performance, high-voltage adaptation | High-voltage single-phase system primary protection |
| 2907260 | FLT-SEC-H-T1-3C-440/25-FM | C-type | 440V AC | 25kA (10/350μs) | 3-phase protection, alarm function | High-voltage three-phase TN-C system surge protection |
| 2905871 | FLT-SEC-H-T1-3C-264/25-FM | C-type | 264V AC | 25kA (10/350μs) | 3-phase low-voltage, compact design | Low-voltage three-phase TN-C system protection |
| 2905968 | FLT-SEC-H-T1-264/25-P | - | 264V AC | 25kA (10/350μs) | Enhanced low-voltage protection, screw terminal | Low-voltage single-phase enhanced surge protection |
| 2907259 | FLT-SEC-H-T1-1C-440/25-FM | C-type | 440V AC | 25kA (10/350μs) | 1-phase high-voltage enhanced, alarm | High-voltage single-phase TN-C system enhanced protection |
| 2801615 | FLT-SEC-H-T1-1C-264/25-FM | C-type | 264V AC | 25kA (10/350μs) | 1-phase low-voltage enhanced, alarm | Low-voltage single-phase TN-C system enhanced protection |
Core Technical Specifications (Universal)
| Parameter | Value | Notes |
|---|---|---|
| Protection Class | IEC Type 1 (T1) | Primary surge protection against direct lightning |
| Rated Voltage (Uc) | 264V AC, 350V AC, 440V AC | Model-dependent, matches global industrial grids |
| Surge Current Ratings | 25kA/35kA/50kA (10/350μs) | Handles severe transient surges |
| Voltage Protection Level (Up) | ≤1.5kV (typical) | Low residual voltage protects sensitive equipment |
| Response Time | ≤25ns | Fast response to transient overvoltage |
| Operating Temperature | -40℃~+80℃ | Adapts to harsh industrial environments |
| Mounting Type | 35mm DIN rail (NS 35/7.5) | Space-saving for control 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 |
| Wiring Compatibility | S-type (TN-S/TT systems), C-type (TN-C systems) | Fits diverse power system topologies |
| Protection Class | IP20 | Dust-proof for cabinet mounting |
| Certifications | IEC 61643-11, CE, UL, CSA | Global industrial compliance |
Application Scenarios & Recommended Models
1. Two-Phase Industrial Network Protection
- Requirement: 350V AC two-phase surge protection with alarm
- Recommended Models: 2905418 (S-type), 2905416 (C-type)
- Key Reason: 2-phase design fits two-phase power networks; FM models enable fault monitoring
2. Low-Voltage High-Current System Protection
- Requirement: 264V AC, 50kA surge current tolerance
- Recommended Models: 2907391 (P-type), 2907388 (1S-FM), 2907387 (1C-FM)
- Key Reason: 50kA high surge capacity; low-voltage adaptation for 264V AC systems
3. High-Voltage System Primary Protection
- Requirement: 440V AC high-voltage surge protection
- Recommended Models: 2905987 (P-type 1C-FM), 2907261 (H-type P), 2907259 (H-type 1C-FM)
- Key Reason: 440V AC Uc adaptation; H-type models offer enhanced performance for critical high-voltage setups
4. Enhanced Performance Surge Protection
- Requirement: High-reliability surge protection for critical systems
- Recommended Models: 2907261 (H-T1-440/25-P), 2907260 (H-T1-3C-440/25-FM)
- Key Reason: H-subseries enhanced performance; suitable for mission-critical power networks
5. TN-C System Single-Phase Protection
- Requirement: C-type wiring for TN-C systems, alarm function
- Recommended Models: 2905414 (350V AC), 2907387 (264V AC), 2801615 (H-type 264V AC)
- Key Reason: C-type (neutral-earth combined) wiring fits TN-C systems; FM models support remote monitoring
Core Advantages
- Free Technology: T1-type discharge gap design eliminates power frequency risk, enhancing system reliability
- Dual Subseries Options: P-type (cost-effective) and H-type (enhanced performance) fit different reliability needs
- Flexible Wiring: S-type/C-type options adapt to TN-S/TT/TN-C power system topologies
- Wide Voltage Compatibility: 264V/350V/440V AC Uc options match global industrial power grids
- Intelligent Monitoring: FM models feature visual indicators and remote alarm contacts for real-time fault feedback
- Industrial-Grade Durability: -40℃~+80℃ operating temperature and IP20 protection resist 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 for primary surge 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: T1-Type Industrial Surge Protectors - Selection Guide
Created on：2025-11-20 13:03
