Phoenix VAL-SEC-T2 Series: T2 Class Surge Protection Devices (SPDs) - Comprehensive Application & Selection Guide

Product Positioning & Core Value

The Phoenix VAL-SEC-T2 Series represents a high-performance lineup of Type 2 surge protection devices (SPDs) engineered to safeguard industrial power systems, electrical infrastructure, and sensitive equipment from transient voltage surges. As critical components in surge protection layers, these modules mitigate risks from switching operations, lightning-induced disturbances, and grid fluctuations, ensuring uninterrupted operation of power distribution systems. With versatile configurations for AC/DC power networks, multiple pole designs (1S~3C), wide voltage ratings (120DC~440V AC), and functional variants (FM Global certification, variable frequency compatibility, high-surge capacity), the series is ideal for industrial facilities, commercial buildings, hazardous areas, and renewable energy systems. Its robust design, compliance with IEC 61643-12, and 35mm DIN rail mounting make it a reliable choice for harsh industrial environments and critical power infrastructure.

Product Family Overview

The VAL-SEC-T2 Series is categorized by pole configuration, voltage type (AC/DC), and functional features to meet diverse application needs:

1. AC Surge Protection Modules

• Function: Protect AC power systems (single-phase/three-phase) from transient surges.
• Pole Configurations: 1S (1-pole + PE), 2S (2-pole + PE), 3S (3-pole + PE), 3C (3-pole + N + PE), N/PE (Neutral + PE).
• Voltage Ratings: 175V, 350V, 440V AC.
• Functional Variants:
  • FM: FM Global certified (hazardous area compliant, Class I/II/III, Div 2).
  • P: Standard performance (general industrial applications).
  • VF: Variable frequency compatible (for inverter-driven systems).
• Typical Models: VAL-SEC-T2-3S-350-FM, VAL-SEC-T2-N/PE-350-P, VAL-SEC-T2-3C-440-FM.

2. DC Surge Protection Modules

• Function: Safeguard DC power systems (batteries, solar PV, industrial DC circuits) from surges.
• Pole Configurations: 2+0 (2-pole, no PE), 2+F (2-pole + filter).
• Voltage Ratings: 48DC, 120DC, 220DC, 380DC.
• Functional Variants: FM (hazardous area compliant), P (standard performance).
• Typical Models: VAL-SEC-T2-2+0-48DC-FM, VAL-SEC-T2-220DC-P, VAL-SEC-T2-2+F-48DC-FM.

Technical Specifications (Universal Parameters)

Detailed Function Module Introduction

1. AC Surge Protection Modules (Pole Configurations)

1.1 Single-Phase & Neutral-PE Modules

1.2 Two-Phase Modules

1.3 Three-Phase Modules

2. DC Surge Protection Modules

Application Scenario Analysis

1. Industrial Power Distribution Systems

Recommended Configuration:

• 3-Phase 4-Wire Systems: VAL-SEC-T2-3C-350-FM (2905339)
• 3-Phase VFD Systems: VAL-SEC-T2-3S-350VF-FM (2909590)
• Single-Phase Auxiliary Systems: VAL-SEC-T2-N/PE-350-P (2905347)

Implementation Advantages:

• 350kA surge capacity withstands heavy industrial transient surges.
• VF variant compatibility with inverter-driven equipment (motors, pumps).
• FM certification enables deployment in hazardous production areas (chemical, oil & gas).

2. Hazardous Area Electrical Infrastructure

Recommended Configuration:

• AC Systems: VAL-SEC-T2-3S-350-FM (2905340), VAL-SEC-T2-1S-350-FM (2905333)
• DC Systems: VAL-SEC-T2-2+0-48DC-FM (2907865), VAL-SEC-T2-2+F-48DC-FM (1033786)

Implementation Advantages:

• FM Global certification (Class I/II/III, Div 2) meets hazardous area safety standards.
• Robust housing (IP20, -40°C~85°C) resists harsh environmental conditions.
• Fast response time (≤25ns) protects sensitive equipment from surge damage.

3. Renewable Energy & DC Power Systems

Recommended Configuration:

• Solar PV (380V DC): VAL-SEC-T2-2+0-380DC-FM (2907876)
• Battery Storage (220V DC): VAL-SEC-T2-220DC-P (2907879)
• Low-Voltage DC (48V): VAL-SEC-T2-2+F-48DC-FM (1033786)

Implementation Advantages:

• Wide DC voltage range (48V~380V) covers most renewable energy applications.
• Unidirectional polarity optimized for DC power flow.
• FM certification ensures safety in outdoor and hazardous renewable energy installations.

4. Commercial Building Electrical Networks

Recommended Configuration:

• Main Distribution Panels: VAL-SEC-T2-3C-440-FM (2909968)
• Single-Phase Circuits: VAL-SEC-T2-1S-175-FM (2905348)
• Neutral-Ground Protection: VAL-SEC-T2-N/PE-175-P (2905356)

Implementation Advantages:

• 440V AC rating matches commercial building grid voltage.
• 175kA capacity balances protection and cost-effectiveness.
• LED status indicators enable easy maintenance for facility managers.

Selection Guide

Step 1: Determine Voltage Type & Rating

• AC Systems: Select based on grid voltage (175V/350V/440V) and phase configuration (single/three-phase).
• DC Systems: Match with DC power source voltage (48V/120V/220V/380V) and polarity requirements.

Step 2: Choose Pole Configuration

Step 3: Select Functional Features

• Hazardous Areas: Choose FM suffix models (FM Global certified).
• Variable Frequency Systems: Select VF suffix models (inverter-compatible).
• General Industrial Applications: Opt for P suffix models (standard performance).
• Mixed-Load Systems: Consider dual-capacity models (e.g., 350/40kA) for versatile protection.

Step 4: Confirm Surge Capacity Requirements

• Heavy-Duty Industrial: 350kA models (e.g., VAL-SEC-T2-3S-350-FM)
• Light-Duty/Commercial: 175kA models (e.g., VAL-SEC-T2-1S-175-FM)
• Sensitive Equipment: Lower Up models (≤1.2kV) for minimal voltage distortion.

Installation & Maintenance Guide

Installation Steps:

1. Mounting: Snap the module onto a 35mm DIN rail in the power distribution panel (install as close to the power entry point as possible).
2. Wiring: Connect conductors according to pole configuration (L/N/PE for AC; +/_ for DC) using 1.5~6mm² copper conductors.
3. Torque: Tighten terminal screws to 0.8~1.2Nm for secure connections.
4. Grounding: Ensure proper PE grounding (≤4Ω ground resistance) to maximize surge dissipation.
5. Testing: Verify LED indicator (green = normal) post-installation.

Maintenance Points:

• Status Monitoring: Regularly check LED status (red = faulty, replace immediately).
• Replacement: Replace modules after surge events (faulty LED) or every 10 years (service life).
• Environmental Control: Keep installation area dry and free of dust (IP20 protection).
• Inspection: Conduct annual inspections for loose connections and damage to the housing.

VAL-SEC-T2 Series vs. Traditional Surge Protection Solutions

Summary & Next Steps

The Phoenix VAL-SEC-T2 Series delivers comprehensive, reliable surge protection for AC/DC power systems across industrial, commercial, and hazardous environments. With its versatile pole configurations, wide voltage ratings, and functional variants (FM, VF, high-surge capacity), the series adapts to diverse application needs while meeting global safety standards. By selecting the appropriate model based on voltage type, pole configuration, and environmental requirements, you can effectively mitigate surge risks and ensure uninterrupted operation of critical power infrastructure.