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3 Phase Surge Suppressor -BT 5L-WF MBC 385 3+1
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3 Phase Surge Suppressor -BT 5L-WF MBC 385 3+1

3 Phase Surge Suppressor BT 5L-WF MBC 385 3+1 (840846) is designed for installation at LPZ 0A-2 boundary or higher, providing effective protection for low-voltage equipment against surge damage. It is suitable for SPD Class I + II (Type 1 + 2 / Class B + C) applications in three-phase 3-wire plus ground (3W+G) power supply systems. This combined Type 4-1 SPD device is manufactured in compliance with IEC 61643-11 and UL 1449 4th edition standards, ensuring high reliability and performance.

  • Type

    BT 5L-WF MBC 385 3+1

  • Art.-No.

    840846

  • Features

    1. Adopting plug-in PCB SPD class I+II protection module.
    2. Visual protection status indication, and failure indication function.
    3. IP65 waterproof protection, suitable for outdoor application.
    4. Built-in wiring terminal, easy for connection.
    5. Total lightning impulse current up to 20kA 10/350 μs.
    6. High discharge capacity,quick response.

Inquiry
Download Datasheet
3 Phase Surge Suppressor
SPD
Surge Protector
Location of Use: Main Distribution Boards
System Type:
3 Phase/3W+G
Modules:
3P+NPE
Protection Elements:
High Energy MOV+ High Energy GDT
High Surge Currents:
limp=8/20 kA (10/350μs), Imax=50/65kA(8/20μs)

3 Phase Surge Suppressor devices are essential for protecting industrial and commercial electrical systems from dangerous voltage spikes. Designed for three-phase power networks, these suppressors prevent equipment damage, reduce downtime, and ensure continuous, safe operation. Ideal for factories, data centers, and large-scale facilities, they offer high reliability and easy installation. Investing in a quality 3 Phase Surge Suppressor extends the life of critical equipment and safeguards against costly repairs or replacements due to electrical surges or lightning strikes.

Features

1. High Surge Protection Capacity – Handles large transient voltages from lightning or switching surges.
2. Three-Phase Protection – Designed specifically for 3-phase power systems (L1, L2, L3 + N + PE).
3. Fast Response Time – Reacts within nanoseconds to suppress voltage spikes instantly.
4. Thermal Protection – Includes thermal disconnect to prevent overheating or fire risk.
5. LED Status Indicators – Visual indicators for operational and fault status.
6. Replaceable Modules – Modular design allows for easy maintenance and replacement.
7. DIN Rail Mounting – Easy installation in control panels or distribution boards.
8. Compliance with Standards – Meets IEC 61643 and UL 1449 safety and performance standards.
Surge Protective Device

Advantages

1. Reduces Equipment Downtime – Minimizes interruptions caused by surge-related failures.
2. Extends Equipment Lifespan – Prevents premature aging of electrical components.
3. Lowers Maintenance Costs – Reduces the need for frequent repairs and part replacements.
4. Enhances Operational Safety – Decreases the risk of electrical fires or accidents.
5. Protects Sensitive Electronics – Guards delicate circuits from unpredictable voltage spikes.
6. Improves Power Quality – Helps maintain consistent voltage levels for smoother operation.
7. Increases System Reliability – Ensures critical systems remain online during power disturbances.
8. Supports Compliance Requirements – Helps meet industry regulations and insurance standards.
Surge Protection Device

Applications

1. Industrial Facilities – Protects heavy machinery and automation systems from power surges.
2. Commercial Buildings – Safeguards HVAC systems, elevators, and lighting from voltage spikes.
3. Data Centers – Ensures continuous power quality for servers and networking equipment.
4. Telecommunication Stations – Protects critical communication infrastructure from transient surges.
5. Hospitals and Medical Equipment – Shields sensitive diagnostic and life-saving devices.
6. Renewable Energy Systems – Used in solar and wind power installations to protect inverters and control panels.
7. Water Treatment Plants – Protects pumps, motors, and monitoring systems.
8. Transportation Systems – Used in railway control rooms, airports, and metro systems for surge protection.
Surge Protection

Installation

1. Power Off – Ensure the main power supply is completely turned off before starting the installation to avoid electrical hazards.
2. Choose Location – Select a suitable spot near the main distribution panel or critical equipment for effective surge protection.
3. Prepare Mounting – Confirm that a DIN rail is installed and ready for mounting the surge suppressor.
4. Mount Device – Securely attach the surge suppressor onto the DIN rail by snapping it into place.
5. Connect Wiring – Connect L1, L2, L3 (phases), Neutral (N), and Protective Earth (PE) wires to the corresponding terminals.
6. Verify Grounding – Ensure the PE terminal is properly grounded to the building’s earthing system.
7. Inspect Installation – Double-check all connections and mounting for safety and compliance.
8. Power On & Test – Restore power, check LED indicators for normal operation, and verify surge suppressor functionality.
BT 5L-WF MBC 385 3+1 Mounting

Technical Data

Product Showcase

Lightning Protection
Mounting
Surge Protector Device
TVSS

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