M1L385-40 II Surge Protection Device (SPD) for Power Distribution - 40kA Surge Current, 230V/400VAC, Remote Alarm Port, DIN Rail Installation, IP20, Class C Protection

Product Description

The M1L385-40 II Surge Protection Device (SPD) is a highly reliable electrical protection system designed to safeguard equipment from overvoltage conditions and power surges in low-voltage distributing power systems. This device is specifically engineered for applications where both over-current and over-heat protection are essential, offering robust protection for sensitive electrical systems and electronic devices.

The M1L385-40 II model complies with Class C protection standards and is capable of withstanding surge currents up to 40kA (8/20μs test), making it suitable for use in power distribution systems and equipment vulnerable to transient surges. It is equipped with a remote alarm port (no-active contact), providing users with real-time monitoring capabilities and alerts for potential faults or failures, thus ensuring continued system integrity and reducing downtime.

The device is designed with an integrated base for easy installation and maintenance, typically mounted on a 35mm DIN rail, which is a common practice for equipment switchboards. This installation method ensures that the SPD can be securely fixed within the system without compromising the overall efficiency of the electrical setup. The device also supports flexible wiring sizes ranging from 1.5 mm² to 25 mm² for flexible connections, and up to 35 mm² for rigid connections, accommodating various installation requirements.

Key Specifications

Model: M1L385-40 II (3P+N)

Rated Working Voltage:

230V/400VAC (L-N / N-PE)

Rated Frequency: 48Hz to 62Hz

Maximum Operating Voltage:

385V (L-N) / 255V (N-PE)

Nominal Discharge Current (In):

20kA (L-N; N-PE)

Maximum Discharge Current (Imax):

40kA (L-N; N-PE)

Voltage Protection Level (Up):

1.8kV (L-N) / 1.0kV (N-PE)

Temporary Overvoltage (TOV) Characteristics:

5s at 385V (L-N) / 400V for 5 seconds

1200V (L-PE) / 200ms for failure characteristics

Short-Circuit Current:

25kArms

Size for Terminal Connection:

1.5mm² to 25mm² (flexible) / 35mm² (rigid)

Maximum Current for Alarm Port:

250V / 0.5A (AC) 0.1A (DC); 125V / 1A (AC) 0.5A (DC)

Shell Fire-Retardant Grade:

UL94 V-0

IP Grade:

IP20

Alarm Monitoring System

The M1L385-40 II SPD features a remote alarm port that provides real-time feedback regarding the operational status of the device. The alarm system is activated through no-active contact and helps in maintaining operational efficiency by alerting users when maintenance or replacement is needed, ensuring that equipment downtime is minimized. The remote alarm function also makes it easier to integrate into larger monitoring systems, improving oversight for critical infrastructure.

Installation Instructions

The device is designed for installation by authorized professionals only. It is typically mounted on a 35mm DIN rail inside an equipment switchboard. The SPD should be wired according to the following instructions:

Connection method: A common parallel connection can be used for wiring, with a maximum 16mm² multi-strand copper wire. The total length of the connection lead should not exceed 0.5 meters.

The alarm connection terminal is located at the bottom of the arrester. For remote monitoring, users should draw the wiring plugs and insert leads of the alarm into the appropriate holes in the wiring plugs, then insert the plugs into their original position and tighten the screws.

By following the instructions provided, the device can be integrated into the electrical system, providing robust protection against power surges and ensuring continuous, reliable operation.

Benefits of M1L385-40 II Surge Protection Device:

High Surge Current Capacity: With a maximum discharge current of 40kA, this SPD can handle significant power surges and transient voltages, providing excellent protection for sensitive equipment.

Remote Monitoring Capability: The built-in remote alarm port allows for easy monitoring and maintenance, ensuring that any issues can be quickly addressed.

User-friendly Installation: The DIN rail mounting system simplifies installation and makes it easy to integrate into existing electrical infrastructure.

Wide Voltage Protection Range: Capable of withstanding voltages up to 385V (L-N) and 255V (N-PE), making it suitable for a variety of applications in power distribution systems.

Durable and Safe: The fire-retardant shell (UL94 V-0) and IP20 protection ensure that the device remains safe and durable in various operating environments.

Application Areas:

Power Distribution Systems: Protects power systems from transient overvoltage conditions that could damage sensitive components.

Telecommunications Equipment: Ensures the safety of telecom gear by preventing surges from impacting performance.

Industrial Electrical Systems: Safeguards industrial machinery and equipment from electrical faults that could cause downtime or damage.

Renewable Energy Systems: Protects solar, wind, and other renewable energy systems from electrical surges caused by external factors.

Summary

The M1L385-40 II Surge Protection Device offers highly effective protection for electrical systems and sensitive equipment against overvoltage, power surges, and electrical faults. With its high surge current capacity, remote monitoring features, and easy installation via DIN rail mounting, it is a reliable choice for industrial, telecommunications, and power distribution applications.

Introduction 

Tianjin Estel Electronic Science and Technology Co., Ltd (ESTEL(GUANGDONG)TECHNOLOGY CO., LTD), located in China, is a professional supplier of integrated outdoor telecom cabinet and temperature control solutions for outdoor telecom base station. As a science and technology innovative company, we engage in the R&D, manufacture, and sales of telecommunication equipment. Estel has a well-established team of technical and management experts who can meet customers’ specific needs accurately.

The base station integrated solutions and products include outdoor integrated telecom equipment cabinet, battery cabinet, RRU cabinet, power supply cabinet, environment monitoring system, TEC peltier air conditioner, AC220V compressor air conditioner, DC48V variable frequency air conditioner, heat exchanger, rectifier, UPS, embedded telecom power system etc. All the above solutions and products can be custom made.

Our products and solutions have been deployed all over China. Our main domestic customers are China Telecom, China Mobile, China Unicom, State Grid, Shenzhen / Beijing Metro and Huawei / ZTE etc. In addition, our products have been exported to Europe, North America, South America, Central America, Southeast Asia, Africa, Australia, Mid East countries, etc.

“ Customers First, Quality First ” is always our principle. We have attained many certifications, such as ISO9001, ISO14001, OHSAS18001, CE, UL, FCC etc. AS a telecom integrated solutions / energy saving system integrator in China, We have strong advantages in technology competitiveness, management competitiveness ,service competitiveness and price competitiveness. Through many years of experiences in design, production and implementation of different projects around the world, we have gained great reputation. Relying on professional technique and strict quality control, we will continuously offer high cost-effective products and solutions to our respectable customers globally. We will always try our best to meet customers’ need and requirement.

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Trade & Market