森長電子 List of Products and Services

This catalog includes specifications and diagrams for lightning protection products related to power supply, communication and signaling, and other lightning protection-related products for "high-speed line lightning protection units." We also introduce the causes of lightning damage, lightning protection measures for electrical equipment, and case studies of such measures. Technical documents and frequently asked questions are also included, so please use them as a reference for your selection. 【Contents (Example)】 ■ Features of high-speed line lightning protection units ■ Lightning damage countermeasures ■ Case studies of countermeasures ■ High-speed line lightning protection units for power supply ■ High-speed line lightning protection units for communication and signaling ■ Lightning protection-related products ■ Technical documents and frequently asked questions *For more details, please refer to the PDF document or feel free to contact us.

The "ALP/PLP" is a high-speed line lightning protection unit that uses surge energy attenuation technology. We offer a variety of series, including high-performance standard series and large-capacity power supply series. We propose more effective lightning protection measures in real fields by examining better countermeasure methods through on-site surveys and adopting high-speed line lightning protection units. 【Product Lineup (Example)】 ■ VNJ Series - General-purpose series with high performance and high capacity - Supports a wide range of applications including various signals and power supplies ■ VAJ Series - Series for large-capacity power supplies - Installed in the main circuit to prevent the intrusion of large-scale lightning surges such as direct lightning strikes ■ VTJ Series - Plug-in type series for signals - Compatible with various signal lines for communication, measurement, control, etc. *For more details, please refer to the PDF materials or feel free to contact us.

The "Grounding SPD Panel" is a product for grounding and equipotential bonding. 【Features】 ■ Connection between enclosures is possible ■ Combinations tailored to grounding design are also possible *For more details, please refer to the PDF document or feel free to contact us.

The "MLC-02" is a product that detects and counts lightning surges. It allows you to select the lightning surge detection sensitivity from 8 levels. When counting, it outputs a contact signal indicating that a surge has been detected and backs up the count value during a power outage. 【Features】 ■ Detects lightning surges using a current sensor method ■ Allows selection of lightning surge detection sensitivity from 8 levels ■ Outputs a contact signal indicating surge detection during counting ■ Backs up the count value during a power outage *For more details, please refer to the PDF document or feel free to contact us.

The "LDJ Series" is a high-performance low-profile series of high-speed line lightning protection units that use surge energy attenuation methods. It is a RoHS-compliant surge protective device (SPD) that can be used for both signal and power applications. The lightning protection performance is equivalent to the high-performance standard VNJ series, and it can be mounted on a DIN rail. 【Features】 ■ Normal/deterioration state contact output function ■ RoHS compliant ■ Lightning protection performance is equivalent to the high-performance standard VNJ series *For more details, please refer to the PDF materials or feel free to contact us.

The "VNJ Series" is a high-speed lightning protection unit that achieves high reliability in lightning protection measures through different surge energy attenuation methods. We offer a lineup for various signals such as communication, measurement, control, video, LAN, etc., as well as for single-phase and three-phase AC power supplies (2A to 50A) and DC power supplies. 【Features】 ■ For Signal Use - Complies with JIS standard C 5381-21 Category C2, D1 - Contact output function for normal/degraded states (optional: status LED display unit) - High surge withstand capability with a maximum discharge current of 20kA ■ For Power Use - Complies with JIS standard C 5381-1 Class II, III - Lamp display and contact output function for normal/degraded states *For more details, please download the PDF or feel free to contact us.

The "ACB" is a device that automatically resets the breaker in response to lightning surges and temporary overloads that invade from the commercial power supply system. When the breaker trips, it automatically resets after about 5 seconds. The control circuit of the auto control breaker is protected by a high-speed line lightning protection unit using surge energy attenuation methods, making it strong against lightning surges and ensuring high reliability. 【Features】 ■ Automatic reset function ■ Permanent trip function ■ Permanent trip reset function ■ Counter function *For more details, please refer to the PDF document or feel free to contact us.

The "ACB PL Series" is a device that automatically restores circuit breakers after they are tripped due to lightning surges or temporary overloads from commercial power systems. The restoration time of the circuit breaker can be set arbitrarily, and the number of restorations is also displayed. There are simple and low-cost models like "PL1" compared to conventional products, as well as compact and high-function models like "PL5" that range from low capacity (30A) to high capacity (100A). 【Features】 ■ The restoration time of the circuit breaker can be set arbitrarily ■ The number of restorations is displayed from 0 to 9, with LED indication *For more details, please refer to the PDF document or feel free to contact us.

The "VAJ Series" is a high-speed line lightning protection unit for power supplies that complies with JIS standards (JIS C 5381-11) Class I and II. It has a surge withstand capability of 25kA per line for a direct lightning current waveform defined as 10/350μs. It limits lightning surge voltage to below 1.5kV and achieves high protection performance through a combination with conventional surge energy attenuation methods. 【Features】 ■ Impulse current (I imp): 25kA (10/350μs) ■ Voltage protection level (Up): below 1.5kV ■ Displays abnormal occurrences during operation ■ Outputs abnormalities externally ■ Safety measures *For more details, please refer to the PDF document or feel free to contact us.

The "VCJ Series" is a high-speed line lightning protection unit that uses a surge energy attenuation method. It complies with JIS standard C5381-21 categories C2 and D1, and its performance and lineup cover those equivalent to the "VTJ Series." With its slim card-in design and customizable base unit, it flexibly meets needs that could not be accommodated due to space constraints in the past. 【Features】 ■ Surge energy attenuation method ■ Complies with JIS standard C5381-21 categories C2 and D1 ■ Space-saving design with slim card-in method ■ Base unit can be customized according to installation space and input/output terminals ■ Performance and lineup cover those equivalent to the VTJ Series *For more details, please refer to the PDF document or feel free to contact us.

The "VTJ Series" is a plug-in type high-speed lightning protection unit for signal lines that complies with JIS standards categories C2 and D1. Thanks to the plug-in design and bypass function, maintenance work is easy as there is no interruption in the circuit even when the main module is removed. Additionally, the dedicated socket can be easily mounted using a DIN rail. It can also serve as an input/output terminal block, achieving space-saving benefits. 【Features】 ■ Plug-in type ■ Complies with JIS standards categories C2 and D1 ■ Compatible with various signal lines for communication, measurement, control, etc. ■ Easy maintenance ■ Space-saving design *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce examples of lightning damage countermeasures for electrical equipment at aviation facilities. Airports, with their vast land area and tall structures such as terminal buildings and control towers, have seen an increase in lightning damage frequency due to recent enhancements in transport capacity, which have led to increased flights and larger aircraft being relocated to mountainous areas. To establish a highly reliable system essential for airport operations, lightning protection measures are also indispensable. Our company proposes various lightning protection measures considering different types of lightning damage for various electrical and communication equipment, including apron lighting systems, and installs surge protectors for power supply and communication/signaling purposes. [Main Lightning Protection Products (Partial)] ■ Surge Protectors for Power Supply - VAJ Series - VNJ Series ■ Surge Protectors for Communication and Signaling - VTJ Series - VCJ Series *For more details, please download the PDF or feel free to contact us.

We would like to introduce examples of lightning damage countermeasures for electrical equipment in universities (research facilities). Universities (research facilities) have many expensive devices installed, such as precision instruments, research equipment, and supercomputers. In addition to the damage to the equipment itself caused by lightning strikes, the interruption of experiments, loss of observational data, and disappearance of research data due to lightning damage can result in even greater losses. Our company has supplied a large number of lightning protectors, primarily for high-capacity power supplies, to a science and engineering university located in a mountainous area where lightning strikes are frequent and concerns about lightning damage to various equipment were raised. 【Case Overview】 ■ Issues - Attention is needed to ground lightning surges that can wrap around from lightning strikes to lightning rods and other devices. - In cases where there are multiple buildings, the ground potential difference between buildings can cause lightning surges to propagate not only to the building that was struck but also to nearby buildings. ■ Countermeasures: We propose VAJ-type lightning protectors for high-capacity power supplies at the main power distribution panel of floors with critical loads, and VNJ-type and VTJ-type lightning protectors for communication lines and signal lines depending on the equipment situation. *For more details, please download the PDF or feel free to contact us.

We would like to introduce examples of lightning damage countermeasures for electrical equipment at fire departments. Fire departments are critical facilities where the maintenance of power and communication lifelines is required at a high level even during emergencies. To support prompt and accurate command operations and disaster site activities in response to diversifying and large-scale disasters and increasing emergency requests, it is essential to implement lightning protection measures that do not compromise the functionality of communication equipment. Due to the importance of operations related to human life, our company proposes various measures to prevent system shutdowns caused by lightning damage and installs lightning protection devices for power supply, communication, and signaling. [Main Lightning Protection Products (Partial)] ■ Lightning protection devices for power supply - VAJ Series - VNJ Series ■ Lightning protection devices for communication and signaling - VTJ Series - VCJ Series *For more details, please download the PDF or feel free to contact us.

We would like to introduce examples of lightning damage countermeasures for electrical equipment in factories. In advanced factories, all equipment is highly digitized and interconnected through a network. As a result, damage in one area can often spread throughout the entire network, making it necessary to consider lightning protection measures for the entire factory. Our company focuses on lightning protection measures through on-site surveys, and we have a track record of implementing these measures in factories across various locations. We have received particularly high praise for our countermeasures concerning power equipment, such as servers, inverters, and DC power supplies, which are significantly affected by lightning, as well as instrumentation devices that are essential for plant operations. 【Main Lightning Protection Products (Partial)】 ■ Surge Protectors for Power Supply ・VAJ Series ・VNJ Series ■ Surge Protectors for Communication and Signal ・VTJ Series ・VCJ Series *For more details, please download the PDF or feel free to contact us.

We would like to introduce examples of lightning damage countermeasures for electrical equipment at dams. Dams are located in mountainous areas with a high frequency of lightning strikes, and due to the distance between the monitoring station and the equipment within the dam body, an environment conducive to potential differences is created. Lightning strikes in the vicinity have caused damage to dam management equipment, and if the dam management system stops, it could lead to the worst-case scenario, making reliable lightning protection measures necessary. Our company has installed the VAJ series at the main power panel of the electrical room to protect the monitoring station's equipment from direct lightning surges, and we have provided grounding SPDs to equalize potential between grounding electrodes. [Case Overview] - Proposals for lightning protection measures suitable for the local situation and design of lightning protection panels - Implementation of countermeasures for equipment at risk of lightning surges, including meteorological observation devices, discharge warning systems, CCTV cameras, telephone lines, leakage flow meters, water level gauges, seismometers, audit corridor lighting, and signal lines between the monitoring station and each gate. *For more details, please download the PDF or feel free to contact us.

We would like to introduce examples of lightning protection measures for electrical equipment at water-related treatment facilities. Water supply and sewage facilities are critical infrastructure where shutdowns are not permitted. However, many of these facilities are located in suburban or mountainous areas with frequent thunderstorms, and they often contain instrumentation equipment and telemetry, which are relatively susceptible to lightning strikes, leading to a high incidence of lightning damage. Our lightning arresters are installed on power supplies, communication lines, instrumentation signal lines, inverters, and various equipment both inside and outside the facility, protecting the equipment from lightning. 【Case Overview】 - Lightning arresters are installed on the power supply sections of telemetry panels and instrumentation panels, as well as on telemetry communication lines and measurement signals from field equipment. - We also propose installation on the power supply and signal lines of measurement equipment on the field side. - In cases where wiring distances are long, lightning arresters are installed on self-owned communication lines between equipment and control signal lines between panels. *For more details, please download the PDF or feel free to contact us.

We would like to introduce examples of lightning damage countermeasures for electrical equipment in disaster prevention administrative wireless systems. Disaster prevention administrative wireless systems are essential equipment for local governments' crisis management, serving as a means of communication to convey emergency information to residents. In recent years, there has been an increasing trend of operational failures and damage to wireless substation equipment due to lightning strikes, making it crucial that these systems function reliably when needed. It is necessary to implement lightning protection measures that do not compromise the functionality of such highly public wireless equipment. Our company often installs automatic power lightning protection devices with built-in lightning arresters and auto control breakers, as well as emergency power switching panels. 【Main Lightning Protection Products】 ■ Lightning Arresters for Power Supply ・VAJ Series ・VNJ Series ■ Lightning Protection Related Products ・ALPS Series ・Emergency Power Switching Panels *For more details, please download the PDF or feel free to contact us.

We would like to introduce examples of lightning damage countermeasures for electrical equipment in CCTV cameras. CCTV cameras are becoming smaller and more high-performance, which tends to make them more vulnerable to lightning. In particular, since they are installed outdoors to monitor roads, rivers, and flooding, they are susceptible to both direct and induced lightning strikes. To protect important social infrastructure equipment, our lightning arresters are implemented in the equipment housing to safeguard against lightning damage. 【Case Overview】 ■ Issue: Surveillance cameras for road information, etc., are installed at high outdoor locations, resulting in a significant amount of equipment damage due to lightning. ■ Countermeasure: Lightning arresters and auto-control breakers are built into the equipment housing of the surveillance cameras. *For more details, please download the PDF or feel free to contact us.

This document introduces the selection of surge protectors for power supply. Surge protectors for power supply are selected based on the circuit configuration, voltage, and current of the power line to be installed. The circuit configuration and rated voltage, among other details, are clearly presented in a table. Additionally, it explains the setting positions of surge protectors and breakers for power supply. Please feel free to download it for your reference. [Contents] ■ Circuit configuration ■ Rated voltage ■ Rated current ■ Setting positions of surge protectors and breakers for power supply *For more details, please download the PDF or feel free to contact us.

This document introduces lightning protection measures using high-speed line lightning protection units. It explains lightning protection measures such as "external lightning protection systems" and "internal lightning protection systems," as well as the causes of lightning damage and the types and mechanisms of SPDs (Surge Protective Devices). The content is designed to be easily referenced when considering lightning protection measures. Please feel free to download and take a look. 【Contents (partial)】 ■ Lightning protection measures ■ Lightning rods ■ SPD (Surge Protective Device) ■ Causes of lightning damage ■ Lightning protection measures for electrical equipment *For more details, please download the PDF or feel free to contact us.