Mersen X1018322 - High Voltage DIN Back-up fuse for Transformer Limitor® VDE T402 24kVAC IEC 50A d65mm, L442mm With Thermal Striker 80N Low power losses
Mersen

X1018322

Alternate Item Number: 45DB240V50PTS

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Overview

The Mersen X1018322 is a high-voltage DIN back-up fuse from the Limitor®-PTS range, engineered for reliable transformer protection in high-voltage switchgear and controlgear. Designed to meet VDE T402 standards, this fuse operates at 24kVAC and has a rated current of 50A. It features innovative fuse-element designs that significantly reduce power losses, contributing to improved energy efficiency within the system. A key innovation is the integrated thermal striker, rated at 80N, which actively prevents overheating within the fuse compartment of the switchgear, enhancing operational safety and longevity. Mersen utilizes premium materials for superior performance: fuse elements are constructed from pure silver, caps are silver-coated copper, and the body is made of durable ceramic. This specific model has a diameter of 65mm and a length of 442mm. The Limitor®-PTS HV fuse-links are specifically designed for transformer protection in conjunction with air or gas-insulated switchgear, safeguarding against the thermal and dynamic stresses of short-circuits. Leading manufacturers like Siemens and Ormazabal recommend the Limitor®-PTS HV fuses for use in their gas-insulated switchgear, underscoring their quality and compatibility. Key specifications include a breaking capacity of 63 kA, an I²t clearing value of 50 kA²s, and a minimum breaking current of 205 A. The cold resistance (R20) is 26 mΩ, with a power dissipation at In of 106 W. The fuse weighs 2.2 kg. This product is manufactured in the US and is part of Mersen's extensive high-voltage fuse system.
  • Mersen Limitor®-PTS HV DIN Back-up Fuse for Transformer Protection
  • Rated Voltage: 24kVAC, Rated Current: 50A
  • Integrated Thermal Striker (80N) to Prevent Overheating
  • Low Power Losses with Innovative Fuse-Element Design
  • High Breaking Capacity: 63 kA, I²t: 50 kA²s

Specifications

AC Voltage Rating
24 kV
Amperage Rating
50 A
Application
Best used in SF6 insulated switch gear and compact switch gear HV Transformer protection
Body Material
Ceramic
Brand Name
Mersen
Connection
Cylindrical
Connection Material
Silver-Plated Copper
Current Rating
50 A
Interrupt Rating
65 kA
Material
Ceramic, Silver, Copper
Mounting
Clip
Series
Limitor®-PTS
Size
d65mm, L442mm
Size
20 x 2.56 in
Size
508 x 65 mm
Special Features
Low switching voltage Large current ratings range Very low power losses Energy efficency New thermal striker patented by Mersen to prevent overheating Medium striker 80N / 30mm New cap design for a better compatibility with all types of clips and easier assembly Outdoor and indoor use Coordination with IEC 60787, IEC 62271-105 and VDE 0670 T303
Standard
IEC 60282-1 VDE 0670 part 4 VDE 0670 part 402 DIN 43625
Sub Brand
Limitor®
Type
DIN HV Back-up Fuses for Transformers
Type Of Indicators
Striker
Voltage Rating
24 kVAC
Package Dimensions (L x W x H)
20 in x 2.56 in x 2.56 in
Package Dimensions (L x W x H)
508 mm x 65 mm x 65 mm
Package Weight (Imperial)
7.275 lb
Package Weight (Metric)
3.300 kg
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

Frequently Asked Questions about Mersen

What industries and applications are Mersen products used for?

Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.

What are the main product lines offered by Mersen?

Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.

What are the key features of Mersen products?

Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.

What environmental ratings do Mersen products have?

Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.

What accessories are available for Mersen products?

Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.

How are Mersen products typically installed?

Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.

What certifications and standards do Mersen products comply with?

Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.

What technical support does Mersen offer?

Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.