Mersen Z1018324 - High Voltage DIN Back-up fuse for Transformer Limitor® VDE T402 24kVAC IEC 80A d78mm, L442mm With Thermal Striker 80N Low power losses
Mersen

Z1018324

Alternate Item Number: 45DB240V80PTS

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Overview

The Mersen Z1018324 Limitor®-PTS high-voltage DIN back-up fuse is engineered for transformer protection in medium-voltage switchgear and controlgear up to 24kVAC. This 80A fuse-link features a 78mm diameter and 442mm length, optimized for compatibility with Siemens and Ormazabal gas-insulated switchgear systems. The fuse-element is manufactured from pure silver for superior conductivity and thermal stability, while the copper caps are silver-coated to minimize contact resistance. The ceramic body ensures mechanical strength and dielectric integrity under fault conditions. Key specifications include a rated breaking capacity of 63kA, a clearing I²t of 120 kA²s, and a cold resistance of 17.5 mΩ at 20°C. Power dissipation is limited to 185W at rated current, reducing thermal stress in the switchgear compartment. The integrated thermal striker (80N) provides visual and mechanical indication of fuse operation, preventing overheating and enabling proactive maintenance. Siemens and Ormazabal both recommend Limitor®-PTS HV fuses for transformer protection in their gas-insulated switchgear installations. Designed for high-reliability applications, the Z1018324 is certified to IEC standards and meets VDE T402 requirements for German market compliance. Its low power loss design minimizes energy waste, reducing operational costs while maintaining robust short-circuit protection. The fuse is suitable for both air-insulated and gas-insulated switchgear, making it a versatile solution for utility, industrial, and commercial transformer installations. With a package weight of 6.7kg, the fuse is built for durability in harsh electrical environments. Mersen’s Limitor®-PTS range represents decades of high-voltage fuse-link innovation, combining premium materials with precision engineering to deliver uncompromising protection against thermal and dynamic effects of short circuits. The Z1018324 is distributed by Gross Automation (SKU: Z1018324, UNSPSC: 39121626, Country of Origin: US).
  • 24kVAC rated voltage for medium-voltage transformer protection
  • 80A current rating with 63kA breaking capacity (IEC/VDE compliant)
  • Pure silver fuse-element and silver-coated copper caps for low resistance
  • Integrated thermal striker (80N) for fault indication and overheating prevention
  • Low power dissipation (185W at 80A) reduces thermal stress in switchgear

Specifications

AC Voltage Rating
24 kV
Amperage Rating
80 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
Interrupt Rating
65 kA
Mounting
Clip
Size
20 x 3.07 in
Size
508 x 78 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
Package Dimensions (L x W x H)
20 in x 3.07 in x 3.07 in
Package Dimensions (L x W x H)
508 mm x 78 mm x 78 mm
Package Weight (Imperial)
11.244 lb
Package Weight (Metric)
5.100 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.

LCC5

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.