Mersen F215032 - The NH system is classified among plug-in fuse systems and is composed of: • fuse-base, (possibly including terminal covers and phase barriers) • fuse-link with blade contact • fuse-link replacement device (LV HRC fuse puller) Since the design of this system cannot guarantee non-interchangeability of rated current, it must be handled by a qualified professional. NH-fuse links „gTr“ are used for the protection of transformers. The time/current characteristic is especially adapted to that of the protected transformer and implies optimal selectivity to NH-fuse links characteristic gG. The fuses can be loaded with 1×3 times nominal current for up to 10 hours. The fuse link operates at 1×5 times nominal transformer current within 2 hours. 400 Volts 250 kVA gTR NH4a series.
Mersen

F215032

Alternate Item Number: 4086500032600

Contact for Pricing

Overview

The Mersen NH4a gTR fuse link (SKU F215032) is engineered for the specialized protection of industrial transformers. As a key component of the Mersen NH plug-in fuse system, it safeguards transformers against overcurrents and short circuits, ensuring operational continuity and preventing costly damage. The NH system comprises a fuse base, optional terminal covers and phase barriers, a fuse link with blade contacts, and a dedicated fuse link replacement device (LV HRC fuse puller). Due to the system's design, which does not guarantee non-interchangeability of rated current, installation and handling must be performed by qualified electrical professionals. The "gTr" classification signifies this fuse link's dedicated application for transformer protection. Its time/current characteristic is precisely adapted to the thermal behavior of protected transformers, offering optimal selectivity over standard NH gG fuse links. This ensures that in a fault scenario, only the affected circuit is isolated, minimizing disruption to the broader electrical network. The Mersen NH4a gTR fuse link is rated for 400 Volts and is suitable for transformers up to 250 kVA. It offers substantial overload capability, tolerating up to 1x3 times the nominal current for up to 10 hours. For more critical overloads, it operates decisively at 1x5 times the nominal transformer current within a two-hour window, providing rapid protection against conditions that could lead to transformer overheating and failure. Mersen's commitment to quality and reliability underpins the performance and safety of this essential protective device.
  • Specifically designed for transformer protection with 'gTr' classification
  • 400 Volt rating, suitable for transformers up to 250 kVA
  • Handles 1x3 nominal current for up to 10 hours
  • Operates at 1x5 nominal transformer current within 2 hours
  • Ensures optimal selectivity with NH gG fuse links

Specifications

Application
gTR: Transformer purpose (protection of transformers)
Brand Name
Ferraz Shawmut
Connection
Blade
Current Rating
250 kVA
Interrupt Rating
120 kA
Mounting
Clip
Series
NH4a gTR
Special Features
Maximum transformer capacity (up to 1·3 x lrat) Reduction of unnecessary interruption of operation Precise cut off of overload Characteristic adapted to the transformer Resistant to ageing Selectivity to fuse links gG High current limiting High cut off capacity Easy selection between transformer and fuse link
Type
IEC NH Fuse-Links
Voltage Rating
400 VAC
Package Dimensions (L x W x H)
8.86 IN x 5.51 IN x 3.94 IN
Package Dimensions (L x W x H)
22.5044 cm x 13.9954 cm x 10.0076 cm
Package Weight (Imperial)
5.040 L
Package Weight (Metric)
2.286 kg
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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.