Mersen H201694 - 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. 500 Volts 1000 amps gG NH4 series.
Mersen

H201694

Alternate Item Number: 4086500032150

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Overview

The Mersen NH4 Series NH Fuse Link, SKU H201694, is engineered for critical transformer protection within industrial electrical systems. This gG-rated fuse link operates at 500 Volts and 1000 Amps, featuring a time/current characteristic specifically adapted for transformers, ensuring optimal selectivity compared to standard gG fuse links. Its design allows for temporary loading up to 3 times the nominal current for up to 10 hours, and it is designed to operate at 5 times the nominal transformer current within a 2-hour timeframe. This NH fuse link is part of the Mersen NH plug-in fuse system, which comprises a fuse base, the fuse link with blade contact, and a dedicated fuse link replacement device (LV HRC fuse puller). Due to the design's inability to guarantee non-interchangeability of rated current, handling by a qualified professional is mandatory. The NH4 series fuse links are manufactured in the US and adhere to IEC standards, providing reliable and precise protection for transformers in demanding applications. Key specifications include a 500V rating, 1000A current rating, and gG classification, making it suitable for applications requiring robust and dependable transformer safeguarding. The product's catalog description highlights its role in protecting transformers with a specialized time/current curve for enhanced selectivity and operational flexibility under load.
  • Designed for optimal transformer protection with specialized gTr time/current characteristic.
  • 500 Volts, 1000 Amps, gG classification for industrial applications.
  • Handles up to 3x nominal current for 10 hours; operates at 5x nominal transformer current within 2 hours.
  • Part of the Mersen NH plug-in fuse system, requiring qualified professional handling.
  • Manufactured in the US, adhering to IEC standards for reliable performance.

Specifications

Amperage Rating
1000 A
Application
gG: General purpose (protection of cables and LV-networks)
Brand Name
Ferraz Shawmut
Connection
Blade
Connection Type
Blade Contact
Current Rating
1000 A
Interrupt Rating
120 kA
Mounting
Clip
Mounting Type
Plug-in
Series
NH
Size
NH4
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
Standard
IEC/EN 60269-1 and -2 VDE 0636 Part 201
Type
IEC NH Fuse-Links
Voltage Rating
500 VAC
Voltage Rating
500 V V
Package Dimensions (L x W x H)
9.06 IN x 6.3 IN x 4.33 IN
Package Dimensions (L x W x H)
23.0124 cm x 16.002 cm x 10.9982 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.