High-voltage fuses according to French standards

Product catalog summary

Introduction

The document presents technical data and application guidelines for HHF high-voltage, high-power fuse-links, specifically the HHF-B series. These fuse-links are designed for protection in high-voltage electrical systems, such as main transformers.

Application Range and Types

HHF fuse-links are constructed with elements wound on a star-shaped ceramic support to ensure reliable operation. They are available with or without temperature-limiting features and can be supplied with or without a striker pin (EDF version). The HHF-B series is detailed on page 136 and is rated for 24 kV systems.

Technical Specifications

Parameter	Value
Rated Voltage	24 kV
Length (L)	520 mm
Diameter (D)	55 mm
Rated Currents (A)	10, 20, 25, 28, 32, 43, 50, 63, 90, 112, 142, 194, 225 A (varies by model)
Rated Breaking Current (I1)	Ranges from 10 A to 50 A depending on fuse type
Pre-Arcing Integral (I2t)	From 45 to 44,000 A²s
Breaking Integral (2t)	From 154 to 9,800 A²s
Power Loss	Ranges from 1.1 W to 54 W
Cold Resistance	From 1.1 mΩ to 142 mΩ
Weight	Not explicitly specified

Standards and Norms

The fuse-links comply with international standards IEC 60282-1, UTE C64-210, and NF EN 60282-1, ensuring compatibility and safety in high-voltage applications.

Application Recommendations

HHF fuse-links are recommended for protecting main transformers in electrical networks. Their design ensures reliable interruption of fault currents while limiting thermal and mechanical stresses on the system.

Characteristic Curves and Performance

The document includes time-current characteristic curves illustrating the fuse operation under different prospective RMS currents. Virtual pre-arcing times and cut-off peak currents are provided to help engineers assess fuse performance during fault conditions.

Key performance highlights include:

Fast interruption times for rated currents ranging from 6.3 A to 50 A.
Capability to handle prospective short-circuit currents up to several kiloamperes.
Low power loss and cold resistance values to minimize energy dissipation and heating during normal operation.

Packing and Versions

HHF fuse-links are available in versions with or without striker pins, facilitating different installation and operational requirements.

Summary

The HHF high-voltage fuse-links, particularly the HHF-B series, provide robust and standardized solutions for protecting high-voltage electrical equipment. Their detailed technical parameters, compliance with international standards, and clear application recommendations make them suitable for reliable network transformer protection.

Catalog excerpts

High-voltage fuses according to French standards-1

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High-voltage fuses according to French standards-2

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High-voltage fuses according to French standards-3

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High-voltage fuses according to French standards-6

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