High-voltage fuses according to German standards

Product catalog summary

Introduction

This document provides an in-depth technical overview of SIBA's HHD series high-voltage, high-performance fuses designed primarily for protection of transformers, capacitors, motor circuits, and voltage transformers. It covers product variants, technical specifications, performance characteristics, standards compliance, accessories, and application guidelines.

1. Product Series and Application Areas

HHD-B Series: Main series focused on transformer and capacitor short-circuit protection.
HHD-BSSK Series: Designed for use with load and fuse switches under specific conditions.
HHD-G Series: Suitable for short-circuit and limited overload protection.
HHD-BM Series: Intended for motor circuit protection.
HHD-BR and HHD-BVT Series: For potential transformer and voltage transformer circuit protection.

2. Technical Specifications

Comprehensive tables detail electrical and physical parameters across fuse types and voltage classes:

Rated Current: From 0.5 A up to 500 A depending on series and application.
Rated Voltage: Covers ranges from 3 kV up to 40.5 kV, including common classes like 3/7.2 kV, 6/12 kV, 10/17.5 kV, 10/24 kV, 20/36 kV, and higher.
Physical Dimensions: Standard lengths of 192 mm, 292 mm, and 442 mm with typical diameter of 85 mm.
Breaking Capacity: High interrupting currents up to several million amperes (e.g., 4,500,000 A) ensuring safe fault clearing.
Energy Let-Through (I2t): Pre-arcing and total clearing integral values provided, critical for coordination and system protection.
Power Loss and Cold Resistance: Specified for each fuse rating to assess operational efficiency and thermal behavior.
Weight: Provided for handling and installation considerations.

3. Performance Characteristics

Time-current characteristic curves illustrate fuse response under prospective short-circuit currents, showing virtual pre-arcing and melting times versus RMS current. These curves are essential for protection coordination and ensuring reliable operation during faults. Cut-off peak current and prospective short-circuit current values demonstrate fuse interruption capabilities.

4. Standards and Compliance

IEC 60282-1: International standard for high-voltage fuses.
DIN 43 625: German standard for fuse links.
VDE 0670-4: German electrical safety standard.
IEC 60644: Standard for low-voltage fuses (applicable to some variants).
ANSI C37.46: American standard for current-limiting fuses.

Compliance ensures reliability, safety, and interoperability in electrical networks.

5. Accessories and Additional Components

Fuse bases and holders compatible with HHD series fuses.
Striker pins (80N force) available for triggering mechanical releases.
Temperature limiters and adapters to convert fuse lengths (e.g., from 192 mm to 292 mm or 442 mm).
HV fuse caps, spring clip contacts, and flexible Bowden cables (typically 250 mm length) for monitoring and mechanical integration.

6. Application Recommendations

Select fuse ratings considering rated current, voltage, and breaking capacity to match system requirements.
Use time-current characteristic curves to ensure proper coordination with downstream equipment and protection schemes.
Consider power loss and cold resistance values for thermal management and efficiency.
Ensure correct fuse dimensions and packaging (with or without striker pins) for compatibility with switchgear and fuse holders.
Adapters and accessories facilitate installation and testing in medium voltage switchgear environments.

7. Variants and Special Designs

The document distinguishes between standard and variant fuse dimensions, offering flexibility to meet specific network requirements. Special designs accommodate higher voltage ratings and unique application needs, with corresponding adjustments in electrical and mechanical parameters.

8. Summary and Critical Information

Rated currents range from 0.5 A to 500 A; rated voltages up to 40.5 kV.
Physical dimensions mainly include lengths of 192 mm, 292 mm, and 442 mm with 85 mm diameter.
Time-current characteristics provide essential data for protection coordination, showing melting and pre-arcing times versus prospective short-circuit currents.
Energy let-through (I2t) and power loss data support system design and efficiency analysis.
Compliance with IEC, DIN, VDE, IEC 60644, and ANSI standards ensures quality and safety.
Accessories and adapters enhance installation flexibility and operational safety.

Conclusion

This document serves as a comprehensive technical reference for engineers and technicians involved in specifying, installing, and maintaining high-voltage fuse protection systems. It provides detailed product data, performance curves, standards compliance, and application guidance to ensure safe, reliable, and efficient operation of SIBA's HHD high-voltage fuse series in medium voltage electrical networks.

Catalog excerpts

High-voltage fuses according to German standards-1

siba_HH_Katalog_Skock.pdf table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Times New Roman", serif; } HD-Sicherungen nach DIN Standard / Fuses acc, DIN Standard [3|py\) Sicherungen | Fuses HHD-Sicherungen Hochspannungs-Hochleistungs-Sicherungen nach DIN 43 625 HHD Fuses High-Voltage Fuses acc. DIN 43 625 Einleitung / Introduction Technische Daten nach Baureihen / Technical Data Types of Fuses Technische Daten Sicherungs-Unterteile / Technical Data Fuse Bases Zubehr / Accessories Anwendungsempfehlungen / Application Guide Transformatorschutz / Protection of Transformers Kondensatorschutz / Protection of Capacitors Schutz von Motorkreisen / Protection of Motor Circuits 27 HH-Katalog / HV-Catalogue © 2009-09 SIBA GmbH & Co. KG www.siba.de 䕕 [email protected] ^

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High-voltage fuses according to German standards-2

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High-voltage fuses according to German standards-3

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High-voltage fuses according to German standards-4

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High-voltage fuses according to German standards-5

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High-voltage fuses according to German standards-7

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High-voltage fuses according to German standards-9

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High-voltage fuses according to German standards-11

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High-voltage fuses according to German standards-13

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