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High-voltage fuses according to American standards (HHA)

High-voltage fuses according to American standards (HHA)

Product catalog summary

Introduction

The HHA series of high-voltage, high-performance fuse-links are specifically designed for indoor protection of capacitor circuits. The HHA-BC fuse-links are tailored to safeguard capacitor banks, ensuring reliable operation and protection against overcurrents.

Technical Specifications and Application Range

The fuses are rated according to IEC 60282-1 standards and are available for various rated voltages including 4.8 kV, 5.5 kV, 7.2 kV, 8.3 kV, 15.5 kV, and 23 kV. Each fuse type is characterized by specific rated currents, dimensions, and performance parameters.

Rated Current and Voltage

Rated currents range from 6.3 A up to 250 A depending on the fuse type and application.
Rated voltages cover a broad spectrum from 4.8 kV to 23 kV to suit different capacitor circuit requirements.

Physical Characteristics

Fuse-links feature both ends threaded or bolt tap contacts for secure installation.
Dimensions such as length (typically 254 mm to 420 mm) and diameter (around 42.5 mm to 44 mm) vary by fuse model.

Performance Parameters

Key electrical and thermal parameters are provided for each fuse type, including:

Pre-Arcing I²t Value: Indicates the energy let-through before the fuse element melts, critical for protecting capacitors from transient currents.
Clearing I²t Value: Represents the total energy let-through during fault clearing.
Power Loss: The continuous power dissipation in watts, important for thermal management.

For example, at 4.8 kV, a 45 A fuse has a pre-arcing I²t of 10,500 A²s, clearing I²t of 250,000 A²s, and power loss of 19 W.

Time-Current Characteristics

The fuse-links exhibit defined time-current curves showing virtual melting time and pre-arcing time against prospective short-circuit currents (symmetrical RMS). These curves demonstrate the fuse's ability to interrupt fault currents rapidly while allowing normal operating currents to pass uninterrupted.

Typical characteristics include:

Cut-off peak current values indicating the maximum instantaneous current the fuse can interrupt.
Virtual melting times decreasing with increasing prospective current, ensuring fast response to high fault currents.

Standards and Compliance

All fuse-links comply with IEC 60282-1, ensuring international standardization for high-voltage fuse performance and safety.

Packaging and Installation

Fuses are supplied with appropriate packaging and feature installation options such as threaded ends or bolt tap contacts on one or both ends, facilitating integration into capacitor banks and switchgear.

Summary of Critical Information

Application: Protection of indoor capacitor circuits.
Voltage Ratings: 4.8 kV to 23 kV.
Current Ratings: 6.3 A to 250 A.
Standards: IEC 60282-1 compliant.
Performance: Detailed I²t values and power loss data for precise selection.
Installation: Threaded or bolt tap contacts for secure mounting.

This comprehensive data enables engineers to select appropriate HHA-BC fuse-links for reliable capacitor protection, balancing fast fault clearing with minimal impact on normal operation.

Catalog excerpts

High-voltage fuses according to American standards (HHA)-1

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Arial", sans-serif; } .font1 { font:26.00pt "Arial", sans-serif; } .font2 { font:23.00pt "Arial Black", sans-serif; } .font3 { font:11.00pt "Impact", sans-serif; } .font4 { font:13.00pt "Impact", sans-serif; } .font5 { font:34.00pt "Impact", sans-serif; } .font6 { font:18.00pt "Lucida Sans Unicode", sans-serif; } HHA-Sicherunqseinsatze: US-Standard/Fuse-Links: US Standard [SIBA] H H A-5icherungseinstze Hochspannungs-Hochleistungs-Sicherungseinstze, US-Standard H HA Fuse-Links High-Voltage Fuse-Links, US Standard Einleitung / introduction TechmsclioDaten nach Baureihen/Technical Data Types of Fuses 139 HH-Katalog/ HV-Catatogue o 2009-09 SIBA GmbH & Co.KG ■ www.slba.de ⠕ [email protected]

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High-voltage fuses according to American standards (HHA)-2

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High-voltage fuses according to American standards (HHA)-3

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High-voltage fuses according to American standards (HHA)-5

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High-voltage fuses according to American standards (HHA)-7

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High-voltage fuses according to American standards (HHA)-9

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High-voltage fuses according to American standards (HHA)-11

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High-voltage fuses according to American standards (HHA)-13

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High-voltage fuses according to American standards (HHA)-15

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High-voltage fuses according to American standards (HHA)-17

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