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Low-Voltage Fuses

Low-Voltage Fuses
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Low-Voltage Fuses

Product catalog summary
Foreword
This document highlights the critical role of proper fuse protection in switchgear to prevent downtime and business losses. SIBA NH fuse links are emphasized for their effectiveness in protecting networks, transformers, motor circuits, and mining systems. The company offers both standard and custom solutions to meet diverse protection needs.
General Information
SIBA has developed a wide range of low-voltage fuses over the years, ensuring reliable protection for various applications. The company is committed to customer service, technical support, and has a global distribution network. A disclaimer notes that while SIBA provides reliable components, the overall system safety is the responsibility of the machine or installation manufacturer.
Technical Explanations
The document discusses the need for high operational safety in low-voltage networks, requiring high-quality protective devices. SIBA NH fuse links are designed to protect against both minor overcurrents and major short-circuit currents. They feature a selective fuse element welded to knife contacts and a ceramic insulating body for reliable operation.
Product Overview
The catalogue details specifications for various NH fuse links, including rated voltage, class, size, and current ratings, covering voltages from 400V to 1500V and classes such as gG, gTr, aM, and gTF. It also lists fuse bases and switches with page references for easy access.
Technical Variables
Technical data is based on tests conducted according to national or international standards at ambient temperatures of 20-25°C with new fuses under no pre-load conditions. The document also discusses current limitation and other technical aspects of fuse performance.
Introduction
The document addresses the dynamic and thermal strength of electrical components, determined by the peak value of a potential short-circuit current. It emphasizes reliability and economic utilization in low voltage networks, highlighting SIBA LV fuse links' role in providing efficient and reliable protection.
General and Design
SIBA LV fuse links are designed for maximum protection against faults, covering a range of overcurrents and short circuit currents. They include selective fuse elements connected to knife contacts, with high-quality ceramic bodies ensuring faultless operations.
Technical Data and Explanations
Technical data is based on tests according to national and international standards. The document explains the current limiting capabilities of SIBA LV fuse links, effectively limiting high short circuit currents. Time-current characteristics are provided, showing medium characteristics curves within the cutoff range stipulated by VDE 0636-2.
Application Range and Benefits
SIBA LV fuse links are available in various voltage ratings and operating classes, with a high interrupting rating up to 120 kA. They are characterized by low power loss and corrosion resistance, suitable for full range and backup protection in applications such as general, mining, motor circuit, and transformer protection.
Standards and Compliance
The LV fuses comply with standards such as IEC 60269-1 and -2, EN 60269-1 and -2, VDE 0636, and DIN 43620. They are available in sizes ranging from 000 to 4a, with rated voltages from 400 VAC to 1500 VAC.
Operating Classes
  • gG: Protects cables, wires, and facilities, ensuring low power loss.
  • aM: Suitable for protecting switchgear in motor feeders, preventing contact welding during short circuits.
  • gTr: Adapted to transformer load characteristics, allowing better utilization of transformer overload capacity.
  • gB: Developed for underground mining installations, considering specific operational and safety conditions.
Time-Current Characteristics
The document includes time-current characteristics and diagrams illustrating the relationship between prospective short-circuit current and cut-off current, demonstrating the efficiency of SIBA LV fuse links in limiting current peaks.
Specifications
The document provides detailed specifications for NH fuse-links used in electrical systems. The rated voltage for these fuse-links is 690 V, available in sizes NH 000 to NH 4a, with rated currents from 16 A to 1000 A.
Procedures
Outlines power loss, weight, rated breaking capacity, pre-arcing i2t value, and total i2t value for each fuse-link size and current rating, crucial for ensuring correct application and safety.
Standards
The fuse-links conform to IEC 60269-2 and VDE 0636 Teil 2 standards, ensuring international safety and performance compliance.
Recommendations
For optimal performance, select the appropriate fuse-link size and current rating based on specific electrical system requirements. Time-current characteristics graphs aid in this selection process.
Key Data from Tables and Graphs
Tables provide detailed data on power loss, weight, and i2t values for each fuse-link size and current rating. Graphs illustrate time-current characteristics, showing the relationship between prospective short-circuit current and cut-off current for different fuse-link ratings.
Critical Information
Adhering to rated breaking capacity and i2t values is critical to prevent electrical failures and ensure safety. The document emphasizes using the correct fuse-link for transformer protection, with specific data for transformer-rated capacities from 315 kVA to 630 kVA.
Overview
This document is a technical catalog from SIBA GmbH, detailing specifications for NH fuse-links and fuse-bases, including rated voltage, current, power loss, weight, breaking capacity, and time-current characteristics for various models.
Fuse-Links Specifications
  • Class: gTF
  • Rated Voltage: 1200V, 1500V
  • Rated Current Range: 6A to 400A
  • Power Loss: Varies by model, e.g., 2.5W for 10A, 41W for 400A
  • Weight: Typically 1.30 kg per piece
  • Breaking Capacity: 25 kA
  • Pre-Arcing i2t-Value: Ranges from 40 A2s to 973,000 A2s
  • Total i2t-Value: Ranges from 160 A2s to 3,894,000 A2s
Fuse-Bases Specifications
  • Rated Voltage: 690V
  • Rated Current: Up to 250A
  • Protection Class: IP 30
  • Assembly: Direct or mounting rail
  • Materials: Includes transparent covers, silver-plated copper contacts, and flexible cables
Time-Current Characteristics
The document includes graphs showing the time-current characteristics for different fuse ratings, indicating the cut-off current and prospective short-circuit current.
Additional Features
Some models include a remote indicator for monitoring purposes.
Packaging
Fuse-links are typically packed in single or double pieces, while fuse-bases are packed in larger quantities, such as 100 pieces.
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Catalog excerpts

Low-Voltage Fuses-1

NiederspannungsHochleistungs-Sicherungen Low-Voltage Fuses Katalog 2012 Catalogue 2012 Sie protieren. Mit Sicherheit. Our Protection. Your Benet.

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Low-Voltage Fuses-2

Vorwort / Foreword Das Team / The team Rüdiger Genz, Rita Rehfuss, Olaf Bütterling, Anja Lueg, Ingrid Bieber, Joachim Skock, Karin Betz, Volker Liefke, Maike Bichler und Johannes-Georg Gödeke (von links / from left) Optimaler Schutz für Netz und Anlage Optimum protection for mains and equipment Eine Schaltanlage, die nicht richtig abgesichert ist, fällt bei einem Schaden womöglich länger aus. Das wird dann sehr schnell sehr teuer. Und selbst wenn Versicherungen für den Schaden aufkommen: Vielleicht ist ein Auftrag dann endgültig weg, und den Ärger und die Mühe zahlt einem niemand. So gesehen,...

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Low-Voltage Fuses-3

Allgemeine Informationen / General Information Inhalt / Contents NH-Ubersicht / LV-Overview Allgemeine Informationen / General Information Technische Erlauterungen / Technical Notes Sicherungseinsatze / Fuse-Links NH-GLMeldeschalter / Switch NH-GL 250 V Meldeschalter 250 V / Switch 250 V Trennmesser/ Knife-Links NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected] ^

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Low-Voltage Fuses-4

NH-Übersichten / LV-Overviews Produkt-Übersicht / Product List Produktgruppe Product Group Betriebsklasse Größe Rated Current Standard Standard ISOMET ISOMET – – – – – ISOMET – – – ISOMET Wetterfest / Weatherproof Wetterfest / Weatherproof – – ISOMET – – – – – – Standard ISOMET ISOMET – – – – ISOMET ISOMET – – Bergbau / Mining – – Bergbau / Mining Bergbau / Mining – – Bergbau / Mining Bergbau / Mining Bergbau / Mining Bergbau / Mining – – 4 NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected]

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Low-Voltage Fuses-5

NH-Übersichten / LV-Overviews Produktgruppe Product Group Bemessungsspannung Rated Voltage Betriebsklasse Größe Rated Current 5 NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected]

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Low-Voltage Fuses-6

NH-Übersichten / LV-Overviews NiederspannungsSicherungen Low-Voltage-Fuses Sicherungseinsätze Fuse-Links Sicherungsunterteile Fuse-Bases ab Seite | from page 16 ab Seite | from page 120 Betriebsklasse / Class Betriebsklasse / Class Betriebsklasse / Class ab Seite | from page 144 Meldeschalter Switch Betriebsklasse / Class Betriebsklasse / Class Betriebsklasse / Class 6 NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected]

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Low-Voltage Fuses-7

Allgemeine Informationen / General Information Allgemeine Informationen / General Information 1 Niederspannungssicherungen von SIBA / Low-Voltage Fuses made by SIBA 2 Allgemeines, Aufbau / General, Design 3 Technische Größen / Technical Variables 4 Anwendungshinweise / Application Guide 5 Selektivitätsanforderungen / Discrimination requirements 7 NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected]

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Low-Voltage Fuses-8

Allgemeine Informationen / General Information Technische Erläuterungen / Technical Explanations 1 Niederspannungs-Sicherungen von SIBA 1 Low Voltage Fuses made by SIBA Über Jahrzehnte entwickelte SIBA ein umfassendes internationales Produktsortiment an Niederspannungs-Sicherungen für jede erdenkliche Anwendung. So können wir Ihre Produkte zuverlässig schützen und damit Ihre wirtschaftliche Grundlage sichern. „Sie protieren. Mit Sicherheit“ ist unser Motto. Ihr Nutzen steht im Vordergrund. Unsere Kundenorientierung zeigt sich in der Konstruktionsqualität unserer Sicherungen und in unserer weltweit...

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Low-Voltage Fuses-9

Allgemeine Informationen / General Information Die Forderung der Anwender nach größtmöglicher Betriebssicherheit in Niederspannungsnetzen, verbunden mit deren effektiven, ökonomischen Ausnutzung, stellt erhebliche Anforderungen an die Qualität der Schutzorgane in diesen Netzen. The user‘s request for a maximum of reliability of service in low voltage networks, coupled with their effective and economic utilization, asks for considerable qualtiy requirements of the protective gear in these networks. Die fortwährende Verbesserung an Geräten zum Schutz von Leitungsnetzen, insbesondere die ständige...

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Low-Voltage Fuses-10

Allgemeine Informationen / General Information Hohe Kurzschlussströme steigen bei Verwendung von SIBA-NH-Sicherungseinsätzen entsprechender Bemessungsstromstärken nicht mehr bis zu ihrem Scheitelwert an, sondern sie werden bereits im Anstieg der ersten Halbwelle wirksam begrenzt. High short circuit currents do not rise up to their peak value when SIBA LV fuse links of corresponding rated current are used, but their increase is al ready limited. Der Zusammenhang zwischen dem prospektiven Kurzschlussstrom Ip und der wirksamen Strombegrenzung (Durchlassstrom iD) durch die SIBA-NH-Sicherungseinsätze...

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Low-Voltage Fuses-11

Allgemeine Informationen / General Information 11 NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected]

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Low-Voltage Fuses-12

Allgemeine Informationen / General Information 12 NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected]

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Low-Voltage Fuses-13

NH-Sicherungen nach europäischer Norm / Fuses acc. European Standard NH-Sicherungen Niederspannungs-Sicherungen mit Messerkontakten nach europäischen Normen Low Voltage Fuses European NH Knife-Blade Fuse System Einleitung / Introduction Technische Daten / Technical Data Technische Daten Sicherungs-Unterteile / Technical Data Fuse-Bases 13 NH-Katalog / LV-Catalogue © 2012-06 SIBA GmbH • www.siba.de • [email protected]

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Low-Voltage Fuses-14

NH-Sicherungen nach europäischer Norm / Fuses acc. European Standard NH-Sicherungen Niederspannungs-Sicherungen mit Messerkontakten nach europäischen Normen Low Voltage Fuses European NH Knife-Blade Fuse System Einleitung Introduction Einsatzgebiete, Betriebsklassen Application range, Benets Features of the LV Fuses with european NH Knife-Blade Fuse System SIBA NH-Sicherungseinsätze mit Klapp- oder Kombimelder stehen in einer großen Bandbreite von Größen, Bemessungsspannungen und Betriebsklassen zur Verfügung. Das hohe Ausschaltvermögen der Sicherungen reicht bis zu 120 kA. Dank Kombimeldern...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.