IP Ratings (Degrees of Ingress Protection)
 Circuit Breaker Protection
 RCD's and Modular Contactors
 Circuit Breaker Data
 HRC Fuselink Protection
 Selecting the Correct Motor Starter
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IP Ratings (Degrees of Ingress Protection)
The IP (Ingress Protection) rating system provides a means of classifying the degrees of protection from foreign bodies and liquids afforded by electrical equipment and enclosures.
The system is set in a number of British and European standards. These include BS EN 60529:1992 (IEC 60529:1989) Classification of Degrees of Protection by enclosures, BS 60947-1:1992 (IEC 144:1963) Specification for Degrees of Protection of Enclosures of Switchgear and Control Gear for Voltages up to and Including 1000V AC and 1200V DC.

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Circuit Breaker Protection
Highly detailed information regarding the protection of circuits using circuit breakers.
  • Protection of cables
  • Types of discrimination
  • Back-up protection
  • Fuse data for back-up
  • Prospective fault current
  • Current discrimination
  • Prospective fault level to which back-up is achieved
  • Thermal de-rating
  • Protecting lighting circuits with MCBs
  • D.C. applications of MCBs and MCCBs
  • Motor circuit protection
  • Transformer protection

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RCDs and Modular Contactors
Details of trip current ratings, RCD applications, trouble shooting, shock hazard information and modular contactors.
  • RCD selection criteria & operating principles
  • Operating characteristics
  • Shock hazard curves
  • RCD trouble shooting
  • Causes of spasmodic tripping
  • Modular contactors

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Circuit Breaker Data
Maximum earth loop impedance, disconnection time/current data and maximum let through energy data for MCBs and MCCBs.
  • Maximum earth loop impedance Zs (OHMS)
  • Disconnection time/current data
  • Maximum let through energy

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HRC Fuselink Protection
The leading edge of HRC fuselink design. Describes in detail everything you would need to know about using Eaton MEM HRC fuselinks.
  • Features
  • Cable protection
  • Protection against electric shock
  • High ambient air temperature
  • Transformer, fluorescent lighting circuits
  • Capacitor circuits
  • Discrimination between fuselinks
  • Back-up protection
  • Motor circuit protection
  • Co-ordination with short circuit protective devices
  • Type 2 co-ordination

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Selecting the Correct Motor Starter
Ratings from 16A up to 1600A covering 2 pole up to 8 pole versions, with a choice of enclosures to suit any application.
  • A choice of enclosures
  • Ratings from 16A to 1600A
  • Ingress protection IP52/65
  • Comply with BS EN 60947 and IEC 60408

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