ELDON launches new POWER & DISTRIBUTION SYSTEM at Hannover Messe, April 2008

•  EN 60439-1, Scope and object:
  This standard applies to low-voltage switchgear and controlgear assemblies (Type Tested Assemblies, and Partially Type Tested Assemblies).
  - Rated voltage up to 1000 Vac with frequencies up to 1000 Hz.
  - Rated voltage up to 1500 Vdc.
  
  The object of the standard is to lay down the definitions and to state the necessary compliance for low-voltage switchgear and controlgear assemblies:
  - Service conditions.
  - Constructions requirements.
  - Technical characteristics.
  - Tests to be carried out.
  
  
• Low-voltage switchgear and controlgear assembly:
  Combination of one or more low-voltage switching devices together with associated control, measuring, signalling, protective, completely assembled under the responsibility of the manufacturer with all the internal electrical and mechanical interconnections and structural parts.
  
  
• TTA, Type-tested assembly:
  Assembly conforming to an established type or system without deviations likely to significantly influence the performance, from the typical assembly verified to be in accordance with this standard.
  
• PTTA, Partially type-tested assembly:
  Assembly containing both type-tested and non-type-tested arrangements, provided that the latter are derived (e.g. by calculation) from type-tested arrangements which have complied with the tests.
  
• Electrical characteristics of assemblies, Voltage values:
  
  Rated operational voltage, Ue:
  - Value of voltage which, combined with the rated current, determines its application. Between phases in polyphase systems.
  - EPS has been tested up to 660 V.
  
  Rated insulation voltage, Ui:
  - Voltage value to which dielectric test voltages and creepage distances are referred. Between phases in polyphase systems.
  - EPS has been tested up to 660 V.
  
  Rated impulse withstand voltage, Uimp:
  - Peak value of an impulse voltage of a prescribed form and polarity which the circuit is capable of withstanding without failure under specific conditions of test and to which the values of the clearance are referred.
  - EPS has been tested up to 4000 V.
  
• Electrical characteristics of assemblies, Current values:
  
  Rated current, In:
  - Value stated taking into consideration the ratings of the components of the electrical equipment, their disposition and applications. Temperature-rise must be taken in consideration too.
  - EPS has been tested up to 5000 A.
  
  Rated conditional short-circuit current, Icc:
  - Value of prospective short-circuit current which a circuit, protected by a device, can withstand satisfactorily for the operating time of the device.
  - EPS has been tested up to 85 kA.
  
  Rated peak withstand current, Ipk:
  - Value of peak current which the circuit can withstand satisfactorily.
  - EPS has been tested up to 187 kA.
  
• The Eldon Power System is available as:
  - Form 1, without any segregation.
  - Form 2, segregation between functional units and the busbar.
  - Form 3, segregation between functional units each other, and with the busbar.
  - Form 4, segregation between functional units and the outgoing terminals each other, and with the busbar.

 
       

•   The tests to verify the characteristics of an assembly include:
  
  Type tests.
  - Type tests are intended to verify compliance with the requirements laid down in this standard for a given type of assembly.
  - Type tests will be carried out on a sample of such as assembly, or on such parts of assemblies manufactured to the same or a similar design.
  
  Routine tests.
  - Routine tests are intended to detect faults in materials and workmanship.
  - These tests are carried out on every new assembly after it has been assembled.
  
  
• The main advantages of The Eldon Power System are:
  
  1. EPS is a Type Tested Assembly
  
  2. You are able to manufacture partially type-tested assemblies by meeting the following conditions:
      - The switching devices and components incorporated in the assembly shall comply with the relevant IEC standards, and should be suitable for the particular application with respect to the external design, electrical values, installation, etc.
      - Electrical connections inside the assembly must comply with the EN 60439-1 7.8.
  
  3. When the customer builds a EPS assembly, it is not necessary to carry out the type tests, the customer only needs to carry out the routine tests.