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Surge Arrester composite-housed TEXLIM

A high strength, composite-housed arrester family for line discharge class 3 to 5 and system voltage up to 800 kV

TEXLIM is family of composite-tube arresters of Hitachi Energy that offer an ideal alternative to traditional porcelain-housed arresters for protection against overvoltages. High mechanical strength in combination with the silicone housing, gives a good combination of performance.

TEXLIM arresters are type-tested according to IEC 60099-4 Ed-3 and ANSI/IEEE C62.11-2012.  They also comply with customer specific standards.
 

Applications

The TEXLIM family of surge arresters are designed to perform under severe environmental conditions. They are best suited for applications which have high mechanical strength demands, high seismic requirements or sea salt, soot or acid rain and other harsh environments. Applications include:

  • Protection of substation equipment 
  • Loads requiring high mechanical strength
  • Seismic areas
  • Polluted areas
  • Transformers and reactors
  • Capacitor banks
  • HVDC protection

Why Hitachi Energy?
 

  • Minimum maintenance cost
  • Customizable mechanical and electrical design
  • Easy to install
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Brief performance data

    Q-C P-C T-C
System voltage  kV  123 - 420 245 - 550 245 - 800
Rated voltage kV 90 - 420  180 - 444  180 - 624 
Arrester classification IEC kApeak 10 20  20 
Line discharge class IEC Class 3  4 5
Arrester classification IEEE/ANSI kApeak 10  10/15  10/15/20
Mechanical strength (SSL)        
 - Specified long term load (SLL)  Nm 21000  21000  21000 
 - Specified short term load (SSL)  Nm 40000  40000  40000 

Get to know more

The most important component for the surge arresters is the ZnO blocks, the varistors. Stacked in the center of the surge arrester, the varistor is the heart of the surge arrester. The varistor consist of a mix of zink oxide and other metallic powders that are blended and pressed into cylindrical blocks.

Hitachi Energy manufactures ZnO varistors with full control of the process from the raw material to the finished electrically characterized varistors. A high degree of automation and a large number of quality tests at all stages, from raw material to ZnO blocks, approved for arrester manufacture, ensure that they fulfil their stated data.

Type tests has been performed for every size of ZnO varistor. Each varistor is verified by rigorous testing – over and above both IEC & ANSI standard requirements:

Tests on ZnO blocks

Energy withstand test on all blocks - The blocks pass three energy test cycles with cooling in-between. In each cycle, the injected energy is far in excess of the single impulse energy capability. Blocks with insufficient energy capability are automatically rejected.

Classification of all blocks

The blocks are classified at 1 mA (d.c.) and 10 kA (8/20 μs) and the residual voltages are printed on each block together with a batch identification. Finally all blocks are visually inspected.

Accelerated life tests on samples

Power losses after 1 000 hours calculated from a test with shorter duration (approximately 300 hours) at an elevated temperature of 115 °C at 1.05 times Uc shall not exceed the losses at start of the test. Batches in which unapproved blocks appear are rejected.

Impulse current tests on samples

Blocks are subjected to high current impulses (4/10 μs) and long duration current impulses (2 500 μs) of amplitudes verifying catalogue data.

Read more about the testing of ZnO blocks here (link to pdf-file)