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Organisations concerned with testing high voltage electrical power equipment shall be eligible for membership and shall have at least one test facility available for direct short-circuit testing at 500 MVA, 3 phase as a minimum. Each organisation shall be widely recognised as a competent testing organisation independent of particular manufacturer or user interests and that it can actively participate in the work of STL.
There shall be only one member or applicant per country or group of countries.

Members of STL are:

Intertek (ASTA), UK
CESI, Italy
CPRI, India
ESEF ASEFA, France
JSTC, Japan
KEMA, The Netherlands
KERI, South Korea
PEHLA, Germany
SATS, Norway
STLNA, USA
VEIKI, Hungary
ZKU, Czech Republic


For more information about the member: click on the member-logo.


Data according to STL Membership Directory issue 48 dated 2021-05-04