Gesellschaft für elektrische Hochleistungs­prüfungen Member of Short-Circuit Testing Liaison (STL)

Requirements

Requirements for proof of conformity

Depending on the type of certificate, the manufacturer's proof of conformity must meet the following requirements.

Proof of conformity of the type tests

For tests of the main circuits, test certificates of the following laboratories are accepted:

  • STL member laboratories and accredited according to ISO/IEC 17025,
  • european non-manufacturing laboratories not belonging to the STL and accredited according to ISO/IEC 17025,
  • european manufacturer laboratories accredited according to ISO/IEC 17025, with observation by an inspector. The inspector must come from an ISO/IEC 17020 accredited inspection body that is independent of the test laboratory and the customer's company group. This inspection body must belong to a STL member,
  • non-European ISO/IEC 17025 accredited manufacturing laboratories, with observation by a PEHLA I&S inspector; the accreditation body of non-European ISO/IEC 17025 accredited manufacturing laboratories must be a member of the International Laboratories Accreditation Council (ILAC).

For type tests that do not affect the main circuit, testing in an European test laboratory accredited to ISO/IEC 17025 is sufficient. These tests include, for example:

  • tests on auxiliary circuits,
  • pressure tests,
  • burst tests (if applicable),
  • degree of protection tests,
  • kinematic chains,
  • interlocks,
  • EMC tests,
  • vibration and earthquake testss.

PEHLA ZERT decides on the recognition of such tests, as well as other type test certificates from non-European testing laboratories (e.g. state testing institutes) which are preferably accredited according to ISO/IEC 17025.

The type test certificates must:

  • fully document the type test requirements of the reference standards and, where available, comply with the provisions of the STL Guides,
  • apply to a uniform identity of the type-tested objects,
  • confirm the standard-compliant design values specified in the certificate.

Type tests which, according to the standard, are only to be performed by agreement between the manufacturer and the end customer, are considered as mandatory if the corresponding design values are specified in the certificate.

For the transfer of type tests in case of:

  • changes to standards,
  • changes in product status (e.g. design changes, new suppliers of main assemblies, etc.),
  • different rated values,
  • different/multiple/derived designs,
  • secondary manufacturers,

ZP 209 (Transfer of type tests) shall apply, if applicable.

 

Proof of conformity of the routine tests

The routine tests carried out at the manufacturer’s must meet the following requirements:

  • They must be complete and in conformity with the standards,
  • The equipment and measuring instruments used shall be suitable for routine testing,
  • The measuring instruments used must be calibrated in a valid fashion in line with the requirements of ISO 9001 and in analogy to ISO/IEC 17025 and be traceable to national or international calibration standards,
  • The routine test report must document the routine tests in accordance with standards and in a comprehensible manner and must be complete.

If required, the suitability can be checked by the technical expert on a random basis, if necessary on site.

 

Proof of conformity of the design

The conformity of the product with its specific design characteristics shall meet the requirements of the product standards in relation to "Design and Construction". This must be documented by a detailed and comprehensible manufacturer's declaration.
The manufacturer must have a valid quality management system certified according to ISO 9001 for the quality assurance of their development (design) at the development site concerned.

If required, the suitability can be checked by the technical expert on a random basis, if necessary on site.

 

Proof of conformity of the construction (production site)

The manufacturer must have a valid quality management system certified according to ISO 9001 for the quality assurance of their development (manufacture) at the production site concerned.

If required, the suitability can be checked by the technical expert on a random basis, if necessary on site.