Electrical switchgear engineers NOJA Power Switchgear has highlighted the importance of Type Test Certificates as proof of compliance with international standards such as IEC62271-111 and IEEE C37.60 for automatic circuit reclosers.
NOJA Power has informed customers only Type Test Certificates issued by independent test bodies prove that a product has been verified to meet full IEC and IEEE standards. While alternative documentation such as Reports of Performance can be useful for recording tests on particular aspects of a recloser’s electrical function, they are not proof of compliance to international standards covering recloser electrical functionality.
Joop Hooijmans, General Manager of KEMA High-Power Laboratory in Arnhem explains Type Test Certificates such as certificates with a gold label issued by KEMA are unique because they certify that medium-voltage switchgear products (and all other components used in systems for the transmission and distribution of electrical energy) have completed and passed testing to verify they meet international standards such as IEC62271-111 and IEEE C37.60.
Hooijmans adds that documents such as Reports of Performance are useful but should never be taken as proof of product compliance with international standards.
NOJA Power’s OSM reclosers have been subjected to full type testing by independent test consultants DNV KEMA. The OSM38 recloser, for example, was tested for electrical performance including interruption duty cycle at 12.5 kA, load switching at 630 A, cable charging, line charging, dielectric withstand capability including 170 kV BIL across the open gap and 195 kV BIL phase-to-phase and phase-to-ground, wet and dry power frequency, temperature rise and mechanical operations testing.
NOJA Power consequently received three Type Test Certificates from DNV KEMA for the OSM38 recloser, confirming successful testing and full standards compliance. The OSM15 and OSM27 products have also received type test certification from DNV KEMA.
Oleg Samarski, NOJA Power’s Service & Quality Director advises utilities to ask the manufacturer for a Type Test Certificate from an independent laboratory to ensure the recloser’s compliance with relevant aspects of international standards.
All OSM reclosers from NOJA Power are certified, providing the assurance of reliability and safety to customers.