Registration number (WIID)Project No.TitleStatus
50536HD 301 S1:1977Indirect acting electrical measuring instrumentsAtcelts
54347HD 249 S1:1978Laboratory d.c. resistorsAtcelts
51370HD 249.2 S1:1981Laboratory resistors - Part 2: Laboratory a.c. resistorsAtcelts
52086HD 233 S1:1977Recommendations for direct acting indicating electrical measuring instruments and their accessoriesAtcelts
42239HD 215 S1:1974Safety requirements for indicating and recording electrical measuring instruments and their accessoriesAtcelts
51160EN 61557-9:1999Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systemsAtcelts
43243EN 61557-8:1997Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT systemsAtcelts
47683EN 61557-7:1997Electrical safety in low voltage distribution systems up to 1 kV a.c. and 1,5 kV d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequenceAtcelts
50153EN 61557-6:1998/AAElectrical safety in low voltage distribution systems up to 1 kV a.c. and 1,5 kV d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 6: Residual current devices (RCD) in TT, TN and IT systemsIzstrādē
46539EN 61557-6:1998Electrical safety in low voltage distribution systems up to 1 kV a.c. and 1,5 kV d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 6: Residual current devices (RCD) in TT, TN and IT systemsAtcelts
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