Electricity metering equipment(AC)—Particular requirements—Part 24: Static meters for fundamental component reactive energy (classes 0,5S, 1S, 1, 2 and 3)
Electrical safety in low voltage distribution systems up to 1000V a.c. and 1500V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 10: Combined measuring equipment for testing, measuring or monitoring of protective measures