Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Part 7. Phase sequence
State system for ensuring the unification of measurements. State special standard and state verification schedule for means measuring radiation field parameters of antenna systems with aperture dimensions from 5 to 100 m and of the airborne antennas within the frequency range from 0,3 to 3,0 GHz
