Low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Electrical safety. Equipment for testing, measuring or monitoring of protective measures. Part 6. Residual current operated protective devices in TT, TN and IT systems
Sound broadcasting digital. Coding of signals of sound broadcasting with reduction of redundancy for transfer on digital communication channels. A part III (MPEG-4 audio). Audio lossless coding
State system for ensuring the uniformity of measurements. State special standard and state verification schedule for means of measuring sinusoidal current ratio
