Rectangular iron all-cast moulding boxes having inside dimensions: length from 2400 to 3000 mm, width from 1600 to 2000 mm, height 700; 800 mm. Construction and dimensions
State system for ensuring the uniformity of measurements. State verification schedule for instruments measuring the ratio error and phase displacement of a.c. power frequency voltage in the range from 0,1/V3 to 750/V3 kV
