| 摘要 |
1533072 Measuring current at high voltage INTERNATIONAL STANDARD ELECTRIC CORP 16 June 1977 [21 June 1976] 25222/77 Heading G1U [Also in Division H3] Non-linearity in the input-output characteristic of a standard optical-coupler, Fig. 1, is compensated for by feeding the output 10, Fig. 3, to an amplifier A 1 having a matched optical-coupler in its negative feedback. The arrangement is particularly suitable for measuring current in a high voltage supply, in which case the input voltage E 1 , Fig. 1, is derived from.a current transformer or an appropriate resistive shunt. |
