| 摘要 |
PURPOSE:To measure each sectional load accurately with low cost, by enabling remote control of a plurality of section switches arranged in a plurality of distribution lines connected through CTs with a single transformer and coupling the terminals of the distribution lines as required. CONSTITUTION:Distribution lines 2a, 2b are connected through CTs 3a, 3b with a power source 1. Remotely controllable section switches 4a-4e are arranged in the distribution lines 2a, 2b to form sections 5a-5g, and loads 6a, 6b...6p, 6q are connected to respective sections. A coupling switchgear 7 is connected between the terminals of the distribution lines 2a, 2b and the coupling switchgear 7 is normally opened. When the loads in respective sections 5a-5g are measured, the coupling switchgear 7 is closed then a section switch 4c, for example, is opened. Consequently, the CT3a indicates the load in the sections 5a-5c while the CT3b indicates the load in the sections 5d-5g. Load in the section 5d is detected based on the amounts indicated by the CTs 3a, 3b. By such arrangement, load in each section can be detected easily end accurately and the load is transferred properly upon occurrence of fault. |
