(1).根据电流互感器装置处电压等级确定额定电压 (2).根据Ie=I

(1). Determine the rated voltage according to the voltage level at the current transformer device <br>(2). Determine the CT primary rated voltage according to Ie = Igmax / 110% <br>(3). Determine the level group and wiring method according to the CT use of the transformer <br>(4). On the 100kV line side, set three sets of differential, overcurrent, and measurement CTs, and connect them into three-phase star <br>10kV main transformer outlets. Set up three sets of differential, measurement, measurement, and current protection CTs, and connect them into three-phase star <br>10kV Two groups of CTs for measurement, measurement and current protection are installed at the outlet of the load, and connected into a two-phase star <br>(5). Select the model and verify the thermal stability and dynamic stability according to the short circuit situation

(1) The rated voltage is determined according to the voltage level at the current transformer unit <br>(2) Determine ct one-time voltage rating based on Ie-Igmax/110% <br>(3) According to the CT use of the transformer, determine its sub-group and wiring mode <br>(4) 100kV line side setting differential, overcurrent, measurement of three sets of CT, connected to three-phase star<br>10kV main variable outlet setting differential, metering, measurement and current protection three sets of CT, connected to a three-phase star shape<br>10kV load outlet set up metering, measurement and current protection two sets of CT, connected to a two-phase star <br>5. Selected model, check thermal stability and dynamic stability according to short circuit conditions

(1) . determine the rated voltage according to the voltage level at the current transformer device<br>(2) Determine CT primary rated voltage according to IE = igmax / 110%<br>(3) According to the purpose of CT, determine the level group and wiring mode of CT<br>(4) Three sets of CT for differential, overcurrent and measurement are set at 100kV line side, which are connected into three-phase star<br>Three sets of CT for differential, metering, measuring and current protection are set at the outlet of 10kV main transformer, which are connected into three-phase star<br>Two sets of CT for metering, measuring and current protection are set at 10kV load outgoing line, which are connected into two-phase star<br>(5) . select the model and verify the thermal stability and dynamic stability according to the short circuit condition<br>