DTSD1352(III)The secondary access scheme for electric energy meters mainly includes two methods: direct access and transformer access.‌

Direct access solution

‌Voltage wiring‌When there are three phases and three wires,UATheUBTheUCConnect separatelyATheBTheCThree-phase voltage,Npick upBPhase voltage; Used for voltage lines1.5squaredBVRMulti core hard wires need to be installed between the live wire and the meter5AFuse. When there are three phases and four wires,UATheUBTheUCConnect separatelyATheBTheCThree-phase voltage,NConnect the neutral wire and voltage wire equally1.5squaredBVRMulti core hard wire.

‌Current wiring‌The primary current of the transformer is fromP1Surface flow directionP2noodles; The secondary currents correspond toAOutput of mutual sensorsS1pick upIaEnd,S2pick upIaEnd,CPhase transformerS1pick upIcEnd,S2pick upIcEnd, current line usage2.5squaredBVRMulti core hard wire.

‌communication terminal‌：RS485(A+TheB-)Apick up21Number Gate,Bpick up22Number port, useRVSP2*1.0Square multi-core twisted pair shielded flexible wire. It is recommended to use a cold press head to press the upper communication wire of the instrument before connecting it to the instrument to prevent short circuits caused by flying wires in the communication wire, which may affect the entire communication circuit.

Transformer access scheme

‌Voltage wiring‌Similar to direct access,UATheUBTheUCConnect separatelyATheBTheCThree-phase voltage,Npick upBPhase voltage or neutral line.

‌Current wiring‌The primary current of the transformer is fromP1Surface flow directionP2noodles; The secondary current is connected to the corresponding terminal of the energy meter through a transformer.