open box to check

Secondary transportation

Equipment in place

Lifting core inspection

Accessory installation

Oil filtering and oil filling

acceptance

Rhythm: The second uncle is newly rich, and they (break) up with each other again

Vacuum circuit breaker inspection

Operating mechanism inspection

Vacuum circuit breaker in place

Mechanical and electrical performance testing

open box to check

Body installation

Filled with sulfur hexafluoride

Operating mechanism installation

Check and adjust

Insulation test

test

Tips: Open the six-machine test

open box to check

Secondary transportation

Installation and fixation

Busbar installation

Secondary loop connection

Experimental adjustment

Power transmission operation acceptance

Tip: If you want to move an ancient tomb, try your hand a second time

The storage and storage period of electrical equipment and equipment before installation should be in accordance with the manufacturer’s requirements.

Fasteners should be galvanized

After the transformer is installed in place, each ground lead section should be well grounded.

There should be no jamming in the linkage between the circuit breaker and its operating mechanism, the opening and closing instructions should be correct, and the switch action should be correct and reliable.

The reactor should be installed so that the winding direction of the coil meets the load design requirements.

The discharge circuit of the capacitor should be complete and the grounding switch should be flexible in operation.

The ground contact of the handcart unit is reliably grounded

The straight section of the metal bridge exceeds 30M

The straight section of the aluminum bridge exceeds 15M

There should be expansion joints or expansion sheets

The cables should be laid from the centralized point of cable layout to the dispersed point of cable layout. Cables to the same end point should be laid at one time.

The cable should be capped within 4 hours after cutting.

three phase colors

Arrangement up and down

Horizontal arrangement

Down conductor layout

Check that all relevant primary and secondary equipment installation and wiring should be completed, and all signs should be obvious, correct and complete. It is necessary to carry out the secondary circuit power check first, and then carry out the primary circuit power check.

The primary circuit has undergone insulation resistance measurement and withstand voltage testing, and the insulation resistance value complies with regulations. The insulation resistance measurement and withstand voltage test of the weak current circuit in the secondary circuit shall be carried out according to the manufacturer's regulations.

Already have AC and DC power supplies for reliable operation (circuit breaker), signaling and closing of secondary systems

The current and voltage transformers have passed electrical tests. There is no open circuit on the secondary side of the current transformer, and there is no short circuit on the secondary side of the voltage transformer.

Check that the relays and instruments in the circuit have been calibrated and passed the test

The circuit breaker and isolation switch of the inspection circuit have been adjusted, and the circuit breaker has undergone manual and electric tripping tests.

Contents of handover test

Precautions for handover test

The secondary circuit test of the power receiving system has passed the test, and its protection setting value has been set according to actual requirements.

According to the approved power receiving operation instructions, organize the high-voltage side of the newly-built electrical system transformer to receive power from the grid side, and press the power distribution cabinet through the power distribution cabinet.

After the trial power-on, the system works normally and the trial operation of the new project can be carried out.

Operating conditions

security requirements