Incoming and outgoing switches shall be selected according to the capacity of distribution transformer.
The exposed part shall be painted with yellow and green paint, and the interval width of yellow and green paint shall be 100mm.
The grounding down lead shall be close to the cement rod and cross arm, installed horizontally and vertically, and fixed with stainless steel tie every 1.5-2m.
When fusing the fuse tube, the upper contact shall have a certain compression stroke 5.
（9）.
Grounding device (1) The specification and buried depth of the grounding body shall comply with the design regulations.
Distribution transformer ▲ diagram S11 transformer ▲ diagram S13 transformer (1) S11 type and above energy-saving and environment-friendly transformers shall be selected for newly installed transformers.
The root opening of distribution transformer rack is 2.5m.
Waterproof bends shall be made when connecting the soft copper plastic pole of the low-voltage outgoing line of the transformer with the overhead line to prevent rainwater from penetrating into the distribution box from the wire core and causing phase to phase short circuit.
8.2 laying method of protective sleeve (1).
Integrated distribution box (1) The integrated monitoring terminal of distribution transformer, knife switch of each branch, switch of each branch and automatic reactive power compensation device shall be installed in the integrated distribution box.
High voltage arrester (1) The high voltage arrester is installed on the cross arm between the high voltage disconnector and the drop switch.
(5) .
（3）.
（2）.
Disconnect switch (1) The 10kV incoming end of the transformer bench should be equipped with an isolating switch.
Drop out fuse (1) The height of drop fuse from transformer bench shall not be less than 2.5m.
The high-voltage drain wire shall use insulated aluminum conductor not less than 35mm2; The joint length shall not be less than 100mm.
（2）.
……………………………………………………………………..
(3) The maintenance platform is only allowed to be installed on the low-voltage side, and not on the high-voltage side.
The down lead shall be copper wire with a section of not less than 25 mm2 or aluminum wire with a section of not less than 35 mm2; The grounding down lead of each phase of three-phase high-voltage arrester shall be made into a separate grounding wire, which shall be connected to the grounding body after three-phase interconnection.
（2）.
When the upper pole of the low-voltage outgoing cable of the distribution transformer is connected with the overhead line, a waterproof bend shall be made to prevent the rainwater from penetrating into the distribution box from the wire core and causing phase to phase short circuit.
2.
（2）.
（2）.
During installation, it shall maintain an inclination of 15-30 degrees with the tower.
The distribution transformer shall be fixed on the iron cross arm of the bench, and the U-shaped hoop and pressing plate of the distribution transformer shall be used, and the anti-theft nut shall be used.
Each branch switch and switch in the distribution box shall have corresponding number, and the outgoing line of the branch circuit breaker shall be marked with the pole number on the receiving side (or user name).
The grounding lead and grounding round steel or flat iron shall be connected with crimping terminal or parallel groove clamp, and the parallel groove clamp connected with parallel groove clamp shall not be less than 2.
Height of integrated distribution box and lead cable to the ground ≥ 2.5 Meters, no fence is required 3.
(4) .
（3）.
When there is no provision in the design, it shall not be less than 0.6m。 （2）.
The upper drain wire and the lower grounding wire of the arrester shall be connected with copper aluminum or copper tinned terminals.
（6）.
the operation shall be flexible and reliable, and the contact shall be tight.
（3）.
The color of the insulating cover should correspond to the phase color of the line, and the phase-to-phase distance should not be less than 350 mm.
(3) .
（3）.
The copper bar in the integrated distribution box shall be heat shrinkable wrapped, the incoming and outgoing lines shall enter and exit from the lower part of the distribution box, and the incoming and outgoing lines shall be tightly blocked with fireproof materials.
The horizontal phase to phase distance of drop fuse shall not be less than 500mm.
Distribution transformer stand (1) The distribution transformer rack should adopt fifteen Meter pole erection.
The static contact is installed on the power side and the dynamic contact is installed on the load side.
The capacity of 315KVA and 400KVA shall not be laid with soft copper plastic wire and protective sleeve..
（4）.
The round steel or flat iron leading out from the upper pole of the grounding body shall be sleeved with PVC sleeve, and the height shall not be less than 2.5m.
Before connection, the rust and attachments at the connection part shall be removed.
(2) PVC pipe 90 degree waterproof elbow shall be used at the low-voltage inlet and outlet sides of transformer and soft copper plastic wire rod.
The lightning arrester should be installed with an insulating cover.
When lap welding is adopted for the connection of grounding body, the following provisions shall be met: the lap length of flat steel shall be twice its width, and welding shall be carried out on four sides.
（8）.
When the cable protection pipe is a steel pipe, it shall be connected with the grounding lead by bolts, and the welding place of the grounding bolt shall be provided with anti rust treatment.
（5）.
The connection of grounding device shall be reliable.
（2）.
The down lead of lightning arrester shall be reliably grounded, and the grounding resistance value shall not be greater than 10 Ω.
（4）.
the grounding down lead shall be connected with the grounding body, which shall be easy to untie and measure the grounding resistance.
It is strictly prohibited to lock the conductor directly on the terminal post 6.
Copper aluminum or copper tinned terminals shall be used for the connection between the shell grounding of transformer and integrated distribution box and the grounding body.
（4）.
（4）.
8.1 cable laying method for low voltage incoming and outgoing lines of transformer (1) When the low-voltage incoming and outgoing lines of the transformer are laid with cables, cross-linked polyethylene copper core unarmoured yjv-4 shall be adopted × 150 cable, with a capacity of 200KVA and below (100 \ 200), one incoming cable is laid, and the outgoing cable is laid according to the outgoing circuit; 250kVA and above (400), two incoming cables are laid, and outgoing cables are laid according to the outgoing circuit.
8.
（3）.
（2）.
the lead spacing and radian requirements shall be consistent, the lead shall be closely connected, the lead phase distance shall not be less than 300mm, and the clearance distance from the cement pole, stay wire and cross arm shall not be less than 200mm 4.
The drain wire of lightning arrester shall be short, straight and tightly connected.
The lap length of round steel shall be 6 times of its diameter and welded on both sides.
（3）.
1.
The horizontal phase to phase distance of disconnector shall not be less than 500mm.
7.
When soft copper plastic wire is used for laying, the total cross-sectional area of the conductor shall not be greater than 40% of the net area in the pipe, the PVC pipe cable hoop on both sides shall maintain the same horizontal line, and the joint shall use fast adhesive and be installed firmly.
（7）.
It is strictly prohibited to lock the conductor directly on the terminal.
In order to reduce types, they shall be configured according to two rated capacities plus adjustable.
（4）.
When the round steel is connected with the flat steel, the overlapping length shall be 6 times of the diameter of the round steel.
The high and low voltage terminals of distribution transformer shall be equipped with insulating cover, and the color of the insulating cover shall correspond to the phase color of the line.
