Installation requirements for dry-type transformers:

1. Transformer unpacking inspection

1) Relevant staff should be present during unpacking and inspection.

2) First check if the packaging is intact, unpack and check, the specifications, model specifications, and total number of transformers and bottom pressure plates should comply with the design plan, accessories and accessories are available, spare parts should be marked, product technical documents, and certificate of conformity It should be complete, unpacking inspection should be recorded, product quality problems should be clearly raised immediately, and unpacking inspection records should be made.

2. Secondary transportation of the transformer

1) Before shipping, check the model specifications and total number of transformers.

2) The transformer is used for freight transportation, and there is no need for severe shock and vibration during the whole transportation process, and it must be fixed and firm during transportation to ensure stability.

3) During the whole transportation process, full-time personnel are required to monitor to avoid skewing.

4) When unloading the transformer, immediately unload and place it on the rollers that have been placed in advance. The placement of the transformer should take into account the installation location, and the dragging of the transformer should be avoided when placing the transformer.

5) When the dry-type transformer casing can be dismantled, the casing must be dismantled first. When disassembling, make a mark to prevent reverse installation. When disassembling, avoid observing the damage of the glass window.

6) When consigning transformers, safeguard measures should be adopted, such as paving vulcanized rubber to avoid damage to the road surface. When consigning, pay attention to avoid encountering insulating layer winding.

7) The drag should be symmetrical, consistent, and harmonious, and the drag should be slow to avoid skewing.

8) Project construction should be carried out under unified command to avoid injury to hands and feet caused by rolling bars.

3. The transformer is in place

1) Remove the dry-type transformer packaging wooden box, hoist it on the roller bar, and slowly send it to the base of the steel. If necessary, a Hulu traction belt can be used on the lock shelf at the bottom 1/3 of the transformer.

2) When the dry-type transformer is immediately fixed at the base of the channel steel, hoist the transformer in place with a tripod pole and hulu, measure the in-position error with a level, plumb line, and steel tape measure, and reduce the error with the method of padding white iron. Within the fine range, the middle of the thin white iron sheet and the power consumption between the thin iron and the basic channel steel are spot welded firmly, and a matching mark is made on the transformer base. Generally, no more than 3 washers should be allowed, and the washers should not be exposed outside the base.

3) Use an oil-based marker to mark the matching place of the fixed hole of the base, remove the transformer, drill a hole of φ11 (actually according to the dry test power engineering transformer specification selected by the model) at the mark, and use M12 (actual basis) Tap the taps of the dry test power engineering transformer specifications selected by the model, and the transformer is in place here. After alignment, use M12X40 (actually select dry test power engineering transformer specifications based on the model) hot-dip galvanized anchor bolts to cross φ12 (actual According to the dry test power engineering transformer specifications selected according to the model), tighten the square washer.

4) When the transformer is installed in the protective cover, first fix the protective cover according to the vertical plate method, and then use the tripod pole to lift the transformer to install the roller, adjust the high and low side orientation (when there is no design plan, use the convenient bottom pressure side The busway is connected to the busway in the three-phase five-wire cabinet as standard), the protective cover door is set to intimidate the traction belt, the coercion* high point is flush with the edge of the track in the protective cover, and is sent to the transformer rail to adjust the transformer weight * point Make it overlap with the * in the protective cover, and connect the anchor bolt to the rail to make the roller reliable brake system.

5) The instrument panel will be sent to the calibration room for testing. After reaching the standard, it will be fixed and the transformer must be installed in a stable and firm place.

6) The dry-type transformer itself, the upper casing iron prefabricated component and the transformer core connection address, use a 1x50mm2 cross-sectional multi-core copper copper core cable on both sides of the electroplating tin copper lug, and then screw it to the grounded flat iron at the connection point Apply compound grease for power engineering. After the neutral line of the dry-type transformer crosses the zero sequence current and voltage transformer, it should be connected to the main grounding grid according to the design plan.

7) Hot-dip galvanized standard parts are selected, the pressure release parts should be tightened, and the exposed length of the screw teeth is 3 to 5 buckles.

8) Carry out experiments according to the work handover experiment standard of electrical equipment.

9) After the transformer is in place, it is not fixed by electric welding first, and after the bottom plate is in place, it is welded together by electric welding. After the transformer is in place, install the case properly according to the markings.