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Installing a dry type power transformer involves careful planning and adherence to safety protocols to ensure efficient operation and longevity of the equipment. Below is a general guide for installing a dry type power transformer.
Location: Choose a well-ventilated area that is free from corrosive substances, excessive dust, and direct exposure to sunlight or weather elements. Ensure there is enough space around the transformer for maintenance and cooling.
Foundation: A level and sturdy foundation is crucial. Follow our recommendations for the foundation size, type, and anchoring requirements. The surface should be able to support the transformer's weight evenly.
Access and Clearance: Provide easy access for installation, future maintenance, and emergency services. Maintain clearances as per local codes and guidelines, typically at least 3 feet around the transformer.
Inspect Transformer: Before installation, inspect the transformer for any signs of damage during transportation.
Verify Specifications: Confirm that the transformer's voltage, capacity, connections, and dimensions match the site requirements and design specifications.
Lifting: Use appropriate lifting equipment such as a crane or hoist, following the manufacturer's recommended lifting points. Ensure all lifting gear is rated for the transformer's weight and that proper slinging techniques are used.
Positioning: Carefully place the transformer onto its mounting location, ensuring it is level and aligned with the bolt holes on the foundation. Do not drag or drop the transformer.
Secure the Transformer: Bolt the transformer down securely to the foundation using the provided anchor bolts and hardware. Follow torque specifications provided by the manufacturer to avoid over-tightening or under-tightening.
Grounding: Connect the transformer's grounding lug to a suitable earth ground using a copper wire or bar as per local electrical codes. This is critical for safety.
Disconnect Power: Ensure the power supply to the system is disconnected before making any electrical connections.
Wiring: Connect primary and secondary cables according to wiring diagrams. Use appropriate cable sizes and terminations, and torque connection bolts to the specified values.
Bushings and Terminations: Install and tighten bushings and terminal connectors securely. Apply dielectric grease or compound where required to prevent corrosion and improve conductivity.
Visual Inspection: Check all connections for tightness and correctness.
Insulation Resistance Test: Perform an insulation resistance test (megger test) to verify the integrity of the transformer's insulation.
Polarity and Voltage Tests: Verify correct polarity and voltage ratios using appropriate testing equipment.
Functional Test: With the approval of the electrical inspector, energize the transformer and perform functional tests to ensure it operates as expected.
Record Keeping: Document all installation steps, test results, and any deviations from standard procedures.
Maintenance Plan: Establish a regular maintenance schedule as recommended by the manufacturer. This typically includes visual inspections, cleaning, and periodic testing.
Remember, safety is paramount throughout the installation process. Always wear personal protective equipment (PPE), follow lockout/tagout procedures, and adhere to local and national electrical codes and standards.
