Common Questions And Answers About 1.2KV 600A Delta Transformer Bushings

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 Q1: What special designs does this bushing have for outdoor or harsh industrial environments (such as coastal salt fog and chemical plant pollution)?
A1: To cope with harsh conditions, especially for outdoor models and special industrial applications, this product features the following enhanced designs:
Enhanced insulation: The insulator (such as porcelain or composite insulator) is designed with deep ribs and multiple umbrella skirts. This provides a longer creepage distance and effectively prevents flashovers due to pollution and moisture. The material (such as high-strength porcelain, high-temperature vulcanized silicone rubber) has excellent hydrophobicity, UV resistance, and anti-aging properties.
High protection sealing: The overall sealing system (such as flange sealing, terminal sealing) uses more weather-resistant and corrosion-resistant sealing materials (such as fluororubber) to ensure long-term stable sealing performance in salt fog, acid rain, and high humidity environments.
Corrosion protection treatment: All exposed metal parts (such as installation flanges, fasteners, terminal blocks) are usually treated with hot-dip galvanizing, electroless nickel plating, or spraying special anti-corrosion coatings to resist atmospheric and chemical corrosion.
Wide temperature range adaptation: The material selection ensures that the product can operate normally within the temperature range of -40°C to +40°C (even wider), without cracking, aging, or performance degradation.
Q2: What are the key parameters and precautions to consider when conducting the selection and installation process?

A2:Selection key parameters:
Electrical parameters: Confirm the rated voltage (1.2kV) and rated current (≤600A) of the system.
Insulation level: Verify the requirements for power frequency and impulse withstand voltages of the equipment to ensure that the bushing meets the insulation coordination.
Installation dimensions: Include the center distance of the installation flange, hole diameter, terminal height, spacing, outlet angle, etc., and ensure they are fully compatible with the transformer oil tank cover and external connection lines (wires).
Installation method: Confirm whether it is horizontal installation, vertical installation or inclined installation.
Environmental requirements: Clearly specify indoor or outdoor use, as well as the pollution level, altitude, etc. of the environment, to determine the required creepage distance and material grade.
Important installation precautions:
Sealing treatment: Clean the oil tank flange surface and the bushing sealing surface before installation, inspect and correctly place, press the sealing gasket, and evenly tighten the installation bolts in the specified diagonal order and torque. This is the key to preventing oil leakage.
Connection requirements: When connecting external busbars or cables, ensure the contact surface is flat and clean, apply an appropriate amount of conductive paste (if applicable). Use sufficient tightening torque to ensure good electrical connection and prevent local overheating.
Phase verification: After installation, it is necessary to verify that the phase markings are consistent with the actual system phase sequence.
Avoid stress: The external connection busbars or cables should not apply additional bending or torsion stress to the bushing terminals. If necessary, set supports.
Q3: How to verify the quality and performance of the bushing?
A3: We guarantee that each factory-bought bushing has undergone strict testing and verification, including:
1. Factory routine tests: including appearance and size inspection, loop resistance measurement, power frequency dry withstand voltage test, sealing performance test (such as oil pressure or gas pressure test), partial discharge test (if applicable), etc., to ensure that each product is qualified.
2. Type tests: Regularly conduct more comprehensive tests on representative samples, including temperature rise test, lightning impulse withstand voltage test, short-circuit current bearing capacity test, climate aging test, etc., to verify the comprehensive performance of the product design.
3. Certification and standards: Product design and production strictly follow relevant international standards (IEC 60137) and national standards (GB/T 4109), and can provide authoritative third-party test reports upon customer request.
These tests jointly ensure the long-term operational reliability and safety of the 1.2KV 600A delta transformer bushing.

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