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High Voltage Power Transformer | 35kV Above Large Power Transformer

Backed by strong technical capabilities and a strict quality management system, we have earned the trust of major enterprises such as China National Petroleum Corporation (CNPC) and COSCO Shipping, and have participated in several national key engineering projects. All our products are CE certified and exported to the United States, Southeast Asia, India, the Middle East, and many other regions, receiving widespread recognition.
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Advantages of power transformer suppliers

Apex Technologies firmly believes that trust and professionalism are the foundation of successful partnerships. We empower our clients with strong support to help them win more projects and orders.

Short Lead Time

Customer satisfaction is our top priority. For urgent orders, we can shorten the production cycle to meet your delivery requirements.

Quick Response

With extensive experience in global collaboration, our team responds promptly to your needs — saving time and achieving mutual success.

Competitive Pricing

We offer highly competitive prices while ensuring the highest product quality.

Global Standard Power Transformer | IEC ANSI Certified Transformer

Single-phase（Floor-mounted）Pad-Mounted Transformer VIEW DETAILS

Single-phase（Floor-mounted）Pad-Mounted Transformer

Low-voltage Switchgear VIEW DETAILS

Low-voltage Switchgear

Wind Power Step-up Transformers VIEW DETAILS

Wind Power Step-up Transformers

Ultra-high Voltage (UHV) Power Transformers (Up to 500kV) VIEW DETAILS

Ultra-high Voltage (UHV) Power Transformers (Up to 500kV)

Special power transformer for photovoltaic power station grid connection. Anti-interference performance stable, match new energy power generation parameters.

Frequently Asked Questions (FAQ)

Q:How to clean the dust on the surface of the windings of a dry-type transformer?

A:After power outage, use dry compressed air (pressure ≤ 0.3 MPa) for blowing; stubborn dust can be gently brushed off with a brush; water or chemical cleaners must not be used; after cleaning, measure the insulation resistance again.
A:Minor leakage: Tighten the flange bolts of the casing and replace the sealing gasket; Severe leakage: Replace the casing after power outage; If the insulation inside the casing gets damp, conduct an insulation test and replace the casing if necessary.
A:Reasons: Loosening of core, deformation of windings, resonance of components, failure of cooling system, influence of grid harmonics. Measures: Tighten the core clamps; Correct the position of windings; Adjust the shock absorption devices of cooling fans / oil pumps; Install soundproof covers; Address grid harmonics.
A:Use copper busbars or cables for connection, with the conductor cross-section meeting the current-carrying requirements; the connection points need to be treated with tin plating or silver plating to reduce contact resistance; install lightning arresters and disconnect switches on the high-voltage side to facilitate maintenance; add insulating covers for the busbars on the low-voltage side and mark the phase sequence; after connection, check the insulation and phase sequence to ensure there are no errors.

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