Seismic-Resistant Transformer

Seismic-Resistant Cast Resin Transformer

Seismic-Resistant Oil-Immersed Transformer

SEISMIC-RESISTANT TRANSFORMER

A transformer equipped with patented friction damper technology optimized specifically for transformer applications, delivering industry-leading seismic performance and stable operation even during earthquakes of up to magnitude 8.6.

Industry-Leading Performance

Passed magnitude 8.6 earthquake test
Minimal Seismic Displacement

Up to 90% reduction
Superior Economics

20% lower total cost of ownership (TCO)

Product Inquiry Catalog

Core Technology

Because transformers are floor-mounted, they are structurally vulnerable to shaking and displacement during earthquakes. Excessive displacement can occur particularly in the short-axis (Y-axis) direction, requiring seismic vibration-control devices.
Through an R&D project led by the Ministry of Land, Infrastructure and Transport (MOLIT), Enertech developed and applied rotary friction-damper seismic control technology tailored to the structural characteristics and dynamic behavior of transformers, significantly enhancing seismic performance.

Custom structural design optimized for transformer structure load ranges of 0.5–20 tons
Stable seismic design reflecting transformer dynamic characteristics and behavior, including natural period, response acceleration, and response displacement
Optimized friction-damper technology that enables easy installation, reduces installation space and time, and improves economic efficiency

Accredited Test Reports

Performance and reliability have been verified through rigorous testing by accredited institutions.

750 kVA Test Report
1,500 kVA Test Report
3,000 kVA Test Report

Test Standard : ICC-ES AC156
Test Samples : Three seismic-resistant transformer models (750 kVA, 1,500 kVA, and 3,000 kVA)
Test Institutes : SGS Korea and the Earthquake Disaster Prevention Research Center

Test Item	Unit	750kVA	1,500kVA	3,000kVA	Acceptance Criteria	Test Result
Seismic Performance	g	0.80	0.80	0.88	0.55 or more	Pass
Maximum Displacement	mm	32.7	25.0	19.0	75 or below	Pass
Amplification Factor	ap	Compliant	Compliant	Compliant	1.0 ≤ aₚ ≤ 2.5	Pass