Compliance Standard & Core Electrical Parameters

The bushing is engineered and produced strictly complying with ANSI/IEEE C57.19.00 and C57.19.01 American standards. Rated voltage reaches 1.2kV, Basic Impulse Level (BIL) is 30kV, 1min power frequency wet withstand voltage is 10kV, and creepage distance meets the pollution resistance demand of North American outdoor power grid. Multiple current grades from 63A to 208A (63A,80A,100A,125A,160A,208A) cover all low-current demands of small & medium-capacity American oil-immersed transformers. Every finished product passes full type tests including dielectric withstand, oil tightness leakage and torque strength test to guarantee stable and consistent electrical performance.

Structural Material & Sealing Technology

The insulating body is made of high-purity wet-process porcelain with compact smooth light grey glaze, featuring oil resistance, anti-aging and crack resistance. The shed design extends creepage distance to avoid surface flashover caused by condensation and dust. The central conductive stud is integrally forged by T2 pure copper with tin plating for anti-oxidation and low contact resistance. Complete assembly includes NBR oil-resistant rubber gaskets, galvanized brass terminals and stainless steel lock washers for one-step installation on transformer tank flange. The rubber sealing parts maintain stable performance under long-term immersion in transformer mineral oil to eliminate oil leakage of the transformer tank.

Mechanical Performance & Installation Compatibility

The rigid integrated structure bears cantilever tension of terminals and busbar fastening torque. The porcelain insulator resists vibration and thermal deformation under wide temperature range from -40℃ to 130℃. Standardized flange mounting dimension enables direct replacement for legacy North American transformers without hole modification or bracket rework, greatly cutting on-site maintenance time. Two terminal types (threaded stud & spade terminal) are available to match direct copper bar connection and cable lug connection, suitable for pole-mounted transformers, pad-mounted transformers and distribution station transformers.

Application Scope & Product Highlights

This bushing is exclusively for low-voltage outlet of oil-immersed distribution transformers, not applicable for dry-type transformers or switchgear equipment. Main export destinations cover the United States, Canada, Mexico and other North American power utilities and transformer OEM manufacturers. Compared with non-standard customized bushings, ANSI standardized products feature strong spare part interchangeability and easy inventory management. It performs excellently against lightning strike, outdoor humidity and salt spray corrosion, with low operation temperature rise to avoid overheating failure at low-voltage connection points.

Product Information

• Rated Voltage: 1.2kV
• Rated Current: 63A~208A (optional graded specifications)
• BIL Lightning Impulse Withstand Voltage: 30kV
• 1min Power Frequency Wet Withstand Voltage: 10kV
• Insulation Material: High Alumina Porcelain (Light Grey Glaze)
• Sealing Component: NBR Oil-resistant Rubber
• Applicable Equipment: Oil-immersed Distribution Transformer
• Operating Ambient Temperature: -40℃ ~ +130℃

This 1.2kV ANSI low-voltage bushing is only designed for oil outlet of oil-immersed distribution transformers. It cannot be applied to dry-type transformers, ring main units, switchgears or high-voltage bushing replacement. Its insulation and sealing structure cannot adapt to dry air insulation conditions, which will lead to insulation breakdown and oil leakage failure.
For transformer high-voltage outlet, select ANSI high-voltage bushing separately instead of mixing this 1.2kV low-voltage model.
 

tips:Different current and voltage specifications of American standard bushings are available. Welcome to send us your requirements for free quotation and professional technical guidance.