BCT Terminal Box for Medium & Large Transformers, Bushing Current Transformer Lead Wires

The BCT terminal box (Bushing Current Transformer Terminal Box) is a vital matching component for oil-immersed power transformers. It is widely installed on medium and large-sized transformers and serves the lead connection of bushing current transformers.

Core Function

It realizes safe, sealed connection between the secondary winding outgoing wires of BCT and external control & protection circuits. The enclosed structure prevents moisture, dust and foreign contaminants from invading, avoiding insulation failure and open-circuit risks of CT secondary circuits.

Main Product Advantages

1. Excellent Sealing Performance

   Cast aluminum housing with reliable gasket sealing, passes strict air tightness test, adapts to oil-immersed transformer operating environment.

2. Stable Electrical Performance

   Support 4-pin / 6-pin /12-pin terminal configurations; withstand power frequency voltage, guarantee stable signal transmission for measurement and protection BCT.

3. Strong Environmental Adaptability

   Work temperature range: -40℃ ~ +70℃, resistant to vibration, suitable for outdoor substations, industrial power supply and new energy booster stations.

4. Compact & Easy Installation

   Standard flange mounting structure, convenient wiring and routine maintenance.

Typical Application Scenarios

• Medium & large oil immersed power transformers (35kV ~ 500kV)

• Bushing Current Transformer (BCT) secondary lead outlet

• Power substations, photovoltaic & wind farm step-up stations, industrial distribution systems

VRCOOLER supplies standard and customized BCT terminal boxes according to transformer drawings, supporting different terminal layouts, inlet and outlet direction customization.