Voltage transformers (VT) are key equipment used in power systems to convert high voltage to low voltage (usually 100V or 100/√3V) for use in measuring instruments, relay protection devices and automatic control systems. The voltage transformer consists of an iron core (stacked silicon steel sheets), primary/secondary windings (enameled wire wound), insulating housing (porcelain sleeve/epoxy resin), connecting terminals, etc. The size and assembly logic of parts of different specifications (such as 10kV/35kV voltage levels, oil-immersed/dry type) vary greatly, but the core processes (such as winding embedding, insulation fixing) have standardized characteristics, and the modular design can quickly switch tooling to adapt to multiple models.
Key components of the voltage transformer assembly line:
Conveying system: Adopt precision roller conveyor line or double-speed chain conveyor line, and cooperate with positioning tooling (with mechanical limit and vacuum adsorption) to ensure the positioning accuracy of workpieces at each station (within ±0.1mm).
Core technologies of voltage transformer assembly line:
1. Fully automatic CNC winding machine (equipped with servo motor and precision wire spreader) supports high-speed winding of enameled wire (copper/aluminum wire). It can monitor winding tension (to prevent wire breakage or loosening) and turn count (error ≤1 turn), and automatically complete the binding and fixing of the starting and ending points of the winding.
2. Adaptation characteristics: For windings of different voltage levels (such as 10kV and 110kV)(thick wire diameter on the primary side, few turns; thin wire diameter on the secondary side, multiple turns), parameters can be quickly switched through the program to realize multi-specification winding mixed wire production.
