Pad mounted distribution transformers(PMDT) are enclosed distribution transformers installed on ground bases and are widely used in urban power grids, commercial parks, industrial facilities and other scenarios.
Introduction:
Pad mounted distribution transformer is a common device in power distribution systems, mainly used to reduce medium voltage to low voltage for use by commercial, residential or industrial users.
Main structural components:
Core: It is usually made by stacking silicon steel sheets with high magnetic permeability to reduce hysteresis loss and eddy current loss.
Windings: High-voltage side and low-voltage side windings, mostly made of copper (with good electrical conductivity) or aluminum (with lower cost), are wrapped with insulating materials.
Shell: Made of steel plate or aluminum alloy, it features water resistance, dust resistance, corrosion resistance and vandalism resistance. Some models are equipped with ventilation holes or heat sinks.
Cooling system: Mainly natural air cooling, and some large-capacity models are equipped with forced air cooling devices.
Accessories: Including high-voltage bushings, low-voltage outlet terminals, tap changers, fuses, lightning arresters, etc.
Typical application scenarios:
Low-voltage power supply can be provided for residential areas.
It can handle the electricity consumption of shopping malls and office areas.
Suitable for industrial applications, it can provide stable power transmission for equipment.
It can also be connected to solar energy systems or wind power systems and is equipped with medium-voltage output.
Precautions:
The load of the transformer is fixed and needs to be matched with the corresponding load; otherwise, it cannot operate.
Supports lightning protection, especially suitable for areas with frequent lightning, and the configuration of lightning arresters can be strengthened. Regular performance checks are needed to prevent accidents.
It is necessary to prevent oil leakage and comply with environmental protection requirements. If there are any abandoned transformers, they should be dealt with in a timely manner.
Development trend:
Built-in sensors: Real-time monitoring of temperature, load current, oil level and other data, and transmission to the background through the Internet of Things to achieve remote monitoring and fault early warning.
Energy-saving design: Low-loss core materials and high-efficiency windings are adopted to reduce no-load and load losses, in line with the trend of "green energy".
