Guide To Pad Mounted Transformer Load Break Switch
What type of load break switch do you need for your Pad Mounted Transformer? It depends on your transformer's configuration.
What is a transformer load break switch?
A load break switch is a power switch specifically designed for pad-mounted transformers. It operates with a spring mechanism and can safely and quickly break and close the load current using a hot rod outside the transformer. It is suitable for 15kV, 25kV, and 35kV ring network and terminal line power distribution systems.
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Types of pad mounted transformer load break switch
There are three main types of load break switches for transformers: two-position, three-position, and four-position load break switches. Two-position and four-position load break switches are commonly used in pad mounted transformers. They can be utilized for both 3 phase and single phase pad mounted transformers.
How do I choose the load switch for my pad mounted transformer?
A two-position load break switch is specifically designed for radial feed pad mounted transformers. This switch has two states: on and off. Typically, it is used in radial feed transformers to regulate the load current, turning it on and off along the transformer line. It can also be utilized in loop feed transformers. In such cases, three two-position load break switches are required to control the current load on and off for line A, line B, and the transformer's main line.
The four-position load break switch is specially designed for loop feed pad mounted transformers, meeting IEEE and CSA standards. In the loop feed transformer unit, one four-position load break switch is sufficient. It controls the opening and closing of the load current for circuit A, circuit B, and the total AB circuit.
It's important to note that 1 phase pad mounted transformers typically use a four-position load break switch or two two-position load break switches to control the load current on and off for transformer lines A, B, and AB.
Do you have any other questions about pad mounted transformers that we can answer? If you'd like to learn more, check out our Comprehensive Guide to Pad-Mounted Transformers.
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