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What is the difference between an distribution trnansformer and power transformer?
Wiki User
∙ 12y ago
The most obvious difference is their purpose. A CT is used to provide power system measurements to instrumentation - such as relays and metering equipment. These are typically designed to provide 1-5 amps in their secondary sides. A distribution transformer is used to provide power to costumers. These are designed to provide much higher current.
CT's are designed to give a ratio of the primary current to the secondary - not specifically the same voltage. Due to this the voltage on the secondary side will vary depending on load (from a few volts to saturation level voltages). Distribution Transformers provide a constant voltage at a varying current level.
there are other differences as well - size, insulation, primary connection, etc.
Wiki User
∙ 14y ago
Wiki User
∙ 8y agoPower transformers are used in transmission network of higher voltages for step-up and step down application (400 kV, 200 kV, 110 kV, 66 kV, 33kV) and are generally rated above 200MVA.
Distribution transformers are used for lower voltage distribution networks as a means to end user connectivity. (11kV, 6.6 kV, 3.3 kV, 440V, 230V) and are generally rated less than 200 MVA.
Wiki User
∙ 12y agoPower transformers are used in the transmission system, whereas distribution transformers are used in the distribution system. So, essentially, what it comes down to is their capacity and voltage levels.
Wiki User
∙ 9y agoqqq
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An isolation transformer is usually a ferromagnetic transformer. The question needs to be framed more usefully.
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