an interlocking device
150 feet
There's very little point in having a distribution transformer if its secondary winding isn't connected to a load! So, to answer your question, a 'secondary system' (by which you, presumably, mean 'load'), isn't 'essential' to a distribution transformer, it could just sit there doing nothing!
A voltage appears between the terminal points of the secondary winding
2
false
150 feet
200 amps
72kVA
200 amp/25ft long cable
There's very little point in having a distribution transformer if its secondary winding isn't connected to a load! So, to answer your question, a 'secondary system' (by which you, presumably, mean 'load'), isn't 'essential' to a distribution transformer, it could just sit there doing nothing!
A voltage appears between the terminal points of the secondary winding
Primary electrical distribution carries medium voltage power to distribution transformers near the customers. Secondary electrical distribution transfers the power from the transformer to the households.
high voltage cable with loadbreak elbows
2
1 mile
The highest secondary sector benefit is income distribution and loss from lack of market.
Cable with military-style class L connectors