I am converting from an aeiral distributed, pad mounted, three phase, 300KVA, 12.4KV primary, 208/120 volt transformer bank system (which uses three, single phase, 100KVA, 240/120 volt transformers in a bank) to a 300KVA, 3 phase, 12.4KV, 208/120 volt pad mounted transformer.
My present transformer bank uses PIN insulators between where the overhead primary meets with the primary terminals of the existing transformer bank cosisting of single phase transformers at 100KVA. The secondary of each of these transformers in the transformer bank goes overhead also.
In my design for the new underground fed primary and partially underground distributed secondary pad mounted transformer at 300KVA, I am installing surge protectors where the underground primary meets with the overhead primary above the utility pole at the drip loop.
The reason I am using the expensive surge protectors for the primary feeding the new transformer is that this is the design that I have seen used for this type of installation before.
My concern is that PIN insulators were used for the existing single phase transformer bank which makes up the 3 phase power delivery system to the respective facilty.
Do PIN insulators used on the old design perform essentially the same function as the surge protectors (spike arrestors/suppressors) I am using for the new design??
It seems to me that an insulator suppresses a voltage spike of more than one cycle just like the surge arrestor??
My present transformer bank uses PIN insulators between where the overhead primary meets with the primary terminals of the existing transformer bank cosisting of single phase transformers at 100KVA. The secondary of each of these transformers in the transformer bank goes overhead also.
In my design for the new underground fed primary and partially underground distributed secondary pad mounted transformer at 300KVA, I am installing surge protectors where the underground primary meets with the overhead primary above the utility pole at the drip loop.
The reason I am using the expensive surge protectors for the primary feeding the new transformer is that this is the design that I have seen used for this type of installation before.
My concern is that PIN insulators were used for the existing single phase transformer bank which makes up the 3 phase power delivery system to the respective facilty.
Do PIN insulators used on the old design perform essentially the same function as the surge protectors (spike arrestors/suppressors) I am using for the new design??
It seems to me that an insulator suppresses a voltage spike of more than one cycle just like the surge arrestor??
