From Power Quality in Power Systems and Electrical Machines

A5.1 THE 9 kVA THREE-PHASE TRANSFORMER BANK

A Y Y connected three-phase transformer bank with 416/416 V of rated line-to-line voltages consists of three single-phase transformers. The type numbers of the three single-phase transformers are J7065, J7610, and J7065 (bank #1), and the nameplate data are

Powerformer

Dry-type transformer

CAT. NO.: 211-101

3 kVA, single-phase, 60 Hz

High voltage: 240/480 V

Low voltage: 120/240 V

A5.2 THE 4.5 kVA THREE-PHASE TRANSFORMER BANK #1

Single-phase transformers with the nameplate data listed in Section A5.1 are used in transformer bank #1 and are connected in such a way that the rated line-to-line voltages are 240/240 V. Only the two high-voltage windings of each single-phase transformer are employed as primary and secondary, and the rated apparent power of the three-phase transformer bank is therefore 4.5 kVA.

A5.3 THE 4.5 kVA THREE-PHASE TRANSFORMER BANK #2

Single-phase transformers with the nameplate data listed in Section A5.1 having the type numbers J7605, J7606, and J7605 are used in transformer bank #2, and are connected in such a way that the rated line-to-line voltages are 240/240 V. Only the two high-voltage windings of each single-phase transformer are employed as primary and secondary, and the rated apparent power of the three-phase transformer bank is therefore 4.5 kVA.

A5.4 THE 15 kVA THREE-PHASE TRANSFORMER BANK

The 15 kVA, 240/240, ? ? connected bank consists of three 5 kVA...

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