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Appendix 5: Equipment for Tests
By Mohammad Masoum
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From Power Quality in Power Systems and Electrical Machines
A5.1 THE 9 kVA THREE-PHASE TRANSFORMER BANKA 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
A5.2 THE 4.5 kVA THREE-PHASE TRANSFORMER BANK #1Single-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 #2Single-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 BANKThe 15 kVA, 240/240, ? ? connected bank consists of three 5 kVA...
Copyright Elsevier Inc. 2008 under license agreement with Books24x7
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Power transformers convert power-level voltages from one level or phase configuration to another. They can include features for electrical isolation, power distribution, and control and instrumentation applications.
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Voltage transformers and potential transformers are used to measure voltage in electric circuits. Their main role is to condition (step down) the voltage to be measured to levels suitable for the measuring instrument.
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Distribution transformers are pole-type transformers that supply relatively small amounts of power to residences. They are used at the end of an electrical utility’s delivery system.
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Transformer Test Equipment consists of specialized test modules or systems used to test and/or monitor electrical and mechanical parameters of transformers and other related devices.
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