Drive Isolation Transformers

Class 7400

Drive Isolation Transformers

Special design considerations must be made for the requirements of both adjustable frequency and dc motor drive power isolation. Allowance for high surge, harmonic and offset currents are taken into account in the design of Square D™ brand drive isolation transformers. Drive isolation transformers are not shielded isolation transformers, but act to lessen transient generation into the supply power and act as a buffer for SCR current surges.

Three-Phase 60 Hz; Class B
(IEEE Standard 597-1983); 460 V Delta Primary

kVA	Catalog No.	Full Capacity Taps	Weight (lbs) ^[1]	Enclosure ^[1]^[2]
460 V Delta Primary, 460Y/265 V Secondary, 150°C Rise
7.5	7T145HDIT	2–5%1 + 1–	180	17D
11	11T145HDIT		180
15	15T145HDIT		190
20	20T145HDIT		210
27	27T145HDIT		250
34	34T145HDIT		295	18D
40	40T145HDIT		350	18D
51	51T145HDIT		445	20D
63	63T145HDIT		465
75	75T145HDIT		550
93	93T145HDIT		845	22D
118	118T145HDIT		920
145	145T145HDIT		1025
175	175T145HDIT		1120	25D
220	220T145HDIT		1200
275	275T145HDIT		1500
330	330T145HDIT		1390
440	440T145HDIT		2700	30D
550	550T145HDIT		3800	30D
460 V Delta Primary, 230Y/132 V Secondary, 150°C Rise
7.5	7T144HDIT	2–5%1 + 1–	180	17D
11	11T144HDIT		180
15	15T144HDIT		190
20	20T144HDIT		210
27	27T144HDIT		250
34	34T144HDIT		295	18D
40	40T144HDIT		350	18D
51	51T144HDIT		445	20D
63	63T144HDIT		465
75	75T144HDIT		550
93	93T144HDIT		845	22D
118	118T144HDIT		920
145	145T144HDIT		1025
175	175T144HDIT		1120	25D
220	220T144HDIT		1200
275	275T144HDIT		1500
330	330T144HDIT		1390
440	440T144HDIT		2700	30D
550	550T144HDIT		3800	30D

Three-Phase 60 Hz; Class B
(IEEE Standard 597-1983); 230 V Delta Primary

kVA	Catalog No.	Full Capacity Taps	Weight (lbs) ^[1]	Enclosure ^[1]^[2]
230 V Delta Primary, 460Y/265 V Secondary, 150°C Rise
7.5	7T143HDIT	2–5%1 + 1–	180	17D
11	11T143HDIT		180
15	15T143HDIT		190
20	20T143HDIT		210
27	27T143HDIT		250
34	34T143HDIT		295	18D
40	40T143HDIT		350	18D
51	51T143HDIT		445	20D
63	63T143HDIT		465
75	75T143HDIT		550
93	93T143HDIT		845	22D
118	118T143HDIT		920
145	145T143HDIT		1025
175	175T143HDIT		1120	25D
220	220T143HDIT		1200
275	275T143HDIT		1500
330	330T143HDIT		1390
440	440T143HDIT		2700	30D
550	550T143HDIT		3800	30D
230 V Delta Primary, 230Y/132 V Secondary, 150°C Rise
7.5	7T142HDIT	2–5%1 + 1–	180	17D
11	11T142HDIT		180
15	15T142HDIT		190
20	20T142HDIT		210
27	27T142HDIT		250
34	34T142HDIT		295	18D
40	40T142HDIT		350	18D
51	51T142HDIT		445	20D
63	63T142HDIT		465
75	75T142HDIT		550
93	93T142HDIT		845	22D
118	118T142HDIT		920
145	145T142HDIT		1025
175	175T142HDIT		1120	25D
220	220T142HDIT		1200
275	275T142HDIT		1500
330	330T142HDIT		1390
440	440T142HDIT		2700	30D
550	550T142HDIT		3800	30D

note

Lugs are furnished by customer.

Supplemental 6: Transformers

Supplemental 6: Transformers

Drive Isolation Transformers

Class 7400

Drive Isolation Transformers

Three-Phase 60 Hz; Class B
(IEEE Standard 597-1983); 460 V Delta Primary

Three-Phase 60 Hz; Class B
(IEEE Standard 597-1983); 230 V Delta Primary

note

Footnotes

Supplemental 6: Transformers

Supplemental 6: Transformers

Drive Isolation Transformers

Class 7400

Drive Isolation Transformers

Three-Phase 60 Hz; Class B (IEEE Standard 597-1983); 460 V Delta Primary

Three-Phase 60 Hz; Class B (IEEE Standard 597-1983); 230 V Delta Primary

note

Footnotes

Three-Phase 60 Hz; Class B
(IEEE Standard 597-1983); 460 V Delta Primary

Three-Phase 60 Hz; Class B
(IEEE Standard 597-1983); 230 V Delta Primary