Page 12-5

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Dry Type 600 Volts and Below

Special Voltage, Shielded Isolation, Drive Isolation and Buck Boost Transformers Class 7400

Special Voltage Transformers—Shielded and Non-shielded

Square D offers special voltage transformers built to customer specifications. Many options such as lower sound level, copper windings, special frequency, etc. are available but not listed below. Contact your nearest Square D/Schneider Electric sales office for details.

All two-winding transformers are "isolating" or "insulating" because there is no electrical connection between the primary and secondary windings. Additionally, critical equipment might require an electrostatic shield be furnished between primary and secondary to attenuate some of the source line interference and common-mode noise.

Protection from transverse-mode transients is obtained by adding surge suppressors and filters to the shielded isolation transformer.

Single phase units are listed on page 12-2.

Electrostatic Shield is indicated by the letters IS at the end of the catalog number.

Three Phase 480 V Delta Primary
208Y/120 V Secondary 60 Hz with Electrostatic Shield, cULus Listed
kVA	Catalog Number^a	Price	Stocked Voltage Codes	Degree C Temp. Rise	Weight (Pounds) ^c	Enclosure ^b ^c
9	9T2FIS	$ 2311.	2–5%FCBN	115	235	14C
15	15T3HIS	2878.	6–2.5%2 + 4–	150	200	17D
30	30T3HIS	3625.	6–2.5%2 + 4–	150	250	17D
45	45T3HIS	4360.	6–2.5%2 + 4–	150	340	18D
75	75T3HIS	6567.	6–2.5%2 + 4–	150	500	19D
112.5	112T3HIS	8550.	6–2.5%2 + 4–	150	815	21D
150	150T3HIS	10908.	6–2.5%2 + 4–	150	800	22D
225	225T3HIS	14609.	6–2.5%2 + 4–	150	1025	24D
300	300T3HIS	19174.	6–2.5%2 + 4–	150	1450	25D
500	500T68HIS	29327.	4–2.5%2 + 2–	150	2100	30D
208 V Delta Primary 208Y/120 V Secondary 60 Hz with Electrostatic Shield, cULus Listed
9	9T85FIS	$ 2311.	2–5%FCBN	115	235	14C
15	15T85HIS	2878.	2–5%FCBN	150	200	17D
30	30T85HIS	3625.	2–5%FCBN	150	250	17D
45	45T85HIS	4360.	2–5%FCBN	150	340	18D
75	75T85HIS	6567.	2–5%FCBN	150	500	19D
112.5	112T85HIS	9190.	2–5%FCBN	150	815	21D
150	150T85HIS	10908.	2–5%FCBN	150	800	22D
225	225T85HIS	14609.	2–5%FCBN	150	1025	24D
300	300T85HIS	19174.	2–5%FCBN	150	1450	25D
500	500T85HIS	29327.	2–5%FCBN	150	2100	30D

Shielded Transformers with Filters—Three Phase

Additional attenuation of transverse (across-the-line) surges and transients is available with the addition of primary surge suppression and secondary filters. Surge suppression and filtering are indicated by the letters FIL at the end of the catalog number.

480 V Delta Primary 208Y/120 V Secondary 60 Hz with Electrostatic Shield, Surge Suppressors and Filter – cULus Listed
kVA	Catalog Number^a	Price	Full Capacity Taps	Degree C Temp. Rise	Weight (Pounds) ^c	Enclosure ^b ^c
15	15T3HISFIL	$ 6202.	6–2.5%2 + 4–	150	265	19D
30	30T3HISFIL	6948.	6–2.5%2 + 4–	150	295	19D
45	45T3HISFIL	8425.	6–2.5%2 + 4–	150	390	19D
75	75T3HISFIL	10633.	6–2.5%2 + 4–	150	610	21D
112.5	112T3HISFIL	13210.	6–2.5%2 + 4–	150	840	22D
150	150T3HISFIL	15568.	6–2.5%2 + 4–	150	1100	25D
225	225T3HISFIL	19638.	6–2.5%2 + 4–	150	1400	26D
208 V Delta Primary 208Y/120 V Secondary 60 Hz with Electrostatic Shield, Surge Suppressors and Filter – cULus Listed
15	15T85HISFIL	$ 6202.	2–5% FCBN	150	265	19D
30	30T85HISFIL	6948.	2–5% FCBN	150	295	19D
45	45T85HISFIL	8425.	2–5% FCBN	150	390	19D
75	75T85HISFIL	10633.	2–5% FCBN	150	610	21D
112.5	112T85HISFIL	13210.	2–5% FCBN	150	840	22D
150	150T85HISFIL	15568.	2–5% FCBN	150	1100	25D
225	225T85HISFIL	19638.	2–5% FCBN	150	1400	26D

FCBN = Full capacity below normal

Lugs: Furnished by customer.

Taps on transformers 225 kVA and larger may vary in 3% to 5% steps to obtain best design.

Product Data Bulletin 7400PD9202 describes technical details of shielded and filtered transformers.

Drive Isolation Transformers—Three Phase

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 Company 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. cULus Listed.

Three Phase 60 Hz Class B (IEEE Standard 597-1983)
kVA	Catalog Number^a	Price	Stock Voltage Codes	Degree C Temp. Rise	Weight (Pounds) ^c	Enclosure ^b ^c
7.5	7T( )HDIT	$ 2231.	144, 145	150	180	17D
11	11T( )HDIT	2649.	144, 145	150	180	17D
15	15T( )HDIT	2732.	144, 145	150	190	17D
20	20T( )HDIT	3275.	144, 145	150	210	17D
27	27T( )HDIT	3360.	144, 145	150	250	17D
34	34T( )HDIT	3696.	144, 145	150	295	18D
40	40T( )HDIT	4202.	144, 145	150	350	18D
51	51T( )HDIT	4913.	144, 145	150	445	20D
63	63T( )HDIT	5346.	144, 145	150	465	20D
75	75T( )HDIT	6249.	144, 145	150	550	20D
93	93T( )HDIT	8010.	144, 145	150	845	22D
118	118T( )HDIT	8922.	145	150	920	22D
145	145T( )HDIT	10004.	145	150	1025	22D
175	175T( )HDIT	11546.	145	150	1120	25D
220	220T( )HDIT	14112.	145	150	1200	25D
275	275T( )HDIT	18858.	145	150	1500	25D
330	330T( )HDIT	19844.	145	150	1390	25D
440	440T( )HDIT	24325.	None	150	2700	30D
550	550T( )HDIT	30222.	None	150	3800	30D

Voltage Codes
Code	Primary	Secondary	Full Capacity Taps
142 143 144	230 Delta 230 Delta 460 Delta	230Y/132 460Y/265 230Y/132	2–5%1 + 1–
145 146 147	460 Delta 575 Delta 575 Delta	460Y/265 230Y/132 460Y/265	2–5%1 + 1–

To Complete Catalog Number:

1.	Select the voltage required from chart.

2.	Insert the voltage code number in place of the ( ) in the catalog number.

See Handout 7460HO9501 for additional information.

Single Phase—Buck and Boost Transformers

Buck and Boost transformers are isolating transformers that have 120 X 240 volt primaries and either 12/24 or 16/32 volt secondaries. When used as isolating transformers they carry the full load stated on the nameplate. By special interconnection of the windings, an auto-transformer is obtained. When used this way for bucking or boosting small voltage changes, the kVA load they carry is large compared to their physical size.

Note:

When used to supply a 3-phase, 4-wire load, the source must be 3-phase, 4-wire.

Single Phase
UL/cULus Listed. Copper Windings.
kVA	120 x 240 V Primary 60 Hz^a			240 x 480 V Primary 60 Hz^a		Degree C Temp. Rise	Weight^c (Pounds)	Enclosure ^b ^c
kVA	12/24 V Secondary	16/32 V Secondary	Price	24/48 V Secondary	Price	Degree C Temp. Rise	Weight^c (Pounds)	Enclosure ^b ^c
.05	50SV43A	50SV46A	$ 103.	50SV82A	$ 142.	55	4.2	1A
.10	100SV43A	100SV46A	123.	100SV82A	172.	55	4.5	2A
.15	150SV43A	150SV46A	138.	150SV82A	193.	55	6.2	3A
.25	250SV43B	250SV46B	164.	250SV82B	230.	80	10.5	4A
.50	500SV43B	500SV46B	210.	500SV82B	294.	80	13.8	5A
.75	750SV43F	750SV46F	276.	750SV82F	387.	115	15.5	6A
1.0	1S43F	1S46F	338.	1S82F	474.	115	21.2	7A
1.5	1.5S43F	1.5S46F	415.	1.5S82F	581.	115	30.1	8A
2.0	2S43F	2S46F	536.	2S82F	750.	115	39.1	9A
3.0	3S43F	3S46F	740.	3S82F	1036.	115	60	^d

^aCatalog Numbers shown in bold type are available from Distribution Center.

^bFor enclosure styles, see Dimensions Table, page 12-10.

^cNot for construction. Contact your nearest Square D/Schneider Electric sales office for certified prints.

^dDimensions: 14.5" high x 8.6" wide x 6.5" deep.

Lugs: Furnished by customer

For additional assistance selecting the proper products for your application, see the electronic Buck & Boost Transformer Calculator, available on www.SquareD.com under Free Software and Online Tools.

See Bulletin 7414PD9301 for application tables and wiring diagrams for buck and boost transformers.


PE2		Discount Schedule

9/8/03

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