Page 1
Dry Type Transformers
Low Noise
Aluminum
Three-Phase TP-1
Product Description
These low noise transformers are designed to operate at reduced
noise levels. The vibrations within the magnetic steel core were
greatly reduced, thus lowering the humming of the transformer
from 3 to 5 dB less than NEMA/ANSI standards. Available in
Aluminum or Copper windings, with either a 150°C, 115°C or
80°C rise.
Application
Type QL low noise transformers are ideal when quiet operation is
required such as near offices, in school buildings, or hospitals.
Although they are inherently quieter, installation can greatly
influence their noise level and therefore care should be taken in
following acoustical principles as well as proper installation
procedures. Closets and corners should be avoided as they act as
megaphones by seemingly increasing noise levels.
Section 10
Type QL Lo w Nois e Transformer (fro nt panel removed)
150°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 Volts Delta 208Y/120 Volts 15 (+2, -4 2.5%) 12 240 XV371 9T83B3141
480 Volts Delta 208Y/120 Volts 30 (+2, -4 2.5%) 12 334 Y372A 9T83B3142
480 Volts Delta 208Y/120 Volts 45 (+2, -4 2.5%) 12 415 XV373 9T83B3143
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 620 XV374 9T83B3144
480 Volts Delta 208Y/120 Volts 112.5 (+2, -4 2.5%) 12 765 XV375 9T83B3145
480 Volts Delta 208Y/120 Volts 150 (+2, -4 2.5%) 12 1070 XV376 9T83B3146
480 Volts Delta 208Y/120 Volts 225 (+2, -4 2.5%) 12 1590 XV377 9T83B3147
480 Volts Delta 208Y/120 Volts 300 (+2, -4 2.5%) 12 1820 YF378 9T83B3148
480 Volts Delta 208Y/120 Volts 500 (+2, -2 2.5%) 12 3400 YF379 9T83B3149
1
Weight (Lbs) Size Number
115°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 Volts Delta 208Y/120 Volts 15 (+2, -4 2.5%) 12 240 XV371 9T83B3141G15
480 Volts Delta 208Y/120 Volts 30 (+2, -4 2.5%) 12 334 XV372 9T83B3142G15
480 Volts Delta 208Y/120 Volts 45 (+2, -4 2.5%) 12 415 XV373 9T83B3143G15
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 620 XV374 9T83B3144G15
480 Volts Delta 208Y/120 Volts 112.5 (+2, -4 2.5%) 12 1070 XV376 9T83B3145G15
480 Volts Delta 208Y/120 Volts 150 (+2, -4 2.5%) 12 1590 XV377 9T83B3146G15
480 Volts Delta 208Y/120 Volts 225 (+2, -4 2.5%) 12 1820 YF378 9T83B3147G15
480 Volts Delta 208Y/120 Volts 300 (+2, -4 2.5%) 12
1
Weight (Lbs) Size Number
80°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 Volts Delta 208Y/120 Volts 15 (+2, -4 2.5%) 12 334 XV372 9T83B3141G80
480 Volts Delta 208Y/120 Volts 30 (+2, -4 2.5%) 12 415 XV373 9T83B3142G80
480 Volts Delta 208Y/120 Volts 45 (+2, -4 2.5%) 12 620 XV374 9T83B3143G80
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 765 XV375 9T83B3144G80
480 Volts Delta 208Y/120 Volts 112.5 (+2, -4 2.5%) 12
480 Volts Delta 208Y/120 Volts 150 (+2, -4 2.5%) 12
480 Volts Delta 208Y/120 Volts 225 (+2, -4 2.5%) 12 1820 YF378 9T83B3147G80
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 765 XV375 9T83B3874G90
1
See page 10-45 for wiring diagrams.
1
Weight (Lbs) Size Number
10-22
BuyLog™Catalog
Rev. 11/13
Data subject to change
without notice
Page 2
Dry Type Transformers
Section 10
Low Noise
Copper
Three-Phase TP-1
150°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 Volts Delta 208Y/120 Volts 15 (+2, -4 2.5%) 12 250 XV371 9T83C9141
480 Volts Delta 208Y/120 Volts 30 (+2, -4 2.5%) 12 377 XV372 9T83C9142
480 Volts Delta 208Y/120 Volts 45 (+2, -4 2.5%) 12 490 XV373 9T83C9143
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 710 XV374 9T83C9144
480 Volts Delta 208Y/120 Volts 112.5 (+2, -4 2.5%) 12 949 XV375 9T83C9145
480 Volts Delta 208Y/120 Volts 150 (+2, -4 2.5%) 12 1190 XV376 9T83C9146
480 Volts Delta 208Y/120 Volts 225 (+2, -4 2.5%) 12 1710 XV377 9T83C9147
480 Volts Delta 208Y/120 Volts 300 (+2, -4 2.5%) 12 3150 YF378 9T83C9148
480 Volts Delta 208Y/120 Volts 500 (+2, -2 2.5%) 12 4050 YF379 9T83C9149
115°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 Volts Delta 208Y/120 Volts 15 (+2, -4 2.5%) 12 250 XV371 9T83C9141G15
480 Volts Delta 208Y/120 Volts 30 (+2, -4 2.5%) 12 377 XV372 9T83C9142G15
480 Volts Delta 208Y/120 Volts 45 (+2, -4 2.5%) 12 490 XV373 9T83C9143G15
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 710 XV374 9T83C9144G15
480 Volts Delta 208Y/120 Volts 112.5 (+2, -4 2.5%) 12 949 XV375 9T83C9145G15
480 Volts Delta 208Y/120 Volts 150 (+2, -4 2.5%) 12 1710 XV377 9T83C9146G15
480 Volts Delta 208Y/120 Volts 225 (+2, -4 2.5%) 12 3150 YF378 9T83C9147G15
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 710 XV374 9T83C9874G20
480 Volts Delta 208Y/120 Volts 112.5 (+2, -4 2.5%) 12 949 XV375 9T83C9875G20
480 Volts Delta 208Y/120 Volts 300 (+2, -4 2.5%) 12 4050 L39AA 9T83C9878G20
1
1
Weight (Lbs) Size Number
Weight (Lbs) Size Number
80°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 Volts Delta 208Y/120 Volts 15 (+2, -4 2.5%) 12 377 XV372 9T83C9141G80
480 Volts Delta 208Y/120 Volts 30 (+2, -4 2.5%) 12 490 XV373 9T83C9142G80
480 Volts Delta 208Y/120 Volts 45 (+2, -4 2.5%) 12 710 XV374 9T83C9143G80
480 Volts Delta 208Y/120 Volts 75 (+2, -4 2.5%) 12 949 XV375 9T83C9144G80
480 Volts Delta 208Y/120 Volts 112.5 (+2, -4 2.5%) 12 1190 XV376 9T83C9145G80
480 Volts Delta 208Y/120 Volts 150 (+2, -4 2.5%) 12
480 Volts Delta 208Y/120 Volts 225 (+2, -4 2.5%) 12 3150 YF378 9T83C9147G80
480 Volts Delta 208Y/120 Volts 300 (+2, -4 2.5%) 12
1
See page 10-45 for wiring diagrams.
1
Weight (Lbs) Size Number
Rev. 11/13
Data subject to change
without notice
BuyLog™Catalog
10-23
Page 3
Dry Type Transformers
Section 10
Noise Isolation — Guard I (Electrostatic Shield)
Aluminum
Three-Phase TP-1
150°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 208Y/120 15 (+2, -4 2.5%) 12 240 XV371 9T83B3871G03
480 208Y/120 30 (+2, -4 2.5%) 12 334 XV372 9T83B3872G03
480 208Y/120 45 (+2, -4 2.5%) 12 415 XV373 9T83B3873G03
480 208Y/120 75 (+2, -4 2.5%) 12 620 XV374 9T83B3874G03
480 208Y/120 112.5 (+2, -4 2.5%) 12 765 XV375 9T83B3875G03
480 208Y/120 150 (+2, -4 2.5%) 12 1070 XV376 9T83B3876G03
480 208Y/120 225 (+2, -4 2.5%) 12 1590 XV377 9T83B3877G03
480 208Y/120 300 (+2, -4 2.5%) 12 1820 YF378 9T83B3878G03
480 208Y/120 500 (+2, -2 2.5%) 12 3400 YF379 9T83B3879G03
480 208Y/120 750 (+2, -2 2.5%) 12 3250 FC67 9T40G0010G03
480 208Y/120 1000 (+2, -2 2.5%) 12 3250 FC68 9T40G0011G03
115°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 208Y/120 15 (+2, -4 2.5%) 12 240 XV371 9T83B3871G13
480 208Y/120 30 (+2, -4 2.5%) 12 334 XV372 9T83B3872G13
480 208Y/120 45 (+2, -4 2.5%) 12 415 XV373 9T83B3873G13
480 208Y/120 75 (+2, -4 2.5%) 12 620 XV374 9T83B3874G13
480 208Y/120 112.5 (+2, -4 2.5%) 12 1070 XV376 9T83B3875G13
480 208Y/120 150 (+2, -4 2.5%) 12 1590 XV377 9T83B3876G13
480 208Y/120 225 (+2, -4 2.5%) 12 1820 YF378 9T83B3877G13
480 208Y/120 300 (+2, -4 2.5%) 12 3400 L39AA 9T83B3878G13
480 208Y/120 500 (+2, -2 2.5%) 12 3250 FC67 9T40G0009G53
1
1
Weight (Lbs) Size Number
Weight (Lbs) Size Number
80°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 208Y/120 15 (+2, -4 2.5%) 12 334 XV372 9T83B3871G83
480 208Y/120 30 (+2, -4 2.5%) 12 415 XV373 9T83B3872G83
480 208Y/120 45 (+2, -4 2.5%) 12 620 XV374 9T83B3873G83
480 208Y/120 75 (+2, -4 2.5%) 12 765 XV375 9T83B3874G83
480 208Y/120 112.5 (+2, -4 2.5%) 12 1590 XV377 9T83B3875G83
480 208Y/120 150 (+2, -4 2.5%) 12 850 FC77 9T40G0006G83
480 208Y/120 225 (+2, -4 2.5%) 12 1820 YF378 9T83B3877G83
480 208Y/120 300 (+2, -4 2.5%) 12 3400 L39AA 9T83B3878G83
1
See page 10-45 for wiring diagrams.
Note: Product numbers beginning with 9T4 have fan-assisted cooling.
1
Weight (Lbs) Size Number
10-24
BuyLog™Catalog
Rev. 11/13
Data subject to change
without notice
Page 4
Dry Type Transformers
Section 10
Noise Isolation — Guard I (Electrostatic Shield)
Copper
Three-Phase TP-1
150°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 208Y/120 15 (+2, -4 2.5%) 12 250 XV371 9T83C9871G03
480 208Y/120 30 (+2, -4 2.5%) 12 377 XV372 9T83C9872G03
480 208Y/120 45 (+2, -4 2.5%) 12 490 XV373 9T83C9873G03
480 208Y/120 75 (+2, -4 2.5%) 12 710 XV374 9T83C9874G03
480 208Y/120 112.5 (+2, -4 2.5%) 12 949 XV375 9T83C9875G03
480 208Y/120 150 (+2, -4 2.5%) 12 1190 XV376 9T83C9876G03
480 208Y/120 225 (+2, -4 2.5%) 12 1710 XV377 9T83C9877G03
480 208Y/120 300 (+2, -4 2.5%) 12 3150 YF378 9T83C9878G03
480 208Y/120 500 (+2, -2 2.5%) 12 4050 YF379 9T83C9879G03
480 208Y/120 750 (+2, -2 2.5%) 12 4030 FC67 9T45G0010G03
480 208Y/120 1000 (+2, -2 2.5%) 12 4030 FC68 9T45G0011G03
115°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 208Y/120 15 (+2, -4 2.5%) 12 250 XV371 9T83C9871G13
480 208Y/120 30 (+2, -4 2.5%) 12 377 XV372 9T83C9872G13
480 208Y/120 45 (+2, -4 2.5%) 12 490 XV373 9T83C9873G13
480 208Y/120 75 (+2, -4 2.5%) 12 710 XV374 9T83C9874G13
480 208Y/120 112.5 (+2, -4 2.5%) 12 949 XV375 9T83C9875G13
480 208Y/120 150 (+2, -4 2.5%) 12 1710 XV377 9T83C9876G13
480 208Y/120 225 (+2, -4 2.5%) 12 3150 YF378 9T83C9877G13
480 208Y/120 300 (+2, -4 2.5%) 12 4050 L39AA 9T83C9878G13
1
1
Weight (Lbs) Size Number
Weight (Lbs) Size Number
80°C Rise NEMA 2
Input Output Wiring Approx Net Frame Product
Voltage Voltage kVA Taps Diagram No.
480 208Y/120 15 (+2, -4 2.5%) 12 377 XV372 9T83C9871G83
480 208Y/120 30 (+2, -4 2.5%) 12 490 XV373 9T83C9872G83
480 208Y/120 45 (+2, -4 2.5%) 12 710 XV374 9T83C9873G83
480 208Y/120 75 (+2, -4 2.5%) 12 949 XV375 9T83C9874G83
480 208Y/120 112.5 (+2, -4 2.5%) 12 1190 XV376 9T83C9875G83
480 208Y/120 150 (+2, -4 2.5%) 12 1710 XV377 9T83C9876G83
480 208Y/120 225 (+2, -4 2.5%) 12 3150 YF378 9T83C9877G83
480 208Y/120 300 (+2, -4 2.5%) 12 4050 L39AA 9T83C9878G83
1
See page 10-45 for wiring diagrams.
1
Weight (Lbs) Size Number
Rev. 11/13
Data subject to change
without notice
BuyLog™Catalog
10-25
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