Page 1
Transformers
General Purpose Transformers in Enclosures
Dry-Type/Cased
Isolated
General Purpose
Single-Phase
General Information
The complete family of transformers from GE provide quiet,
reliable transformer operation.
All of the dry-type transformers through 1,000 kVA are UL listed
under the requirements of Standard 506 and 1561. In addition,
each transformer meets the requirements of NEMA ST-20, 1992.
Type QB, QMS, and QMS 3 models are C-UL listed.
General-purpose transformers are rated 600 Volts and below
for supplying appliance, lighting, and power loads from electrical
distribution systems. Standard distribution voltages are 600, 480,
and 240 Volts; standard load voltages are 480, 240, 208, and 120
Volts. The transformer is used to obtain the load voltage from the
distribution voltage. Since no vaults are required for installation,
these transformers can be located right at the load to provide the
correct voltage for the application. This eliminates the need for
long, costly, low-voltage feeders.
Construction—Types QB, QMS, and QMS 3
Core and coils are contained within a NEMA 3R nonventilated
weatherproof enclosure. Type QB, QMS, and QMS 3 units feature
encapsulated core and coils.
Type QB, .050 kVA-3 kVA, Si ngle- Phase
Type QMS, 5 kVA-2 5 k VA , Sing le-Phase
Section 14
.050 - 3 kVA Indoor/Outdoor Type QB UL Listed C-UL Listed
Wiring Product
Input Voltage Output Voltage KVA Frequency (Hz) Taps Diagram No.
240 x 480 Volts, 480 Volts 120/240 Volts 0.05 60 Hz No taps 1 9T51B0002
240 x 480 Volts 120/240 Volts 0.05 50/60 Hz No taps 1 9T51B0502
240 x 480 Volts, 480 Volts 120/240 Volts 0.075 60 Hz No taps 1 9T51B0003
240 x 480 Volts 120/240 Volts 0.075 50/60 Hz No taps 1 9T51B0503
240 x 480 Volts, 480 Volts 120/240 Volts 0.1 60 Hz No taps 1 9T51B0004
240 x 480 Volts 120/240 Volts 0.1 50/60 Hz No taps 1 9T51B0504
240 x 480 Volts, 480 Volts 120/240 Volts 0.15 60 Hz No taps 1 9T51B0005
240 x 480 Volts 120/240 Volts 0.15 50/60 Hz No taps 1 9T51B0505
240 x 480 Volts, 480 Volts 120/240 Volts 0.25 60 Hz No taps 1 9T51B0007
240 x 480 Volts 120/240 Volts 0.25 50/60 Hz No taps 1 9T51B0507
240 x 480 Volts, 480 Volts 120/240 Volts 0.5 60 Hz No taps 1 9T51B0008
240 x 480 Volts 120/240 Volts 0.5 50/60 Hz No taps 1 9T51B0508
240 x 480 Volts, 480 Volts 120/240 Volts 0.75 60 Hz No taps 1 9T51B0009
240 x 480 Volts 120/240 Volts 0.75 50/60 Hz No taps 1 9T51B0509
240 x 480 Volts, 480 Volts 120/240 Volts 1 60 Hz No taps 1 9T51B0010
240 x 480 Volts 120/240 Volts 1 50/60 Hz No taps 1 9T51B0510
240 x 480 Volts, 480 Volts 120/240 Volts 1.5 60 Hz No taps 1 9T51B0011
240 x 480 Volts 120/240 Volts 1.5 50/60 Hz No taps 1 9T51B0511
240 x 480 Volts, 480 Volts 120/240 Volts 2 60 Hz No taps 1 9T51B0012
240 x 480 Volts 120/240 Volts 2 50/60 Hz No taps 1 9T51B0512
240 x 480 Volts, 480 Volts 120/240 Volts 3 60 Hz No taps 1 9T51B0013
240 x 480 Volts 120/240 Volts 3 50/60 Hz No taps 1 9T51B0513
480 Volts 120/240 Volts 0.25 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0547
480 Volts 120/240 Volts 0.5 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0548
480 Volts 120/240 Volts 0.75 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0549
480 Volts 120/240 Volts 1 60 Hz (2) 5% taps below rated primary volts 2 9T51B0050
480 Volts 120/240 Volts 1 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0550
480 Volts 120/240 Volts 1.5 60 Hz (2) 5% taps below rated primary volts 2 9T51B0051
480 Volts 120/240 Volts 1.5 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0551
480 Volts 120/240 Volts 2 60 Hz (2) 5% taps below rated primary volts 2 9T51B0052
480 Volts 120/240 Volts 2 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0552
480 Volts 120/240 Volts 3 60 Hz (2) 5% taps below rated primary volts 2 9T51B0053
480 Volts 120/240 Volts 3 60 Hz (4) 2 1/2% taps: 2 above and 3 9T51B0135
480 Volts 120/240 Volts 3 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0553
1
See page 14-14 for wiring diagrams.
2 below rated primary volts
1
Number GO-90A
Control Catalog
14-9
Page 2
Transformers
Section 14
General Purpose Transformers in Enclosures
Dry-Type/Cased
Isolated
General Purpose
Single-Phase
.050 - 3 kVA Indoor/Outdoor Type QB UL Listed C-UL Listed (Continued)
Wiring Product
Input Voltage Output Voltage KVA Frequency (Hz) Taps Diagram No.
600 Volts 120/240 Volts 0.05 60 Hz No taps 5 9T51B0082
600 Volts 120/240 Volts 0.075 60 Hz No taps 5 9T51B0083
600 Volts 120/240 Volts 0.1 60 Hz No taps 5 9T51B0084
600 Volts 120/240 Volts 0.1 50/60 Hz No taps 5 9T51B0584
600 Volts 120/240 Volts 0.15 60 Hz No taps 5 9T51B0085
600 Volts 120/240 Volts 0.25 60 Hz No taps 5 9T51B0087
600 Volts 120/240 Volts 0.25 50/60 Hz No taps 5 9T51B0587
600 Volts 120/240 Volts 0.25 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0567
600 Volts 120/240 Volts 0.5 60 Hz No taps 5 9T51B0088
600 Volts 120/240 Volts 0.5 50/60 Hz No taps 5 9T51B0588
600 Volts 120/240 Volts 0.5 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0568
600 Volts 120/240 Volts 0.75 60 Hz No taps 5 9T51B0089
600 Volts 120/240 Volts 0.75 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0569
600 Volts 120/240 Volts 1 60 Hz No taps 5 9T51B0090
600 Volts 120/240 Volts 1 60 Hz (2) 5% taps below rated primary volts 2 9T51B0070
600 Volts 120/240 Volts 1 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0570
600 Volts 120/240 Volts 1.5 60 Hz No taps 5 9T51B0091
600 Volts 120/240 Volts 1.5 60 Hz (2) 5% taps below rated primary volts 2 9T51B0071
600 Volts 120/240 Volts 1.5 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0571
600 Volts 120/240 Volts 2 60 Hz No taps 5 9T51B0092
600 Volts 120/240 Volts 2 60 Hz (2) 5% taps below rated primary volts 2 9T51B0072
600 Volts 120/240 Volts 2 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0572
600 Volts 120/240 Volts 3 60 Hz No taps 5 9T51B0093
600 Volts 120/240 Volts 3 60 Hz (2) 5% taps below rated primary volts 2 9T51B0073
600 Volts 120/240 Volts 3 50/60 Hz (2) 5% taps below rated primary volts 2 9T51B0573
1
Number GO-90A
5 - 25 kVA Indoor/Outdoor Type QMS 115°C Rise UL Listed C-UL Listed
Wiring Product
Input Voltage Output Voltage KVA Frequency (Hz) Taps Diagram No.
240 x 480 Volts 120/240 Volts 5 60 Hz No taps 1 9T21B1004G02
240 x 480 Volts, 480 Volts 120/240 Volts 5 50/60 Hz No taps 1 9T21B1055G02
240 x 480 Volts 120/240 Volts 7.5 60 Hz No taps 1 9T21B1005G02
240 x 480 Volts, 480 Volts 120/240 Volts 7.5 50/60 Hz No taps 1 9T21B1056G02
240 x 480 Volts 120/240 Volts 10 60 Hz No taps 1 9T21B1006G02
240 x 480 Volts, 480 Volts 120/240 Volts 10 50/60 Hz No taps 1 9T21B1057G02
240 x 480 Volts 120/240 Volts 15 60 Hz No taps 1 9T21B9103
240 x 480 Volts, 480 Volts 120/240 Volts 15 50/60 Hz No taps 1 9T21B9133
240 x 480 Volts 120/240 Volts 25 60 Hz No taps 1 9T21B9104
240 x 480 Volts, 480 Volts 120/240 Volts 25 50/60 Hz No taps 1 9T21B9134
480 Volts 120/240 Volts 5 60 Hz (2) 5% taps below rated primary volts 2 9T21B1007G02
480 Volts 120/240 Volts 5 60 Hz (4) 2 1/2% taps: 2 above and 3 9T21B1013G02
480 Volts 120/240 Volts 7.5 60 Hz (2) 5% taps below rated primary volts 2 9T21B1008G02
480 Volts 120/240 Volts 7.5 60 Hz (4) 2 1/2% taps: 2 above and 3 9T21B1014G02
480 Volts 120/240 Volts 10 60 Hz (2) 5% taps below rated primary volts 2 9T21B1009G02
480 Volts 120/240 Volts 10 60 Hz (4) 2 1/2% taps: 2 above and 3 9T21B1015G02
480 Volts 120/240 Volts 15 60 Hz (2) 5% taps below rated primary volts 2 9T21B9105
480 Volts 120/240 Volts 15 60 Hz (4) 2 1/2% taps: 2 above and 3 9T21B9109
480 Volts 120/240 Volts 25 60 Hz (2) 5% taps below rated primary volts 2 9T21B9106
480 Volts 120/240 Volts 25 60 Hz (4) 2 1/2% taps: 2 above 3 9T21B9110
600 Volts 120/240 Volts 5 60 Hz No taps 5 9T21B1016G02
600 Volts 120/240 Volts 5 60 Hz (2) 5% taps below rated primary volts 2 9T21B1019G02
600 Volts 120/240 Volts 7.5 60 Hz No taps 5 9T21B1017G02
600 Volts 120/240 Volts 7.5 60 Hz (2) 5% taps below rated primary volts 2 9T21B1020G02
600 Volts 120/240 Volts 10 60 Hz No taps 5 9T21B1018G02
600 Volts 120/240 Volts 10 60 Hz (2) 5% taps below rated primary volts 2 9T21B1021G02
600 Volts 120/240 Volts 15 60 Hz No taps 5 9T21B9111
600 Volts 120/240 Volts 15 60 Hz (2) 5% taps below rated primary volts 2 9T21B9113
600 Volts 120/240 Volts 25 60 Hz No taps 5 9T21B9112
600 Volts 120/240 Volts 25 60 Hz (2) 5% taps below rated primary volts 2 9T21B9114
1
See page 14-14 for wiring diagrams.
2 below rated primary volts
2 below rated primary volts
2 below rated primary volts
2 below rated primary volts
2 below rated primary volts
1
Number GO-90C
14-10
Control Catalog
Page 3
Transformers
Section 14
General Purpose Transformers in Enclosures
Dry-Type/Cased
Isolated
General Purpose
Single-Phase
.050 - 3 kVA Indoor/Outdoor Type QB UL Listed C-UL Listed
Wiring Product
Input Voltage Output Voltage KVA Frequency (Hz) Taps Diagram No.
120 x 240 Volts 120/240 Volts 0.05 60 Hz No taps 1 9T51B0022
120 x 240 Volts 120/240 Volts 0.1 60 Hz No taps 1 9T51B0024
120 x 240 Volts 120/240 Volts 0.15 60 Hz No taps 1 9T51B0025
120 x 240 Volts 120/240 Volts 0.25 60 Hz No taps 1 9T51B0027
120 x 240 Volts 120/240 Volts 0.5 60 Hz No taps 1 9T51B0028
120 x 240 Volts 120/240 Volts 0.75 60 Hz No taps 1 9T51B0029
120 x 240 Volts 120/240 Volts 1 60 Hz No taps 1 9T51B0030
120 x 240 Volts 120/240 Volts 1.5 60 Hz No taps 1 9T51B0031
120 x 240 Volts 120/240 Volts 2 60 Hz No taps 1 9T51B0032
120 x 240 Volts 120/240 Volts 3 60 Hz No taps 1 9T51B0033
208 Volts 120/240 Volts 0.5 60 Hz No taps 4 9T51B0158
208 Volts 120/240 Volts 0.75 60 Hz No taps 4 9T51B0159
208 Volts 120/240 Volts 1 60 Hz No taps 4 9T51B0160
208 Volts 120/240 Volts 2 60 Hz No taps 4 9T51B0156
208 Volts 120/240 Volts 3 60 Hz No taps 4 9T51B0157
5 - 25 kVA Indoor/Outdoor Type QMS 115°C Rise UL Listed C-UL Listed
Input Voltage Output Voltage KVA Frequency (Hz) Taps Diagram No.
120 x 240 Volts 120/240 Volts 5 60 Hz No taps 1 9T21B1001G02
120 x 240 Volts 120/240 Volts 7.5 60 Hz No taps 1 9T21B1002G02
120 x 240 Volts 120/240 Volts 10 60 Hz No taps 1 9T21B1003G02
120 x 240 Volts 120/240 Volts 15 60 Hz No taps 1 9T21B9101
120 x 240 Volts 120/240 Volts 25 60 Hz No taps 1 9T21B9102
208 Volts 120/240 Volts 5 60 Hz No taps 4 9T21B1028G02
208 Volts 120/240 Volts 7.5 60 Hz No taps 4 9T21B1029G02
208 Volts 120/240 Volts 10 60 Hz No taps 4 9T21B1030G02
208 Volts 120/240 Volts 15 60 Hz No taps 4 9T21B9119
208 Volts 120/240 Volts 25 60 Hz No taps 4 9T21B9120
1
Wiring Product
1
Number
Number
.050 - 3 kVA Indoor/Outdoor Type QB UL Listed C-UL Listed
Wiring Product
Input Voltage Output Voltage KVA Frequency (Hz) Taps Diagram No.
277 Volts 120/240 Volts 0.25 60 Hz (2) 5% taps below rated primary volts 2 9T51B0187
277 Volts 120/240 Volts 0.5 60 Hz (2) 5% taps below rated primary volts 2 9T51B0188
277 Volts 120/240 Volts 0.75 60 Hz (2) 5% taps below rated primary volts 2 9T51B0189
277 Volts 120/240 Volts 1 60 Hz (2) 5% taps below rated primary volts 2 9T51B0190
277 Volts 120/240 Volts 1.5 60 Hz (2) 5% taps below rated primary volts 2 9T51B0191
277 Volts 120/240 Volts 2 60 Hz (2) 5% taps below rated primary volts 2 9T51B0192
277 Volts 120/240 Volts 3 60 Hz (2) 5% taps below rated primary volts 2 9T51B0193
380/400/416 Volts 120/240 Volts 0.05 50/60 Hz No taps 2 9T51B0162
380/400/416 Volts 120/240 Volts 0.15 50/60 Hz No taps 2 9T51B0165
380/400/416 Volts 120/240 Volts 0.25 50/60 Hz No taps 2 9T51B0167
380/400/416 Volts 120/240 Volts 0.5 50/60 Hz No taps 2 9T51B0168
380/400/416 Volts 120/240 Volts 0.75 50/60 Hz No taps 2 9T51B0169
380/400/416 Volts 120/240 Volts 1 50/60 Hz No taps 2 9T51B0170
380/400/416 Volts 120/240 Volts 1.5 50/60 Hz No taps 2 9T51B0171
380/400/416 Volts 120/240 Volts 2 50/60 Hz No taps 2 9T51B0172
380/400/416 Volts 120/240 Volts 3 50/60 Hz No taps 2 9T51B0173
1
Number GO-90A
5 - 25 kVA Indoor/Outdoor Type QMS 115°C Rise UL Listed C-UL Listed
Wiring Product
Input Voltage Output Voltage KVA Frequency (Hz) Taps Diagram No.
277 Volts 120/240 Volts 5 60 Hz (2) 5% taps below rated primary volts 2 9T21B1046G02
277 Volts 120/240 Volts 7.5 60 Hz (2) 5% taps below rated primary volts 2 9T21B1047G02
277 Volts 120/240 Volts 10 60 Hz (2) 5% taps below rated primary volts 2 9T21B1048G02
277 Volts 120/240 Volts 15 60 Hz (2) 5% taps below rated primary volts 2 9T21B9143
277 Volts 120/240 Volts 25 60 Hz (2) 5% taps below rated primary volts 2 9T21B9144
1
See page 14-14 for wiring diagrams.
1
Number GO-90C
Control Catalog
14-11
Page 4
Transformers
Section 14
General Purpose Transformers in Enclosures
Type QB
Isolated
CE-Rated
CE Comp liant Tr ansfo rmer
Safety Isolation 50/60 Hz
Input Voltage Output Voltage KVA Frame Size Depth (in) Width (in) Height (in) Number
230/400 Volts 12/24 Volts 0.075 8 4.25 6.12 7.38 9T51E0023
230/400 Volts 12/24 Volts 0.15 8 4.25 6.12 7.38 9T51E0025
230/400 Volts 12/24 Volts 0.25 10 4.88 6.88 8.35 9T51E0027
Product
Isolation 50/60 Hz
Input Voltage Output Voltage KVA Frame Size Depth (in) Width (in) Height (in) Number
230/400 Volts 24/48 Volts 0.2 10 4.88 6.88 8.35 9T51E0066
230/400 Volts 24/48 Volts 0.3 10 4.88 6.88 8.35 9T51E0068
230/400 Volts 24/48 Volts 0.75 14 6.72 9.38 11.12 9T51E0073
Product
Isolation (Triple-Rated) 50/60 Hz
Input Voltage Output Voltage KVA Frame Size Depth (in) Width (in) Height (in) Number
220/380, 230/400, 110/220, 115/230, 0.1 8 4.25 6.12 7.38 9T51E0154
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.15 8 4.25 6.12 7.38 9T51E0155
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.2 10 4.88 6.88 8.35 9T51E0156
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.25 10 4.88 6.88 8.35 9T51E0157
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.3 10 4.88 6.88 8.35 9T51E0158
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.375 12 5.5 7.88 9.62 9T51E0159
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.5 12 5.5 7.88 9.62 9T51E0161
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.1 14 6.72 9.38 11.12 9T51E0164
240/415 Volts 120/240 Volts
220/380, 230/400, 110/220, 115/230, 0.15 14 6.72 9.38 11.12 9T51E0165
240/415 Volts 120/240 Volts
For additional voltage requirements and available QMS single-phase designs, contact your GE Sales Office or GE authorized distributor.
Product
14-12
Control Catalog
Page 5
Transformers
General Purpose Transformers in Enclosures
Dry-Type/Cased
Dimensions and Weights
Section 14
Type QB Single-Phase 60, 50/60 Hz
KVA Height (in) Width (in) Depth (in) Weight (lbs.)
0.05 6.38 5.13 3.25 6
0.075 6.38 5.13 3.25 6
0.1 6.38 5.13 3.25 6
0.15 7.38 6.13 4.25 10
0.25 7.38 6.13 4.25 10
0.5 8.38 6.88 4.88 16
0.75 9.63 7.88 5.5 25
1 9.63 7.88 5.5 25
1.5 11.13 9.38 6.72 40
2 11.13 9.38 6.72 40
3 11.13 9.38 6.72 60
Approx. Net
Type QMS Single-Phase 60 Hz 115°C Rise
KVA Height (in) Width (in) Depth (in) Weight (lbs.)
5 14.5 10.75 11.16 100
7.5 17.12 10.75 11.16 180
10 17.10 12.16 12.72 180
15 17.10 12.16 12.72 230
25 19.84 16.01 15.68 400
Approx. Net
Type QMS Single-Phase 50/60 Hz 115°C Rise
KVA Height (in) Width (in) Depth (in) Weight (lbs.)
5 14.5 10.75 11.16 115
7.5 17.12 10.75 11.16 174
10 17.10 12.16 12.72 230
15 17.10 12.16 12.72 265
25 19.84 16.01 15.68 440
Approx. Net
Conversion Chart
Decimal Fraction
.13 1/8
.38 3/8
.63 5/8
.88 7/8
Control Catalog
14-13
Page 6
Transformers
General Purpose Transformers in Enclosures
Dry-Type/Cased
Wiring Diagrams
Section 14
Diag ram 1
Diag ram 2
Diag ram 4
Diag ram 5
14-14
Diag ram 3
Control Catalog
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