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Low Temperature Rise Transformers
SolaHD low temperature rise transformers feature a 220°C insulation system and temperature rise of only 80°C or 115°C under full nameplate load. The result is 13-21% lower operating losses than conventional 150°C rise units. Reduction in temperature rise increases reliability.
The 35°C thermal reserve on 115°C rise units and 70°C
reserve on 80°C rise units definitely mean higher reliability.
The extra benefit is being able to operate either of these
transformers as a 150°C rise unit and have a short term
overload capacity of 15-30% without compromising normal life expectancy (See Figure 1).
Low temperature rise transformers are designed for any critical application requiring extra overload capability,
lower than average total losses and/or cooler operating
temperatures. All are available with either a 115°C or 80°C thermal rise and a Class 220°C insulation system.
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On this page: Accessories and Optional Design Styles, Selection Tables for 80°C Rise, Selection Tables for 115°C Rise
A printable version of the following section is available by selecting the pdf files to the left. |
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| Accessories and Optional Design Styles* |
 |
- Wall mounting brackets (500 lbs maximum) (Item WB1C)
- Weather Shields (UL-3R)*
- Stainless Steel Enclosures
- Totally enclosed non-ventilated designs (TENV) (Non UL)
- Open core and coil designs (UL Recognized)
- Copper Wound designs
- Compliant to NEMA TP-1 standards
*Not all optional designs are UL listed. Contact Technical Services.
| Group
1: 240 x 480 Volt Primary, 120/240 Secondary, 60
Hz, 80oC rise |
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|
UL File: |
kVA |
Catalog Number
80oC Rise |
NEMA 3R
Weather Shield* |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style** |
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ES5HB15S |
WS-15 |
28 |
16 |
16 |
265 |
1 |
1 |
62.5/31.3 |
125/62.5 |
| 25 |
ES5HB25S |
WS-17 |
31 |
18 |
18 |
340 |
1 |
1 |
104/52.1 |
208/104 |
| 37.5 |
ES5HB37S |
WS-17 |
31 |
18 |
18 |
425 |
1 |
1 |
156/78 |
313/156 |
| 50 |
ES5HB50S |
WS-09 |
44 |
23 |
21 |
655 |
1 |
1 |
208/104 |
416/208 |
| 75 |
S5HB75S |
WS-09 |
44 |
23 |
21 |
750 |
1 |
1 |
313/156 |
625/313 |
| 100 |
ES5HB100S |
WS-16 |
46 |
26 |
24 |
980 |
1 |
1 |
417/208 |
833/417 |
*Weather shields come in a set of
two and need to be ordered separately.
**Design Style and Electrical Connections can be found by clicking the link or by selecting the pdf files to the left. |
| Group
2: 600 Volt Primary, 120/240 Secondary, 60 Hz, 80oC Rise |
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|
kVA |
Catalog Number
80oC Rise |
NEMA 3R
Weather Shield |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style** |
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ES10HB15S |
WS-15 |
28 |
16 |
16 |
265 |
1 |
4 |
25.0 |
125/62.5 |
| 25 |
ES10HB25S |
WS-17 |
31 |
18 |
18 |
340 |
1 |
4 |
41.7 |
208/104 |
| 37.5 |
ES10HB37S |
WS-17 |
31 |
18 |
18 |
425 |
1 |
4 |
62.5 |
313/156 |
| 50 |
ES10HB50S |
WS-09 |
44 |
23 |
21 |
655 |
1 |
4 |
83.3 |
416/208 |
| 75 |
ES10HB75S |
WS-09 |
44 |
23 |
21 |
750 |
1 |
4 |
125 |
625/313 |
| 100 |
ES10HB100S |
WS-16 |
46 |
26 |
24 |
980 |
1 |
4 |
167 |
833/417 |
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*Weather shields come in a set of two and need to be ordered separately.
**Design Style and Electrical Connections can be found by clicking the link or by selecting the pdf file to the left. |
| Three Phase Selection Table (80oC Rise) |
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| Group
A: 480 D
Primary, 208Y/120 Secondary, 60 Hz, 80oC Rise
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UL File:
|
kVA |
Catalog Number
80oC Rise |
NEMA 3R
Weather Shield* |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style**
|
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ET2HB15S |
WS-14 |
28 |
23 |
16 |
292 |
1 |
5 |
18.1 |
41.7 |
| 30 |
ET2HB30S |
WS-14 |
28 |
23 |
18 |
376 |
1 |
5 |
36.1 |
83.4 |
| 45 |
ET2HB45S |
WS-30 |
34 |
28 |
22 |
569 |
1 |
5 |
54.2 |
125 |
| 75 |
ET2HB75S |
WS-30 |
34 |
28 |
22 |
768 |
1 |
5 |
90.3 |
208 |
| 112.5 |
ET2HB112S |
WS-10 |
44 |
33 |
21 |
933 |
1 |
5 |
135 |
313 |
| 150 |
ET2HB150S |
WS-11 |
46 |
36 |
24 |
1342 |
1 |
5 |
181 |
417 |
| 225 |
ET2HB225S |
WS-11 |
46 |
36 |
24 |
1525 |
1 |
5 |
271 |
625 |
| 300 |
ET2HB300S |
WS-12 |
65 |
45 |
35 |
2460 |
1 |
5 |
361 |
834 |
*Weather shields come in a set of two and need to be ordered separately.
**Design Style and Electrical Connections can be found by clicking the links above. |
| Group
B: 480 D
Primary, 240 D Secondary with reduced capacity Center Tap, 80oC Rise
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|
UL File:
|
kVA |
Catalog Number
80oC Rise |
NEMA 3R
Weather Shield* |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style**
|
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ET5HB15S |
WS-14 |
28 |
23 |
16 |
292 |
1 |
7 |
18.1 |
36.1 |
| 30 |
ET5HB30S |
WS-14 |
28 |
23 |
18 |
381 |
1 |
7 |
36.1 |
72.3 |
| 45 |
ET5HB45S |
WS-30 |
34 |
28 |
22 |
580 |
1 |
7 |
54.2 |
108 |
| 75 |
ET5HB75S |
WS-30 |
34 |
28 |
22 |
760 |
1 |
7 |
90.3 |
181 |
| 112.5 |
ET5HB112S |
WS-10 |
44 |
33 |
21 |
940 |
1 |
7 |
135 |
271 |
| 150 |
ET5HB150S |
WS-11 |
46 |
36 |
24 |
1342 |
1 |
7 |
181 |
361 |
| 225 |
ET5HB225S |
WS-11 |
46 |
36 |
24 |
1525 |
1 |
7 |
271 |
542 |
| 300 |
ET5HB300S |
WS-12 |
65 |
45 |
35 |
2460 |
1 |
7 |
361 |
723 |
*Weather shields come in a set of two and need to be ordered separately.
**Design Style and Electrical Connections can be found by clicking the links above. |
| Group 1: 240 x 480 Volt Primary, 120/240 Secondary, 60 Hz, 115oC Rise |
|
|
kVA |
Catalog Number
115oC Rise |
NEMA 3R
Weather Shield* |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style** |
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ES5HF15S |
WS-15 |
28 |
16 |
16 |
175 |
1 |
1 |
62.5/31.3 |
125/62.5 |
| 25 |
ES5HF25S |
WS-17 |
28 |
16 |
16 |
265 |
1 |
1 |
104/52.1 |
208/104 |
| 37.5 |
ES5HF37S |
WS-17 |
31 |
18 |
18 |
340 |
1 |
1 |
156/78 |
313/156 |
| 50 |
ES5HF50S |
WS-09 |
31 |
18 |
18 |
425 |
1 |
1 |
208/104 |
416/208 |
| 75 |
ES5HF75S |
WS-09 |
44 |
23 |
21 |
655 |
1 |
1 |
313/156 |
625/313 |
| 100 |
ES5HF100S |
WS-09 |
44 |
23 |
21 |
750 |
1 |
1 |
417/208 |
833/417 |
*Weather shields come in a set of two and need to be ordered separately.
**Design Style and Electrical Connections can be found by clicking the links above. |
| Group 2: 600 Volt Primary, 120/240 Secondary, 60 Hz, 115oC Rise |
|
UL File: |
|
kVA |
Catalog Number
115oC Rise |
NEMA 3R
Weather Shield* |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style** |
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ES10HF15S |
WS-15 |
23 |
16 |
16 |
175 |
1 |
4 |
25 |
125/62.5 |
| 25 |
ES10HF25S |
WS-15 |
28 |
16 |
16 |
265 |
1 |
4 |
41.7 |
208/104 |
| 37.5 |
ES10HF37S |
WS-17 |
31 |
18 |
18 |
340 |
1 |
4 |
62.5 |
313/156 |
| 50 |
ES10HF50S |
WS-17 |
31 |
18 |
18 |
425 |
1 |
4 |
83.3 |
416/208 |
| 75 |
ES10HF75S |
WS-09 |
44 |
23 |
21 |
655 |
1 |
4 |
125 |
625/313 |
| 100 |
ES10HF100S |
WS-09 |
44 |
23 |
21 |
750 |
1 |
4 |
167 |
833/417 |
*Weather shields come in a set of two and need to be ordered separately.
**Design Style and Electrical Connections can be found by clicking the link or by selecting the pdf files to the left. |
| Three Phase Selection Table (115oC Rise) |
|
| Group A: 480 D Primary, 208Y/120 Secondary, 60 Hz, 115oC Rise |
|
UL File: |
kVA |
Catalog Number
115oC Rise |
NEMA 3R
Weather Shield* |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style** |
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ET2HF15S |
WS-02 |
23 |
18 |
14 |
187 |
1 |
5 |
18.1 |
41.7 |
| 30 |
ET2HF30S |
WS-14 |
28 |
23 |
18 |
292 |
1 |
5 |
36.1 |
83.4 |
| 45 |
ET2HF45S |
WS-14 |
28 |
23 |
16 |
378 |
1 |
5 |
54.2 |
125 |
| 75 |
ET2HF75S |
WS-30 |
34 |
28 |
22 |
569 |
1 |
5 |
90.3 |
208 |
| 112.5 |
ET2HF112S |
WS-30 |
34 |
28 |
22 |
768 |
1 |
5 |
135 |
313 |
| 150 |
ET2HF150S |
WS-10 |
44 |
33 |
21 |
933 |
1 |
5 |
181 |
417 |
| 225 |
ET2HF225S |
WS-11 |
46 |
36 |
24 |
1342 |
1 |
5 |
271 |
625 |
| 300 |
ET2HF300S |
WS-11 |
46 |
36 |
24 |
1525 |
1 |
5 |
361 |
834 |
*Weather shields come in a set of two and need to be ordered separately.
**Design Style and Electrical Connections can be found by clicking the link or by selecting the pdf files to the left. |
| Group B: 480 D Primary, 240 Volt D Secondary with reduced capacity Center Tap, 60 Hz, 115oC Rise |
|
UL File: |
kVA |
Catalog Number
115oC Rise |
NEMA 3R
Weather Shield* |
Height
(inch) |
Width
(inch) |
Depth
(inch) |
Ship Weight
Approx. (lbs) |
Design
Style** |
Elec
Conn |
Prim.
Amps |
Sec.
Amps |
| 15 |
ET2HF15S |
WS-02 |
23 |
19 |
14 |
189 |
1 |
6 |
18.1 |
36.1 |
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