5
Ventilated Distribution Transformers
Contact Technical Services at (800) 377-4384 with any questions.
Visit our website at www.solahd.com.
201
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary Amps
@ 277 V
Secondary
Amps
15 ES12H15S WS-15 28.00 (711.2) 16.00 (406.4) 16.00 (406.4) 215.0 (97.52) 1 2 54.2 125/62.5
25 ES12H25S WS-15 28.00 (711.2) 16.00 (406.4) 16.00 (406.4) 250.0 (113.40) 1 2 90.3 208/104
Energy efcient dry-type transformers 600 Volt Class,
isolation type, single and three phase, 15 kVA through
500 kVA. Indoor and outdoor models available.
Accessories and Optional Design Styles
• Electrostatic shield for quality power
• Wall mounting brackets (500 lbs maximum) (Item WB1C)
• Weather Shields (UL Listed/NEMA Type 3R)
• Stainless Steel Enclosures
• Totally enclosed non-ventilated designs (TENV) (Non UL) *
• Open core and coil designs (UL Recognized)
• Copper Wound designs
• Low temperature designs
Features
• UL Listed/NEMA Type 3R ventilated outdoor enclosures
when used with optional weather shields
(order separately)
• UL Class 220°C insulation system, 150°C
temperature rise under full load
• Terminal board connections and spacious wiring
compartment
• Panel enclosure design reduces labor time. Wiring
diagram on inside front cover.
• High efciency for low cost operation
• Compliant to NEMA TP-1 Standards
• Single and three phase availability
• Fast delivery
• 10 year limited warranty
Certifications and Compliances
• Listed
- UL 1561
Selection Tables: Single Phase
Group 1: 240 x 480 Volt Primary, 120/240 Secondary, 60 Hz
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ES5H15S WS-15 28.00 (711.2) 16.00 (406.4) 16.00 (406.4) 210.0 (95.25) 1 1 62.5/31.3 125/62.5
25 ES5H25S WS-15 28.00 (711.2) 16.00 (406.4) 16.00 (406.4) 245.0 (111.13) 1 1 104/52.1 208/104
37.5 ES5H37S WS-17 31.00 (787.4) 18.00 (457.2) 18.00 (457.2) 340.0 (154.22) 1 1 156/78 313/156
50 ES5H50S WS-17 31.00 (787.4) 18.00 (457.2) 18.00 (457.2) 415.0 (188.24) 1 1 208/104 416/208
75 ES5H75S WS-09 44.00 (1117.6) 23.00 (584.2) 21.00 (533.4) 610.0 (276.69) 1 1 313/156 625/313
100 ES5H100S WS-09 44.00 (1117.6) 23.00 (584.2) 21.00 (533.4) 705.0 (319.78) 1 1 417/208 833/417
167 ES5H167S WS-16 46.00 (1168.4) 26.00 (660.4) 24.00 (609.6) 980.0 (444.52) 1 1 695/348 1392/695
Notes:
1. Weather shields (set of two) must be ordered separately.
2. Design Styles and Electrical Connections can be found at the end of the Ventilated Distribution Transformers section.
Group 2 – 120/208/240/277 Volt Primary, 120/240 Secondary, 60 Hz
General Purpose
* Not all optional designs are listed. Contact Technical Services.
E25872
5Ventilated Distribution Transformers
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Visit our website at www.solahd.com.
202
Group A: 480 Volt Δ Primary, 208/120 Secondary, 60 Hz
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET2H15 3
WS-02 23.00(584.2) 18.00 (457.2) 14.00 (355.6) 187.0 (84.82) 1 5 18.1 41.7
ET2H15S
30 ET2H30 3
WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 292.0 (132.45) 1 5 36.1 83.4
ET2H30S
45 ET2H45 3
WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 376.0 (170.55) 1 5 54.2 125.0
ET2H45S
75 ET2H75 3
WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 569.0 (258.09) 1 5 90.3 208.0
ET2H75S
112.5 ET2H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 768.0 (348.36) 1 5 135.0 313.0
150 ET2H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 933.0 (423.20) 1 5 181.0 417.0
225 ET2H225S WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1342.0 (608.72) 1 5 271.0 625.0
300 ET2H300S WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1525.0 (691.73) 1 5 361.0 834.0
500 ET2H500S WS-12 65.00 (1651.0) 45.00 (1143.0) 35.00 (889.0) 2460.0 (1115.84) 1 5 602.0 1390.0
Selection Tables: Three Phase
Group B: 480 Volt Δ Primary, 240 Volt Δ, Secondary with reduced capacity center tap 4, 60 Hz
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET5H15 3
WS-02 23.00 (584.2) 19.00 (482.6) 14.00 (355.6) 189.0 (85.73) 1 6 18.1 36.1
ET5H15S
30 ET5H30 3
WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 292.0 (132.45) 1 6 36.1 72.3
ET5H30S
45 ET5H45 3
WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 381.0 (172.82) 1 6 54.2 108.0
ET5H45S
75 ET5H75 3
WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 560.0 (254.01) 1 6 90.3 181.0
ET5H75S
112.5 ET5H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 760.0 (344.73) 1 6 135.0 271.0
150 ET5H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 940.0 (426.38) 1 6 181.0 361.0
225 ET5H225S WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1342.0 (608.72) 1 6 271.0 542.0
300 ET5H300S WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1525.0 (691.73) 1 6 361.0 723.0
500 ET5H500S WS-12 65.00 (1651.0) 45.00 (1143.0) 35.00 (889.0) 2460.0 (1115.84) 1 6 602.0 1204.0
Notes:
1. Weather shields (set of two) must be ordered separately.
2. Design Styles and Electrical Connections can be found at the end of the Ventilated Distribution Transformers section.
3. Unshielded model.
4. Refer to Capacity of Center Tap in Center Tap Delta Transformers at the beginning of this section.
5
Ventilated Distribution Transformers
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203
Selection Tables: Three Phase
Notes:
1. Weather shields (set of two) must be ordered separately.
2. Design Styles and Electrical Connections can be found at the end of the Ventilated Distribution Transformers section.
Group C: 480 Volt Δ Primary, 480Y/277 Secondary, 60 Hz
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET81H15S WS-02 23.00 (584.2) 18.00 (457.2) 14.00 (355.6) 189.0 (85.73) 1 8 18.1 18.1
30 ET81H30S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 295.0 (133.81) 1 8 36.1 36.1
45 ET81H45S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 380.0 (172.37) 1 8 54.2 54.2
75 ET81H75S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 560.0 (254.01) 1 8 90.3 90.3
112.5 ET81H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 780.0 (353.80) 1 8 135.0 135.0
150 ET81H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 933.0 (423.20) 1 8 181.0 181.0
225 ET81H225S WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1342.0 (608.72) 1 8 271.0 271.0
300 ET81H300S WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1525.0 (691.73) 1 8 361.0 361.0
500 ET81H500S WS-12 65.00 (1651.0) 45.00 (1143.0) 35.00 (889.0) 2460.0 (1115.84) 1 8 602.0 602.0
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET84H15S WS-02 23.00 (584.2) 18.00 (457.2) 14.00 (355.6) 195.0 (88.45) 1 10 41.7 18.1
30 ET84H30S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 295.0 (133.81) 1 10 83.4 36.1
45 ET84H45S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 375.0 (170.09) 1 10 125.0 54.2
75 ET84H75S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 570.0 (258.55) 1 10 208.0 90.3
112.5 ET84H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 780.0 (353.80) 1 10 313.0 135.0
150 ET84H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 972.0 (440.89) 1 10 417.0 181.0
Group D: 208 Volt Δ Primary, 480Y/277 Secondary, 60 Hz
5Ventilated Distribution Transformers
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204
Selection Tables: Three Phase
Group G: 240 Volt Δ Primary, 480Y/277 Secondary, 60 Hz
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET85H15S WS-02 23.00 (584.2) 18.00 (457.2) 14.00 (355.6) 190.0 (86.18) 1 12 36.1 18.1
30 ET85H30S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 295.0 (133.81) 1 12 72.3 36.1
45 ET85H45S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 380.0 (172.37) 1 12 108.0 54.2
75 ET85H75S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 560.0 (254.01) 1 12 181.0 90.3
112.5 ET85H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 805.0 (365.14) 1 12 271.0 135.0
150 ET85H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 972.0 (440.89) 1 12 361.0 181.0
Group E: 208 Volt Δ Primary, 208Y/120 Secondary, 60 Hz
Group F: 240 Volt Δ Primary, 208Y/120 Secondary, 60 Hz
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET6H15S WS-02 23.00 (584.2) 18.00 (457.2) 14.00 (355.6) 190.0 (86.18) 1 11 36.1 41.7
30 ET6H30S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 295.0 (133.81) 1 11 72.3 83.4
45 ET6H45S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 380.0 (172.37) 1 11 108.0 125.0
75 ET6H75S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 570.0 (258.55) 1 11 181.0 208.0
112.5 ET6H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 805.0 (365.14) 1 11 271.0 313.0
150 ET6H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 972.0 (440.89) 1 11 361.0 417.0
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET3H15S WS-02 23.00 (584.2) 18.00 (457.2) 14.00 (355.6) 190.0 (86.18) 1 9 41.7 41.7
30 ET3H30S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 295.0 (133.81) 1 9 83.4 83.4
45 ET3H45S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 380.0 (172.37) 1 9 125.0 125.0
75 ET3H75S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 570.0 (258.55) 1 9 208.0 208.0
112.5 ET3H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 805.0 (365.14) 1 9 313.0 313.0
150 ET3H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 972.0 (440.89) 1 9 416.0 416.0
Notes:
1. Weather shields (set of two) must be ordered separately.
2. Design Styles and Electrical Connections can be found at the end of the Ventilated Distribution Transformers section.
5
Ventilated Distribution Transformers
Contact Technical Services at (800) 377-4384 with any questions.
Visit our website at www.solahd.com.
205
Group K: 480 Volt Δ Primary, 208Y/120 Secondary, 60 Hz, Copper-Wound
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET2H15SCU WS-02 23.00 (584.2) 18.00 (457.2) 14.00 (355.6) 205.0 (92.98) 1 5 18.1 41.7
30 ET2H30SCU WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 305.0 (138.35) 1 5 36.1 83.4
45 ET2H45SCU WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 405.0 (183.70) 1 5 54.2 125.0
75 ET2H75SCU WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 535.0 (242.67) 1 5 90.3 208.0
112.5 ET2H112SCU WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 805.0 (365.14) 1 5 135.0 313.0
150 ET2H150SCU WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 972.0 (440.89) 1 5 181.0 417.0
225 ET2H225SCU WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1325.0 (601.01) 1 5 271.0 625.0
300 ET2H300SCU WS-11 46.00 (1168.4) 36.00 (914.4) 24.00 (609.6) 1515.0 (687.19) 1 5 361.0 834.0
500 ET2H500SCU WS-12 65.00 (1651.0) 45.00 (1143.0) 35.00 (889.0) 2460.0 (1115.84) 1 5 602.0 1390.0
kVA Catalog
Number
Type 3R
Weather Shield 1
Height
in (mm)
Width
in (mm)
Depth
in (mm)
Approx. Ship
Weight lbs (kg)
Design
Style 2
Elec
Conn 2
Primary
Amps
Secondary
Amps
15 ET79H15S WS-02 23.00 (584.2) 18.00 (457.2) 14.00 (355.6) 190.0 (86.18) 1 7 18.1 22.8
30 ET79H30S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 295.0 (133.81) 1 7 36.1 45.6
45 ET79H45S WS-14 28.00 (711.2) 23.00 (584.2) 16.00 (406.4) 380.0 (172.37) 1 7 54.2 68.4
75 ET79H75S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 360.0 (163.29) 1 7 90.3 114.0
112.5 ET79H112S WS-30 34.00 (863.6) 28.00 (711.2) 22.00 (558.8) 770.0 (349.27) 1 7 135.3 170.9
150 ET79H150S WS-10 44.00 (1117.6) 33.00 (838.2) 21.00 (533.4) 933.0 (423.20) 1 7 180.4 227.9
Group J: 480 Volt Δ Primary, 380Y/220 Secondary, 60 Hz
Selection Tables: Three Phase
Notes:
1. Weather shields (set of two) must be ordered separately.
2. Design Styles and Electrical Connections can be found at the end of the Ventilated Distribution Transformers section.
5
Ventilated Distribution Transformers
Contact Technical Services at (800) 377-4384 with any questions.
Visit our website at www.solahd.com.
211
Design Style
Style 1 - Ventilated
W D
H
120/208/240/277 Volt Primary,
120/240 Volt Secondary
Taps: None
Primary Voltage Interconnect Connect
Lines To
277 1 to 2 H1 & H2
240 3 to 4 H1 & H2
208 5 to 6 H1 & H2
120 H1 to 4
H2 to 3 H1 & H2
Secondary
Voltage Interconnect Connect
Lines To
240 X2 to X3 X1 & X4
120-0-120 X2 to X3
X2 to X1-X2-X4
120 X1 to X3
X2 to X4 X1 & X4
ES12 Series
240 x 480 Volt Primary,
120/240 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary Voltage Interconnect Connect
Lines To
504 1 to 2 H1 & H2
492 2 to 3 H1 & H2
480 3 to 4 H1 & H2
468 4 to 5 H1 & H2
456 5 to 6 H1 & H2
444 6 to 7 H1 & H2
432 7 to 8 H1 & H2
252 H1 to 2 H2 to 1 H1 & H2
240 H1 to 4 H2 to 3 H1 & H2
228 H1 to 6 H2 to 5 H1 & H2
216 H1 to 8 H2 to 7 H1 & H2
Secondary
Voltage Interconnect Connect
Lines To
240 X2 to X3 X1 & X4
120-0-120 X2 to X3 X2 to X1-X2-X4
120 X1 to X3 X2 to X4 X1 & X4
ES5 Series
12
7
H1 H2
SHIELD
531 2 4 68
X1 X3 X2 X4
H1 H2
3
51 2 4 6
SHIELD
X1 X3 X2 X4
480 Δ Volt Primary,
240 Δ W/120 CT Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary H1-H2-H3 Secondary Voltage
@ Tap Voltage X1, X2, X3 X6-X1, X6-X3
1 504
240 120
2 492
3 480
4 468
5 456
6 444
7 432
ET5 Series
* Shield available in electrostatically shielded units only.
480 Δ Volt Primary,
208Y/120 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary H1-H2-H3 Secondary Voltage
@ Tap Voltage X1, X2, X3 X0- X1, X2, X3
1 504
208 120
2 492
3 480
4 468
5 456
6 444
7 432
ET2 and 3H Series
* Shield available in electrostatically shielded units only.
56
H1 H3
H2
X1
X6
X3
X2
H1 H2 H3
7654321 7654321 7654321
X6
SHIELD
X1 X3
X2 *
X1 X2 X3
7654321 7654321 7654321
X0
SHIELD
H1 H3
H2
H1 H3
H2
X1
X2
X3
X0
*
5Ventilated Distribution Transformers
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212
Electrical Connections (Single Phase)
Electrical Connections (Three Phase)
208 Δ Volt Primary
208Y/120 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary H1-H2-H3 Secondary Voltage
@ Tap Voltage X1, X2, X3 X0- X1, X2, X3
1 218
208 120
2 213
3 208
4 203
5 198
6 192
7 187
ET3 Series
208 Δ Volt Primary
480Y/277 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary X1-X2-X3 Secondary Voltage
@ Tap Voltage H1-H2-H3 H0-H1, H2, H3
1 218
480 277
2 213
3 208
4 203
5 198
6 192
7 187
ET84 Series
480 Δ Volt Primary
480Y/277 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary H1-H2-H3 Secondary Voltage
@ Tap Voltage X1, X2, X3 X0- X1, X2, X3
1 504
480 277
2 492
3 480
4 468
5 456
6 444
7 432
ET81 Series
8
480 Δ Volt Primary
380/220 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary H1-H2-H3 Secondary Voltage
@ Tap Voltage X1, X2, X3 X0- X1, X2, X3
1 504
380 220
2 492
3 480
4 468
5 456
6 444
7 432
ET79 Series
7
H1 H3
H2
X1
X2
X3
X0
X1 X2 X3
7654321 7654321 7654321
X0
SHIELD
H1 H3
H2
240 Δ Volt Primary
480Y/277 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary X1-X2-X3 Secondary Voltage
@ Tap Voltage H1, H2, H3 H0- H1, H2, H3
1 252
480 277
2 246
3 240
4 234
5 228
6 222
7 216
ET85 Series
240 Δ Volt Primary
208Y/120 Volt Secondary
Taps: 2, 2½% FCAN; 4, 2½% FCBN
Primary H1-H2-H3 Secondary Voltage
@ Tap Voltage X1, X2, X3 X0- X1, X2, X3
1 252
208 120
2 246
3 240
4 234
5 228
6 222
7 216
ET6 Series
5
Ventilated Distribution Transformers
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213
9
10
H1 H2 H3
7654321 7654321 7654321
H0
SHIELD
X1 X3
X2
X1 X3
X2
H1
H2
H3
H0
H1 H3
H2
X1
X2
X3
X0
X1 X2 X3
7654321 7654321 7654321
X0
SHIELD
H1 H3
H2
X1 X2 X3
7654321 7654321 7654321
X0
SHIELD
H1 H3
H2
H1 H3
H2
X1
X2
X3
X0
Electrical Connections (Three Phase) cont.
11
X1 X3
X2
H1
H2
H3
H0
H1 H2 H3
7654321 7654321 7654321
H0
SHIELD
X1 X3
X2
12
X1 X2 X3
7654321 7654321 7654321
X0
SHIELD
H1 H3
H2
H1 H3
H2
X1
X2
X3
X0