®
JEFFERSON
Medium Voltage Transformers
Single-Phase
3 to 167 KVA
Three-Phase
15 to 300 KVA
TYPICAL APPLICATIONS
■ Indoors or outdoors for:
•
•
•
•
•
•
Industrial and commercial
High rise apartments
Factories
Offices and schools
Hospitals
Mass transit facilities
For the name of your local
representative, or for technical
assistance, call
1-800-892-3755
®
Jefferson
Electric
Medium Voltage Transformers
features & benefits
■ Designed for lower weight and smaller size for easier handling and installation.
■ Quiet operation for more flexibility in choice of mounting locations.
■ Heavy-duty sheet metal enclosures for maximum durability in severe industrial applications.
■ NEMA Type 3R enclosures for indoor or outdoor applications.
■ Heat applied ASA-61 Gray Powder Coat Finish to resist corrosion in severe environments.
■ Large connection compartment for ease of wiring and installation.
■ Standard stub down terminations.
■ Taps provided on primary to compensate for voltage variations.
■ Cores made from high quality electrical steel for increased efficiency and lower operating costs.
■ Built in accordance with ANSI C57.12.
■ 220°C insulation system standard with 150°C temperature rise for longer, more reliable life.
Low temperature 115°C and 80°C rise units also available.
■ Meets or exceeds all applicable NEMA, ANSI and OSHA requirements.
■ Made in U.S.A.
80
®
Jefferson
Electric
1-800-892-3755
MEDIUM VOLTAGE
Medium voltage dry type transformers offer an economical alternative to liquid filled designs for
institutional, industrial and commercial applications. Designs are available for both indoor or outdoor
applications. If necessary, Jefferson Electric will customize any of the standard models shown
to meet your precise requirements.
Enclosures
Typical KVA/Voltage Ratios
• Encapsulated
• Single-Phase: 60 Hz - 150°C Rise
3-167 KVA
All 3 - 25 KVA
Any HV from 1.2 KV to 5 KV
• Ventilated Indoor/Outdoor NEMA 3R
Any LV from 120 V to 480 V
All 15 KVA - 300 KVA
Bolted (knockdown) construction for easy
field installation.
• Three-Phase: 60 Hz - 150°C Rise
15 - 300 KVA
Any HV from 1.2 KV to 5 KV
Any LV from 208 V to 480 V
Terminations
Standard Basic Impulse Levels (BIL)
• Standard stub down terminations through 300 KVA;
front wiring to common terminal insulating bar.
Wiring Compartment
Voltage
Class - KV
Full & Chopped Waves
Crest - KV
1.2
10
5.0
30 or 60
• Spacious area for large conductor, ease of bending
and termination.
• Adequate room provided for specified fan cooling or
future fan cooling provision with or without controls
upon request.
• Expanded metal bottom assures air cooling for
accommodation of UL required conductor sizes.
• Large permanent nameplate provided for ratings
identification.
Sound Reduction
• Designed for low flux density using grain-oriented
silicon steel.
• Core clamps properly torqued to assure
quiet operation.
• Designed to meet ANSI requirements for testing.
1-800-892-3755
®
Jefferson
Electric
81
SINGLE-PHASE MEDIUM VOLTAGE
Wall Mounting • Encapsulated • 2 Taps @ 5% (FCBN) • 115°C
KVA
Case
Size
3
5
PA
7.5
10
15
PB
25
Approx.
Ship Wt.
(lbs)
Catalog No. for
2400V Primary
120/240V Secondary
Catalog No. for
2400V Primary
240/480 Secondary
Catalog No. for
4160V Primary
120/240V Secondary
Catalog No. for
4160V Primary
240/480V Secondary
Fig.
Wiring
Diagram
225-0105-000
–
225-0107-000
–
11
81A
185
225-0115-000
–
225-0117-000
–
11
81A
105
225-0135-000
–
225-0137-000
–
11
81A
135
225-0155-000
225-0156-000
225-0157-000
225-0158-000
11
81A
165
225-0165-000
225-0166-000
225-0167-000
225-0168-000
11
81A
235
225-0185-000
225-0186-000
225-0187-000
225-0188-000
11
81A
345
Approx.
Ship Wt.
(lbs)
Cabinet Style • 60 Hz • 5 KV Class • 4 Taps @ 21/2% (FCABN) • 150°C
Catalog No. for
2400V Primary
120/240V Secondary
Catalog No. for
2400V Primary
240/480V Secondary
Catalog No. for
4160V Primary
120/240V Secondary
Catalog No. for
4160V Primary
240/480V Secondary
Fig.
Wiring
Diagram
225-0205-000
225-0206-000
225-0207-000
225-0208-000
12
78A
385
225-0225-000
225-0226-000
225-0227-000
225-0228-000
12
78A
480
75
225-0235-000
225-0236-000
225-0237-000
225-0238-000
12
78A
620
100
225-0245-000
225-0246-000
225-0247-000
225-0248-000
12
78A
760
225-0275-000
225-0276-000
225-0277-000
225-0278-000
12
78A
1220
KVA
Case
Size
37.5
50
SA
SB
167
All terminals are located on the bottom.
NOTE:
Housing dimensions subject to change without notice.
Contact factory where dimensions are critical.
Dimensions in Inches
Case
Size
A
B
C
PA
16.03
12.63
8.75
PB
21.19
16
10.75
SA
40.5
17.5
20
SB
51.88
26
30.88
Figure 11
Figure 12
Wiring Diagram 81A
Wiring Diagram 78A
82
®
Jefferson
Electric
1-800-892-3755
THREE-PHASE MEDIUM VOLTAGE
Cabinet Style • 60 Hz • 5 KV Class • 4 Taps @ 21/2% (FCABN) • 150°C
KVA
15
Case
Size
TA
2400
208Y/120
227-0161-000
2400
240
2400
480Y/277
2400
480
227-0162-000 227-0163-000
4160
208Y/120
4160
240
4160
480Y/277
4160
480
Wir. Dia.
Delta Wye
Fig. Sec. Sec.
227-0164-000 227-0165-000 227-0166-000 227-0167-000 227-0168-000
15
82B 82A
Approx.
Ship Wt.
(lbs)
325
30
227-0191-000
227-0192-000 227-0193-000
227-0194-000 227-0195-000 227-0196-000 227-0197-000
227-0198-000
15
82B 82A
400
45
227-0211-000
227-0212-000 227-0213-000
227-0214-000 227-0215-000 227-0216-000 227-0217-000 227-0218-000
15
82B 82A
480
227-0231-000
227-0232-000 227-0233-000 227-0234-000 227-0235-000 227-0236-000 227-0237-000 227-0238-000
15
82B 82A
800
227-0251-000
227-0252-000 227-0253-000 227-0254-000 227-0255-000 227-0256-000 227-0257-000 227-0258-000
15
82B 82A
900
75
TB
112.5
150
225
300
TC
TD
227-0261-000
227-0262-000 227-0263-000 227-0264-000 227-0265-000 227-0266-000 227-0267-000 227-0268-000
15
82B 82A
1525
227-0291-000
227-0292-000 227-0293-000 227-0294-000 227-0295-000 227-0296-000 227-0297-000 227-0298-000
15
82B 82A
1600
227-0311-000
227-0312-000 227-0313-000
15
82B 82A
2250
227-0314-000 227-0315-000
227-0316-000 227-0317-000
227-0318-000
All terminals are located on the bottom.
Contact factory for additional sizes.
Dimensions in Inches
Figure 15
Case
Size
A
B
C
TA
33.75
24.75
18.38
TB
41.5
29.13
24.5
TC
51.88
35.75
30.88
TD
60
48
34
NOTE: Housing dimensions subject to change without notice.
Contact factory where dimensions are critical.
1-800-892-3755
®
Jefferson
Electric
83
THREE-PHASE MEDIUM VOLTAGE
Wiring Diagram 82A
Wiring Diagram 82B
PRIMARY: 2400 or 4160 Volt Delta
SECONDARY: 480Y/277 or 208Y/120
TAPS: 2, 2.5% FCAN; 2, 2.5% FCBN
PRIMARY: 2400 or 4160 Volt Delta
SECONDARY: 480 or 240 Volt Delta
TAPS: 2, 2.5% FCAN; 2, 2.5% FCBN
PRIMARY
PRIMARY
SECONDARY
SECONDARY
Primary
Primary
% Taps
On Each Coil
Jumper Between Taps
Connect Primary
Lines To
% Taps
On Each Coil
Jumper Between Taps
Connect Primary
Lines To
+5.0
1 and 2
H1, H2, H3
+5.0
1 and 2
H1, H2, H3
H1, H2, H3
+2.5
2 and 3
H1, H2, H3
+2.5
2 and 3
Nom.
3 and 4
H1, H2, H3
Nom.
3 and 4
H1, H2, H3
-2.5
4 and 5
H1, H2, H3
-2.5
4 and 5
H1, H2, H3
-5.0
5 and 6
H1, H2, H3
-5.0
5 and 6
H1, H2, H3
Secondary
Secondary
Connect Secondary
Lines To
Volts
Connect Secondary
Lines To
480 or 208
X1, X2, X3
480 or 240
X1, X2, X3
277 or 120
1 Phase
Between X0 and
X1 or X2 or X3
Volts
84
®
Jefferson
Electric
1-800-892-3755