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hubbell-acmeelectric.comEconomical Auto Arrangements
D r y - T y p e D i s t r i b u t i o n T r a n s f o r m e r s
600 PRIMARY VOLTS — 480 SECONDARY VOLTS — 3Ø, 60 Hz
480 PRIMARY VOLTS — 380 SECONDARY VOLTS — 3Ø, 50/60 Hz AUTO TRANSFORMERS
kVA
①
Primary 600V
Secondary
480V
Primary 480V
Secondary
380V
Catalog
Number
Height
(Inches)(Cm.)
Width
(Inches)(Cm.
Depth
(Inches)(Cm.
Weight
(Lbs.)(Kg.)
Mounting
Type
(Wall)(Floor)
Knockouts
(Inches)(Cm.
Weather
Shield
Wiring
Diagrams
Design
Figures
15.0
12.0
T2527031
}
15.21 (38.6)
19.25 (48.9)
7.37 (18.7)
104 (47.2)
W
NA
NA
56
F
30.0
24.0
T2527051
}
15.21 (38.6)
19.25 (48.9)
7.37 (18.7)
152 (68.9)
W
NA
NA
56
F
45.0
36.0
T2527071
}
15.21 (38.6)
19.25 (48.9)
7.37 (18.7)
156 (70.8)
W
NA
NA
56
F
75.0
60.0
T3527101
}
18.86 (47.9)
20.30 (51.6)
9.03 (22.9)
300 (136.1)
F
NA
NA
56
I
112.5
90.0
T2A527121
~
25.50 (64.8)
24.40 (62.0)
19.40 (49.3)
325 (147.0)
F
①
NA
WSA1
57
E
150.0
120.0
T2A527131
~
25.50 (64.8)
24.40 (62.0)
19.40 (49.3)
350 (158.8)
F
①
NA
WSA1
57
E
225.0
180.0
T2A527151
~
29.41 (74.7)
28.15 (71.5)
22.37 (56.8)
600 (272.0)
F
①
NA
WSA2
57
E
300.0
240.0
T2A527171
~
29.41 (74.7)
28.15 (71.5)
22.37 (56.8)
650 (294.8)
F
NA
WSA2
57
E
450.0
360.0
T2A527181
~
35.47 (90.1)
31.90 (81.0)
26.88 (68.3)
750 (340.0)
F
NA
WSA3
57
E
500.0
400.0
T2A527191
~
35.47 (90.1)
31.90 (81.0)
26.88 (68.3)
790 (358.3)
F
NA
WSA3
57
E
Notes: Autotransformer DOE 2106 exempt
①
Wall mounting brackets are available for these sizes, refer to page 217.
②
If used on unbalanced loads, these units should only be used on a 4 wire system with the supply neutral connected to the transformer. If used on balanced loads, such as motor loads,
then they may be used on a 3 wire system without a neutral or 4th wire.
}
These units are encapsulated with a 115° C temperature rise.
~
These units are ventilated with 150° C temperature rise.
Wall mounting brackets use PL-79912
480 PRIMARY (open delta) VOLTS —
240 SECONDARY (open delta) VOLTS — 3Ø, 60 Hz THREE PHASE
kVA
①
Quantity
②
Catalog Number
}
Primary Full
Load Amps
Secondary Full
Load Amps
Maximum Size Fuse
or Breaker
3.0
2
T253010S
3.60
7.20
10
5.0
2
T253011S
6.00
12.00
10
6.0
2
T253012S
7.20
14.40
15
10.0
2
T2530134S
12.00
24.00
15
17.0
2
T2530144S
20.50
40.80
30
26.0
2
T2535153S
31.50
63.00
40
34.0
2
T2535163S
41.00
81.60
60
52.0
2
T2535173S
63.00
125.00
80
86.0
2
T2535183S
104.00
206.30
150
130.5
2
TP530193S
157.00
314.00
200
173.0
2
TP530203S
209.00
418.00
300
259.0
2
TP530213S
312.00
623.00
400
346.0
2
TP530223S
417.00
834.00
600
578.0
2
TP530233S
696.00
1392.00
1000
865.0
2
TP530243S
1041.00
2082.00
1600
①
kVA capacity of three phase autotransformer bank, using two single phase, 60 Hz transformers connected
open delta
②
Catalog No. is for 1 transformer, 2 units are required.
}
Can be reverse connected with no change in kVA.
~
For transformer dimensions, refer to appropriate table in section 1, page 23.
For proper overcurrent protection, refer to Article 450-4 of N.E.C
.
The diagram is for illustration purposes only. Please contact the
factory for construction details. Each Acme transformer is shipped
with detailed wiring diagrams. Refer to nameplate located inside the
front cover for specific voltage tap combinations.
ECONOMICAL AUTO ARRANGEMENTS
0 = Fuse location NEC 450-4, 2014
All Wiring Diagrams begin on page 209.