Distribution
Transformers
Single phase overhead transformer(amorphous core)
GENERAL
Linkage electric company
manufactures series of single-phase
overhead-type distribution
transformers. Single-phase
transformers are available as
conventional (5~167kVA), in a variety
of ratings to meet or exceed the
requirements of applicable ANSI® and
NEMA® standards. Units designed per
CHINSES NATION CODE AND
TAIPOWER Utilities Service standards
are also available.
More than ever, electric utilities and
other users of distribution transformers
are emphasizing sustainability and
looking for technologies that can lower
operating costs, improve energy
savings, and reduce environmental
impact. Linkage’ s amorphous metal
distribution transformer (AMDT) is the
product of choice to help achieve these
important objectives.
We use the high quality amorphous
ribbon form Hitachi Metals, Ltd. Japan.
These low loss, high permeability
alloys have excellent performance for
single and three phase commercial,
industrial and distribution transformer
applications.
STANDARD FEATURES
￭ Meet or exceeds ANSI pole type
transformer and NEMA standards
￭ Tank coating exceeds IEEE Std
C57.12.31™-2010 standard
￭ Tin-plated high and low-voltage
bushing terminals to accommodate
aluminum or copper conductors
￭ Wet process porcelain high-voltage
bushings resistant to high-voltage
corona
￭ Tank grounding provisions
￭ Electrical grade mineral oil
￭ Heavy-duty lifting lugs and hanger
brackets per ANSI® requirements
￭ Visible cover ground on units with
cover-mounted bushings
￭ Recessed tank bottom that offers
protection when sliding over rough
surfaces
￭ Automatic pressure relief device
￭ Arrester mounting and grounding
provisions(as customer requirement)
￭ Internal mark indicating the proper
oil level
￭ Permanently stamped secondary
leads to ensure proper identification
￭ Corrosion-resistant cover band
OPTIONAL ACCESSORIES
￭ Taps either two 2.5 % above and
below; NEMA® taps or special taps
as customer require.
￭ Externally-operable tap changer
switches for safe operation
￭ High corrosion area protection with
stainless steel hardware and
tanks(as customer request)
￭ Cover with a minimum dielectric
strength of 15 kV
￭ Extra creep high voltage bushings
(up to 150 kV BIL)
￭ Porcelain low-voltage bushings
￭ Special designs conforming to
international specifications
￭ Drain/sampling valve
Figure 1.
Amorphous core
Figure 2.
Amorphous core transformers
1
Distribution
Transformers
Single phase overhead transformer(amorphous core)
HIGH-VOLTAGE BUSHING
LIFTING LUGS
PRESSURE RELIEF
TAP CHANGER
LOW-VOLTAGE
TERMINAL
LOW VOLTAGE
NAMEPLATE
GROUND PAD
CAPACITY
MARKING
2 COATS OF LIGHTS GRAY PAINT,ANSI COLOR 70
OVER SUITABLE PRIME COAT
Figure 3.
Single-phase convention overhead transformer
2
Distribution
Transformers
Single phase overhead transformer(amorphous core)
SINGLE-PHASE OVERHEAD
CONVENTIONAL
Product Scope: kVA: 10-100 kVA
Primary Voltage: 7620-13,800 V
Secondary Voltage: 120-480 V
TABLE 1
Typical Characteristic, losses, Dimensions and Weights
kVA
HV Rating(V)
LV Rating(V)
5
10
7.62/13.8kV
240/120V
15
25
37.5
50
75
100
167
BIL 95kV
5
10
22.86/13.2kV
240/120V
BIL 125kV
BIL 30kV
15
25
37.5
50
75
100
167
BIL 30kV
No Load
Load Loss
Loss (Watt)
(Watt)
8
12
Dimensions(mm)
Approx.
Weight (kgs.)
“ A”
“ B”
“ C”
75
120
820
840
460
470
540
550
110
130
15
18
30
32
45
50
65
195
290
360
500
650
850
1410
860
870
890
910
1040
1060
1100
490
550
590
613
640
660
700
570
640
680
700
760
780
850
155
220
270
320
430
500
650
8
12
75
120
850
890
470
490
550
570
120
150
15
18
30
32
45
50
65
195
290
360
500
650
850
1410
930
950
970
990
1120
1120
1155
510
570
610
630
670
710
750
590
650
690
710
780
820
890
175
240
290
355
460
530
680
Distribution
Transformers
Single phase overhead transformer(amorphous core)
Dimensions(mm)
kVA
25
37.5
50
75
100
167
HV Rating(V)
No Load Load Loss
LV Rating(V)
Loss (Watt)
(Watt)
23KV
240/120V
BIL 125kV
BIL 30kV
120/240V
18
30
32
45
50
65
290
360
500
650
850
1410
“ A”
990
1010
1030
1160
1160
1200
“ B”
“ C”
570
610
630
670
710
750
650
690
710
780
820
890
Approx.
Weight (kgs.)
255
305
375
480
550
700
4