2026-04-17T11:03:55+02:00
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2026-04-17T11:03:55+02:00
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granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
Status:
S
t
a
t
u
s
:
Relevant
R
e
l
e
v
a
n
t
Version:
V
e
r
s
i
o
n
:
4.0
4
.
0
TR3123
T
R
3
1
2
3
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Project
P
r
o
j
e
c
t
development
d
e
v
e
l
o
p
m
e
n
t
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
e
r
s
i
o
n
4.0,
4
.
0
,
Document
D
o
c
u
m
e
n
t
replaces
r
e
p
l
a
c
e
s
version
v
e
r
s
i
o
n
3.02
3
.
0
2
Relevant
R
e
l
e
v
a
n
t
versions:
v
e
r
s
i
o
n
s
:
3.01
3
.
0
1
(2017-09-08
(
2
0
1
7
-
0
9
-
0
8
14:41)
1
4
:
4
1
)
3.02
3
.
0
2
(2019-06-05
(
2
0
1
9
-
0
6
-
0
5
13:56)
1
3
:
5
6
)
4.0
4
.
0
(2021-07-09
(
2
0
2
1
-
0
7
-
0
9
18:30)
1
8
:
3
0
)
Project
P
r
o
j
e
c
t
development,
d
e
v
e
l
o
p
m
e
n
t
,
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
e
r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
1
1
of
o
f
11
1
1
granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
1
1
Objective,
O
b
j
e
c
t
i
v
e
,
target
t
a
r
g
e
t
group
g
r
o
u
p
and
a
n
d
provision
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3
1.1
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Objective
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Target
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group
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3
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1.3
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Provision
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3
3
2
2
Common
C
o
m
m
o
n
design
d
e
s
i
g
n
requirements
r
e
q
u
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r
e
m
e
n
t
s
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4
4
2.1
2
.
1
Neutral
N
e
u
t
r
a
l
points
p
o
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t
s
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4
4
2.2
2
.
2
Terminals
T
e
r
m
i
n
a
l
s
and
a
n
d
wiring
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4
4
2.3
2
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Labelling
L
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4
4
2.4
2
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4
Vibration
V
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b
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damper
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4
4
2.5
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Painting
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4
4
3
3
Liquid-immersed
L
i
q
u
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d
-
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m
m
e
r
s
e
d
transformers
t
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s
f
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4
4
3.1
3
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1
Insulating
I
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l
a
t
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n
g
liquid
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4
4
3.2
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Access
A
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internals
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5
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3.3
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Bushings
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5
5
3.4
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Tank
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5
5
4
4
Dry
D
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y
insulated
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5
4.1
4
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1
Windings
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5
5
4.2
4
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2
Protective
P
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t
e
c
t
i
v
e
housing
h
o
u
s
i
n
g
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6
6
4.3
4
.
3
Testing
T
e
s
t
i
n
g
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6
6
5
5
Additional
A
d
d
i
t
i
o
n
a
l
information
i
n
f
o
r
m
a
t
i
o
n
.
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.
7
7
5.1
5
.
1
Definitions
D
e
f
i
n
i
t
i
o
n
s
and
a
n
d
abbreviations
a
b
b
r
e
v
i
a
t
i
o
n
s
.
.
.
.
.
.
.
.
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.
7
7
5.2
5
.
2
Changes
C
h
a
n
g
e
s
from
f
r
o
m
previous
p
r
e
v
i
o
u
s
version
v
e
r
s
i
o
n
.
.
.
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.
.
8
8
5.3
5
.
3
References
R
e
f
e
r
e
n
c
e
s
.
.
.
.
.
.
.
.
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.
.
9
9
Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
Project
P
r
o
j
e
c
t
development,
d
e
v
e
l
o
p
m
e
n
t
,
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
e
r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
2
2
of
o
f
11
1
1
granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
This
T
h
i
s
document
d
o
c
u
m
e
n
t
and
a
n
d
its
i
t
s
content,
c
o
n
t
e
n
t
,
is
i
s
for
f
o
r
authorized
a
u
t
h
o
r
i
z
e
d
company
c
o
m
p
a
n
y
use
u
s
e
only
o
n
l
y
1
1
Objective,
O
b
j
e
c
t
i
v
e
,
target
t
a
r
g
e
t
group
g
r
o
u
p
and
a
n
d
provision
p
r
o
v
i
s
i
o
n
1.1
1
.
1
Objective
O
b
j
e
c
t
i
v
e
The
T
h
e
specification
s
p
e
c
i
f
i
c
a
t
i
o
n
establishes
e
s
t
a
b
l
i
s
h
e
s
requirements
r
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
design,
d
e
s
i
g
n
,
construction
c
o
n
s
t
r
u
c
t
i
o
n
and
a
n
d
testing
t
e
s
t
i
n
g
of
o
f
high
h
i
g
h
voltage
v
o
l
t
a
g
e
transformers
t
r
a
n
s
f
o
r
m
e
r
s
for
f
o
r
onshore
o
n
s
h
o
r
e
and
a
n
d
offshore
o
f
f
s
h
o
r
e
service.
s
e
r
v
i
c
e
.
The
T
h
e
specification
s
p
e
c
i
f
i
c
a
t
i
o
n
contains
c
o
n
t
a
i
n
s
three
t
h
r
e
e
parts.
p
a
r
t
s
.
Section
S
e
c
t
i
o
n
2
2
is
i
s
valid
v
a
l
i
d
for
f
o
r
all
a
l
l
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
section
s
e
c
t
i
o
n
3
3
is
i
s
applicable
a
p
p
l
i
c
a
b
l
e
to
t
o
liquid-immersed
l
i
q
u
i
d
-
i
m
m
e
r
s
e
d
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
and
a
n
d
section
s
e
c
t
i
o
n
4
4
is
i
s
applicable
a
p
p
l
i
c
a
b
l
e
for
f
o
r
dry
d
r
y
insulated
i
n
s
u
l
a
t
e
d
transformers.
t
r
a
n
s
f
o
r
m
e
r
s
.
The
T
h
e
referred
r
e
f
e
r
r
e
d
standards
s
t
a
n
d
a
r
d
s
are
a
r
e
either
e
i
t
h
e
r
based
b
a
s
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d
on
o
n
IEC
I
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C
or
o
r
based
b
a
s
e
d
on
o
n
IEEE.
I
E
E
E
.
The
T
h
e
standards
s
t
a
n
d
a
r
d
s
have
h
a
v
e
been
b
e
e
n
referred
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e
f
e
r
r
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d
to
t
o
by
b
y
one
o
n
e
common
c
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m
m
o
n
number
n
u
m
b
e
r
as
a
s
shown
s
h
o
w
n
in
i
n
section
s
e
c
t
i
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n
5.3.
5
.
3
.
The
T
h
e
IEEE
I
E
E
E
standards
s
t
a
n
d
a
r
d
s
are
a
r
e
applicable
a
p
p
l
i
c
a
b
l
e
in
i
n
US
U
S
or
o
r
Canada,
C
a
n
a
d
a
,
while
w
h
i
l
e
IEC
I
E
C
standards
s
t
a
n
d
a
r
d
s
are
a
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applicable
a
p
p
l
i
c
a
b
l
e
elsewhere.
e
l
s
e
w
h
e
r
e
.
SR-47869
S
R
-
4
7
8
6
9
-
-
The
T
h
e
requirements
r
e
q
u
i
r
e
m
e
n
t
s
in
i
n
this
t
h
i
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document
d
o
c
u
m
e
n
t
shall
s
h
a
l
l
be
b
e
used
u
s
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d
in
i
n
addition
a
d
d
i
t
i
o
n
to
t
o
IOGP
I
O
G
P
S-720
S
-
7
2
0
specification
s
p
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c
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f
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c
a
t
i
o
n
and
a
n
d
datasheet
d
a
t
a
s
h
e
e
t
ST518
S
T
5
1
8
The
T
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specification
s
p
e
c
i
f
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c
a
t
i
o
n
can
c
a
n
be
b
e
used
u
s
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d
for
f
o
r
low
l
o
w
voltage
v
o
l
t
a
g
e
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
such
s
u
c
h
as
a
s
690
6
9
0
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-
400
4
0
0
V
V
transformers.
t
r
a
n
s
f
o
r
m
e
r
s
.
1.2
1
.
2
Target
T
a
r
g
e
t
group
g
r
o
u
p
The
T
h
e
target
t
a
r
g
e
t
group
g
r
o
u
p
for
f
o
r
this
t
h
i
s
document
d
o
c
u
m
e
n
t
is
i
s
personnel
p
e
r
s
o
n
n
e
l
involved
i
n
v
o
l
v
e
d
in
i
n
preparing
p
r
e
p
a
r
i
n
g
technical
t
e
c
h
n
i
c
a
l
and
a
n
d
operational
o
p
e
r
a
t
i
o
n
a
l
requirements
r
e
q
u
i
r
e
m
e
n
t
s
and
a
n
d
standards
s
t
a
n
d
a
r
d
s
to
t
o
be
b
e
applied
a
p
p
l
i
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d
in
i
n
project
p
r
o
j
e
c
t
development
d
e
v
e
l
o
p
m
e
n
t
work
w
o
r
k
for
f
o
r
oil
o
i
l
and
a
n
d
gas.
g
a
s
.
1.3
1
.
3
Provision
P
r
o
v
i
s
i
o
n
Provision
P
r
o
v
i
s
i
o
n
is
i
s
made
m
a
d
e
in
i
n
Management
M
a
n
a
g
e
m
e
n
t
System
S
y
s
t
e
m
(TR3020
(
T
R
3
0
2
0
Electrical,
E
l
e
c
t
r
i
c
a
l
,
Technical
T
e
c
h
n
i
c
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
and
a
n
d
Standards).
S
t
a
n
d
a
r
d
s
)
.
2
2
Common
C
o
m
m
o
n
design
d
e
s
i
g
n
requirements
r
e
q
u
i
r
e
m
e
n
t
s
Project
P
r
o
j
e
c
t
development,
d
e
v
e
l
o
p
m
e
n
t
,
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3f
T
R
3
f
23,
2
3
,
Version
V
e
r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
3
3
of
o
f
11
1
1
granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
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n
:
Internal
I
n
t
e
r
n
a
l
2.1
2
.
1
Neutral
N
e
u
t
r
a
l
points
p
o
i
n
t
s
For
F
o
r
Neutral
N
e
u
t
r
a
l
Earth
E
a
r
t
h
Resistors
R
e
s
i
s
t
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(NER),
(
N
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R
)
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see
s
e
e
requirements
r
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q
u
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r
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m
e
n
t
s
in
i
n
TR3120.
T
R
3
1
2
0
.
2.2
2
.
2
Terminals
T
e
r
m
i
n
a
l
s
and
a
n
d
wiring
w
i
r
i
n
g
Reference
R
e
f
e
r
e
n
c
e
is
i
s
made
m
a
d
e
to
t
o
TR3120
T
R
3
1
2
0
section
s
e
c
t
i
o
n
4.11
4
.
1
1
regarding
r
e
g
a
r
d
i
n
g
marking
m
a
r
k
i
n
g
of
o
f
internal
i
n
t
e
r
n
a
l
components
c
o
m
p
o
n
e
n
t
s
and
a
n
d
wiring.
w
i
r
i
n
g
.
Reference
R
e
f
e
r
e
n
c
e
is
i
s
made
m
a
d
e
to
t
o
TR3120
T
R
3
1
2
0
section
s
e
c
t
i
o
n
4.17
4
.
1
7
regarding
r
e
g
a
r
d
i
n
g
light
l
i
g
h
t
fixture
f
i
x
t
u
r
e
and
a
n
d
space
s
p
a
c
e
heaters
h
e
a
t
e
r
s
inside
i
n
s
i
d
e
cabinets.
c
a
b
i
n
e
t
s
.
Reference
R
e
f
e
r
e
n
c
e
is
i
s
made
m
a
d
e
to
t
o
TR3120
T
R
3
1
2
0
section
s
e
c
t
i
o
n
4.8
4
.
8
regarding
r
e
g
a
r
d
i
n
g
earthing
e
a
r
t
h
i
n
g
of
o
f
the
t
h
e
transformer
t
r
a
n
s
f
o
r
m
e
r
(high
(
h
i
g
h
voltage
v
o
l
t
a
g
e
equipment).
e
q
u
i
p
m
e
n
t
)
.
2.3
2
.
3
Labelling
L
a
b
e
l
l
i
n
g
Reference
R
e
f
e
r
e
n
c
e
is
i
s
made
m
a
d
e
to
t
o
TR3120
T
R
3
1
2
0
regarding
r
e
g
a
r
d
i
n
g
the
t
h
e
requirements
r
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
labelling.
l
a
b
e
l
l
i
n
g
.
2.4
2
.
4
Vibration
V
i
b
r
a
t
i
o
n
damper
d
a
m
p
e
r
SR-47917
S
R
-
4
7
9
1
7
-
-
Use
U
s
e
of
o
f
vibration
v
i
b
r
a
t
i
o
n
dampers
d
a
m
p
e
r
s
shall
s
h
a
l
l
be
b
e
evaluated
e
v
a
l
u
a
t
e
d
to
t
o
ensure
e
n
s
u
r
e
that
t
h
a
t
transformers
t
r
a
n
s
f
o
r
m
e
r
s
do
d
o
not
n
o
t
cause
c
a
u
s
e
unwanted
u
n
w
a
n
t
e
d
vibration
v
i
b
r
a
t
i
o
n
and
a
n
d
noise
n
o
i
s
e
to
t
o
their
t
h
e
i
r
surroundings.
s
u
r
r
o
u
n
d
i
n
g
s
.
2.5
2
.
5
Painting
P
a
i
n
t
i
n
g
SR-98074
S
R
-
9
8
0
7
4
-
-
Painting
P
a
i
n
t
i
n
g
shall
s
h
a
l
l
be
b
e
in
i
n
accordance
a
c
c
o
r
d
a
n
c
e
to
t
o
TR0042
T
R
0
0
4
2
and
a
n
d
IOGP
I
O
G
P
S-715.
S
-
7
1
5
.
3
3
Liquid-immersed
L
i
q
u
i
d
-
i
m
m
e
r
s
e
d
transformers
t
r
a
n
s
f
o
r
m
e
r
s
3.1
3
.
1
Insulating
I
n
s
u
l
a
t
i
n
g
liquid
l
i
q
u
i
d
SR-98075
S
R
-
9
8
0
7
5
-
-
Use
U
s
e
of
o
f
insulation
i
n
s
u
l
a
t
i
o
n
liquids
l
i
q
u
i
d
s
for
f
o
r
allowing
a
l
l
o
w
i
n
g
temperatures
t
e
m
p
e
r
a
t
u
r
e
s
above
a
b
o
v
e
105°C,
1
0
5
°
C
,
e.g.
e
.
g
.
listed
l
i
s
t
e
d
in
i
n
IEC
I
E
C
60076-14,
6
0
0
7
6
-
1
4
,
shall
s
h
a
l
l
not
n
o
t
be
b
e
used
u
s
e
d
for
f
o
r
transformers
t
r
a
n
s
f
o
r
m
e
r
s
with
w
i
t
h
U
U
m
m
equal
e
q
u
a
l
to
t
o
or
o
r
above
a
b
o
v
e
170
1
7
0
kV
k
V
for
f
o
r
IEC
I
E
C
specifications
s
p
e
c
i
f
i
c
a
t
i
o
n
s
due
d
u
e
to
t
o
the
t
h
e
limited
l
i
m
i
t
e
d
experience
e
x
p
e
r
i
e
n
c
e
of
o
f
dielectric
d
i
e
l
e
c
t
r
i
c
withstand
w
i
t
h
s
t
a
n
d
capability
c
a
p
a
b
i
l
i
t
y
of
o
f
such
s
u
c
h
insulating
i
n
s
u
l
a
t
i
n
g
liquids.
l
i
q
u
i
d
s
.
The
T
h
e
high
h
i
g
h
temperature
t
e
m
p
e
r
a
t
u
r
e
design
d
e
s
i
g
n
should
s
h
o
u
l
d
be
b
e
based
b
a
s
e
d
on
o
n
hybrid
h
y
b
r
i
d
insulation
i
n
s
u
l
a
t
i
o
n
system.
s
y
s
t
e
m
.
The
T
h
e
average
a
v
e
r
a
g
e
temperature
t
e
m
p
e
r
a
t
u
r
e
rise
r
i
s
e
of
o
f
the
t
h
e
transformer
t
r
a
n
s
f
o
r
m
e
r
windings
w
i
n
d
i
n
g
s
at
a
t
rated
r
a
t
e
d
power
p
o
w
e
r
should
s
h
o
u
l
d
not
n
o
t
exceed
e
x
c
e
e
d
95
9
5
K,
K
,
and
a
n
d
the
t
h
e
top
t
o
p
oil
o
i
l
temperature
t
e
m
p
e
r
a
t
u
r
e
should
s
h
o
u
l
d
not
n
o
t
exceed
e
x
c
e
e
d
60
6
0
K.
K
.
Reference
R
e
f
e
r
e
n
c
e
to
t
o
other
o
t
h
e
r
requirements
r
e
q
u
i
r
e
m
e
n
t
s
in
i
n
IEC
I
E
C
60076-14.
6
0
0
7
6
-
1
4
.
Minimum
M
i
n
i
m
u
m
thermal
t
h
e
r
m
a
l
class
c
l
a
s
s
for
f
o
r
the
t
h
e
high-temperature
h
i
g
h
-
t
e
m
p
e
r
a
t
u
r
e
solid
s
o
l
i
d
insulation
i
n
s
u
l
a
t
i
o
n
should
s
h
o
u
l
d
be
b
e
155
1
5
5
°C.
°
C
.
Project
P
r
o
j
e
c
t
development,
d
e
v
e
l
o
p
m
e
n
t
,
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
e
r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
4
4
of
o
f
11
1
1
granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
3.2
3
.
2
Access
A
c
c
e
s
s
to
t
o
internals
i
n
t
e
r
n
a
l
s
SR-47936
S
R
-
4
7
9
3
6
-
-
Liquid
L
i
q
u
i
d
filled
f
i
l
l
e
d
units
u
n
i
t
s
shall
s
h
a
l
l
be
b
e
equipped
e
q
u
i
p
p
e
d
with
w
i
t
h
man
m
a
n
holes
h
o
l
e
s
to
t
o
perform
p
e
r
f
o
r
m
access
a
c
c
e
s
s
to
t
o
OLTC,
O
L
T
C
,
bushings
b
u
s
h
i
n
g
s
and
a
n
d
other
o
t
h
e
r
internal
i
n
t
e
r
n
a
l
inspection
i
n
s
p
e
c
t
i
o
n
points
p
o
i
n
t
s
if
i
f
relevant.
r
e
l
e
v
a
n
t
.
3.3
3
.
3
Bushings
B
u
s
h
i
n
g
s
Type
T
y
p
e
of
o
f
bushings
b
u
s
h
i
n
g
s
will
w
i
l
l
be
b
e
described
d
e
s
c
r
i
b
e
d
in
i
n
datasheet.
d
a
t
a
s
h
e
e
t
.
SR-47958
S
R
-
4
7
9
5
8
-
-
For
F
o
r
plug-in
p
l
u
g
-
i
n
type
t
y
p
e
bushing
b
u
s
h
i
n
g
or
o
r
equivalent
e
q
u
i
v
a
l
e
n
t
touch
t
o
u
c
h
proof
p
r
o
o
f
solution,
s
o
l
u
t
i
o
n
,
a
a
portable
p
o
r
t
a
b
l
e
earthing
e
a
r
t
h
i
n
g
device
d
e
v
i
c
e
shall
s
h
a
l
l
be
b
e
delivered,
d
e
l
i
v
e
r
e
d
,
if
i
f
not
n
o
t
otherwise
o
t
h
e
r
w
i
s
e
stated.
s
t
a
t
e
d
.
SR-47959
S
R
-
4
7
9
5
9
-
-
It
I
t
shall
s
h
a
l
l
be
b
e
provision
p
r
o
v
i
s
i
o
n
for
f
o
r
measuring
m
e
a
s
u
r
i
n
g
voltage
v
o
l
t
a
g
e
at
a
t
the
t
h
e
bushing
b
u
s
h
i
n
g
to
t
o
be
b
e
able
a
b
l
e
to
t
o
check
c
h
e
c
k
if
i
f
the
t
h
e
transformer
t
r
a
n
s
f
o
r
m
e
r
is
i
s
energized.
e
n
e
r
g
i
z
e
d
.
3.4
3
.
4
Tank
T
a
n
k
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
with
w
i
t
h
U
U
m
m
equal
e
q
u
a
l
to
t
o
or
o
r
above
a
b
o
v
e
24
2
4
kV
k
V
should
s
h
o
u
l
d
have
h
a
v
e
a
a
diaphragm-type
d
i
a
p
h
r
a
g
m
-
t
y
p
e
oil
o
i
l
preservation
p
r
e
s
e
r
v
a
t
i
o
n
system
s
y
s
t
e
m
to
t
o
avoid
a
v
o
i
d
direct
d
i
r
e
c
t
contact
c
o
n
t
a
c
t
between
b
e
t
w
e
e
n
the
t
h
e
transformer
t
r
a
n
s
f
o
r
m
e
r
oil
o
i
l
and
a
n
d
air.
a
i
r
.
A
A
flexible
f
l
e
x
i
b
l
e
diaphragm
d
i
a
p
h
r
a
g
m
or
o
r
bladder
b
l
a
d
d
e
r
should
s
h
o
u
l
d
be
b
e
used
u
s
e
d
for
f
o
r
this
t
h
i
s
purpose.
p
u
r
p
o
s
e
.
SR-47972
S
R
-
4
7
9
7
2
-
-
316L
3
1
6
L
stainless
s
t
a
i
n
l
e
s
s
steel
s
t
e
e
l
shall
s
h
a
l
l
be
b
e
used
u
s
e
d
for
f
o
r
fasteners
f
a
s
t
e
n
e
r
s
(screws,
(
s
c
r
e
w
s
,
bolts,
b
o
l
t
s
,
nuts,
n
u
t
s
,
etc.)
e
t
c
.
)
up
u
p
to
t
o
and
a
n
d
including
i
n
c
l
u
d
i
n
g
a
a
diameter
d
i
a
m
e
t
e
r
of
o
f
10
1
0
mm.
m
m
.
For
F
o
r
diameters
d
i
a
m
e
t
e
r
s
above
a
b
o
v
e
10
1
0
mm
m
m
fasteners
f
a
s
t
e
n
e
r
s
shall
s
h
a
l
l
be
b
e
hot
h
o
t
dip
d
i
p
galvanised
g
a
l
v
a
n
i
s
e
d
in
i
n
accordance
a
c
c
o
r
d
a
n
c
e
with
w
i
t
h
ASTM
A
S
T
M
A153
A
1
5
3
or
o
r
coated
c
o
a
t
e
d
with
w
i
t
h
PTFE
P
T
F
E
with
w
i
t
h
anticorrosion
a
n
t
i
c
o
r
r
o
s
i
o
n
pre-treatment.
p
r
e
-
t
r
e
a
t
m
e
n
t
.
The
T
h
e
requirement
r
e
q
u
i
r
e
m
e
n
t
for
f
o
r
fasteners
f
a
s
t
e
n
e
r
s
does
d
o
e
s
not
n
o
t
apply
a
p
p
l
y
to
t
o
fasteners
f
a
s
t
e
n
e
r
s
inside
i
n
s
i
d
e
the
t
h
e
transformer
t
r
a
n
s
f
o
r
m
e
r
tank.
t
a
n
k
.
4
4
Dry
D
r
y
insulated
i
n
s
u
l
a
t
e
d
transformers
t
r
a
n
s
f
o
r
m
e
r
s
4.1
4
.
1
Windings
W
i
n
d
i
n
g
s
See
S
e
e
section
s
e
c
t
i
o
n
2.3
2
.
3
in
i
n
this
t
h
i
s
document
d
o
c
u
m
e
n
t
for
f
o
r
general
g
e
n
e
r
a
l
requirements.
r
e
q
u
i
r
e
m
e
n
t
s
.
The
T
h
e
insulation
i
n
s
u
l
a
t
i
o
n
level
l
e
v
e
l
will
w
i
l
l
be
b
e
according
a
c
c
o
r
d
i
n
g
to:
t
o
:
List
L
i
s
t
2
2
in
i
n
table
t
a
b
l
e
3
3
of
o
f
section
s
e
c
t
i
o
n
12.1
1
2
.
1
for
f
o
r
the
t
h
e
IEC-based
I
E
C
-
b
a
s
e
d
specification
s
p
e
c
i
f
i
c
a
t
i
o
n
IEC
I
E
C
60076-11.
6
0
0
7
6
-
1
1
.
The
T
h
e
highest
h
i
g
h
e
s
t
indicated
i
n
d
i
c
a
t
e
d
basic
b
a
s
i
c
lightning
l
i
g
h
t
n
i
n
g
impulse
i
m
p
u
l
s
e
level
l
e
v
e
l
stated
s
t
a
t
e
d
in
i
n
table
t
a
b
l
e
5
5
in
i
n
section
s
e
c
t
i
o
n
5.10
5
.
1
0
for
f
o
r
the
t
h
e
IEEE
I
E
E
E
based
b
a
s
e
d
specification
s
p
e
c
i
f
i
c
a
t
i
o
n
IEEE
I
E
E
E
C57.12.01
C
5
7
.
1
2
.
0
1
and
a
n
d
IEEE
I
E
E
E
C57.12.91.
C
5
7
.
1
2
.
9
1
.
The
T
h
e
minimum
m
i
n
i
m
u
m
winding
w
i
n
d
i
n
g
insulation
i
n
s
u
l
a
t
i
o
n
class
c
l
a
s
s
should
s
h
o
u
l
d
be:
b
e
:
Project
P
r
o
j
e
c
t
development,
d
e
v
e
l
o
p
m
e
n
t
,
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
e
r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
5
5
of
o
f
11
1
1
granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
155°C
1
5
5
°
C
(insulation
(
i
n
s
u
l
a
t
i
o
n
class
c
l
a
s
s
F)
F
)
for
f
o
r
IEC
I
E
C
based
b
a
s
e
d
specifications
s
p
e
c
i
f
i
c
a
t
i
o
n
s
(IEC
(
I
E
C
60076-11)
6
0
0
7
6
-
1
1
)
150°C
1
5
0
°
C
for
f
o
r
IEEE
I
E
E
E
based
b
a
s
e
d
specifications
s
p
e
c
i
f
i
c
a
t
i
o
n
s
(IEEE
(
I
E
E
E
C57.12.01
C
5
7
.
1
2
.
0
1
and
a
n
d
IEEE
I
E
E
E
C57.12.91).
C
5
7
.
1
2
.
9
1
)
.
The
T
h
e
windings
w
i
n
d
i
n
g
s
should
s
h
o
u
l
d
be
b
e
solid-casted
s
o
l
i
d
-
c
a
s
t
e
d
or
o
r
VPI.
V
P
I
.
Reference
R
e
f
e
r
e
n
c
e
is
i
s
made
m
a
d
e
to
t
o
IOGP
I
O
G
P
S-720
S
-
7
2
0
datasheet.
d
a
t
a
s
h
e
e
t
.
SR-47991
S
R
-
4
7
9
9
1
-
-
All
A
l
l
terminals
t
e
r
m
i
n
a
l
s
shall
s
h
a
l
l
be
b
e
of
o
f
copper
c
o
p
p
e
r
type.
t
y
p
e
.
This
T
h
i
s
also
a
l
s
o
applies
a
p
p
l
i
e
s
when
w
h
e
n
aluminium
a
l
u
m
i
n
i
u
m
windings
w
i
n
d
i
n
g
s
is
i
s
specified.
s
p
e
c
i
f
i
e
d
.
4.2
4
.
2
Protective
P
r
o
t
e
c
t
i
v
e
housing
h
o
u
s
i
n
g
See
S
e
e
requirements
r
e
q
u
i
r
e
m
e
n
t
s
in
i
n
TR3120.
T
R
3
1
2
0
.
SR-48004
S
R
-
4
8
0
0
4
-
-
The
T
h
e
transformer
t
r
a
n
s
f
o
r
m
e
r
shall
s
h
a
l
l
be
b
e
in
i
n
a
a
housing
h
o
u
s
i
n
g
that
t
h
a
t
is
i
s
cooled
c
o
o
l
e
d
by
b
y
external
e
x
t
e
r
n
a
l
air
a
i
r
or
o
r
water
w
a
t
e
r
SR-48006
S
R
-
4
8
0
0
6
-
-
Doors
D
o
o
r
s
and
a
n
d
panels
p
a
n
e
l
s
shall
s
h
a
l
l
be
b
e
hinged.
h
i
n
g
e
d
.
There
T
h
e
r
e
shall
s
h
a
l
l
be
b
e
isolating
i
s
o
l
a
t
i
n
g
bars
b
a
r
s
behind
b
e
h
i
n
d
the
t
h
e
doors.
d
o
o
r
s
.
The
T
h
e
bars
b
a
r
s
shall
s
h
a
l
l
be
b
e
coloured
c
o
l
o
u
r
e
d
yellow
y
e
l
l
o
w
and
a
n
d
black
b
l
a
c
k
(zebra
(
z
e
b
r
a
stripes)
s
t
r
i
p
e
s
)
if
i
f
not
n
o
t
otherwise
o
t
h
e
r
w
i
s
e
required
r
e
q
u
i
r
e
d
by
b
y
national
n
a
t
i
o
n
a
l
regulation.
r
e
g
u
l
a
t
i
o
n
.
4.3
4
.
3
Testing
T
e
s
t
i
n
g
SR-48016
S
R
-
4
8
0
1
6
-
-
The
T
h
e
following
f
o
l
l
o
w
i
n
g
non-routine
n
o
n
-
r
o
u
t
i
n
e
tests
t
e
s
t
s
shall
s
h
a
l
l
always
a
l
w
a
y
s
be
b
e
performed
p
e
r
f
o
r
m
e
d
(ref
(
r
e
f
IEC
I
E
C
60076-11
6
0
0
7
6
-
1
1
or
o
r
IEEE
I
E
E
E
C57.12.01
C
5
7
.
1
2
.
0
1
and
a
n
d
IEEE
I
E
E
E
C57.12.91
C
5
7
.
1
2
.
9
1
respectively):
r
e
s
p
e
c
t
i
v
e
l
y
)
:
Temperature-rise
T
e
m
p
e
r
a
t
u
r
e
-
r
i
s
e
test
t
e
s
t
together
t
o
g
e
t
h
e
r
with
w
i
t
h
the
t
h
e
planned
p
l
a
n
n
e
d
protective
p
r
o
t
e
c
t
i
v
e
housing
h
o
u
s
i
n
g
unless
u
n
l
e
s
s
otherwise
o
t
h
e
r
w
i
s
e
agreed
a
g
r
e
e
d
upon.
u
p
o
n
.
Partial
P
a
r
t
i
a
l
discharge
d
i
s
c
h
a
r
g
e
measurement
m
e
a
s
u
r
e
m
e
n
t
special
s
p
e
c
i
a
l
test.
t
e
s
t
.
Determination
D
e
t
e
r
m
i
n
a
t
i
o
n
of
o
f
capacitances
c
a
p
a
c
i
t
a
n
c
e
s
windings-to-earth
w
i
n
d
i
n
g
s
-
t
o
-
e
a
r
t
h
and
a
n
d
between
b
e
t
w
e
e
n
windings
w
i
n
d
i
n
g
s
for
f
o
r
all
a
l
l
converter
c
o
n
v
e
r
t
e
r
transformers.
t
r
a
n
s
f
o
r
m
e
r
s
.
If
I
f
several
s
e
v
e
r
a
l
identical
i
d
e
n
t
i
c
a
l
transformers
t
r
a
n
s
f
o
r
m
e
r
s
are
a
r
e
ordered,
o
r
d
e
r
e
d
,
the
t
h
e
non-routine
n
o
n
-
r
o
u
t
i
n
e
test
t
e
s
t
can
c
a
n
be
b
e
performed
p
e
r
f
o
r
m
e
d
on
o
n
one
o
n
e
transformer
t
r
a
n
s
f
o
r
m
e
r
only.
o
n
l
y
.
Project
P
r
o
j
e
c
t
development,
d
e
v
e
l
o
p
m
e
n
t
,
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
e
r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
6
6
of
o
f
11
1
1
granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
5
5
Additional
A
d
d
i
t
i
o
n
a
l
information
i
n
f
o
r
m
a
t
i
o
n
5.1
5
.
1
Definitions
D
e
f
i
n
i
t
i
o
n
s
and
a
n
d
abbreviations
a
b
b
r
e
v
i
a
t
i
o
n
s
Shall
S
h
a
l
l
(requirement)
(
r
e
q
u
i
r
e
m
e
n
t
)
Requirement
R
e
q
u
i
r
e
m
e
n
t
strictly
s
t
r
i
c
t
l
y
to
t
o
be
b
e
followed
f
o
l
l
o
w
e
d
in
i
n
order
o
r
d
e
r
to
t
o
confirm
c
o
n
f
i
r
m
to
t
o
the
t
h
e
document
d
o
c
u
m
e
n
t
and
a
n
d
from
f
r
o
m
which
w
h
i
c
h
no
n
o
deviation
d
e
v
i
a
t
i
o
n
is
i
s
permitted,
p
e
r
m
i
t
t
e
d
,
unless
u
n
l
e
s
s
a
a
deviation
d
e
v
i
a
t
i
o
n
permit
p
e
r
m
i
t
is
i
s
approved.
a
p
p
r
o
v
e
d
.
Should
S
h
o
u
l
d
(recommendation)
(
r
e
c
o
m
m
e
n
d
a
t
i
o
n
)
Indicates
I
n
d
i
c
a
t
e
s
that
t
h
a
t
among
a
m
o
n
g
several
s
e
v
e
r
a
l
possibilities
p
o
s
s
i
b
i
l
i
t
i
e
s
one
o
n
e
is
i
s
recommended
r
e
c
o
m
m
e
n
d
e
d
as
a
s
particularly
p
a
r
t
i
c
u
l
a
r
l
y
suitable,
s
u
i
t
a
b
l
e
,
without
w
i
t
h
o
u
t
mentioning
m
e
n
t
i
o
n
i
n
g
or
o
r
excluding
e
x
c
l
u
d
i
n
g
others,
o
t
h
e
r
s
,
or
o
r
that
t
h
a
t
a
a
certain
c
e
r
t
a
i
n
course
c
o
u
r
s
e
of
o
f
action
a
c
t
i
o
n
is
i
s
preferred
p
r
e
f
e
r
r
e
d
but
b
u
t
not
n
o
t
necessarily
n
e
c
e
s
s
a
r
i
l
y
required,
r
e
q
u
i
r
e
d
,
or
o
r
that
t
h
a
t
(in
(
i
n
the
t
h
e
negative
n
e
g
a
t
i
v
e
form)
f
o
r
m
)
possibility
p
o
s
s
i
b
i
l
i
t
y
or
o
r
course
c
o
u
r
s
e
of
o
f
action
a
c
t
i
o
n
is
i
s
deprecated
d
e
p
r
e
c
a
t
e
d
but
b
u
t
not
n
o
t
prohibited.
p
r
o
h
i
b
i
t
e
d
.
May
M
a
y
Indicates
I
n
d
i
c
a
t
e
s
a
a
course
c
o
u
r
s
e
of
o
f
action
a
c
t
i
o
n
permissible
p
e
r
m
i
s
s
i
b
l
e
within
w
i
t
h
i
n
the
t
h
e
limits
l
i
m
i
t
s
of
o
f
the
t
h
e
document.
d
o
c
u
m
e
n
t
.
Can
C
a
n
Statements
S
t
a
t
e
m
e
n
t
s
of
o
f
possibility
p
o
s
s
i
b
i
l
i
t
y
and
a
n
d
capability,
c
a
p
a
b
i
l
i
t
y
,
whether
w
h
e
t
h
e
r
material,
m
a
t
e
r
i
a
l
,
physical
p
h
y
s
i
c
a
l
or
o
r
causal.
c
a
u
s
a
l
.
AC
A
C
Alternating
A
l
t
e
r
n
a
t
i
n
g
current
c
u
r
r
e
n
t
AF
A
F
Air
A
i
r
Forced
F
o
r
c
e
d
AN
A
N
Air
A
i
r
Natural
N
a
t
u
r
a
l
Converter
C
o
n
v
e
r
t
e
r
transformer
t
r
a
n
s
f
o
r
m
e
r
Transformer
T
r
a
n
s
f
o
r
m
e
r
feeding
f
e
e
d
i
n
g
a
a
converter
c
o
n
v
e
r
t
e
r
load
l
o
a
d
CT
C
T
Current
C
u
r
r
e
n
t
Transformer
T
r
a
n
s
f
o
r
m
e
r
DEH
D
E
H
Direct
D
i
r
e
c
t
Electric
E
l
e
c
t
r
i
c
Heating
H
e
a
t
i
n
g
IP
I
P
Ingress
I
n
g
r
e
s
s
Protection
P
r
o
t
e
c
t
i
o
n
NER
N
E
R
Neutral
N
e
u
t
r
a
l
Earth
E
a
r
t
h
Resistor
R
e
s
i
s
t
o
r
OCTC
O
C
T
C
Off
O
f
f
Circuit
C
i
r
c
u
i
t
Tap
T
a
p
Changer
C
h
a
n
g
e
r
OFWF
O
F
W
F
Oil
O
i
l
Forced
F
o
r
c
e
d
Water
W
a
t
e
r
Forced
F
o
r
c
e
d
OLTC
O
L
T
C
On
O
n
Load
L
o
a
d
Tap
T
a
p
Changer
C
h
a
n
g
e
r
ONAF
O
N
A
F
Oil
O
i
l
Natural
N
a
t
u
r
a
l
Air
A
i
r
Forced
F
o
r
c
e
d
ONAN
O
N
A
N
Oil
O
i
l
Natural
N
a
t
u
r
a
l
Air
A
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granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
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latest
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updated
u
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IEEE
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requirements
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Deleted
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requirement
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reference
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requirement
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110
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all
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type
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be
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for
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thermal
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image
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4.3:
4
.
3
:
The
T
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transformer
t
r
a
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s
f
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m
e
r
core
c
o
r
e
shall
s
h
a
l
l
be
b
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dimensioned
d
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n
s
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for
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continuous
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at
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1
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%
%
of
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f
rated
r
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d
voltage
v
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l
t
a
g
e
referred
r
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f
e
r
r
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d
to
t
o
the
t
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principal
p
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c
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tapping
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p
p
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g
and
a
n
d
rated
r
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power.
p
o
w
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.
-
Section
S
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c
t
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4.6:
4
.
6
:
Fire
F
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r
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class
c
l
a
s
s
updated
u
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d
from
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r
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F0
F
0
to
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F1
F
1
Project
P
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development,
d
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v
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l
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p
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t
,
Requirements,
R
e
q
u
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r
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m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
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r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
8
8
of
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f
11
1
1
granularity=word tetml={elements={line} glyphdetails={all}} contentanalysis={punctuationbreaks=false dehyphenate=false shadowdetect=false} layoutanalysis={tabledetect=0 layoutdetect=3} structureanalysis={list=true}
Requirements:
R
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q
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s
:
Transformers
T
r
a
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s
f
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s
Classification:
C
l
a
s
s
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c
a
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i
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n
:
Internal
I
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t
e
r
n
a
l
5.3
5
.
3
References
R
e
f
e
r
e
n
c
e
s
The
T
h
e
documents
d
o
c
u
m
e
n
t
s
listed
l
i
s
t
e
d
below
b
e
l
o
w
include
i
n
c
l
u
d
e
provisions
p
r
o
v
i
s
i
o
n
s
and
a
n
d
guidelines
g
u
i
d
e
l
i
n
e
s
which,
w
h
i
c
h
,
through
t
h
r
o
u
g
h
reference
r
e
f
e
r
e
n
c
e
in
i
n
this
t
h
i
s
specification,
s
p
e
c
i
f
i
c
a
t
i
o
n
,
constitute
c
o
n
s
t
i
t
u
t
e
provisions
p
r
o
v
i
s
i
o
n
s
and
a
n
d
guidelines
g
u
i
d
e
l
i
n
e
s
of
o
f
this
t
h
i
s
specification.
s
p
e
c
i
f
i
c
a
t
i
o
n
.
SR-48025
S
R
-
4
8
0
2
5
-
-
Latest
L
a
t
e
s
t
issue
i
s
s
u
e
of
o
f
the
t
h
e
referred
r
e
f
e
r
r
e
d
document
d
o
c
u
m
e
n
t
shall
s
h
a
l
l
be
b
e
used
u
s
e
d
unless
u
n
l
e
s
s
otherwise
o
t
h
e
r
w
i
s
e
agreed.
a
g
r
e
e
d
.
Other
O
t
h
e
r
recognized
r
e
c
o
g
n
i
z
e
d
standards
s
t
a
n
d
a
r
d
s
may
m
a
y
be
b
e
used
u
s
e
d
provided
p
r
o
v
i
d
e
d
it
i
t
can
c
a
n
be
b
e
shown
s
h
o
w
n
that
t
h
a
t
they
t
h
e
y
meet
m
e
e
t
or
o
r
exceed
e
x
c
e
e
d
the
t
h
e
requirements
r
e
q
u
i
r
e
m
e
n
t
s
and
a
n
d
guidelines
g
u
i
d
e
l
i
n
e
s
of
o
f
the
t
h
e
standards
s
t
a
n
d
a
r
d
s
referenced
r
e
f
e
r
e
n
c
e
d
below.
b
e
l
o
w
.
Note
N
o
t
e
that
t
h
a
t
references
r
e
f
e
r
e
n
c
e
s
in
i
n
this
t
h
i
s
specification
s
p
e
c
i
f
i
c
a
t
i
o
n
(e.g.
(
e
.
g
.
references
r
e
f
e
r
e
n
c
e
s
to
t
o
clause
c
l
a
u
s
e
numbers
n
u
m
b
e
r
s
in
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n
standards)
s
t
a
n
d
a
r
d
s
)
are
a
r
e
based
b
a
s
e
d
on
o
n
year
y
e
a
r
of
o
f
issue
i
s
s
u
e
as
a
s
listed
l
i
s
t
e
d
below.
b
e
l
o
w
.
Table
T
a
b
l
e
1:
1
:
Standards
S
t
a
n
d
a
r
d
s
that
t
h
a
t
are
a
r
e
the
t
h
e
basis
b
a
s
i
s
for
f
o
r
transformer
t
r
a
n
s
f
o
r
m
e
r
specification
s
p
e
c
i
f
i
c
a
t
i
o
n
IEC
I
E
C
2011
2
0
1
1
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
1:
1
:
IEEE
I
E
E
E
2010
2
0
1
0
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Liquid-
L
i
q
u
i
d
-
60076-1
6
0
0
7
6
-
1
General
G
e
n
e
r
a
l
C57.12.00
C
5
7
.
1
2
.
0
0
Immersed
I
m
m
e
r
s
e
d
Distribution,
D
i
s
t
r
i
b
u
t
i
o
n
,
Power,
P
o
w
e
r
,
and
a
n
d
Regulating
R
e
g
u
l
a
t
i
n
g
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEEE
I
E
E
E
2010
2
0
1
0
C57.12.90
C
5
7
.
1
2
.
9
0
Test
T
e
s
t
Code
C
o
d
e
for
f
o
r
Liquid-Immersed
L
i
q
u
i
d
-
I
m
m
e
r
s
e
d
Distribution,
D
i
s
t
r
i
b
u
t
i
o
n
,
Power,
P
o
w
e
r
,
and
a
n
d
Regulating
R
e
g
u
l
a
t
i
n
g
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2011
2
0
1
1
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
2:
2
:
IEEE
I
E
E
E
2010
2
0
1
0
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Liquid-
L
i
q
u
i
d
-
60076-2
6
0
0
7
6
-
2
Temperature
T
e
m
p
e
r
a
t
u
r
e
rise
r
i
s
e
C57.12.00
C
5
7
.
1
2
.
0
0
Immersed
I
m
m
e
r
s
e
d
Distribution,
D
i
s
t
r
i
b
u
t
i
o
n
,
Power,
P
o
w
e
r
,
and
a
n
d
Regulating
R
e
g
u
l
a
t
i
n
g
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2013
2
0
1
3
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
3:
3
:
IEEE
I
E
E
E
2010
2
0
1
0
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Liquid-
L
i
q
u
i
d
-
60076-3
6
0
0
7
6
-
3
Insulation
I
n
s
u
l
a
t
i
o
n
levels,
l
e
v
e
l
s
,
dielectric
d
i
e
l
e
c
t
r
i
c
C57.12.00
C
5
7
.
1
2
.
0
0
Immersed
I
m
m
e
r
s
e
d
Distribution,
D
i
s
t
r
i
b
u
t
i
o
n
,
Power,
P
o
w
e
r
,
and
a
n
d
tests
t
e
s
t
s
and
a
n
d
external
e
x
t
e
r
n
a
l
clearances
c
l
e
a
r
a
n
c
e
s
Regulating
R
e
g
u
l
a
t
i
n
g
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
in
i
n
air
a
i
r
IEC
I
E
C
2006
2
0
0
6
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
5:
5
:
IEEE
I
E
E
E
2010
2
0
1
0
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Liquid-
L
i
q
u
i
d
-
60076-5
6
0
0
7
6
-
5
Ability
A
b
i
l
i
t
y
to
t
o
withstand
w
i
t
h
s
t
a
n
d
short
s
h
o
r
t
C57.12.00
C
5
7
.
1
2
.
0
0
Immersed
I
m
m
e
r
s
e
d
Distribution,
D
i
s
t
r
i
b
u
t
i
o
n
,
Power,
P
o
w
e
r
,
and
a
n
d
circuit
c
i
r
c
u
i
t
Regulating
R
e
g
u
l
a
t
i
n
g
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2005
2
0
0
5
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
7:
7
:
IEEE
I
E
E
E
2010
2
0
1
0
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Liquid-
L
i
q
u
i
d
-
60076-7
6
0
0
7
6
-
7
Loading
L
o
a
d
i
n
g
guide
g
u
i
d
e
for
f
o
r
oil-
o
i
l
-
C57.12.00
C
5
7
.
1
2
.
0
0
Immersed
I
m
m
e
r
s
e
d
Distribution,
D
i
s
t
r
i
b
u
t
i
o
n
,
Power,
P
o
w
e
r
,
and
a
n
d
immersed
i
m
m
e
r
s
e
d
power
p
o
w
e
r
Regulating
R
e
g
u
l
a
t
i
n
g
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
transformers
t
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2005
2
0
0
5
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
10:
1
0
:
IEEE
I
E
E
E
2010
2
0
1
0
Test
T
e
s
t
Code
C
o
d
e
for
f
o
r
Liquid-Immersed
L
i
q
u
i
d
-
I
m
m
e
r
s
e
d
60076-10
6
0
0
7
6
-
1
0
Determination
D
e
t
e
r
m
i
n
a
t
i
o
n
of
o
f
sound
s
o
u
n
d
C57.12.90
C
5
7
.
1
2
.
9
0
Distribution,
D
i
s
t
r
i
b
u
t
i
o
n
,
Power,
P
o
w
e
r
,
and
a
n
d
Regulating
R
e
g
u
l
a
t
i
n
g
levels
l
e
v
e
l
s
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Project
P
r
o
j
e
c
t
development,
d
e
v
e
l
o
p
m
e
n
t
,
Requirements,
R
e
q
u
i
r
e
m
e
n
t
s
,
TR3123,
T
R
3
1
2
3
,
Version
V
e
r
s
i
o
n
4.0
4
.
0
Page
P
a
g
e
9
9
of
o
f
11
1
1
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Requirements:
R
e
q
u
i
r
e
m
e
n
t
s
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
Classification:
C
l
a
s
s
i
f
i
c
a
t
i
o
n
:
Internal
I
n
t
e
r
n
a
l
IEEE
I
E
E
E
2011
2
0
1
1
C57.12.91
C
5
7
.
1
2
.
9
1
Test
T
e
s
t
Code
C
o
d
e
for
f
o
r
Dry-Type
D
r
y
-
T
y
p
e
Distribution
D
i
s
t
r
i
b
u
t
i
o
n
and
a
n
d
Power
P
o
w
e
r
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2004
2
0
0
4
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
11:
1
1
:
IEEE
I
E
E
E
2005
2
0
0
5
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Dry-Type
D
r
y
-
T
y
p
e
60076-11
6
0
0
7
6
-
1
1
Dry-type
D
r
y
-
t
y
p
e
transformers
t
r
a
n
s
f
o
r
m
e
r
s
C57.12.01
C
5
7
.
1
2
.
0
1
Distribution
D
i
s
t
r
i
b
u
t
i
o
n
and
a
n
d
Power
P
o
w
e
r
Transformers,
T
r
a
n
s
f
o
r
m
e
r
s
,
Including
I
n
c
l
u
d
i
n
g
Those
T
h
o
s
e
with
w
i
t
h
Solid-Cast
S
o
l
i
d
-
C
a
s
t
and/or
a
n
d
/
o
r
Resin
R
e
s
i
n
IEEE
I
E
E
E
2011
2
0
1
1
Encapsulated
E
n
c
a
p
s
u
l
a
t
e
d
Windings.
W
i
n
d
i
n
g
s
.
C57.12.91
C
5
7
.
1
2
.
9
1
Test
T
e
s
t
Code
C
o
d
e
for
f
o
r
Dry-Type
D
r
y
-
T
y
p
e
Distribution
D
i
s
t
r
i
b
u
t
i
o
n
and
a
n
d
Power
P
o
w
e
r
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2008
2
0
0
8
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
12:
1
2
:
IEEE
I
E
E
E
2005
2
0
0
5
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Dry-Type
D
r
y
-
T
y
p
e
60076-12
6
0
0
7
6
-
1
2
Loading
L
o
a
d
i
n
g
guide
g
u
i
d
e
for
f
o
r
dry-type
d
r
y
-
t
y
p
e
C57.12.01
C
5
7
.
1
2
.
0
1
Distribution
D
i
s
t
r
i
b
u
t
i
o
n
and
a
n
d
Power
P
o
w
e
r
power
p
o
w
e
r
transformers
t
r
a
n
s
f
o
r
m
e
r
s
Transformers,
T
r
a
n
s
f
o
r
m
e
r
s
,
Including
I
n
c
l
u
d
i
n
g
Those
T
h
o
s
e
with
w
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t
h
Solid-Cast
S
o
l
i
d
-
C
a
s
t
and/or
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n
d
/
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r
Resin
R
e
s
i
n
Encapsulated
E
n
c
a
p
s
u
l
a
t
e
d
Windings
W
i
n
d
i
n
g
s
IEC
I
E
C
60076-14
6
0
0
7
6
-
1
4
2013
2
0
1
3
Power
P
o
w
e
r
transformers,
t
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
14:
1
4
:
Design
D
e
s
i
g
n
and
a
n
d
application
a
p
p
l
i
c
a
t
i
o
n
of
o
f
liquid-immersed
l
i
q
u
i
d
-
i
m
m
e
r
s
e
d
power
p
o
w
e
r
transformers
t
r
a
n
s
f
o
r
m
e
r
s
using
u
s
i
n
g
high-
h
i
g
h
-
temperature
t
e
m
p
e
r
a
t
u
r
e
insulation
i
n
s
u
l
a
t
i
o
n
materials
m
a
t
e
r
i
a
l
s
IEEE
I
E
E
E
1276
1
2
7
6
2000
2
0
0
0
IEEE
I
E
E
E
Guide
G
u
i
d
e
for
f
o
r
the
t
h
e
application
a
p
p
l
i
c
a
t
i
o
n
of
o
f
High-Temperature
H
i
g
h
-
T
e
m
p
e
r
a
t
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r
e
Insulation
I
n
s
u
l
a
t
i
o
n
Materials
M
a
t
e
r
i
a
l
s
in
i
n
Liquid-Immersed
L
i
q
u
i
d
-
I
m
m
e
r
s
e
d
Power
P
o
w
e
r
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2003
2
0
0
3
Tap-changers,
T
a
p
-
c
h
a
n
g
e
r
s
,
Part
P
a
r
t
1:
1
:
IEEE
I
E
E
E
2012
2
0
1
2
Requirements
R
e
q
u
i
r
e
m
e
n
t
s
for
f
o
r
Load
L
o
a
d
Tap
T
a
p
60214-1
6
0
2
1
4
-
1
Performance
P
e
r
f
o
r
m
a
n
c
e
requirements
r
e
q
u
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r
e
m
e
n
t
s
C57.131
C
5
7
.
1
3
1
Changers
C
h
a
n
g
e
r
s
and
a
n
d
test
t
e
s
t
methods
m
e
t
h
o
d
s
IEC
I
E
C
2011
2
0
1
1
Converter
C
o
n
v
e
r
t
e
r
Transformers,
T
r
a
n
s
f
o
r
m
e
r
s
,
Part
P
a
r
t
IEEE
I
E
E
E
1998
1
9
9
8
Practices
P
r
a
c
t
i
c
e
s
and
a
n
d
Requirements
R
e
q
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t
s
for
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r
61378-1
6
1
3
7
8
-
1
1:
1
:
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
for
f
o
r
industrial
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n
d
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s
t
r
i
a
l
C57.18.10
C
5
7
.
1
8
.
1
0
Semiconductor
S
e
m
i
c
o
n
d
u
c
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Power
P
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R
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c
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f
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r
applications
a
p
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c
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t
i
o
n
s
Transformers
T
r
a
n
s
f
o
r
m
e
r
s
IEC
I
E
C
2008
2
0
0
8
Insulated
I
n
s
u
l
a
t
e
d
bushings
b
u
s
h
i
n
g
s
for
f
o
r
IEEE
I
E
E
E
2004
2
0
0
4
General
G
e
n
e
r
a
l
Requirements
R
e
q
u
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C57.19.00
C
5
7
.
1
9
.
0
0
Procedure
P
r
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d
u
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e
for
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Power
P
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A
p
p
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t
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s
1000
1
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s
h
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s
IEC
I
E
C
2012
2
0
1
2
Fluids
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l
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s
for
f
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electrotechnical
e
l
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c
t
r
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c
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IEEE
I
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E
2006
2
0
0
6
Guide
G
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A
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s
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C57.106
C
5
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0
6
Maintenance
M
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q
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3
1
2
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4.0
4
.
0
Page
P
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10
1
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11
1
1
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Requirements:
R
e
q
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m
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s
:
Transformers
T
r
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s
f
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s
Classification:
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a
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s
i
f
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c
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:
Internal
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r
n
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transformers
t
r
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s
f
o
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m
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r
s
and
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d
switchgear
s
w
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c
h
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E
C
2012
2
0
1
2
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s
t
r
u
m
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n
t
transformers
t
r
a
n
s
f
o
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s
–
–
IEEE
I
E
E
E
2008
2
0
0
8
Requirements
R
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q
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e
m
e
n
t
s
for
f
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Instrument
I
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s
t
r
u
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t
61869-2
6
1
8
6
9
-
2
Part
P
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t
2:
2
:
Additional
A
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C57.13
C
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3
Transformers
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s
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requirements
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current
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transformers
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s
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IEC
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C
60076-16
6
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6
-
1
6
2011
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1
Power
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transformers,
t
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Part
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16:
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6
:
Transformers
T
r
a
n
s
f
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m
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s
for
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wind
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t
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b
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e
applications
a
p
p
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i
c
a
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n
s
NA
N
A
NA
N
A
NA
N
A
Table
T
a
b
l
e
2:
2
:
Other
O
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technical
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c
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requirements
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m
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R
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4
2
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