Transcript
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Instructions for Type SVS Indoor or Outdoor Autovalve®Lightning Arresters for Service from 0-10,000 Feet
GENERAL
different
arresters used for overvoltage protection power
apparatus such as oil insulated
transformers and circuit breakers.
240 KV.
a possible
arrester unit and a difference in mounting leaflet are not interchangeable with other station
arresters.
In
all cases
an arrester rating,
before
consult the
nearest Westinghouse district office.
as
of
this
series can
be
a single, unbraced structure.
The arrester ratings up to 1 32 KV are of unit
Those
construction.
an
ratings
casting identifies and gives the rating of that
arrester
arrester pole.
rated
unit only, not the complete Necessary mounting hard
ware is in a bag in the shipping crate.
tM
arrester
single
of
The unit nameplate attached to the base
The distinguishing feature of the SVS series is its short compact design. All erected
Because
dimensions, the SVS units described in this
changing
The SVS arresters are rated from 36 to
rating.
difference in voltage distribution over the
ua ls
The SVS Autovalve lightning arresters as described in the following pages are station of
I.L. 38-121-2
Nameplate and Ground Terminal Brackets
These the
ar
from 132 KV to 240 KV are combination of two units.
angle brackets are mounted under
bottom
of
the
arrester
pole.
A special feature of the SVS arrester is the pressure relief scheme which functions
DESCRIPTION
arrester consists
porcelain ments. in
of
one
or
more
clad units and required attach
These units may be used singly or
multiples
up
to
a
maximum arrester
tri
Each
ca
lP
to vent the arrester if an internal failure occurs.
rating of 240 KV as shown in Figure 1.
lec
Ratings The
master
nameplate
gives
the voltage
rating of the arrester. This is the maximum
.E
sixty cycle rms voltage that may be applied across the arrester between the line and
ground terminals.
If this rating is exceeded
the arrester is likely to remain conducting
after discharging a surge and will be dam
aged.
w
Changing Ratings The arrester voltage rating may be changed
ww
in the field by:
ing
the
(1) increasing or decreas
number
of
units
in
a
pole
and
(2) changing arrester units with those of a Effective November, 1969
Supersedes I.L. 38-120-40,
August, 1968
120 Kv SVS Autov alv e Arrest er Unit
One
bracket mounts the ground terminal and the
INSTALLATION
other the master nameplate.
.c om
2
To give the highest degree of protection the arresters should be located near the ap
Master Nameplate
paratus to be protected, using leads of the shortest possible length.
for all arresters with metal end castings,
pole should be connected to a low resistance
but not with the porcelain top arresters, where it is permanently mounted on the
apparatus.
The master nameplate iden
tifies by style number the arrester pole, voltage rating, location of individual units and the position of the grading ring.
A with
preferably
suitable
should See
be provided. surface
Figure
Used with arresters rated 144 to 240 KV as shown in Figure 1.
dimensions.
Non-Standard Arrester Parts
a
in
It is important that
for
arresters
be
flat.
1 for clearance and arrester
Line connections should be made in such manner that
tM
Insulating base - for use with discharge
counter.
as the
accordance
no
excessive
mechanical
strain is placed on the arrester.
(Furnished if requested) 1.
foundation
one
the outline drawing for the arrester
mounting
Grading Ring Assembly
the same
an
base casting.
ground,
Each arrester
ua ls
A separate master nameplate is provided
The safe
cantilever strength of the SVS arrester is 20,000 ft lbs and should not be exceeded by
ar
any combination of forces such as conductor side pull, wind or earthquake loading.
RECEIVING, HANDLING, STORING
lP
Insulating Base
Each unit is shipped in a wooden crate, and must be
kept
upright at all times.
The
packing slip is located on one of the crate Unpack carefully and examine for or
other
the porcelain.
ca
sides.
breakage
damage, especially to
If damage exists, save the
tri
container and packing material and notify the carrier. Shortages should be checked
with the carrier, or if not the fault of the carrier, with our nearest sales office. If parts do not agree with the packing list, the nearest Westinghouse repre
lec
contact
sentative, giving him the necessary infor mation.
The chart indicates the number of
parts to look for when unpacking any one
.E
arrester of a given rating.
Parts Required
Rating
36 to
120 KV Inclusive
144 to
ww
it is installed first, and the ar If installed and not
used
with recording or measuring equip
ment
a cable shunt is supplied to bypass
the unit. The bottom arrester unit is bolted di rectly to the foundation or the insulating base. At the same time insert the ground terminal and nameplate brackets between the foundation (or insulating base) and bottom
end casting of the arrester unit.
For multi-unit poles, once the bottom unit is firmly anchored, install the remaining unit as indicated on the master nameplate and in the outline drawing.
When all units
are bolted in place, add the line terminal and cover assembly to the top unit.
and cover assembly, one set of ground
grading ring is required, add the ring first
terminal and nameplate brackets
If a
and then the terminal and cover assembly.
Two arrester units, one line terminal
and cover assembly, one set of ground terminal and nameplate brackets
2 40 KV Inclusive
used,
resters bolted to it.
One arrester unit, one I ine terminal
w
132 KV
If
INSTALLATION PRECAUTIONS
Two arrester units, one line terminal
and cover assembly, one set of ground terminal and nameplate brackets and
grading ring
Arrester exhaust
ports should be di
rected away from the transformer and other arrester poles.
.c om 3
The line terminal assembly must not be used to lift the arrester.
When installing arrester, all mounting feet must be flush before tightening bolts. Shim if necessary.
Terminals arrester pole units should not be
climbed
for maintenance or any other
All
purpose.
aluminum.
\
alternate positions of line terminal compatible with copper or aluminum conductor .255 to .681 diameter
mounting holes for .625 bolts
_[1 \ r
�Q I
20 ch� H� + in
� �)'
-
0-
an
14.125
14
terminals are suitable for copper or
-D-j
*arrester should be mounted with the exhaust ports directed away from the
ar
transformers and other arrester poles
Kv
STYLE ' COMPLETE
RAT lNG
ARRESTER
60 71 90 96
631AO I 9AO I
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ca
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f-19 625 --jT
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=
01mens1ons 1n Inches (Approxrmate) See Note X
=
=
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=
.:::
=
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� � =
"'�
z �
c
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c
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c
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= �-
=
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34
NR
13
35
41
NR
26
38
631A011AO I
41
NR
30
42
6311012AOI
53
NR
35
47
6321648AOI
67
NR
41
52
632A023AO I
67
43 47
54
631A01010 I
6311014AO I
67
NR NR
110
631A01510I
67
NR
51
63
132
632A437AOI
90
NR
56
67
144
632A438AOI
I02
20
65
90 98 114
.E
I 08
168
631A439AOI
I 04
20
73
180
631A440AOI
I04
10
192
6321468AO I
116
25
77 95
631A511AOI
130
15
Ill
w
ww
� .125 � _1_
240 Kv
132 Kv
lec
48
�
tri
36-120Kv
alternate positions of ground terminal ( with nameplate opposite) compatible with copper 2.2 or aluminum conductor r .204 to .530 diameter
lP
��
�
insulating base unitS# 366C421G01-when used increase dimension '�A" by 14 inches.
tM
minimum distance between arrester phase legs.
36
ua ls
The
240
Note X:
Increased clearances are re�u1red over 6000 feet. Add 3% to drmensrons (C) and (0) for each 1000 feet above 6000 feet
Fig.
Out line Dimensions for 36-240 Kv SVS Lightning Arrester
59
128 134
.c om
4
Line Terminal Cable Size:
100 milliamps and the current should not
#2 to 350 MCM copper
flow for more than 5 seconds. The voltage should be run up to sparkover quickly so as
#4 to 350 MCM aluminum
not to overheat the gap grading resistors.
#4 to 300 MCM ACSR
The series gaps are shunted by a high a diameter of .255 to .681 inches.
resistance, giving a current flow of 0. 5 to 1. 0
ua ls
The terminal will accept conductors with
milliamperes
grading
energized at rated voltage. Ground Terminal
when
measure grading current or watts-loss will give readings
Cable Size:
current
Tests made to
insulators.
#4 to 4/0 MCM aluminum
infinite resistance.
A megger test will not show
an
#6 to 3/0 MCM ACSR
are high compared to
that
#4 to 200 MCM copper
It may be found that Doble or megger The terminal will accept conductors with a diameter of .204 to .530 inches.
tests on units of the same rating will give If one unit shows con
different readings.
siderable deviation from the rest, its con Testing A ll arrester units are tested at the factory. Each
element is surge tested, the
valve
to
make
periodic
readings
tested to insure it is tightly sealed against
and
note
the
Contamination on
trends of the readings.
the porcelain surface may cause faulty or
ar
complete arrester unit is tested for 60 cycle sparkover, radio influence and pressure
tM
dition should be questioned and the nearest sales office contacted. It is more significant
misleading readings.
Units should be tested
clean and dry.
Units should not be opened in
moisture.
MAINTENANCE
leading to the possibility of moisture en trance and consequent deterioration of the arresters. No simple field tests will check
tenance other than occasional inspection.
ca
lP
the field as to do so, would break the seal,
The SVS arrester requires no regular main
In locations where the porcelain becomes contaminated by dirt, soot, salt, etc., it is
ratory equipment.
recommended that the arresters be cleaned periodically.
If
an
tri
the complete characteristics of an arrester unit, since this requires considerable labo
arrester is suspected of having CAUTION
only
lec
been damaged in service, the only field tests that should be attempted are 60 cycle sparkover, Doble, or megger tests, then on clean dry arresters.
IT
IS NOT RECOMMENDED THAT
ARRESTERS CONSISTING OF MORE
It must be
THAN
understood that such tests will not deter mine the condition of the valve elements.
TWO
UNITS
BE
WASHED
WHILE THEY ARE ENERGIZED.
For more information refer to NEMA Bul
.E
letin #70; Guide for Field Testing of Light CORRESPONDENCE
ning Arresters.
If 60 cycle sparkover tests are made, the
circuit should
limiting
maximum
a
Direct any inquires pertaining to the light
means for
ning arrester to the nearest Westinghouse
current
sales office giving all information stated on
possible
the arrester (after sparkover) to
w
through
the
provide
the master nameplate.
ww
Westinghouse Electric Corporation
Distribution Apparatus Division, Bloomington, Indiana 47401
Printed io U.S.A.
.c om
Instructions for Type SVS Indoor or Outdoor Autovalve®Lightning Arresters for Service from 0-10,000 Feet
different rating.
The SVS Autovalve lightning arresters as described in the following pages are station arresters used for overvoltage protection power
apparatus such as oil insulated
transformers and circuit breakers.
240 KV.
arrester unit and a difference in mounting leaflet are not interchangeable with other station
arresters. an
In
arrester
all
cases
rating,
before
consult the
nearest Westinghouse district office.
distinguishing is
arrester
feature
of the SVS
its short compact design. ratings
of
All
this series can
be
single
unit
Those
construction.
casting identifies and gives the rating of that
arrester
rated
unit only, not the complete
arrester pole.
Necessary mounting hard
ware is in a bag in the shipping crate.
tM
erected as a single, unbraced structure. The arrester ratings up to 132 KV are of
an
The unit nameplate attached to the base
The series
of a possible
dimensions, the SVS units described in this
changing
The SVS arresters are rated from 36 to
Because
difference in voltage distribution over the
ua ls
GENERAL
of
I.L 38-121-2
Nameplate and Ground Terminal Brackets These the
ar
from 132 KV to 240 KV are combination of two units.
angle
bottom
brackets are mounted under of
the
arrester
pole.
A special feature of the SVS arrester is the pressure relief scheme which functions
lP
to vent the arrester if an internal failure
DESCRIPTION Each arrester porcelain
consists
of
one
or
more
clad units and required attach
These units may be used singly or
multiples
up
to
a
maximum arrester
tri
ments. in
ca
occurs.
rating of 240 KV as shown in Figure 1.
lec
Ratings The
master
nameplate
gives
the voltage
rating of the arrester. This is the maximum sixty cycle rms voltage that may be applied the arrester between the line and
.E
across
ground terminals.
If this rating is exceeded
the arrester is likely to remain conducting
after discharging a surge and will be dam
aged.
w
Changing Ratings The arrester voltage rating may be changed
ww
in the field by:
ing
the
(1) increasing or decreas
number
of
units
in a
pole
and
(2) changing arrester units with those of a Effective November, 1969
Supersedes l.L. 38-120-40,
August, 1968
120 Kv SVS Aut ov alv e Arr ester Unit
One
bracket mounts the ground terminal and the
INSTALLATION
other the master nameplate.
.c om
2
To give the highest degree of protection the arresters should be located near the ap
Master Nameplate
paratus to be protected, using leads of the shortest
for all arresters with metal end castings,
pole should be connected to a low resistance
not
with the porcelain top arresters,
where it
is
permanently
mounted on the
base casting. The master nameplate iden tifies by style number the arrester pole, voltage rating, location of individual units and the position of the grading ring.
ground,
A
suitable
should See
Used with arresters rated 144 to 240 KV as
Each arrester
the
same
foundation
one
in
as the
accordance
the outline drawing for the arrester be provided.
mounting
Grading Ring Assembly
surface
It is important that
for
Figure
arresters
be
flat.
1 for clearance and arrester
dimensions.
shown in Figure 1.
Line connections should be made in such manner that
tM
a
Non-Standard Arrester Parts
no
excessive
mechanical
strain is placed on the arrester.
(Furnished if requested) 1.
preferably
apparatus.
with
length.
an
but
possible
ua ls
A separate master nameplate is provided
Insulating base - for use with discharge
counter.
The safe
cantilever strength of the SVS arrester is 20,000 ft lbs and should not be exceeded by
ar
any combination of forces such as conductor side pull, wind or earthquake loading.
RECEIVING, HANDLING, STORING
lP
Insulating Base
Each unit is shipped in a wooden crate, and must
be
kept
upright at all times.
The
packing slip is located on one of the crate Unpack carefully and examine for or
other
the porcelain.
ca
sides.
breakage
damage, especially to
If damage exists, save the
tri
container and packing material and notify the carrier. Shortages should be checked with the carrier, or if not the fault of the carrier, with our nearest sales office. If parts do not agree with the packing list,
If
used,
resters
it is installed first, and the ar bolted to it.
If installed and not
used
with recording or measuring equip
ment
a cable shunt is supplied to bypass
the unit. The bottom arrester unit is bolted di rectly to the foundation or the insulating base. At the same time insert the ground
sentative, giving him the necessary infor mation. The chart indicates the number of
For multi-unit poles, once the bottom unit
contact
the
lec
Westinghouse repre
terminal and nameplate brackets between the foundation (or insulating base) and
nearest
parts to look for when unpacking any one
.E
arrester of a given rating.
Parts Required
Rating
36 to
120 KV Inclusive
ww
144 to
casting
of the arrester unit.
firmly anchored, install the remaining
unit as indicated on the master nameplate and in the outline drawing.
When all units
are bolted in place, add the line terminal If a
One arrester unit, one line terminal
and cover assembly to the top unit.
grading ring is required, add the ring first
terminal and nameplate brackets
and then the terminal and cover assembly.
Two arrester units, one line terminal
and cover assembly, one set of ground terminal and nameplate brackets
2 40 KV Inclusive
is
end
and cover assembly, one set of ground
w
132 KV
bottom
INSTALLATION PRECAUTIONS
Two arrester units, one line terminal
and cover assembly, one set of ground terminal and nameplate brackets and grading ring
Arrester
exhaust
ports should be di
rected away from the transformer and other arrester poles.
.c om 3
The line terminal assembly must not be
When installing arrester, all mounting feet must be flush before tightening bolts.
used to lift the arrester.
Shim if necessary. Terminals
arrester pole units should not be All
for maintenance or any other
aluminum.
\
mounting holes for
alternate positions of line terminal compatible with copper or aluminum conductor to diameter
.625 bolts
.255
20inchrw " �!'='i A \4) �o-+-o--, 14.125 l
�
• r-
.681
.
,', �)
. &)
t-c--.:
alternate positions of ground terminal (with nameplate opposite) compatible with copper or aluminum conductor to diameter
�
.204
36-120Kv
Kv
COMPLETE ARRESTER
90
ca
�
;;;:
= = � �
� = = = �
= � = � = � �
�
=
=
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=
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=
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=
=
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IDB
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632AO I 910I
34
NR
23
35
632102010 I
41
NR
26
38
�
""� �
�
""� = � =
�
632A021 10I
41
NR
30
42
53
NR
35
47
632164810I
67
NR
41
52
632AD231DI
67
NR
43
54
67
NR
47
59
NR
52
63
56 65
67
98 114
6321024AD I
67
6321437ADI
90
NR
632A43BADI
ID2
2D
168
6321439ADI
ID4
2D
73
IBD
632A44DADI
ID4
2D
632146BIDI
116
25
77 95
6321521ADI
I3D
25
Ill
w
Note X:
� � � "-
632A021101
6321D251D I
24D
=
-
�
132
192
�
=
� � �
�
"-
=
12D
144
ww
01 mens 1 ons In Inches
(ApproXImate) See Note X
=
.E
96
=
� = = = �
lec
72
�
tri
•
�I
.530
� .125 2.2� __j__ 'f--19.625 --jT
240 Kv
132 Kv
RAT lNG
60
lP
��
48
insulating base unitS# 366C421G01-when used increase dimension "A" by 14 inches.
ar
'arrester should be mounted with the exhaust ports directed away from the transformers and other arrester poles
STYLE
_______ _ _ _____J
�� �
tM
minimum distance between arrester phase legs.
36
terminals are suitable for copper or
ua ls
climbed purpose.
an
The
Increased c learances are requr red over 6DDD feet. ldd 3% to dimensrons (C) and (D) for each IDDD feet above 6DDD teet.
Fig.
1
Out I ine Dimensions for 36-240 Kv SVS Lightning Arrester
9D
128 134
.c om
4
Line Terminal
100 milliamps and the current should not flow for more than 5 seconds. The voltage
Cable Size:
#2 to 350 MCM copper
should be run up to sparkover quickly so as
#4 to 350 MCM aluminum
not to overheat the gap grading resistors.
#4 to 300 MCM ACSR
The series gaps are shunted by a high a diameter of . 255 to .681 inches.
resistance, giving a current flow of 0. 5 to 1. 0
ua ls
The terminal will accept conductors with
grading
current when
energized at rated voltage.
milliamperes
Tests made to
Ground Terminal
measure grading current or watts-loss will
Cable Size:
#4 to 200 MCM copper
insulators.
#4 to 4/0 MCM aluminum
infinite resistance.
give readings that
an
#6 to 3/0 MCM ACSR
are high compared to
A megger test will not show
It may be found that Doble or megger The terminal will accept conductors with a diameter of .204 to .530 inches.
tests on units of the same rating will give If one unit shows con
different readings.
Testing
tM
siderable deviation from the rest, its con dition should be questioned and the nearest sales office contacted. It is more significant
A ll arrester units are tested at the factory. Each valve
element is
surge tested, the
radio influence
and
pressure
tested to insure it is tightly sealed against
periodic
readings
and
note the
Contamination on
the porcelain surface may cause faulty or misleading readings.
Units should be tested
clean and dry.
Units should not be opened in
lP
moisture.
make
trends of the readings.
ar
complete arrester unit is tested for 60 cycle sparkover,
to
the field as to do so, would break the seal,
MAINTENANCE
leading to the possibility of moisture en
trance and consequent deterioration of the
The SVS arrester requires no regular main
arresters.
tenance other than occasional inspection.
ca
No simple field tests will check
In locations where the porcelain becomes
unit, since this requires considerable labo
contaminated by dirt, soot, salt, etc., it is
ratory equipment.
recommended that the arresters be cleaned periodically.
If been
an
tri
the complete characteristics of an arrester
arrester is suspected of having
damaged
in
service,
the
only field
CAUTION IT
only
It must be
ARRESTERS CONSISTING O F MORE
understood that such tests will not deter
THAN TWO UNITS BE WASHED WHILE THEY ARE ENERGIZED.
lec
tests that should be attempted are 60 cycle sparkover, Doble, or megger tests, then on clean dry arresters.
mine the condition of the valve elements.
IS NOT RECOMMENDED THAT
For more information refer to NEMA Bul
.E
letin #70; Guide for Field Testing of Light CORRESPONDENCE
ning Arresters.
If 60 cycle sparkover tests are made, the
circuit should
limiting
maximum
ning arrester to the nearest Westinghouse
possible current
sales office giving all information stated on
ww
a
means
the arrester (after sparkover) to
w
through
the
Direct any inquires pertaining to the light
for
provide
the master nameplate.
Westinghouse Electric Corporation
Distribution Apparatus Division, Bloomington, Indiana 47401
Printed in U.S.A.
