Siemens 81000 90H35 User manual

1
'
SIEMENS
TM
Instructions
Installation
Operation
Maintenance
MVC
-
9028
Series
81000
5
-
7.2
kV
Medium
Voltage
Vacuum
Contactors
Type
90
H
35
(
5
kV
)
;
Type
90
H
37
(
7.2
kV
)
(
Distribution
Voltage
2400
-
6900
VAC
;
Utilization
Voltage
2300
-
6600
VAC
)
Courtesy of NationalSwitchgear.com

Courtesy of NationalSwitchgear.com

Table
of
Contents
Table
of
Contents
Main
Contacts
Wear
Check
Vacuum
Loss
Check
Vacuum
Bottle
Replacement
Removing
Vacuum
Bottle
Installing
the
Replacement
Vacuum
Interrupter
Main
Coil
Replacement
Auxiliary
Contact
Block
Replacement
Fuse
Clip
Inspection
Terminals
and
Joints
Recommended
Torque
Values
Periodic
Cleaning
Maintenance
after
a
Fault
General
Inspection
Enclosures
Terminals
and
Internal
Conductors
Overload
Relays
Fuse
Holders
Fuses
Troubleshooing
Troubleshooting
Chart
Parts
90
H
35
(
5
kV
)
Contactor
Part
Pictorials
90
H
37
(
7.2
kV
)
Contactor
Part
Pictorials
14
Description
General
Contactor
Ratings
Description
of
Operation
.
..
Blown
Fuse
Trip
Mechanism
.
.
..
Mechanically
Latched
Contactors
Nomenclature
Receiving
and
Handling
Receiving
Inspection
Handling
Storage
Installation
Site
Preparation
and
Mounting
..
Electrical
Connections
Altitude
Setting
Latched
Contactors
Operation
Pre
-
Energization
Check
Operating
Data
Typical
Control
Circuit
Diagrams
Typical
Control
Circuit
Diagrams
Typical
Control
Circuit
Diagrams
Maintenance
Safety
Phase
Barrier
and
Dust
Cover
Removal
and
Re
-
Installation
.
Blown
Fuse
Trip
Mechanism
14
1
15
1
15
2
16
2
17
3
18
3
18
18
4
18
4
18
5
19
6
19
6
19
7
19
7
19
19
8
19
8
9
20
10
11
22
23
12
24
25
12
12
NOTE
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
,
nor
to
provide
for
every
possible
contingency
to
be
met
in
connection
with
installation
,
operation
or
maintenance
.
Should
further
information
be
desired
or
should
particular
problems
arise
which
are
not
covered
sufficiently
for
the
purchaser
’
s
purposes
,
the
matter
should
be
referred
to
the
local
Siemens
sales
office
.
The
contents
of
this
instruction
manual
shall
not
become
part
of
or
modify
any
prior
or
existing
agreement
,
commitment
or
relationship
.
The
sales
contract
contains
the
entire
obligation
of
Siemens
.
The
warranty
contained
in
the
contract
between
the
parties
is
the
sole
warranty
of
Siemens
.
Any
statement
contained
herein
do
not
create
new
warranties
or
modify
the
existing
warranty
.
Courtesy of NationalSwitchgear.com

Description
Page
1
structure
which
provides
mounting
for
the
power
fuses
,
con
-
trol
transformer
and
primary
fuses
,
and
drawout
attachments
.
Due
to
the
fact
that
arc
interruption
is
accomplished
com
-
pletely
within
the
vacuum
bottles
,
items
such
as
arc
chutes
,
blowout
coils
and
pole
plates
are
not
required
with
vacuum
contactors
.
Stationary
and
movable
power
contacts
are
lo
-
cated
inside
the
vacuum
bottles
with
corrugated
stainless
steel
bellows
attached
to
the
movable
contacts
to
ensure
a
complete
seal
and
integrity
of
the
vacuum
bottle
.
Voltage
surge
suppressors
are
sometimes
furnished
at
the
controller
load
terminals
to
limit
transient
overvoltages
caused
by
multiple
reignitions
which
may
occur
due
to
the
use
of
vacuum
interrupters
.
For
application
guidelines
see
the
instruction
manual
for
Series
81000
Controllers
—
MVC
-
9018
.
General
Siemens
Type
90
H
3
vacuum
contactors
are
provided
for
use
in
Series
81000
medium
voltage
controllers
.
Type
90
H
3
contactors
provide
the
advantage
of
long
mechanical
and
electrical
life
with
low
maintenance
and
are
essentially
im
-
mune
to
adverse
atmospheric
environments
.
They
are
suitable
for
loads
of
all
types
,
including
three
-
phase
motors
,
transformers
,
capacitors
and
resistive
loads
.
The
overall
dimensions
of
the
vacuum
contactor
are
18
inches
(
457
mm
)
wide
by
27.5
inches
(
699
mm
)
high
by
23.87
inches
(
606
mm
)
deep
.
The
vacuum
contactor
with
single
or
double
barrel
power
fuses
can
be
installed
in
Series
81000
Class
E
2
controllers
of
either
one
-
,
two
-
or
three
-
high
construction
.
The
Type
90
H
3
vacuum
contactor
consists
of
:
(
1
)
a
low
voltage
section
which
contains
the
main
coil
drive
and
auxiliary
contacts
;
(
2
)
a
medium
voltage
section
which
houses
the
vacuum
interrupter
bottles
and
(
3
)
a
support
Contactor
Ratings
Interrupting
Capacity
kV
Enclosed
Continuous
Ampere
Rating
Maximum
Voltage
Rating
Impulse
Level
(
BIL
)
Contactor
Type
Fused
Class
E
2
Controller
(
MVA
)
Unfused
Contactor
(
kA
)
5
kV
@
2.3
-
4.6
kV
200
@
2.3
kV
350
@
4.0
kV
400
@
4.6
kV
60
90
H
35
5.0
kV
360
5
kA
@
6.6
kV
60
5
kA
@
6.6
kV
7.2
kV
90
H
37
310
Auxiliary
Contacts
:
Each
contactor
is
equipped
with
3
N
.
O
.
and
4
N
.
C
.
auxiliary
contacts
for
customer
use
.
These
contacts
are
rated
600
V
,
10
A
(
NEMA
Class
A
600
)
.
NOTE
:
On
drawout
contactors
,
2
N
.
O
.
and
2
N
.
C
.
contacts
are
available
for
customer
use
.
Transformer
Loads
3
Phase
Horsepower
Rating
at
Utilization
Voltage
Maximum
Motor
Fuse
Rating
2300
V
4000
-
4600
V
6600
V
Maximum
Transf
Fuse
Rating
Contactor
Type
Maximum
3
-
Phase
kVA
at
Distribution
Voltage
Syn
.
Motors
Syn
.
Motors
Syn
.
Motors
Ind
.
Ind
.
Ind
.
Motors
Motors
Motors
2400
V
4800
V
6900
V
4160
V
0.8
PF
1.0
PF
0.8
PF
1.0
PF
0.8
PF
1.0
PF
450
E
1500
2500 2500
90
H
35
24
R
1750
1500
2500
3000
2500
1500
200
E
18
R
1500
3500
4500
3500
90
H
37
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Description
Page
2
The
clearance
between
the
cup
(
3.3
)
and
the
nut
(
3.4
)
in
the
ON
switching
position
allows
the
magnetic
drive
to
accelerate
during
opening
operations
.
A
compression
spring
(
4.7
)
is
positioned
between
the
drive
lever
(
3.1
)
and
the
vacuum
interrupter
(
4.1
)
.
Description
of
Operation
(
Refer
to
Figure
1
.
)
The
drive
lever
(
3.1
)
forms
an
angle
,
with
point
A
as
the
fulcrum
.
When
the
magnet
is
not
energized
,
the
lever
is
held
in
the
OFF
position
by
the
compression
springs
(
9.3
)
.
Thus
point
B
of
the
drive
lever
is
in
its
extreme
left
position
.
At
this
point
the
drive
lever
engages
with
the
cup
(
3.3
)
and
the
nut
(
3.4
)
of
the
vacuum
interrupter
.
This
holds
the
contacts
apart
(
in
the
OFF
position
)
against
the
atmospheric
pressure
.
When
the
magnet
coil
(
8.1
)
is
energized
,
the
armature
(
3.6
)
and
with
it
the
drive
lever
(
3.1
)
are
attracted
towards
the
magnet
core
(
8.2
)
against
the
reaction
of
the
two
compression
springs
(
9.3
)
.
Point
B
of
the
drive
lever
therefore
moves
to
the
far
right
position
.
The
nut
(
3.4
)
of
the
vacuum
interrupter
(
4.1
)
is
thus
released
so
that
the
atmospheric
pressure
can
press
the
moving
contact
against
the
fixed
contact
.
The
drive
mechanism
is
constructed
so
that
the
nut
(
3.4
)
never
comes
into
contact
with
the
drive
lever
(
3.1
)
when
in
the
ON
position
.
This
ensures
that
the
ON
switching
position
is
always
reached
,
definitely
and
completely
.
Blown
Fuse
Trip
Mechanism
Contactors
can
be
supplied
with
an
anti
-
single
phase
trip
mechanism
which
offers
protection
from
single
phasing
due
to
a
blown
power
fuse
.
Fused
contactors
equipped
with
the
blown
fuse
trip
mechanism
are
pre
-
adjusted
at
the
factory
so
that
the
opening
of
one
or
more
power
fuses
results
in
de
-
energizing
the
contactor
,
thus
interrupting
current
to
the
load
.
When
a
power
fuse
blows
,
a
plunger
extends
from
the
load
end
of
the
fuse
which
rotates
the
spring
-
loaded
trip
bar
and
releases
a
pre
-
compressed
micro
-
switch
on
the
side
of
the
contactor
.
A
contact
on
the
micro
-
switch
opens
at
this
time
and
de
-
energizes
the
contactor
magnet
coil
.
Figure
1
.
Operating
Components
of
Vacuum
Contactor
Courtesy of NationalSwitchgear.com

Description
Page
3
energy
source
provides
reliable
trip
power
for
a
maximum
delay
of
5
minutes
after
loss
of
control
power
.
Special
trip
circuits
energized
from
remote
power
sources
can
be
provided
.
Standard
control
circuits
are
available
for
115
V
and
230
VAC
.
Refer
to
the
contactor
rating
table
for
latched
contactor
ratings
.
Refer
to
specific
drawings
supplied
with
the
equip
-
ment
for
details
on
connection
and
operation
.
Mechanically
Latched
Contactors
Mechanically
latched
contactors
are
available
which
consist
of
a
standard
90
H
3
contactor
with
the
addition
of
a
mechani
-
cally
latch
assembly
.
The
mechanical
latch
holds
the
arma
-
ture
of
the
contactor
closed
against
the
magnet
core
after
the
contactor
is
energized
(
closed
)
and
control
power
is
removed
.
A
pushbutton
on
the
high
voltage
compartment
door
,
when
manually
depressed
,
trips
the
contactor
by
releasing
the
mechanical
latch
.
Electrical
trip
with
an
internal
solenoid
is
optionally
available
from
the
normal
control
trans
-
former
source
or
from
a
stored
energy
(
capacitor
)
source
which
is
charged
from
the
normal
control
source
.
The
stored
Nomenclature
The
contactors
can
be
identified
through
the
nomenclature
description
shown
below
:
xxxxxxxxxxxx
I
J
CONTACTOR
CONTINUOUS
AMPERE
RATING
H
3
=
360
A
.
H
6
=
720
A
.
VARIABLE
(
IF
USED
)
L
=
LATCHED
CONTACTOR
S
=
SPEC
1
AL
CONTACTOR
.
SEE
DWG
.
A
=
DRAWOUT
CONTACTOR
F
=
FUSE
CARRIAGE
(
FOR
720
A
.
CONTROLLER
)
T
=
DRAWOUT
CONTACTOR
WITH
SINGLE
PHASE
TRIP
BAR
INSULATION
VOLTAGE
5
=
5
KV
7
=
7.2
KV
NUMBER
OF
POLES
3
=
3
POLES
CPT
CAPACITY
IN
KVA
0
=
NONE
1
=
.
75
KVA
2
=
1.5
KVA
3
=
2.0
KVA
4
=
2.5
KVA
5
=
3.0
KVA
6
=
3.25
KVA
7
=
OTHERS
INTERRUPTION
CAPACITY
1
=
5.0
KA
2
=
200
MVA
3
=
350
MVA
4
=
400
MVA
5
=
570
MVA
CPT
SECONDARY
OR
CONTROL
CIRCUIT
VOLTAGE
A
=
115
VAC
B
=
230
VAC
C
=
125
VDC
D
=
250
VDC
E
=
OTHERS
N
=
NONE
MAIN
FUSE
RATING
00
-
NONE
02
=
2
R
03
=
3
R
04
=
4
R
06
=
6
R
09
=
9
R
12
=
12
R
18
=
18
R
20
=
20
E
24
=
24
R
25
=
25
E
26
=
30
E
27
=
40
E
28
=
50
E
29
=
65
E
30
=
80
E
31
=
100
E
32
=
125
E
33
=
150
E
34
=
200
E
35
=
250
E
36
=
300
E
37
=
325
E
38
=
38
R
39
=
350
E
40
=
375
E
41
=
400
E
42
=
450
E
43
=
500
E
44
=
600
E
45
=
800
E
46
=
1
OOOE
57
=
57
X
99
=
MISC
.
CPT
PRIMARY
VOLTAGE
0
=
NONE
2
=
2300
V
.
60
HZ
3
=
3300
V
.
60
HZ
4
=
4000
V
.
60
HZ
5
=
4600
V
.
60
HZ
6
=
3300
V
.
60
HZ
7
=
6600
V
.
60
HZ
8
=
(
BELOW
20
E
)
9
=
OTHERS
(
MAX
.
7200
V
.
)
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Receiving
and
Handling
Page
4
Receiving
Inspection
An
immediate
inspection
should
be
made
for
any
damage
which
may
have
occurred
during
shipment
upon
receipt
of
this
equipment
.
The
inspection
should
include
examination
of
the
packaging
material
and
the
contactor
.
Be
sure
to
look
for
concealed
damage
and
do
not
discard
the
packaging
material
.
If
damage
is
found
,
note
damage
on
“
Bill
of
Lading
”
prior
to
accepting
receipt
of
the
shipment
,
if
possible
.
NOTE
The
way
visible
shipping
damage
is
treated
by
the
consignee
prior
to
signing
the
delivery
receipt
can
determine
the
outcome
of
the
damage
claim
to
be
filed
.
Notification
to
the
carrier
within
the
15
day
limit
on
concealed
damage
is
essential
if
loss
resulting
from
unsettled
claims
is
to
be
eliminated
or
mini
-
mized
.
A
claim
should
be
immediately
filed
with
the
carrier
,
and
the
Siemens
sales
office
should
be
notified
if
damage
or
loss
is
discovered
.
A
description
of
the
damage
and
as
much
identification
information
as
possible
should
accompany
the
claim
.
Handling
For
convenience
and
safety
in
lifting
or
moving
the
contactor
,
the
lifting
device
similar
to
that
shown
in
Figure
2
should
be
purchased
.
Figure
2
.
Lifting
Device
A
crane
or
hoist
is
also
recommended
to
handle
the
contactor
,
if
the
lifting
device
is
not
available
.
Refer
to
Figure
3
for
recommended
lifting
method
.
A
forklift
truck
can
also
be
utilized
:
Observe
the
following
precautions
prior
to
moving
the
con
-
tactor
with
a
crane
or
hoist
:
1
.
Keep
the
contactor
in
an
upright
position
only
.
2
.
Select
rigging
lengths
to
compensate
for
any
unequal
weight
distribution
.
3
.
Do
not
allow
the
angle
between
the
lifting
cables
and
vertical
to
exceed
45
degrees
.
4
.
Never
lift
a
contactor
above
an
area
where
personnel
are
located
.
NOTE
The
lifting
device
is
not
intended
to
be
used
as
a
means
of
transporting
the
contactor
in
the
raised
position
.
The
contactor
should
be
transported
with
the
lifting
device
in
its
lowered
position
.
Courtesy of NationalSwitchgear.com

Receiving
and
Handling
Page
5
if
a
forklift
is
utilized
,
the
following
precautions
should
be
taken
when
moving
contactors
:
1
.
Keep
the
contactor
in
an
upright
position
only
.
2
.
Make
sure
the
load
is
properly
balanced
on
the
forks
.
3
.
Place
protective
material
between
the
contactor
and
the
forklift
to
prevent
bending
or
scratching
.
4
.
Securely
strap
the
contactor
to
the
forklift
to
prevent
shift
-
ing
or
tipping
.
5
.
Excessive
speeds
and
sudden
starts
,
stops
,
and
turns
must
be
avoided
when
handling
the
contactor
.
6
.
Lift
the
contactor
only
high
enough
to
clear
obstructions
on
the
floor
.
7
.
Take
care
to
avoid
collisions
with
structures
,
other
equip
-
ment
,
or
personnel
when
moving
the
contactor
.
8
.
Never
lift
a
contactor
above
an
area
where
personnel
are
located
.
Storage
The
contactor
must
be
stored
in
a
clean
,
dry
,
dust
and
condensation
free
environment
if
it
cannot
be
placed
into
service
reasonably
soon
after
receipt
.
Do
not
store
equipment
outdoors
.
A
standard
150
watt
light
bulb
,
connected
to
burn
continuously
should
be
placed
within
the
contactor
to
prevent
condensation
.
Figure
3
.
Recommended
Lifting
Method
Courtesy of NationalSwitchgear.com

Installation
Page
6
AWARNING
Electrical
Connections
Inspect
all
insulated
wiring
to
see
that
no
damage
has
resulted
from
installing
the
contactor
.
Test
the
high
voltage
wiring
for
possible
grounds
or
short
circuits
.
A
dielectric
test
at
2.25
times
the
nominal
system
voltage
plus
2000
volts
applied
for
one
minute
between
phases
and
from
ail
phases
to
ground
is
the
preferred
method
.
Be
sure
to
disconnect
any
devices
(
control
power
transformer
,
etc
.
)
from
the
circuit
which
could
be
damaged
by
the
test
voltage
.
If
a
hi
-
pot
tester
is
not
available
,
then
a
Megger
test
at
1000
volts
is
a
suitable
second
choice
.
Accidental
contact
with
energized
wiring
or
bus
system
can
cause
electric
shock
,
burn
or
electrocution
.
Disconnect
and
lock
-
out
incoming
power
and
control
voltage
sources
before
begin
-
ning
work
on
this
or
any
other
electrical
equipment
.
h
Check
all
control
circuit
terminals
with
a
voltmeter
to
make
certain
that
the
equip
-
ment
is
totally
deenergized
.
Use
only
ap
-
proved
high
voltage
test
equipment
to
check
voltage
on
power
terminals
.
Do
not
attempt
to
measure
high
voltage
with
a
volt
-
ohm
meter
.
AWARNING
Excessive
dielectric
test
voltages
can
cause
harmful
x
-
radiation
to
be
emitted
from
vacuum
bottles
.
It
is
recommended
that
a
safety
ground
be
connected
to
the
power
bus
after
the
sys
-
tem
has
been
deenergized
,
and
prior
to
working
on
the
equipment
.
Follow
the
pro
-
cedure
outlined
in
the
pre
-
energization
check
section
of
this
manual
before
power
is
restored
.
h
Vacuum
-
type
interrupters
can
produce
x
-
rays
if
they
are
subjected
to
sufficiently
high
voltages
.
The
vacuum
bottles
used
in
Siemens
type
90
H
3
contactors
will
not
produce
harmful
x
-
rays
at
applied
vol
-
tages
of
40
kV
or
less
.
High
-
potential
dielectric
tests
should
be
limited
to
a
max
-
imum
value
of
13
,
250
volts
RMS
AC
to
allow
an
adequate
safety
margin
for
protection
of
personnel
from
x
-
radiation
.
Site
Preparation
and
Mounting
Installation
shall
be
in
accordance
with
the
National
Electrical
Code
,
ANSI
,
and
NFPA
70
Standards
.
The
contactor
should
be
installed
in
a
clean
dry
heated
place
with
good
ventilation
.
It
should
be
readily
accessible
for
cleaning
and
inspection
and
should
be
carefully
set
up
and
leveled
on
its
supporting
foundation
and
secured
in
place
.
All
adjustments
have
been
made
at
the
factory
before
ship
-
ping
and
generally
no
change
is
required
.
See
that
ail
contact
surfaces
are
clean
and
smooth
,
and
that
current
-
carrying
parts
are
not
damaged
.
AWARNING
High
peak
voltages
can
result
in
er
-
roneous
test
results
and
x
-
radiation
emitted
from
vacuum
bottles
causing
personal
injury
.
h
Do
not
exceed
the
recommended
test
voltages
when
performing
dielectric
tests
.
AWARNING
Accidental
contact
with
dielectric
or
megger
test
equipment
can
cause
shock
,
burn
or
electrocution
.
DC
high
potential
test
voltage
sources
using
half
wave
conversion
will
apply
peak
voltages
3
times
greater
than
the
measured
DC
voltage
.
Do
not
use
DC
high
potential
voltage
sources
which
employ
half
wave
conversion
circuits
.
Dielectric
or
megger
testing
should
only
be
conducted
by
qualified
personnel
.
Refer
to
test
device
instructions
for
safety
instructions
.
Courtesy of NationalSwitchgear.com

Installation
Page
7
Make
sure
that
all
current
-
carrying
parts
outside
the
contactor
have
adequate
current
-
carrying
capacity
and
are
correctly
insulated
in
accordance
with
the
requirements
of
the
National
Electrical
Code
(
NEC
)
.
All
electrical
connections
should
be
made
carefully
per
the
wiring
diagram
furnished
with
the
equipment
.
Tighten
all
lugs
to
recommended
torque
values
.
Use
recommended
crimping
tools
only
if
crimp
lugs
are
supplied
.
Adjusting
the
Electromanetic
Drive
+
®
Max
.
7
mm
4100
ft
.
Above
S
.
L
.
to
8200
ft
.
Above
S
.
L
.
650
ft
.
Below
S
.
L
.
to
4100
ft
.
Above
S
.
L
.
Altitude
Setting
4100
ft
.
Below
S
.
L
.
to
650
ft
.
Above
S
.
L
.
Vacuum
contactors
are
sensitive
,
to
a
certain
degree
,
to
the
altitude
at
the
installation
site
.
This
is
due
to
the
fact
that
atmospheric
pressure
assists
in
closing
the
main
contacts
by
exerting
force
on
the
bellows
at
the
moveable
end
of
the
vacuum
bottles
.
Since
this
force
is
proportional
to
the
dif
-
ference
between
internal
bottle
pressure
and
external
atmos
-
pheric
pressure
,
the
contactor
’
s
main
return
springs
must
be
adjusted
slightly
when
the
contact
is
to
be
located
at
extreme
distances
above
or
below
sea
level
.
After
suitable
adjustment
,
the
90
H
3
vacuum
contactors
can
be
operated
at
the
following
site
altitudes
:
From
4100
ft
.
below
S
.
L
.
to
650
ft
.
above
S
.
L
.
From
650
ft
.
below
S
.
L
.
to
4100
ft
.
above
S
.
L
.
From
4100
ft
.
above
S
.
L
.
to
8200
ft
.
above
S
.
L
.
The
vacuum
contactors
are
set
at
the
factory
for
a
site
altitude
from
650
ft
.
below
sea
level
to
4100
ft
.
above
sea
level
.
Figure
5
.
Altitude
Adjustment
Information
Plate
Adjustment
on
the
bottom
of
the
vacuum
contactor
is
neces
-
sary
if
the
site
altitude
is
different
from
that
set
at
the
factory
.
See
Figure
4
.
•
Press
in
both
setting
plugs
(
9.2
)
using
a
screwdriver
.
•
Adjust
each
setting
plug
to
the
site
altitude
accord
-
ing
to
the
instruction
plate
.
See
Figure
5
.
Latched
Contactors
(
Refer
to
Figure
6
)
The
trip
rod
on
the
latched
contactor
is
locked
in
the
shipping
position
by
a
wire
tie
as
shown
below
.
Remove
this
ty
-
rap
before
placing
contactor
in
operation
allowing
the
trip
rod
to
extend
fully
.
All
latched
contactors
are
shipped
with
a
threaded
stud
extending
3.62
inches
(
92
mm
)
from
the
end
of
the
trip
rod
.
If
the
contactor
is
to
be
used
in
the
bottom
compartment
of
the
controller
cubicle
,
this
stud
should
be
left
in
place
.
If
the
contactor
will
be
used
in
the
middle
or
top
compartments
,
the
stud
and
associated
nut
and
lockwasher
must
be
removed
.
3.62
"
(
92
mm
)
Trip
Rod
i
la
(
t
T
I
'
o
Bolt
/
/
Nut
/
O
Lockwasher
r
Wire
Tie
(
Remove
Prior
to
Installation
)
Figure
4
.
Altitude
Adjustment
Figure
6
.
Latched
Contactor
Courtesy of NationalSwitchgear.com