Siemens 5-GMI-250 - Page 44

Appendix
Page
41
Table
A
-
1
.
Type
GMI
Circuit
Breaker
Ratings
Rated
Required
Capabilities
®
Identification
Rated Values
Nominal
Voltage
Class
Nominal
3
-
Phase
Voltage
Insulation Level
Current
Current
Values
Rated Rated
Voltage
Range
Factor
Rated Withstand
Test
Voltage
Rated
Cont
.
Current
Rated
Short
Circuit
Current
(
at
rated
Max
.
kV
)
Rated
Inter
-
rupting
Time
Rated Rated
3
-
Sec
.
Short
Time
Current
Carrying
Capability
Closing
Max
.
MVA
Max
.
Permla
-
Sym
.
Inter
-
rupting
Capability
Max
.
and
Class
si
Me
Voltage
Voltage
Divided
Latching
Capability
(
Momen
-
tary
©
)
®
Trip
-
®
ping by
K
0
delay
2.7
K
Times
Rated
Short
Circuit
Current
K
Times Rated
Short
-
Circuit
Current
1.5
K
Times
Rated
Short
Circuit
Current
®
Low
Im
-
© ©
Y
Fre
-
pulse
quency
Kl
Circuit
Breaker
Type
kV MVA E
kV I E
/
K
Class
Class
kVrms
K kV
rms
Amps
kA
rms
Cycles
Sec
.
kV
rms
kA
rms
kA
rms
kA
rms
kA
Crest
crest
1200
S
8
&
78
©
97
&
132
©
5
-
G
MI
-
250
©
1.24
19 60 29
5
2
3.85 36 36
4
,
16 250
4.76
2000
1200
350
4.76
1.19 19
60
2000
41
5
2
4.0
49
49
78
132
5
-
G
MI
-
350
4.16
3000
1200
1.25
2
8.25
36
95
2000
33
5
6.6
41 41
66
111
7
-
G
MI
-
500
7.2
500
3000
15
-
G
MI
-
500
®
1200
37
&
58
©
62
&
97
©
500
1.30 36
95 18
5
2
11.5
23 23
13.8
15
2000
1200
58
&
77
©
97
&
130
©
1.30 36
95
2000
28
5
2
11.5
36
36
15
-
GMI
-
750
13.8
750 15
3000
1200
15
-
GMI
*
1000
©
48
77
130
13.8
1000 15
1
30 36
95
2000
37
5
2
115
48
3000
1
High
close and latch
(
momentary
)
rating
available
for
special
application
,
2
Maximum
voltage
for
which the breaker is
designed
and the
upper
limit
for
operation
.
3
K
is the ratio
of
rated maximum
voltage
to
the
lower
limit
of
the
range
of
operating
voltage
in
which the
required
symmetrical
and
asymmetrical
interrupting
capabilities
vary
in
inverse
proportion
to
the
operating voltage
.
4
3000
ampere
units available
with
increased
fan
-
cooled
rating
of
3750
amperes
.
5
To
obtain the
required
symmetrical
interrupting capability
of
a
circuit breaker
at
an
operating voltage
between
11
K
times
rated
max
-
imum
voltage
and rated maximum
voltage
,
the
following
formula
shall
be
used
:
Required
Symmetrical
Interrupting
Capacity
=
Rated
Short
-
Circuit Current
x
Rated
Maximum
Voltage
Operating
Voltage
For
operating
voltages
below
1
/
K
times rated maximum
voltage
,
the
required
symmetrical interrupting capability
of
the circuit
breaker shall
be
equal
to
K
times rated short
-
circuit
current
.
6
With
the limitations stated
in
5.10
of
ANSI Standard C
37.04
-
1979
,
all values
apply
for
polyphase
and line
-
to
-
line
faults
.
For
single
phase
-
to
-
ground
faults
,
the
specific
conditions stated
in
5.10
.
2.3
of
ANSI Standard C
37.04
-
1979
apply
.
7
Current
values
in
this
column
are
not to
be
exceeded
even
for
operating voltages
below
1
/
K
times rated maximum
voltage
.
For
vol
-
tages
between
rated
maximum
voltage
and
11
K
times
rated maximum
voltage
,
follow
5
above
,
8
Current
values
in
this column
are
independent
of
operating voltage
up
to
an
including
rated
maximum
voltage
.
9
Included
for reference
only
.
Courtesy of NationalSwitchgear.com