GE IAC - Page 7

GEK
-
86054
rating
)
varies
(
approximately
)
inversely
to
the
square
of
the
current
rating
,
following
equation
illustrates
this
:
The
Impedance
of
Any
Tap
at
Tap
Amps
/
Minimum
Tap
Amps
\
2
x
/
Impedance
at
\
Tap
Amps
^
Minimum
Tap
TABLE
VII
BURDENS
OF
INDUCTION
UNIT
COILS
VOLT
-
AMPS
AT
FIVE
AMPS
CALCULATED
FROM
INPUT
AT
MINIMUM
PICKUP
(
I
?
Z
1
PICKUP
RANGE
(
AMPS
1
FREQ
.
(
Hz
)
TAP
POWER
FACTOR
WATTS
1.0
-
3.0
60
1
118.4
15.2
0.13
50
1
98.6
12.7
0.13
1.5
-
4.5
60
1.5
52.5
6.7
0.13
50
1.5
43.7
5.6
0.13
2.5
-
7.5
60
2.5
18.8
2.5
0.13
50
2.5
15.7
2.1
0.13
4.0
-
12
60
4
7.4
0.95
0.13
50
4
6.2
0.79
0.13
For
forms
51
and
up
,
the
burden
of
the
induction
unit
is
as
shown
in
Table
VIII
:
TABLE
VIII
BURDENS
OF
INDUCTION
UNIT
COILS
-
FORMS
51
AND
UP
PICKUP
RANGE
(
AMPS
'
)
VOLT
-
AMPS
AT
FIVE
AMPS
CALCULATED
FROM
INPUT
AT
MINIMUM
PICKUP
(
I
^
Zl
FREQ
.
IMP
.
POWER
FACTOR
(
Hz
)
TAP
OHMS
0.6
-
1.8
60
0.6
110.75
4.43
0.32
0.33
50
0.6
48.0
1.92
1.5
-
4.5
60
1.5
17.75
0.71
0.35
50
1.5
11.5
0.46
0.37
2.5
-
7.5
60
2.5
6.75
0.27
0.44
50
2.5
5.75
0.23
0.47
4.0
-
12
60
4.0
4.48
0.18
0.52
0.47
50
4.0
4.05
0.16
7
Courtesy of NationalSwitchgear.com