GE GCX51A - Burdens

GEI
-
98328
BURDENS
The
maximum
current
burdens
for
the
relay
at
5
amperes
are
listed
in
Table
VI
.
TABLE
VI
P
.
F
.
VA
AMPS CY
.
X
W
R
U
7
T
2
50
87
b
034
8
0732
5
These data
are
for
the
1.0
ohm
minimum
basic
reach
tap
of
the
standard
-
reach
relay
.
The burden
on
the
0.5
and
.
25
taps
,
and
on
the
0.4
,
0.2
and
0.1
ohm
taps
of
the short
-
reach
relay
,
will
be
slightly
lower
.
The
potential
burden
will
vary
with
the
tap
settings
used
for
the
OHM
and
MHO
unit
restraint
circuits and
can
be
calculated
from
the
following
formulae
,
potential
burdens
are
at
120
volts and
are
for
60
cycle
relays
:
All
OHM
Unit
:
No
.
1
Tap
Setting
(
%
)
2
VA
=
a
+
jb
Input
Tap
Setting
(
%
)
MHO
Unit
:
E
2
Tap
Setting
(
%
)
2
+
(
e
+
jf
)
VA
=
c
+
jd
Input Tap
Setting
(
%
)
The
terms
(
a
+
jb
)
and
(
c
+
jd
)
represent
the burdens
of
the
OHM
and
MHO
unit
restraint
circuits
with
input
and
output taps
on
100
%
.
The
term
(
e
+
jf
)
represents
the
burden
of
the
MHO
unit
polarizing
circuit
.
The values
of
these
terms
are
given
in
Table
VII
.
TABLE
VIIA
POTENTIAL
BURDENS
60
Cycles
Frequency
Rating
(
a
+
jb
)
MHO
Restraint
(
c
+
jd
)
MHO
Polarizing
(
e
+
jf
)
UHM
12.3
+
jO
4.6
-
j
5.7
10.0
+
jO
TABLE
VIIB
BURDENS
FOR
THE
OVERCURRENT
UNIT
VA
at
5
Amps
/
60
Cyc
5
Amps
/
60
Cyc
W
at
Calibration
Range
Rated
Amps
12
.
/
3.56
r
-
4
1
11.5
2
-
8
6
0.8
2.65
4
-
16
12
These burdens
are
measured
with
the
armature
in
the
dropped
-
out
position
.
Values
are
for
minimum
pickup
settings
.
11
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