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If
the
tripping
s hould be used,
does not pass through the contacts of the target and seal-in coils of
the protective relay.
CONTACTS
The
current-closing
voltages
not
exceeding
limited by the ratings of the seal -in unit.
Burdens for the time-overcurrent unit are given in Table IX.
RANGE
HZ
(AMPS)
0.5 - 0.4
60
0.5
1.5 -12.0
60
1.5
2.0 - 16.0
60
2.0
50
0.5 - 4.0
0.5
1.5 -12.0
50
2.0 -16.0
50
2.0
NOTE:
The
impedance
tap
of
p ick - u p
(approximately )
example,
impedance of
The
impedance
( . 5/2) 2
GEK-34054
current
exceeds
the connections being such that the tripping current
rating
250
volts.
BURDENS
TABLE IX
MIN.
BURDENS AT MIN.
TAP
PICKUP
R
0.40
3.90
4.15
0.23
0.53
0.58
0.14
0.30
0.33
1.16
3.25
3.45
1.5
0.19
0.44
0.48
0.25
0.2
0.116
values
each
relay.
c urrent
( TAP
as the square of the tap rating.
for
a
relay
the
0. 5
of
the
4. 15 - 0.26.
X
30
amperes,
of
the
contacts
The
current-carrying
BURDENS IN
OHMS (Z}
TIMES PICKUP
z
3
10
20.0
4.20
2.90
2.20
0.58
0.36
0.28
0.34
0.22
0.15
3.45
2.41
1.82
0.48
0.298 0.23
0.27
7
0.180 0.12
given
are those
The
impedance
for
RAT ING )
v aries
with
0. 5
-
4. 0
amp
tap
is
given
2. 0
amp
tap
at
8
an
auxiliary
relay
is
30
amperes
ratin g
VA AT 5 AMPS
CALCULATED FROM
IMPEDANCE AT MIN.
PICKUP (I 2 Z)
104.0
14.5
8.25
86.25
12.00
6.75
for
the
minimum
other
taps
at
i n v er s e l y
For
amp
range,
the
as
4. 1 5
ohms.
2. 0
amperes
is
for
is
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